The hard portion of the tooth surrounding the pulp, covered by enamel on the crown and cementum on the root, which is harder and denser than bone but softer than enamel, and is thus readily abraded when left unprotected. (From Jablonski, Dictionary of Dentistry, 1992)
Substances which reduce or eliminate dentinal sensitivity or the pain associated with a source of stimulus (such as touch, heat, or cold) at the orifice of exposed dentinal tubules causing the movement of tubular fluid that in turn stimulates tooth nerve receptors.
Works containing information articles on subjects in every field of knowledge, usually arranged in alphabetical order, or a similar work limited to a special field or subject. (From The ALA Glossary of Library and Information Science, 1983)
The property of dentin that permits passage of light, heat, cold, and chemical substances. It does not include penetration by microorganisms.
An increased reactivity to specific antigens mediated not by antibodies but by cells.
Dentifrices that are formulated into a paste form. They typically contain abrasives, HUMECTANTS; DETERGENTS; FLAVORING AGENTS; and CARIOSTATIC AGENTS.
A hard thin translucent layer of calcified substance which envelops and protects the dentin of the crown of the tooth. It is the hardest substance in the body and is almost entirely composed of calcium salts. Under the microscope, it is composed of thin rods (enamel prisms) held together by cementing substance, and surrounded by an enamel sheath. (From Jablonski, Dictionary of Dentistry, 1992, p286)
Cements that act through infiltration and polymerization within the dentinal matrix and are used for dental restoration. They can be adhesive resins themselves, adhesion-promoting monomers, or polymerization initiators that act in concert with other agents to form a dentin-bonding system.
Conditions in which a bifurcation or trifurcation of the molar tooth root becomes denuded as a result of periodontal disease. It may be followed by tooth mobility, temperature sensitivity, pain, and alveolar bone resorption.
The process of repairing broken or worn parts of a PERMANENT DENTAL RESTORATION.
Occlusal wear of the surfaces of restorations and surface wear of dentures.
Endodontic procedure performed to induce TOOTH APEX barrier development. ROOT CANAL FILLING MATERIALS are used to repair open apex or DENTAL PULP NECROSIS in an immature tooth. CALCIUM HYDROXIDE and mineral trioxide aggregate are commonly used as the filling materials.
Dental procedure in which part of the pulp chamber is removed from the crown of a tooth.
It is used as an oxidizing and bleaching agent and as a disinfectant. (From Grant & Hackh's Chemical Dictionary, 5th ed)
A publication issued at stated, more or less regular, intervals.
Individual's rights to obtain and use information collected or generated by others.
A quantitative measure of the frequency on average with which articles in a journal have been cited in a given period of time.
The use of statistical methods in the analysis of a body of literature to reveal the historical development of subject fields and patterns of authorship, publication, and use. Formerly called statistical bibliography. (from The ALA Glossary of Library and Information Science, 1983)
"The business or profession of the commercial production and issuance of literature" (Webster's 3d). It includes the publisher, publication processes, editing and editors. Production may be by conventional printing methods or by electronic publishing.
A polymer obtained by reacting polyacrylic acid with a special anion-leachable glass (alumino-silicate). The resulting cement is more durable and tougher than others in that the materials comprising the polymer backbone do not leach out.
Dental cements composed either of polymethyl methacrylate or dimethacrylate, produced by mixing an acrylic monomer liquid with acrylic polymers and mineral fillers. The cement is insoluble in water and is thus resistant to fluids in the mouth, but is also irritating to the dental pulp. It is used chiefly as a luting agent for fabricated and temporary restorations. (Jablonski's Dictionary of Dentistry, 1992, p159)
An adhesion procedure for orthodontic attachments, such as plastic DENTAL CROWNS. This process usually includes the application of an adhesive material (DENTAL CEMENTS) and letting it harden in-place by light or chemical curing.
The testing of materials and devices, especially those used for PROSTHESES AND IMPLANTS; SUTURES; TISSUE ADHESIVES; etc., for hardness, strength, durability, safety, efficacy, and biocompatibility.
The use of a treatment material (tissue conditioner) to re-establish tone and health to irritated oral soft tissue, usually applied to the edentulous alveolar ridge.
The internal resistance of a material to moving some parts of it parallel to a fixed plane, in contrast to stretching (TENSILE STRENGTH) or compression (COMPRESSIVE STRENGTH). Ionic crystals are brittle because, when subjected to shear, ions of the same charge are brought next to each other, which causes repulsion.
Inorganic salts of hydrofluoric acid, HF, in which the fluorine atom is in the -1 oxidation state. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed) Sodium and stannous salts are commonly used in dentifrices.
A nonmetallic, diatomic gas that is a trace element and member of the halogen family. It is used in dentistry as flouride (FLUORIDES) to prevent dental caries.
The fusion of ceramics (porcelain) to an alloy of two or more metals for use in restorative and prosthodontic dentistry. Examples of metal alloys employed include cobalt-chromium, gold-palladium, gold-platinum-palladium, and nickel-based alloys.
A type of porcelain used in dental restorations, either jacket crowns or inlays, artificial teeth, or metal-ceramic crowns. It is essentially a mixture of particles of feldspar and quartz, the feldspar melting first and providing a glass matrix for the quartz. Dental porcelain is produced by mixing ceramic powder (a mixture of quartz, kaolin, pigments, opacifiers, a suitable flux, and other substances) with distilled water. (From Jablonski's Dictionary of Dentistry, 1992)
One of a set of bone-like structures in the mouth used for biting and chewing.
Products made by baking or firing nonmetallic minerals (clay and similar materials). In making dental restorations or parts of restorations the material is fused porcelain. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed & Boucher's Clinical Dental Terminology, 4th ed)
A partial denture attached to prepared natural teeth, roots, or implants by cementation.
A restoration designed to remain in service for not less than 20 to 30 years, usually made of gold casting, cohesive gold, or amalgam. (Jablonski, Dictionary of Dentistry, 1992)
Lists of words, usually in alphabetical order, giving information about form, pronunciation, etymology, grammar, and meaning.

The root surface in human teeth: a microradiographic study. (1/1113)

In an attempt to clarify the nature of the human cemento-dentinal junction, ground sections of incompletely formed and fully formed extracted teeth were prepared and their histology compared with their microradiographic appearances. The results showed that incompletely formed teeth possess distinctive surface layers outside the granular layer of Tomes. The evidence indicates that these layers are of dentinal origin; their presence during development supports previous explanations by the author of the hyaline layer of Hopewell-Smith and of so-called intermediate cementum. The results also indicate that the granular layer of Tomes does not represent the outer limit of root dentine. The relationship of these surface layers to the definitive cementum which is present in fully formed teeth was studied in both young and older patients. From the results it was concluded that cementum formation begins in the more apical region of the teeth at a time when root formation is well advanced, and that it spreads towards the crown rather than in the generally accepted reverse direction.  (+info)

Predicting protein decomposition: the case of aspartic-acid racemization kinetics. (2/1113)

The increase in proportion of the non-biological (D-) isomer of aspartic acid (Asp) relative to the L-isomer has been widely used in archaeology and geochemistry as a tool for dating. the method has proved controversial, particularly when used for bones. The non-linear kinetics of Asp racemization have prompted a number of suggestions as to the underlying mechanism(s) and have led to the use of mathematical transformations which linearize the increase in D-Asp with respect to time. Using one example, a suggestion that the initial rapid phase of Asp racemization is due to a contribution from asparagine (Asn), we demonstrate how a simple model of the degradation and racemization of Asn can be used to predict the observed kinetics. A more complex model of peptide bound Asx (Asn + Asp) racemization, which occurs via the formation of a cyclic succinimide (Asu), can be used to correctly predict Asx racemization kinetics in proteins at high temperatures (95-140 degrees C). The model fails to predict racemization kinetics in dentine collagen at 37 degrees C. The reason for this is that Asu formation is highly conformation dependent and is predicted to occur extremely slowly in triple helical collagen. As conformation strongly influences the rate of Asu formation and hence Asx racemization, the use of extrapolation from high temperatures to estimate racemization kinetics of Asx in proteins below their denaturation temperature is called into question. In the case of archaeological bone, we argue that the D:L ratio of Asx reflects the proportion of non-helical to helical collagen, overlain by the effects of leaching of more soluble (and conformationally unconstrained) peptides. Thus, racemization kinetics in bone are potentially unpredictable, and the proposed use of Asx racemization to estimate the extent of DNA depurination in archaeological bones is challenged.  (+info)

Steric effects of N-acyl group in O-methacryloyl-N-acyl tyrosines on the adhesiveness of unetched human dentin. (3/1113)

We have prepared various O-methacryloyl-N-acyl tyrosines (MAATY) to reveal the relationship between molecular structure near carboxylic acid and adhesive strength of MAATY-HEMA type adhesive resin to unetched dentin. In this study, we attempted to change the steric hindrance effect without changing the HLB value, i.e., introducing an iso-acyl group instead of n-acyl group into MAATY. O-methacryloyl-N-ethylbutyryl tyrosine (MIHTY) showed significantly lower adhesive strength when compared with O-methacryloyl-N-hexanoyl tyrosine even though both MAATY have the same HLB value. The possible explanation of the significantly different adhesive strength was that the 2-ethylbutyryl group in MIHTY was bulky, resulting in inhibition of the hydrogen bonding of the carboxylic group. The HLB value is independent of the steric effect of molecular structure, and thus the steric factor should be taken into consideration for the explanation of different adhesive strengths within the adhesive monomers having the same HLB value but different molecular structures.  (+info)

Dentinal tubule occlusion with lanthanum fluoride and powdered apatite glass ceramics in vitro. (4/1113)

To simulate hypersensitive dentin, the smear layer and dentinal plugs of bovine root dentin specimens were removed by immersion in 10% phosphoric acid, polishing with hydroxyapatite particles, and ultrasonic cleansing. The fluoride-tannic acid-lanthanum-apatite (FTLA) group was treated with acidulated phosphate fluoride (APF) containing tannic acid followed by rubbing with a paste of lanthanum chloride (LaCl3) and powdered apatite glass ceramics. The treated specimens were immersed in a remineralizing solution that mimics saliva for 6 weeks. The SEM observations revealed that the treated surfaces of the FTLA group were completely covered with fine spherical compounds and the dentinal tubules were occluded with plugs to a depth of about 3 microns. Fluoride and lanthanum were detected to a depth of over 20 microns by EPMA observation. After the remineralization, the surface of FTLA-treated specimen did not have any opened tubules and showed a remarkable increase in the number of fine spherical deposits in the dentinal tubules. These results suggest that the reaction products produced by sequential treatment with acidic fluoride and LaCl3 and powdered apatite glass ceramics are able to effectively occlude dentinal tubules.  (+info)

Osteoclast differentiation factor acts as a multifunctional regulator in murine osteoclast differentiation and function. (5/1113)

Osteoclast differentiation factor (ODF), a novel member of the TNF ligand family, is expressed as a membrane-associated protein by osteoblasts/stromal cells. The soluble form of ODF (sODF) induces the differentiation of osteoclast precursors into osteoclasts in the presence of M-CSF. Here, the effects of sODF on the survival, multinucleation, and pit-forming activity of murine osteoclasts were examined in comparison with those of M-CSF and IL-1. Osteoclast-like cells (OCLs) formed in cocultures of murine osteoblasts and bone marrow cells expressed mRNA of RANK (receptor activator of NF-kappaB), a receptor of ODF. The survival of OCLs was enhanced by the addition of each of sODF, M-CSF, and IL-1. sODF, as well as IL-1, activated NF-kappaB and c-Jun N-terminal protein kinase (JNK) in OCLs. Like M-CSF and IL-1, sODF stimulated the survival and multinucleation of prefusion osteoclasts (pOCs) isolated from the coculture. When pOCs were cultured on dentine slices, resorption pits were formed on the slices in the presence of either sODF or IL-1 but not in that of M-CSF. A soluble form of RANK as well as osteoprotegerin/osteoclastogenesis inhibitory factor, a decoy receptor of ODF, blocked OCL formation and prevented the survival, multinucleation, and pit-forming activity of pOCs induced by sODF. These results suggest that ODF regulates not only osteoclast differentiation but also osteoclast function in mice through the receptor RANK.  (+info)

Deficiency of SHP-1 protein-tyrosine phosphatase activity results in heightened osteoclast function and decreased bone density. (6/1113)

Mice homozygous for the motheaten (Hcphme) or viable motheaten (Hcphme-v) mutations are deficient in functional SHP-1 protein-tyrosine phosphatase and show severe defects in hematopoiesis. Comparison of femurs from mev/mev mice revealed significant decreases in bone mineral density (0.33 +/- 0.03 mg/mm3 for mev/mevversus 0.41 +/- 0.01 mg/mm3 for controls) and mineral content (1.97 +/- 0.36 mg for mev/mevversus 10.64 +/- 0.67 for controls) compared with littermate controls. Viable motheaten mice also showed reduced amounts of trabecular bone and decreased cortical thickness. These bone abnormalities were associated with a 14% increase in numbers of multinucleated osteoclasts and an increase in osteoclast resorption activity. In co-cultures of normal osteoblasts with mutant or control bone marrow cells, numbers of osteoclasts developing from mutant mice were increased compared with littermate control mice. Although mev/mev osteoclasts develop in the absence of colony-stimulating factor (CSF)-1, nevertheless cultured osteoclasts show increased size in the presence of CSF-1. CSF-1-deficient osteopetrosis (op/op) mutant mice develop severe osteosclerosis. However, doubly homozygous mev/mevop/op mice show an expansion of bone marrow cavities and reduced trabecular bone mass compared with op/op mice. Western blot analysis showed that several proteins that were markedly hyperphosphorylated on tyrosine residues were detected in the motheaten osteoclasts, including a novel 126-kd phosphotyrosine protein. The marked hyperphosphorylation of a 126-kd protein in motheaten osteoclasts suggests that this protein depends on SHP-1 for dephosphorylation. These findings demonstrate that the decreased SHP-1 catalytic activity in me/me and mev/mev mice results in an increased population of activated osteoclasts and consequent reduction in bone density.  (+info)

Intermittent inhibition of dentin mineralization of rat incisors under continual infusion of 1-hydroxyethylidene-1, 1-bisphosphonate (HEBP) using a subcutaneous mini osmotic pump. (7/1113)

The inhibitory effect of the continual administration of 1-hydroxyethylidene-1, 1-bisphosphonate (HEBP) (8 mgP/kg/day) through a mini osmotic pump on dentin mineralization was examined in relation to the diurnal rhythm of the rat and compared with that of daily injections of same amounts of HEBP known to inhibit dentin mineralization. After daily injections of HEBP, a series of alternating rows of mineralized and non-mineralized dentin islands appeared in the newly formed portion of the crown-analogue of rat incisors. A similar phenomenon occurred under the continual administration of HEBP in rats raised either under regular environmental photofraction or constant lighting conditions. The average distance between the adjacent mineralized dentin islands was 521.0 +/- 51.3 microns in the injected rats. After continual HEBP administration, this was 426.0 +/- 13.2 microns and 416.5 +/- 19.4 microns under ordinary photofraction and constant light, respectively. Although the pattern of individual mineralized dentin islands tended to become irregular in nocturnal rats, no statistical difference was noted between the two values. Rows of mineralized and non-mineralized dentin islands also appeared in the root analogue dentin. No sign of the intermittent inhibition of mineralization was recognized in mesodermal hard tissues other than dentin in the HEBP-affected animals. These data implicate the presence of intrinsic cycles in dentin mineralization at the growing end of rat incisors independent of environmental photofraction as well as the ameloblast function.  (+info)

Interaction between vacuolar H(+)-ATPase and microfilaments during osteoclast activation. (8/1113)

Vacuolar H(+)-ATPases (V-ATPases) are multisubunit enzymes that acidify compartments of the vacuolar system of all eukaryotic cells. In osteoclasts, the cells that degrade bone, V-ATPases, are recruited from intracellular membrane compartments to the ruffled membrane, a specialized domain of the plasma membrane, where they are maintained at high densities, serving to acidify the resorption bay at the osteoclast attachment site on bone (Blair, H. C., Teitelbaum, S. L., Ghiselli, R., and Gluck, S. L. (1989) Science 249, 855-857). Here, we describe a new mechanism involved in controlling the activity of the bone-resorptive cell. V-ATPase in osteoclasts cultured in vitro was found to form a detergent-insoluble complex with actin and myosin II through direct binding of V-ATPase to actin filaments. Plating bone marrow cells onto dentine slices, a physiologic stimulus that activates osteoclast resorption, produced a profound change in the association of the V-ATPase with actin, assayed by coimmunoprecipitation and immunocytochemical colocalization of actin filaments and V-ATPase in osteoclasts. Mouse marrow and bovine kidney V-ATPase bound rabbit muscle F-actin directly with a maximum stoichiometry of 1 mol of V-ATPase per 8 mol of F-actin and an apparent affinity of 0.05 microM. Electron microscopy of negatively stained samples confirmed the binding interaction. These findings link transport of V-ATPase to reorganization of the actin cytoskeleton during osteoclast activation.  (+info)

TY - JOUR. T1 - Site specific properties of carious dentin matrices biomodified with collagen cross-linkers. AU - Bedran-Russo, Ana K.. AU - Karol, Sachin. AU - Pashley, David H.. AU - Viana, Grace. N1 - Copyright: Copyright 2013 Elsevier B.V., All rights reserved.. PY - 2013/10. Y1 - 2013/10. N2 - Purpose: To assess in non-cavitated carious teeth the mechanical properties of dentin matrix by measuring its reduced modulus of elasticity and the effect of dentin biomodification strategies on three dentin matrix zones: caries-affected, apparently normal dentin below caries-affected zone and sound dentin far from carious site. Methods: Nano-indentations were performed on dentin matrices of carious molars before and after surface modification using known cross-linking agents (glutaraldehyde, proanthocyanidins from grape seed extract and carbodiimide). Results: Statistically significant differences were observed between dentin zones of demineralized dentin prior to surface biomodification (P, 0.05). ...
This study was conducted to compare the shear bond strengths of composite resin bonded to Er:YAG laser or bur-prepared dentin surfaces using three self-etching adhesive systems. The occlusal surfaces of 120 human third molars were ground flat to expose dentin. The dentin was prepared using either a carbide bur or an Er:YAG laser at 350 mJ/pulse and 10 Hz (fluence, 44.5 J/cm2). Three different self-etching adhesive systems were applied: iBond™, Xeno III™ and Clearfil SE Bond™. Rods of composite resin were bonded to dentin surfaces and shear bond tests were carried out. Both dentin surfaces after debonding and resin rods were observed using a scanning electron microscope. When the Xeno III™ was used, no difference was observed on shear bond strength values when bur and Er:YAG laser were compared. When using iBond™ and Clearfil SE Bond™, bond strength values measured on Er:YAG-laser-prepared surfaces were lower than those observed on bur-prepared surfaces. The absence of smear layer formation
TY - JOUR. T1 - Correlation among dentin depth, permeability, and bond strength of adhesive resins. AU - Tagami, J.. AU - Tao, L.. AU - Pashley, D. H.. PY - 1990/1. Y1 - 1990/1. N2 - Correlations among dentin permeability, dentin depth, and dentin bonding of Scotchbond, Clearfil New Bond, and Superbond C&B were studied in bovine incisor crown segments. Since the dentin surface was prepared on deeper dentin, the permeability of the dentin increased both in the presence of, and especially after removal of, the smear layer. In general, the deeper the dentin, the lower the bond strengths of Scotchbond, Clearfil New Bond, and Superbond C&B. The higher the dentin permeability, the lower the bond strength of Superbond C&B, but there was no simple relationship in the case of either Scotchbond or Clearfil New Bond. The bond strength of Superbond C&B was much higher than those of Scotchbond or Clearfil New Bond at any depth of dentin. Superbond C&B should be considered as both an enamel- and ...
TY - JOUR. T1 - Comparative post irrigation evaluation of calcium loss and its effect on microhardness of radicular dentin. AU - Khosla, Manak. AU - Mala, Kundabala. AU - Shenoy, Ramya. PY - 2017/10/1. Y1 - 2017/10/1. N2 - This study was conducted to compare calcium loss and microhardness reduction of radicular dentin following treatment with 17% EDTA, 10% citric acid, 5% maleic acid, and MTAD, by estimating calcium loss, and radicular dentin microhardness by using Atomic absorption spectrophotometry and by Vickers hardness tester. The results were statistically evaluated using one way ANOVA test and performed at 95% level of confidence and Spearmans correlation test was applied to determine correlation between calcium liberation and radicular dentin microhardness. All the experimental chelating agents bring about calcium loss and reduction in microhardness from radicular dentin.Study concluded that at 5 minutes, 5% maleic acid as a chelating agent causes the maximum calcium loss and ...
OBJECTIVES: The submicron hiatus represents a potential space between the base of the collagen network and the mineralized dentin when dentin is acid-etched for bonding. These spaces were observed in SEM studies after acid-etched dentin specimens were critical point dried or dehydrated in hexamethyldisilasane. However, they have never been identified in TEM studies of dentin hybrid layers. This study critically examined the cause of submicron hiati formation using a silver staining technique to measure nanoleakage. METHODS: Two multi-step, total-etch adhesives (One-Step, Bisco; Single Bond, 3M) and two single-step, self-etching adhesives (Prompt L-Pop, ESPE; One-Up Bond F, Tokuyama) were examined. Flat dentin surfaces were bonded with these adhesives and a lining composite. In each adhesive group, 0.8mm thick slabs from the same bonded tooth were coated with nail varnish applied 1mm from the bonded interfaces. The varnish was either left to dry completely for 10min before immersing in 50wt% ...
Purpose: To assess the effect of different peri- and intertubular dentin mineralization conditions and etching on shear bond strength in vitro. Materials and Methods: One hundred fifty crowns of extracted bovine incisors were embedded in resin and ground to expose the buccal coronal dentin. Sixty specimens were subjected to a demineralizing solution (DS) and another 60 teeth to a bacterial-based laboratory caries model (S. mutans, SM). Thirty specimens of each demineralization protocol (DS and SM) were randomly selected and remineralized (-R). Thirty sound dentin specimens served as control (C). Resin composite buildups (Tetric) were bonded after application of one of the following adhesives: a one-step self-etching adhesive (Xeno III), and a self-etching adhesive (Syntac Classic) without (three-step) and with prior additional 35% phosphoric acid etching (etch-and-rinse, four-step). Teeth were subjected to shear bond strength testing in a universal testing device at a crosshead speed of 0.5 ...
Introduction. The mechanism for adhesive bonding to dental substrates, especially to dentin, has been extensively studied in the last few decades. The establishment of effective interlocking occurs when the adhesive penetrates into the intratubular and intertubular dentin so that resin penetration into the conditioned dentin results in the formation of intratubular resin tags and a hybrid layer.1 Micromechanical attachment is the most important mechanism of resin adhesion to dentin. However, there are several factors that can affect hybrid layer and resin tag formation, such as acid-etching, the moisture conditions of the substrate, and adhesive and dentin depth.2. During dentin acid-etching, the mineral content of the dentin surface is removed, and the collagen fibrils remain supported by water.3 The moist bonding technique prevents the collagen fibers from collapsing and provides stability to the collagen, thus enabling greater infiltration of adhesive monomers.4 However, some studies have ...
Statement of the Problem: Low pH of self-etch adhesives might cause suboptimal polymerization. Purpose: This study aimed to evaluate the effect of dentin depth (deep and superficial) on polymerization efficacy of two self-etch adhesives, with different pH by means of Knoop hardness test. Materials and Method: In this in vitro study, sixty sound molars were used to prepare 30 superficial dentin and 30 deep dentin specimens. Dentin specimens of each depth were randomly distributed into two equal subgroups (N=15) and bonded by either Adper Prompt L-Pop (strong self-etch adhesive) or Adper Easy Bond (mild self-etch adhesive). Knoop hardness test was employed to evaluate degree of cross-linking of the adhesives. Data were analyzed with SPSS 16, using two-way ANOVA to compare mean hardness values of the study groups (p | 0.05). Results: There was no interaction effect between dentin depth and the type of adhesive (p = 0.36). Regardless of dentin depth, hardness of Adper Easy Bond was significantly higher than
TY - JOUR. T1 - The effect of flowable composite lining and dentin location on microtensile bond strength and internal fracture formation. AU - Kominami, Nao. AU - Shimada, Yasushi. AU - Hosaka, Keiichi. AU - Luong, Minh Nguyet. AU - Yoshiyama, Masahiro. AU - Sadr, Alireza. AU - Sumi, Yasunori. AU - Tagami, Junji. PY - 2019. Y1 - 2019. N2 - The objective of this study was to determine the effect of flowable composite lining and dentin location on internal dentin fracture formation in the microtensile bond strength (MTBS) test using swept-source optical coherence tomography (SS-OCT). MTBS test beams (1.0×1.0 mm) were prepared from human superficial and deep dentin, which was bonded with a self-etch adhesive (Clearfil SE Bond) and hybrid composite resin (Clearfil AP-X), with or without flowable lining (Clearfil Majesty ES-Flow). We tested 4 groups according to placement technique (with vs. without flowable liner) and dentin (superficial vs. deep) locations. Cross-sectional 2D images of the bonded ...
Microtensile bond strength of Resin composite to Normal dentin and Caries - affected dentin with total-etch and self-etch bonding adhesives before and after thermocycling
The influence of chlorhexidine on the remineralization of demineralized dentine Duck-Su Kim , Jongryul Kim , Kyoung-Kyu Choi and Sun-Young Kim Journal of Dentistry, 2011-12-01, Volume 39, Issue 12, Pages 855-862, Copyright © 2011 Elsevier Ltd Abstract Objectives To examine the differences in the amounts of bound chlorhexidine (CHX) on demineralized dentine blocks and to investigate the different aspects of remineralization of demineralized dentine according to different concentrations of CHX. Methods Dentine blocks (2 mm × 7 mm × 0.9 mm) were demineralized in 0.2 M formic acid solution. Amount of bound CHX on the dentine blocks was measured on a spectrophotometer after the dentine block was soaked in 0.02%, 0.2%, or 2% CHX solutions for 1 min. The change in elastic modulus of dentine block stored in simulated body fluids was measured at 0 (baseline), 2, 4, and 6 weeks after storage. The micromorphological aspects of the samples were observed using a field emission scanning electron microscope ...
Definition of primary dentin in the Legal Dictionary - by Free online English dictionary and encyclopedia. What is primary dentin? Meaning of primary dentin as a legal term. What does primary dentin mean in law?
The aim of this study was to examine the morphology of the hybrid layer (HL) of bonded water-stored specimens after different chemical pre-treatments of dentin. Materials and methods. Twenty-seven recently extracted human molars were selected. Fifty-four dentin disks in middle/deep dentin were obtained with a slow speed saw with a diamond-impregnated disk under water lubrication. Smear layers were created with 180 grit silicon carbide under running water for 1 min. Different pre-treatments of dentin were: Group (1) no treatment; Group (2) 35% H3PO4 etch for 15 s followed by 10% glutaraldehyde for 120 s; Group (3) 37% H3PO4 etch for 15 s followed by 5% NaOCl for 120 s. Three dentin bonding agents (DBAs), Prime and Bond NT (P and B), AdmiraBond (AB), and Clearfil SE Bond (SEB) were applied in association with a resin composite following the manufacturers directions. Each specimen was then longitudinally sectioned and polished with wet SiC papers (up to #4000 grit). Impressions of the polished ...
The use of protein cross-linking agents during bonding procedures has been recently proposed to improve bond durability. This study aimed to use zymography and in situ zymography techniques to evaluate the ability of 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC) cross-linker to inhibit matrix metalloproteinase (MMP) activity. The hypotheses tested were that: (1) bonding procedures increase dentin gelatinolytic activity and (2) EDC pre-treatment prevents this enzymatic activity. The zymographic assay was performed on protein extracts obtained from dentin powder treated with Optibond FL or Scotchbond 1XT with or without 0.3M EDC pre-treatment. For in situ zymography, adhesive/dentin interfaces were created with the same adhesives applied to acid-etched dentin slabs pre-treated or not with EDC conditioner. Zymograms revealed increased expression of dentin endogenous MMP-2 and -9 after adhesive application, while the use of EDC as a primer inactivated dentin gelatinases. Results of in situ zymograpy
TY - JOUR. T1 - Demonstration of type III collagen in the dentin of mice. AU - Nagata, Kengo. AU - Huang, Yu Hsin. AU - Ohsaki, Yasuyoshi. AU - Kukita, Toshio. AU - Nakata, Minoru. AU - Kurisu, Kojiro. PY - 1992/1/1. Y1 - 1992/1/1. N2 - It has been reported that, although type III collagen is present in human dentin where there is dentinogenesis imperfecta and in reparative dentin, it is absent in normal dentin. In a preliminary study, however, we observed evidence showing that small amounts of fibers showing positive labeling for type III collagen are present in the molars of normal mice. In the present study, in order to localize type III in normal dentin, immunofluorescent and immunoelectron microscopic examinations of the molars of normal mice were carried out using affinity-purified antibodies to mouse type III and type I collagen. The fibers positive for type III collagen were much more frequently observed in the root than in the crown. These fibers ran in peritubular dentin or near that ...
TY - JOUR. T1 - The effects of radicular dentine treated with double antibiotic paste and ethylenediaminetetraacetic acid on the attachment and proliferation of dental pulp stem cells. AU - Kim, Ki Wan. AU - Yassen, Ghaeth H.. AU - Ehrlich, Ygal. AU - Spolnik, Kenneth. AU - Platt, Jeffrey A.. AU - Windsor, L. Jack. PY - 2015/10/1. Y1 - 2015/10/1. N2 - This study explored the effects of dentine treated with two concentrations of double antibiotic paste (DAP) and ethylenediaminetetraacetic acid (EDTA) on the attachment and proliferation of dental pulp stem cells (DPSCs). Materials and Methods: Radicular dentine samples were prepared with identical dimensions and randomized into six groups (n = 4). Four groups were treated with double antibiotic paste (DAP) at concentrations of 500 mg ml-1 or 1 mg ml-1 with or without EDTA. The other two groups were treated with EDTA only or received no treatment. DPSCs were seeded on each dentine sample (10 000 cells per sample). Lactate dehydrogenase activity ...
In this study, a fluorescence technique was developed for visualization of dentin using confocal laser scanning microscopy (CLSM). Eighteen extracted human teeth were used: 13 showing no clinical signs of caries and 5 with visually apparent decay. Preliminary study: All teeth were horizontally sectioned to approx. 200 micrometers thickness and pre-treated as follows: no pretreatment; vacuum only; ultrasonication only; sodium hypochlorite (NaOCl) only; vacuum and NaOCl; ultrasonication and NaOCl; or vacuum, ultrasonication and NaOCl. Samples were stained with Rhodamine 123 fluorescent dye at a concentration of 10-5 M in phosphate buffer saline for 1 to 24 hours. Caries study: Dentin surfaces, some with pre-existing caries, were visualized using CLSM. Most dentin tubules in sound dentin appeared open using CLSM, but most dentin tubules in carious dentin appeared closed or narrowed. Surface images obtained using CLSM were similar to those seen by SEM, but additional subsurface imaging was possible ...
Introduction: Oxidant bleaching agents may induce several alterations on mineralized teeth tissues. Our aim is to study, at the ultrastructural level, mechanical modifications induced on dentin after exposure to different bleaching agents. Methods: Nanoindentation performed with atomic force microscopy was used to measure changes in dentin stiffness as well as the adhesion force between the tip and the tissue both in intertubular and peritubular dentin. For each specimen, dentin localization, and bleaching agent, 100 independent nanoindentations were performed. Carbamide peroxide (30%) and hydrogen peroxide (35%) were used as bleaching agents. Results: A significant reduction of both stiffness and adhesion force was found for both carbamide and hydrogen peroxide in peritubular and intertubular dentin. Conclusions: The use of bleaching agents led to a significant reduction in dentin local (at the nanoscale) mechanical properties. ...
Dentin is a calcified tissue of the body. Dentin, enamel, cementum and pulp, are the four major components that make up the teeth. It is often covered by enamel on the crown and cementum of the root and surrounds the tooths pulp. Dentin is comprised of 45% hydroxylapatite, 33% organic material and 22% water. Dentin is yellow in its appearance and greatly affects the tooths color because of the enamels translucency. Dentin is less mineralized and less brittle in comparison to enamel. It is also necessary for the support of the enamel. Dentin has a score of 3 on the Mohs scale of mineral hardness. Dentin forms throughout life and is very sensitive.. Dentinal sclerosis or transparent dentin-sclerosis of primary dentin is the regressive alteration in teeth caused by the calcification of the dentinal tubules. It can occur as a result of cavities, an abrasion or as part of the normal aging process. ...
The influence of dentin permeability on transdentinal LED light propagation should be evaluated since this kind of phototherapy may further be clinically used to stimulate the metabolism of pulp cells, improving the healing of damaged pulps. This study evaluated the influence of the dentin permeability on the transdentinal LED light (630 nm) transmission. Forty-five 0.5-mm-thick dentin disks were prepared from the coronal dentin of extracted sound human molars. An initial measurement of transdentinal LED light transmission was carried out by illuminating the discs in the occlusal-to-pulpal direction onto a light power sensor to determine light attenuation. The discs were treated with EDTA for smear layer removal, subjected to analysis of hydraulic conductance, and a new measurement of transdentinal LED light transmission was taken. Spearmans correlation coefficient was used for analysis of data and showed a weak correlation between dentin permeability and light attenuation (coefficient = 0.19). ...
Microtensile bond strength was evaluated in two separate experiments, performed in two different laboratories, following the same bonding procedures and using same materials. The teeth were sectioned under water cooling coronally to remove occlusal enamel and to expose flat dentin surface, and at the dentin-enamel junction. Exposed dentin surface was ground with 180-grit abrasive paper to create uniform smear layer, and the teeth were randomly divided into two groups. In the control specimens, the adhesives were used as recommended by the manufacturer. Briefly, the dentin surface was first acid-etched with 37% phosphoric acid for 15 s, rinsed, and gently dried with compressed air to achieve slightly dry surface. Then water was scrubbed into the surface with cotton pellet for 30 s and gently dried, leaving the surface slightly moist, and 1-step etch-and-rinse adhesive Scotchbond 1XT was used as per manufacturers recommendations, and polymerized with 20 s blue light irradiation (Elipar Freelight ...
Dentin hypersensitivity is a painful response to a non-noxious stimulus applied to exposed dentin. Two processes may expose dentin: loss of enamel and/or loss of cementum. Loss of enamel occurs by attrition associated with occlusal function, by abrasion from dietary components or incorrect toothbrushing, or by erosion associated with environmental or dietary components, particularly acids. Exposure of root dentin is also multifactorial. Periodontal disease with gingival recession, some forms of periodontal surgery, and overzealous brushing are important etiological factors that expose root dentin. In addition, in some individuals the cementum and enamel do not meet, exposing an area of dentin. The management of this condition requires a good understanding of the complexity of the problem as well as the variety of treatments available. Some authors report that lasers may provide reliable and reproducible treatment of dentin hypersensitivity. One concern for laser safety is that the heat produced ...
TY - JOUR. T1 - Influence of NaOCl deproteinization on shear bond strength in function of dentin depth. AU - Toledano, Manuel. AU - Perdigão, Jorge. AU - Osorio, Estrella. AU - Osorio, Raquel. PY - 2002/8/1. Y1 - 2002/8/1. N2 - Purpose: To determine the influence of NaOCl application on shear bond strengths (SBS) to superficial and deep dentin, using Prime & Bond 2.1. Materials and Methods: Superficial and deep dentin was exposed in 40 extracted third molars by sectioning the occlusal surface immediately under the enamel-dentin junction or close to the pulp chamber. After polishing the dentin disks (600-grit SiC), they were assigned to two groups: (1) 36% orthophosphoric acid for 15 seconds, or (2): 36% orthophosphoric acid for 15 seconds followed by 5% sodium hypochlorite (NaOCl) for 2 minutes. The dentin adhesive was applied as per manufacturers instructions, followed by TPH resin-based composite. The specimens were stored in water for 24 hours at 37°C and thermocycled x500 and SBS were ...
PURPOSE: To evaluate microtensile bond strength and interfacial nanoleakage expression of adhesive interfaces created by XP-Bond on human deproteinized dentin immediately after bonding and after 6 months of artificial aging. MATERIALS AND METHODS: Noncarious human molars were selected, middle/deep dentin substrates were exposed, and either assigned to group 1 (XP-Bond applied on collagen-depleted dentin) or to group 2 (XP-Bond applied in accordance with manufacturers instructions). In group 1, the etched dentin surface was treated with 10% NaOCl for 60 s to remove the exposed demineralized organic matrix before XP-Bond application. Composite/dentin beams were obtained in accordance with the microtensile nontrimming technique and either pulled to failure after 24 h or after 6 months artificial aging. Data were analyzed with two-way ANOVA and Tukeys post-hoc test (p , 0.05). Interfacial nanoleakage evaluation was performed on additional adhesive interfaces to quantify the amount of silver ...
Dentin (/ˈdɛntɪn/) (American English) or dentine (/ˈdɛnˌtiːn/ or /ˌdɛnˈtiːn/) (British English) (Latin: substantia eburnea) is a calcified tissue of the body and, along with enamel, cementum, and pulp, is one of the four major components of teeth. It is usually covered by enamel on the crown and cementum on the root and surrounds the entire pulp. By weight, 45% of dentin consists of the mineral hydroxylapatite, 33% is organic material, and 22% is water. Yellow in appearance, it greatly affects the color of a tooth due to the translucency of enamel. Dentin, which is less mineralized and less brittle than enamel, is necessary for the support of enamel. Dentin rates approximately 3 on the Mohs scale of mineral hardness. Dentinal sclerosis/transparent dentin-sclerosis of primary dentin is regressive alteration in tooth characterized by calcification of dentinal tubules. It can occur as a result of injury to dentin by caries or abrasion, or as part of the normal aging process. The ...
TY - JOUR. T1 - In vitro evaluation of dentin tubule occlusion for novel calcium lactate phosphate (CLP) paste. AU - Yang, Jen Chang. AU - Hu, Hsin Tai. AU - Lee, Sheng Yang. AU - Hsieh, Sung Chih. AU - Huang, Pei Chi. AU - Ma, Chen Feng. AU - Ji, Dian Yu. AU - Chang, Liang Yu. AU - Teng, Nai Chia. PY - 2017. Y1 - 2017. N2 - Introduction: The objective of this in vitro study is to evaluate the effective and long-term occlusion of dentinal tubules using a novel calcium lactate phosphate (CLP) based desensitizing agent. Methods: Dentin disks (n = 9) were pre-etched using 1 M lactic acid for 30 s and individually treated with Colgate® Pro-Relief™ paste, CLP paste, and double distilled water (ddH2O) by a rubber-cupped handpiece. Dentin disks were analyzed under optical micrographs for pre-treatment, directly after treatment, and 14 days post-treatment. One-way ANOVA and post-hoc Tukeys test were used to determine whether there were any statistically significant differences in dentinal tubule ...
PubMed journal article Gene expression patterns of murine dentin matrix protein 1 (Dmp1) and dentin sialophosphoprotein (DSPP) suggest distinct developmental functions in viv were found in PRIME PubMed. Download Prime PubMed App to iPhone, iPad, or Android
The purpose of this study was to determine the uptake of fluoride by dentin after pulsed Nd:YAG laser irradiation. Under SEM examination dentin lased by pulsed Nd:YAG laser appeared to be melted; there were no changes of calcium and phosphorus levels. Dentin irradiated by pulsed Nd:YAG laser and treated with 38% Ag(NH3)2F showed greater uptake and deep penetration of fluoride than topical application of fluoride alone, SEM examination revealed that CaF2-like and Ag3PO4-like deposits were formed on the dentin surface. These results suggested that pulsed Nd:YAG laser irradition could improve the absorption of fluoride in dentin ...
Objectives: The purpose of this study was to evaluate the effects of load cycling on nanoleakage of occlusal flat surface or cervical restorations bonded with three self-etching priming systems and a single bottle system. Methods: The dentin bonding systems used in this study were Clearfil SE Bond, Unifil Bond, Prompt L-Pop and Single Bond. Flat occlusal dentin surfaces and cervical cavities from extracted human molars were bonded with one of the dentin bonding systems. After load cycling of 90N for 5000 cycles, samples were immersed in a 50% w/v solution of silver nitrate for 24h, and exposed to photodeveloping solution for 8h. Specimens were sectioned, mounted on stubs, carbon-coated and observed in a Field Emission-SEM using backscattered electron mode. One-way ANOVA was used for statistical analysis of the leakage scores. Results: FE-SEM images showed that samples subjected to load cycling had leakage patterns similar to non-load-cycled samples for all dentin bonding systems. Load cycling ...
Concentrations of calcium and phosphorus were measured in the neonatal dentine of 11 crabeater and 11 Weddell seal postcanine teeth with an energy-dispersive x-ray analyser. The extent of variation in elemental concentrations in different parts of the tooth, differences between species and individuals, and whether variation in elemental concentrations can provide information about dentine deposition mechanisms were assessed. No consistent patterns in elemental deposition in different parts of the tooth were found, but there were differences in concentrations between and within species. Post-natal dentine is composed of layers that appear alternately bright and dark in backscattered electron images. The elemental composition of neonatal dentine was closer to the dark bands than to those that appeared bright. It is suggested that the composition of neonatal dentine is more similar to the dark than the bright layers of dentine because of nutritional stresses that were occurring during mineral ...
Purpose: To examine the effects of collagenase and esterase activity on the microtensile bond strength and nanoleakage at the resin-dentin interfaces of two adhesive systems: a total-etch adhesive (Single Bond 2: SB) and a self-etch adhesive (Clearfil SE Bond: SE). Methods: Resin composites were bonded to the occlusal dentin surfaces of extracted human premolars with either SB or SE. The bonded teeth were sectioned into beams and assigned to one of four storage conditions: phosphate buffer solution (24 hours), phosphate buffer solution (4 weeks), collagenase solution (4 weeks), or esterase solution (4 weeks). Microtensile bond strength was evaluated and analyzed by two-way ANOVA. Failure mode was analyzed under SEM, and nanoleakage was examined with TEM. Results: The bond strength of SE was superior to that of SB after 4-week storage in three aqueous solutions. Collagenase and esterase solutions did not decrease the bond strength of SB any more than the phosphate buffer solution (P, 0.05). In ...
Aim: This study evaluated the influence of dentin wettability on the immediate and extended microtensile bond strength (mTBS) of a universal adhesive system used in the etch-and-rinse strategy. Methods: Twenty human third molars were selected and divided into four groups according to the adhesive system and dentin wettability. The mTBS values of each group were registered 24 h and one year after adhesive system application and resin composite block build-up (n=30). Data were analyzed by the t-test (p,0.05). Results: When both adhesive systems were compared, there was no statistically significant difference when they were applied following wet bonding (p,0.05). However, the dry bonding reduced μTBS values of the Adper Single Bond 2 adhesive (p,0.05). Regarding storage time, both groups presented similar μTBS values at 24 h and one year (p,0.05). Conclusions: Therefore, the Scotchbond Universal Adhesive can be applied to dry or wet dentin without compromising the etch-and-rinse bonding quality ...
TY - JOUR. T1 - Enamel and Dentin Bond Durability of Self-Adhesive Restorative Materials. AU - Latta, Mark A.. AU - Tsujimoto, Akimasa. AU - Takamizawa, Toshiki. AU - Barkmeier, Wayne W.. PY - 2020/1/1. Y1 - 2020/1/1. N2 - PURPOSE: To use shear bond strength (SBS) and shear fatigue strength (SFS) testing to determine the durability of adhesion of self-adhesive restorative materials compared to composite resin bonded with a universal adhesive. MATERIALS AND METHODS: A universal adhesive, Prime & Bond Active, was used in self-etch mode to bond Z-100 composite resin to enamel and dentin. Three commercially available restorative materials and one experimental material with self-adhesive properties, Activa (A), Fuji II LC(F), and Equia Forte (E) and ASAR-MP4 (S) were also bonded to enamel and dentin. The SBS and SFS were determined for all materials. A staircase method was used to determine the SFS with 10 Hz frequency for 50,000 cycles or until failure occurred. RESULTS: On enamel, S generated ...
This study compared the microtensile bond strength (BS) and the micromorphology of resin-dentin interface (MI) of a conventional adhesive to two-steps etch-and-rinse bonding agents after 1 year of water storage. Twenty-eight human third molars were used (n = 7). Teeth were divided into four groups (GCB: Gluma Comfort Bond; OPB: OptiBond FL; OCB: One Coat Bond SL; PUB: Peak Universal Bond). Specimens were tested in tension after 24 h or 1 year of water storage. Dentin BS strength data were analyzed by split-plot two-way ANOVA followed by Tukey-Kramer tests (α = 0.05). Water-storage for 1 year significantly decreased BS for OCB; however, no significant difference was noted between OCB and GCB and PUB adhesives after 1 year of water-storage. OPB showed the highest BS values at both storage times. All adhesives formed a hybrid layer with resin tags, and both interfacial structures were maintained after 1 year. However, degradation signals within interfacial structures were observed only for the adhesive
TY - JOUR. T1 - Shear bond strength of the Tenure Solution dentin bonding system.. AU - Barkmeier, Wayne W.. AU - Cooley, R. L.. PY - 1989/10. Y1 - 1989/10. N2 - A liquid solution of an oxalate bonding system containing NTG-GMA and PMDM has become commercially available. The bond strength of this oxalate adhesive (Tenure Solution) to dentin was determined by bonding composite resin cylinders to extracted teeth. The bond strengths obtained in this study are compared to the bond strengths obtained in earlier studies with the first and second generation oxalate adhesives whose components were supplied as powders and required mixing. The oxalate solutions developed significantly higher bond strengths than the original powder type systems.. AB - A liquid solution of an oxalate bonding system containing NTG-GMA and PMDM has become commercially available. The bond strength of this oxalate adhesive (Tenure Solution) to dentin was determined by bonding composite resin cylinders to extracted teeth. The ...
Objectives: To develop prototype rotary selective dentin caries excavators and to demonstrate their ability to remove only carious dentin in extracted teeth. Method and materials: Milled polymer prototype and formed wire loop prototype burs were made. They were tested on normal dentin with standardized force application and compared to carbide burs for ability to cut by weighing three extracted teeth at pre- and postcutting for each prototype version. They were tested on carious dentin of three teeth for each prototype version. The resulting excavated surfaces were analyzed with dentin caries dye, the teeth were decalcified and examined histologically, and the used prototypes were examined in light and scanning electron microscopes. Results: For both prototypes, noncarious teeth did not lose weight from prototype instrumentation, but each lost 9 or 10 mg after instrumentation with the control carbide bur. Both prototypes quickly removed carious dentin in each of the carious teeth until a ...
Objectives: This study was undertaken to examine the influence of partial demineralization of xenogenous dentin on bone formation in an osteoconductive environment. Materials and methods: Sixty dentin blocks, 2-3 mm thick and 4 mm in diameter, were prepared from developing teeth of young pigs. Forty blocks were demineralized in 24% ethylenediaminetetraacetic acid (pH 7.0) for 1, 2, 6 or 12 h. Forty adult rats divided into eight groups with five rats in each group were used. A sagittal midcranial incision was made from the occipital to the frontal region. Through a subperiostal dissection, a pocket was created on each side of the skull. One demineralized block was placed on one side, and a non-demineralized block was placed on the contralateral side, or the pocket was left empty as controls. Thus, eight experimental groups with five rats in each were formed. Results: Resorption increased significantly with increasing degree of demineralization while bone formation increased significantly with ...
Materials and Methods: Flat dentin surfaces from 50 primary molars were randomly assigned to 10 groups according to substrate (sound dentin [SD] vs caries-affected dentin [CAD] pH cycled for 14 days) and bonding approach (Scotchbond Universal Adhesive: self-etching, vs dry or wet-bonding etch-and-rinse strategies; Adper Single Bond Plus [two-step etch-and-rinse adhesive] and Clearfil SE Bond [two-step self-etching system] as controls). After 24 h of water storage, bonded sticks with cross-sectional areas of 0.8 mm2 were tested for microtensile bond strength (μTBS). Two sticks from each tooth were immersed in silver nitrate solution in order to evaluate nanoleakage (NL) with SEM. The μTBS means were analyzed using two-way ANOVA and Tukeys tests. For NL, the Kruskal-Wallis and Mann-Whitney tests were used (α = 0.05 ...
The dentinal tissue is made of tubules surrounded by peri-tubular dentin (PTD), embedded in a matrix of inter-tubular dentin (ITD). Hashin and Rosen found exact stiffness bounds for hexagonal patterns of hollow fibers. But State-of-the-Art micro-macro models rely on simplified microstructure representations and lack experimental validation. The Poissons ratios of dentin microstructure components cannot be determined by direct experimental methods. By contrast, we apply Hashins homogenization scheme to a non-uniform PTD distribution, determined from image analysis. According to Finite Element simulations, a cube containing 60 tubules is a Representative Elementary Volume. Microscopy, nanoindentation and Resonant Ultrasound Spectroscopy data were collected from each dentin sample studied for model calibration. Despite the high variability of microstructure descriptors and mechanical properties, statistical analyses show that Hashins bounds converge and that the proposed model can be used for ...
TY - JOUR. T1 - Micro-tensile bond strength of self-etching primer adhesive systems to human coronal carious dentin. AU - Doi, J.. AU - Itota, T.. AU - Torii, Y.. AU - Nakabo, S.. AU - Yoshiyama, M.. PY - 2004/10. Y1 - 2004/10. N2 - The aim of this study was to evaluate the micro-tensile bond strengths of three self-etching primer adhesive systems to normal dentin (ND), caries-affected dentin (CAD) and caries-infected dentin (CID). Human extracted molars with caries were used, and flat dentin surfaces ground by 600-grit SiC paper were prepared. The surfaces were dyed using Caries-Detector solution, treated with Clearfil SE Bond, Mac-Bond II and UniFil Bond, and then covered with resin composites according to manufacturers instructions. After immersion in 37°C water for 24 h, the teeth were serially sectioned into multiple slices. Each slice was distinguished into ND, CAD and CID groups by the degree of staining, and the bond strength was measured in a universal testing machine. Scanning ...
TY - JOUR. T1 - Effect of ammonium hexafluorosilicate on dentin tubule occlusion for the treatment of dentin hypersensitivity. AU - Suge, Toshiyuki. AU - Kawasaki, Akiko. AU - Ishikawa, Kunio. AU - Matsuo, Takashi. AU - Ebisu, Shigeyuki. PY - 2006/8. Y1 - 2006/8. N2 - Purpose: To evaluate the occluding ability of ammonium hexafluorosilicate (SiF). Methods: Dentin disks prepared from human extracted teeth were grouped as follows to prepare different situations of dentin hypersensitivity: (1) those sonicated for 20 minutes; (2) those treated with 0.5 mol/L EDTA for 2 minutes; (3) those treated with 6% citric acid for 2 minutes; (4) those treated with 50% citric acid for 2 minutes. Then, SiF or diamine silver fluoride (AgF) was applied to the dentin disks and the dentin tubule occlusion was observed with scanning electron microscopy (SEM). The percent of open tubules before and after SiF or AgF treatment were measured by NIH image using SEM photographs. Also, the dentin permeability was measured. ...
At-home treatments include desensitizing toothpastes or dentifrices, potassium salts, mouthwashes and chewing gums. A variety of toothpastes are marketed for dentin hypersensitivity, including compounds such as strontium chloride, strontium acetate, arginine, calcium carbonate, hydroxyapatite and calcium sodium phosphosilicate.[1] Desensitizing chewing gums[19] and mouthwashes are also marketed.[5] Potassium-containing toothpastes are common; however, the mechanism by which they may reduce hypersensitivity is unclear. Animal research has demonstrated that potassium ions placed in deep dentin cavities cause nerve depolarization and prevent re-polarization. It is not known if this effect would occur with the twice-daily, transient and small increase in potassium ions in saliva that brushing with potassium-containing toothpaste creates. In individuals with dentin hypersensitivity associated with exposed root surfaces, brushing twice daily with toothpaste containing 5% potassium nitrate for six to ...
The aim of this study is to investigate the morphological and chemical changes of demineralized dentin collagen-matrix and resin/dentin interface associated with chitosan/riboflavin modification. Dentin disc specimens were prepared from sound molars, acid-etched with 35% phosphoric acid and modified with either 0.1% riboflavin or chitosan/riboflavin (Ch/RF ratios 1:4 or 1:1) and photo-activated by UVA. Morphological and chemical changes associated with surface modification were characterized by SEM and micro-Raman spectroscopy. Dentin surfaces of sound molars were exposed, acid-etched, and modified as described before. Etch-and-rinse dentin adhesive was applied, light-cured, and layered with resin-restorative composite. The resin infiltration and resin/dentin interface were characterized by micro-Raman spectroscopy and SEM. An open-intact collagen network-structure, formation of uniform hybrid-layer and higher resin infiltration were found with 0.1%RF and Ch/RF 1:4 modifications. Raman analysis ...
The aim of this study was to evaluate the microtensile bond strength of two all-in-one self-etch adhesives applied to sound and caries-affected dentin with four different application techniques. Forty extracted third molars with occlusal caries were randomly divided into four groups for G-Aenial Bond and S3 Bond: (1) according to manufacturer-s instructions; (2) with acid etching before applying adhesives; (3) doubling adhesive application time; and (4) doubling adhesive coating. Teeth were sectioned to obtain 1-mm-+/- 0.2-mm-thick dentin sticks and subjected to a tensile force. For G-Aenial Bond, doubling the time and application of two consecutive coats produced significantly higher strength than that obtained by following manufacturers- instructions and acid etching application to sound dentin. Prior acid etching and application of two consecutive coats to caries-affected dentin generated significantly higher bond strength than that using other techniques. For S3 Bond, there was no ...
This study evaluated the MMP inhibition of the zinc oxide and copper nanoparticles (ZnO/CuNp), and the effects of their addition into adhesives on antimicrobial activity (AMA), ultimate tensile strength (UTS), in vitro degree of conversion (in vitro-DC), as well as, resin-dentin bond strength (μTBS), nanoleakage (NL) and in situ-DC on caries-affected dentin. Anti-MMP activity was evaluated for several MMPs. ZnO/CuNp (0% [control]; 5/0.1 and 5/0.2 wt%) were added into Prime&Bond Active (PBA) and Ambar Universal (AMB). The AMA was evaluated against Streptococcus mutans. UTS were tested after 24 h and 28d. After induced caries, adhesives and composite were applied to flat dentin surfaces, and specimens were sectioned to obtain resin-dentin sticks. μTBS, NL, in vitro-DC and in situ-DC were evaluated after 24 h. ANOVA and Tukeys test were applied (α = 0.05). ZnO/CuNp demonstrated anti-MMP activity (p < 0.05). The addition of ZnO/CuNp increased AMA and UTS (AMB; p < 0.05). UTS for PBA, in ...
This study aimed to characterize fluoride-induced alterations in dentin mineralization within a dentin-pulp organ culture system. Tooth sections derived from male Wistar rat incisors were cultured in Trowel-type culture for 14 days, in the presence of 0 mM, 1 mM, 3 mM and 6 mM sodium fluoride. Tooth sections were processed and analyzed for uptake of fluoride, its subsequent effect on dentin mineralization by tetracycline hydrochloride incorporation and mineral composition, expressed as calcium/phosphorous (Ca/P) ratios. Tetracycline hydrochloride incorporation was demonstrated to decrease with increased fluoride exposure, accompanied by significant increases in both Ca/P ratios and fluoride incorporation. These findings provide further evidence that the established alterations in dentin formation during fluorosis are a consequence of disruption to the mineralization process, and provide a model system with which to investigate further the potential role the extracellular matrix plays in inducing ...
High-temperature materials in service experience mechanical damage due to operating load and metallurgical damage due to operating temperature. When designing or assessing life of high-temperature components, must consider both factors. In this paper, the effect of tensile hold time on high-temperature fatigue crack growth and long-term prior thermal aging heat treatment on creep rupture behavior were investigated by using STS 316L and STS 316, austenitic stainless steels, which are widely used for automotive exhaust and piping of high-temperature component. STS 316L steel was tested for fatigue crack propagation test by applying 0 sec., 5 sec., 10 sec., 50 sec., and 100 sec. tensile hold times in trapezoidal waveform at 600°... and by using the prior aged STS 316, creep rupture tests were conducted under various stress conditions and at various temperatures. In high-temperature fatigue crack growth tests using STS 316L, as tensile hold time increased crack growth rate (da/dN) decreased in ...
0168]Continuous intrafibrillar and interfibrillar remineralization that occurred after 4 weeks are illustrated in FIG. 6. It was difficult to distinguish the remineralized dentin matrix from the underlying intact mineralized dentin using FESEM, except for the absence of peritubular dentin around the orifices of the dentinal tubules (FIG. 6A). FESEM analysis indicated that the remineralized dentin attained enough support to prevent it from collapse or shrinkage during high vacuum SEM examination. Peritubular dentin (open arrow) was absent from the superficial 5 μm of the dentinal tubules. At higher magnification, it was apparent that the majority of the collagen fibrils exhibited the corn-on-the-cob appearance (arrow), representative of interfibrillar mineralization, while other smaller diameter fibrils were devoid of interfibrillar minerals and exhibited only faint banding characteristics (open arrowhead) (FIG. 6B). Low magnification TEM showed that the partially remineralized dentin (open ...
Methodology Single-rooted human premolars were irrigated as follows (n = 12 per group): (1) 1% NaOCl during instrumentation, deionized water after instrumentation, (2) 1% NaOCl during, 17% EDTA after instrumentation, (3) a 1 : 1-mixture of 2% NaOCl and 18% EA during and after instrumentation, and (4) 1% NaOCl during, 2.25% PA after instrumentation. Irrigant volumes and contact times were 10 mL/15 min during and 5 mL/3 min after instrumentation. The evaluated outcomes were eluted calcium by atomic absorption spectroscopy, smear-covered areas by scanning electron microscopy in secondary electron mode and apparent canal wall decalcifications on root transsections in backscatter mode. For the smear layer analysis, sclerotic dentine was taken into consideration. Results were compared using appropriate parametric and nonparametric tests, alpha = 0.05 ...
MTA와 dentin 사이의 계면 결합력을 평가하기 위해 dentin 시편에 MTA를 충전시킨 후 전단강도를 측정하였으며 7개의 단근치와 5개의 다근치의 root 부위를 실험에 이용하였다. 지름 10mm의 플라스틱 mold에 치아 root를 2mm 길이로 절단하여 매몰하고 이를 직경 1.3mm의 diamond bur로 dentin의 canal을 따라 2mm의 depth로 삭제하였다. 원기둥형으로 치아삭제를 하여 20개의 시편을 제작하였고 이 중에서 실험에 적합한 18개의 시편을 선택하였다. 총 24개의 canal에 MTA(ProRoot MTA, Dentsply, Tulsadental, Tulsa, OK, USA)를 증류수, 1.0%, 2.0% chlorhexidine의 3개의 group으로 분류하여 충전하였다. LF-Plus digital testing machine (Lloyd instrument, Ametek)을 이용하여 1mm/min의 속도로 시편에 dislodgement force를 가하였고 MTA부분이 dentin으로부터 분리될 때의 load를 측정했다. SPSS ver. 19.0K를 이용했고, 유의수준(p-value) 0.05를 ...
Host-derived proteases have been reported to degrade the collagen matrix of incompletely-resinin-filtrated dentin. This study tested the hypothesis that interfacial degradation of resin-dentin bonds may be prevented or delayed by the application of chlorhexidine (CHX), a matrix metalloproteinase inhibitor, to dentin after phosphoric acid-etching. Contralateral pairs of resin-bonded Class I restorations in non-carious third molars were kept under intra-oral function for 14 months. Preservation of resin-dentin bonds was assessed by microtensile bond strength tests and TEM examination. In vivo bond strength remained stable in the CHX-treated specimens, while bond strength decreased significantly in control teeth. Resin-infiltrated dentin in CHX-treated specimens exhibited normal structural integrity of the collagen network. Conversely, progressive disintegration of the fibrillar network was identified in control specimens. Auto-degradation of collagen matrices can occur in resin-infiltrated dentin, ...
Dentinogenesis imperfecta (DI) type II, an inherited disorder affecting dentin, has been linked to mutations in the dentin sialophosphoprotein ( DSPP) gene on chromosome 4q21. The gene product is cleaved into two dentin-specific matrix proteins, dentin sialoprotein (DSP) and dentin phosphoprotein. The aim of this investigation was to study genotypes and phenotypes in two affected families with special reference to clinical, radiographic, and histopathologic manifestations. Seven affected members of Family A and five of Family B were documented clinically and radiographically; 14 and 10 teeth, respectively, were available for histopathologic investigation and prepared for ground sections, which were assessed semiquantitatively for dysplastic manifestations in the dentin according to the scoring system, dysplastic dentin score (DDS). Venous blood samples were collected from six affected and ten unaffected members of Family A, and from eight affected and six unaffected members of Family B. Genomic ...
ABSTRACT. Aim: To evaluate the comparative efficacy of Polymer bur (Smartprep) and Conventional burs (Carbide bur & Diamond Points) in selective Dentin caries removal. Materials and method: 15 freshly extracted carious human premolars and molars were selected for this study. These teeth were split in the center of carious lesion, in order to obtain two corresponding half. Thus 30 samples were prepared in this way. These were randomly divided in to 3 groups of 10 samples each. Group 1: The carious portion of these samples was excavated with the help of polymer bur Smartprep (SS White). Group 3: Prepared with Tungsten carbide round bur (No. 018). Group 3: Prepared with the help of Diamond points (No. 018). The period of time involved in this process is measured. After excavation of all carious lesions, a longitudinal section from mid most part of lesion was obtain with the help of diamond disc at slow speed. After staining with caries detector dye Seek, the sections were subjected to ...
Dentin matrix protein 1 (DMP1) is an acidic extracellular matrix phosphoprotein that can bind calcium. DMP1 is required for bone and dentin mineralization and is expressed in the cells of bone and teeth. It is thought to play a role in regulating expression of osteoblast-specific genes during osteoblast cell differentiation and is localized to the nucleus in osteoblast precursor cells. In mature osteoblasts, the DMP1 protein is phosphorylated and localized to the extracellular matrix, where it plays a role in forming mineralized matrix. While other constitutively expressed proteins in the extracellular matrix, such as osteopontin and osteocalcin, are expressed in osteoblast cells, DMP1 is expressed in osteocytes, making it a candidate biomarker for osteocyte activity.. ...
Dentin matrix protein 1 (DMP1) is an acidic extracellular matrix phosphoprotein that can bind calcium. DMP1 is required for bone and dentin mineralization and is expressed in the cells of bone and teeth. It is thought to play a role in regulating expression of osteoblast-specific genes during osteoblast cell differentiation and is localized to the nucleus in osteoblast precursor cells. In mature osteoblasts, the DMP1 protein is phosphorylated and localized to the extracellular matrix, where it plays a role in forming mineralized matrix. While other constitutively expressed proteins in the extracellular matrix, such as osteopontin and osteocalcin, are expressed in osteoblast cells, DMP1 is expressed in osteocytes, making it a candidate biomarker for osteocyte activity.. ...
Dentin Sensitivity; Dentin Hypersensitivity. On-line free medical diagnosis assistant. Ranked list of possible diseases from either several symptoms or a full patient history. A similarity measure between symptoms and diseases is provided.
BackgroundLight curing of resin composite is associated with a thermal rise that may have harmful effect on the health of the vital pulp. In addition, desirable polymerization is important to achieve mechanical properties and clinical function. The purpose of this in‑vitro study was to compare the thermal rise under normal dentin during photopolymerization and degree of conversion (DC) of bulk fill and conventional resin composite using continuous high‑ and soft‑start mode.Materials and MethodsIn this in‑vitro study, Cl I cavities with a dimension of 4 mm × 4 mm × 4 mm and remaining dentin thickness of 1 mm were prepared on 56 extracted human molars. The temperature rise during the light curing of conventional resin composite (Tetric N Ceram, Ivoclar Vivadent) by incremental filling technique and bulk‑fill resin composite (Tetric N Ceram Bulk Fill, Ivoclar Vivadent) by bulk‑filling technique were measured with a K‑type thermocouple wire. DC of both resin composites was measured
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The aim of the present study was to evaluate the influence different bleaching agents and concentrations on microtensile bond strength of different dentin adhesives in class V cavities. 135 freshly extracted third molars were included in this study. In all teeth cervical class V dentinal cavities were prepared allowing the simulation of dentin perfusion. The specimens were randomly assigned to nine experimental groups of fifteen each: S0: Syntac/ control; S17: Syntac/ Perfect Bleach 17%; S38: Syntac/ Opalescene Xtra Boost 38%; X0: XP Bond/ control; X17: XP Bond/ Perfect Bleach 17%; X38: XP Bond/ Opalescene Xtra Boost 38%; A0: AdheSE One/ control; A17: AdheSE One/ Perfect Bleach 17%; A38: AdheSE One/ Opalescene Xtra Boost 38%. Bleaching was performed 8 hours at 36°C for 7 days. Between the ranges all samples were stored in physiological saline for 16 hours. The dentin adhesives used as recommended by manufactures instruction were applied on a standardized dentin surface. Microtensile bond ...
Objective: The purpose of this in vitro study was to determine the microtensile bond strengths (µTBS) of 3 dental adhesives when applied to dentin decalcified with ethylenediaminetetraacetic acid (EDTA). The null hypothesis tested was that the removal of calcium from dentin would not influence the bond strengths. Method and materials: Eighteen extracted human molars were cut in 2 equal halves. One half served as the control, having no EDTA treatment, while the other half was assigned to 1 of 3 periods (1 hour, 24 hours, or 100 hours) of decalcificatioin with buffered 0.5 mol/L EDTA. Middle dentin was bonded with 1 of 3 dentin adhesive groups: a self-etching primer, Clearfil SE Bond (SE); an acetone-based total-etch adhesive, Prime&Bond NT (NT); and an ethanol- and water-based total-etch adhesive, Single Bond (SB). The specimens were restored with Z-250 resin composite and sectioned in 0.9 ± 0.2 mm2 sticks that were tested in tensile mode. Results: For each adhesive, the control group (not ...
Fig. (2d) SEM micrograph of the top surface of dentin disc in the BIF-CA Group: The dentin surface was covered with a semi-porous layer (2,000X). ...
Dentin is one of the most durable biological materials in the human body. Researchers from Charité - Universitätsmedizin Berlin were able to show that the reason for this can be traced to its nanostructures and specifically to the interactions between the organic and inorganic components. Measurements performed at BESSYII, the Helmholtz-Zentrum Berlins synchrotron radiation source, showed that it is the mechanical coupling between the collagen protein fibers and mineral nanoparticles which renders dentin capable of withstanding extreme forces. Results from this research have been recently published in the journal Chemistry of Materials*.. In humans, teeth come into contact almost 5,000 times per day under normal use. In spite of this, and although we often use large forces during mastication, it is surprisingly rare for healthy teeth to break. It is widely accepted that the design of teeth makes teeth tough, where an inner core, known as dentin, supports the outer hard enamel cap. The secret ...
TY - JOUR. T1 - Thermo-debonding mechanisms in dentin bonding systems using finite element analysis. AU - Lee, Sheng Yang. AU - Chiang, Hsin Chih. AU - Huang, Haw Ming. AU - Shih, Yung Hsun. AU - Chen, Hsin Chung. AU - Dong, De Rei. AU - Lin, Che Tong. N1 - 被引用次數:24 Export Date: 9 August 2016 CODEN: BIMAD 通訊地址: Lee, S.-Y.; Grad. Inst. Oral Rehabilitation Sci., Taipei Medical College, 250 Wu-Hsing Street, Taipei, Taiwan; 電子郵件: [email protected] 化學物質/CAS: Biocompatible Materials; Dentin-Bonding Agents; Optibond; Resin Cements; Scotchbond Multi-Purpose 商標: Clearfil Protect liner, Kuraray, Japan; Dentin; Hybrid layer; Optibond; Scotchbond MP; Tenure; Z100 製造商: Kuraray, Japan 參考文獻: Van Noort, R., Cardew, G.E., Howard, I.C., A study of the interfacial shear and tensile stresses in a restored molar tooth (1988) J Dent, 16, pp. 286-293; Van Noort, R., Noroozi, S., Howard, I.C., Cardew, G.E., A critique of bond strength measurements (1989) J ...
Tooth sensitivity or known as dentin hypersensitivity is short or transient sharp pain of a rapid onset that arises from exposed dentin layer of one or more teeth subsequent to loss of tooth structure (enamel layer of the crown or cementum layer of the root). It usually occurs in response to stimuli-typically cold, air pressure, drying, sugar, acids, chemicals or forces acting onto the tooth-and cannot be ascribed to any other dental defects or pathology. These stimuli are non-noxious, and are not generally expected to generate a pain response, except as seen in sensitive teeth. In contrast, a noxious stimulus would be the toxins of bacteria within a decay lesion leading to dentinal pain. Areas of exposed dentin at the junction between the crown and the root (cervical area) account for much of the observed tooth sensitivity. Continue reading →. ...
Inaugural-Dissertation (Dr. med. dent.). Marginale Adaptation & Verschleissfestigkeit experimenteller CEREC - Porzellaninlays in vitro (Arbeit unter der Leitung von PD Dr. med. dent. I. Krejci).. Publikationsübersicht. Marending M, Lutz F, Barbakow F. Scanning electron microscope appearances of Lightspeed instruments used clinically: a pilot study. International Endodontic Journal (1998) 31, 57-62.. Marending M, Peters OA, Zehnder M. Factors affecting the outcome of orthograde root canal therapy in a general dentistry hospital practice. Oral Surg Oral Med Oral Pathol Oral Radiol Endod (2005) 99, 119-24.. Marending M, Brunner T, Luder H, Stark WJ, Zehnder M. Effect of sodium hypochlorite on human root dentine - mechanical, chemical and morphological evaluation. International Endodontic Journal (2007) 40, 786-793.. Marending M, Paqué F, Fischer J, Zehnder M. Impact of irrigant sequence on mechanical properties of human root dentin. Journal of Endodontics (2007) 33, 1325-1328.. Marending M, ...
OBJECTIVES: This study aimed to analyse the erosion-inhibiting potential of a single application of stannous chloride-containing fluoride solution on pellicle-covered enamel and dentine under constant acid flow conditions in vitro. DESIGN: Bovine enamel (n=60) and dentine (n=60) samples were exposed 1h to the oral cavity of 4 healthy volunteers to allow for in situ pellicle formation. Pellicle-covered samples were randomly assigned to three groups (each n=20 enamel and n=20 dentine samples; 5 enamel and 5 dentine samples/volunteer) and treated once with a SnCl2/AmF/NaF (800 ppm Sn(II), 500 ppm F, pH 4.5) or a NaF solution (500 ppm F, pH 4.5) for 2 min or remained untreated (controls). Samples were eroded with hydrochloric acid (pH 2.6) in a small erosion chamber at 60 microl/min for 25 min. Calcium release into the acid was monitored in consecutive 30s intervals for 5 min, then at 1 min intervals up to a total erosion time of 25 min using the Arsenazo III procedure. Data were statistically ...
Here we present a novel method which allows the measurement of the stable isotope ratios of carbon (δ13C) and nitrogen (δ15N) from much smaller samples of dentine than previously possible without affecting the quality parameters. The reconstruction of the diet of past populations using isotopic analysis of bone collagen is a well-established tool. However, because of remodelling of bone throughout life, this gives a blurred picture of the diet. The analysis of δ13C and δ15N from tiny increments of dentine utilizes tissue that does not remodel and permits comparison, at the same age, of those who survived infancy with those who did not at high temporal resolution. This new method has been tested on archaeological teeth from two sites: three molar teeth from the 19th Century Kilkenny Union Workhouse Famine cemetery, Ireland; and three from the Anglian (5-7th centuries AD) cemetery at West Heslerton, Yorkshire, England, selected on the basis of their varied preservation. The methods of ...
TY - JOUR. T1 - Dentin bonding--state of the art 1999.. AU - Perdigao, Jorge. AU - Lopes, M.. PY - 1999/12. Y1 - 1999/12. N2 - The adhesion of restorative materials to the hard components of tooth structure has been a goal pursued by many researchers ever since Buonocore established the foundation for adhesive and preventive dentistry. Based on the industrial use of phosphoric acid to obtain better adhesion of paints and resin coatings to metal surfaces, Buonocore proposed that phosphoric acid could be used to transform the surface of enamel to render it more receptive to adhesion. Subsequent research indicated that the formation of taglike resin prolongations into the enamel microporosities was the leading bonding mechanism of resin to phosphoric acid-etched enamel. The enamel bonding agents of the 1960s and 1970s progressively evolved into complex multibottle or universal adhesives in the early 1990s, which were designed to bond to enamel, dentin, composite, amalgam, porcelain, and ...
Micromechanical and chemical retention of ceramic fixed prosthesis to tooth structure introduced minimal invasive preparation to dentistry. As a result, biomechanically or aesthetically compromised teeth can be restored at a lower biological price, saving sound tooth tissues. A slow but steady (mind) shift from full metal and metal-ceramic restorations that require conventional cementation and substantial tooth loss (Edelhoff en Sorensen, 2002) to less destructive partial all ceramic restorations that require adhesive cementation is seen in the clinical field.. The clinical success of ceramic restorations relies heavily on the quality of their adhesion to dentin, which remains a clinical challenge to date. Improvements in this field over the years have brought about better cements and more effective methods to condition both substrates and teeth.. Immediate Dentin Sealing (IDS) is a technique that presumably improves adhesion of ceramic fixed prosthesis to tooth structure which results in a ...
The purpose of this study was to evaluate the influence of surface treatments and thermocycling on the microtensile bond strength (μTBS) of self-adhesive resin cement to human enamel and dentin. Eighty human third molars were selected. The crowns of 40 teeth were transversally sectioned, exposing the mid-coronal dentin. The buccal surfaces of the other 40 teeth were grinded to obtain a 5 mm2 flat enamel area. Eighty resin blocks were produced and cemented to the dental surfaces with RelyX Unicem, then grouped according to the surface treatment (n = 10): UnicemC with no conditioning, UnicemP with 37% phosphoric acid/15 s, and UnicemPA with 37% phosphoric acid/15 s plus adhesive bonding (Single Bond 2). There were two control groups, one for enamel and the other for dentin: VR with 37% phosphoric acid/15 s plus adhesive bonding (Single Bond 2) plus Variolink II. The enamel-dentin resin cement blocks were sectioned to produce non-trimmed bar specimens, which were divided into two storage ...
The experimental set-up is schematically presented in Fig. 1 . Non-carious and non-restored human third molars (gathered following informed consent approved by the Commission for Medical Ethics of KU Leuven) were stored in 0.5% chloramine in water at 4 °C and used within 1 month after extraction. Ninety-five teeth, 5 teeth per group, were mounted in gypsum blocks in order to facilitate manipulation. For the dentin specimens, the occlusal third of the molar crowns was removed by means of a water-cooled slow-speed diamond saw (Isomet 1000, Buehler, Lake Bluff, IL, USA). A standard smear layer was produced by removing a thin layer of the surface using a water-cooled, high-speed medium-grit diamond bur (842, Komet, Lemgo, Germany) mounted in a custom-adapted MicroSpecimen Former (BUR-CUT; thick and compact smear layer) or using 600-grit silicon-carbide paper under running water (SiC-GROUND; thin smear layer; solely in SubProject 2). For the enamel specimens (solely in SubProject 2), lingual and ...
Sealer cements are an essential component of root-filling materials to fill any voids and gaps between the main root-filling material and root dentin.
DentinDentin dysplasia • Dentine bonding agents • Dentine hypersensitivity • Dentinogenesis • Dentinogenesis imperfecta • ... Radioactive dentin abrasion • Ragas Dental College • Raman Bedi • Randy Starr • Ranula • Receding gums • Reduced enamel ...
2003). "The Effect of Potassium Nitrate and Silica Dentifrice in the Surface of Dentin". Japanese Journal of Conservative ... R. Orchardson & D. G. Gillam (2006). "Managing dentin hypersensitivity" (PDF). Journal of the American Dental Association. 137 ...
This condition is a type of dentin dysplasia that causes teeth to be discolored (most often a blue-gray or yellow-brown color) ... Thotakura SR, Mah T, Srinivasan R, Takagi Y, Veis A, George A (2000). "The noncollagenous dentin matrix proteins are involved ... Sometimes odontoblasts are seen in dentin. Type I and II have similar radiographic features Total obliteration of the pulp ... Also called hereditary opalescent dentin. Type III: Brandywine isolate. This type is rare with occurrences only in the secluded ...
Twenty dentin disks were cut from human extracted third molars. The dentin surface of the disks was etched with 6% citric acid ... 1991) assessed the influence of a smear layer on the adhesion of sealer cements to dentin. A total of 120 teeth was tested, 40 ... In vitro the penetration of bacteria into tubules of intact dentin exposed by fracture was compared in pairs of teeth, one of ... However this barrier seemed to be removed after a few days which allowed bacterial growth into intact dentin. Olgart came to a ...
Enamel-Dentin-Pulp fractures extend through the enamel and dentin and into the pulp. If the pulp is vital, a focal spot of ... Enamel-Dentin crown fractures typically present as a tooth fracture confined to enamel and dentin with loss of tooth structure ... enamel-dentin fractures, and fractures that extend through the enamel and dentin into the pulp which are defined below. Crown ... "Enamel-dentin fracture - Dental Trauma Guide". Retrieved 2018-11-15. Services, Department of Health & ...
Lines of Retzius (think age bands like tree growth rings) - Stria (A) artifacts in enamel (not found in dentin) created by ... these lines appear near the dentin. They bend obliquely near the cervical region. They curve occlusally near the cuspal regions ... incremental steps of ameloblasts comparable to the contour "lines of Owen" in dentin have increased organic content and show ...
Odontoblast process run in the canaliculi that transverse the dentin layer and are referred as dentinal tubules. The number and ... Dentin v t e v t e. ...
doi:10.1046/j.0305-182X.2003.01230.x. Cunha-Cruz, J.; Stout, J. R.; Heaton, L. J.; Wataha, J. C. (29 December 2010). "Dentin ... Like many oxalates, ferric oxalate has been investigated as a short term treatment for dentin hypersensitivity. It is used in ...
Odontoblasts (dentin-producing cells) of the teeth. Around the optic vesicle and the developing eye and contributes to many eye ... "In vitro odontoblast-like cell differentiation of cranial neural crest cells induced by fibroblast growth factor 8 and dentin ...
There is tentative evidence for dentin hypersensitivity. It does not appear to be useful for orthodontic pain LLLT might be ... Sgolastra, F.; Petrucci, A.; Severino, M.; Gatto, R.; Monaco, A. (2013-06-01). "Lasers for the treatment of dentin ...
Secondary dentin is darker and more opaque than primary dentin. This gives the dentin an overall darker appearance. At the same ... The underlying dentin layer is darker than enamel, yellow-brown in color, and less transparent. Dentin forms the bulk of the ... The pulp is pink/red due to its vascularity, but is rarely visible through the overlying enamel and dentin unless the thickness ... Dentinogenesis imperfecta is a defect of dentin formation, and the teeth may be discolored yellow-brown, deep amber or blue- ...
Petersson, LG (Mar 2013). "The role of fluoride in the preventive management of dentin hypersensitivity and root caries". Clin ... Petersson, Lars G. (28 December 2012). "The role of fluoride in the preventive management of dentin hypersensitivity and root ... Dental caries Fluoride therapy Xerostomia Dental fluorosis Dentin hypersensitivity Dental restoration Dental surgery Weintraub ... "Treating cervical dentin hypersensitivity with fluoride varnish". The Journal of the American Dental Association. 137 (7): 1013 ...
"Antimicrobial substantivity of alexidine and chlorhexidine in dentin". J Endod. 39 (11): 1413-5. doi:10.1016/j.joen.2013.07.038 ...
Stroud, J L; Buschang, P H; Goaz, P W (August 1994). "Sexual dimorphism in mesiodistal dentin and enamel thickness". ...
This is in contrast to dentin formation which occurs throughout life (secondary dentin production). Ameloblast Amelogenesis ... Dentin must be present for enamel to be formed. Ameloblasts must also be present for dentinogenesis to continue. A message is ... At this time, the dentin is not mineralized. The IEE cuboidal or low columnar with centralized nuclei and poorly developed ... When this first layer is formed, the ameloblasts move away from the interface with dentin, allowing for the development of ...
On the contrary, if the dentin cylinders are irrigated with 17% EDTA either alone, or following NaOCl treatment, a dentin ... pulp fibroblasts and other niche cells in dental pulp and dentin regeneration. To ensure the success of dental pulp and dentin ... The ultimate goal of REPS is to regenerate the tissues and the normal function of the dentin-pulp complex. Before this ... Apexification, stimulates cells in the periapical area of the tooth to form a dentin-like substance over the apex. Both improve ...
... partly fused with dentin 3) Embedded: entirely surrounded by dentin Pulp stones are discrete calcifications found in the pulp ... They are classified: A) On the basis of structure 1) True pulp stones: formed of dentin by odontoblasts 2) False pulp stones: ... Several genetic diseases such as dentin dysplasia and dentinogenesis imperfecta are also accompanied by pulpal calcifications ... "Comparative Physicochemical Analysis of Pulp Stone and Dentin" (PDF). Journal of Endodontics. 42 (3): 432-8. doi:10.1016/j.joen ...
... a histo-anatomic dentin layer mimicking the dentin shape of the dentition of the patient and an enamel layer. These ... This implies that the histo-anatomic dentin core is the key to esthetic crowns. Zirconia is the hardest known ceramic in ... In the subtle cooperation between the dentin-colored zirconia and the veneering porcelain, the zirconia shines through the ... Yang, An; Lamichhane, Aashwini; Xu, Chun (2016). "Remaining Coronal Dentin and Risk of Fiber-Reinforced Composite Post-Core ...
The dermal skeleton is just surface dentin and basal bone, which is sometimes overlaid by enameloid. It is thought that the ... One of the studies involving mineralized tissues in dentistry is on the mineral phase of dentin in order to understand its ... Teeth were first seen in chondrichthyans and were made from all three components of the dermal skeleton, namely dentin, basal ... Kruzic J.J. & R.O. Ritchie (2007). "Fatigue of mineralized tissues: Cortical bone and dentin" (PDF). Mechanical Behavior of ...
... and form the matrix of the dentin. They are often the first sign of dentin formation. They are 0.1 to 0.2 µm in diameter and ...
Once reparative dentin forms, odontoblasts associated with the dentin change, and the pulpal fibroblasts lose p75 expression, ... dentinal cracks and exposed dentin. Exposed dentin gives the microorganisms access to the pulp of the tooth through the ... As caries invades dentin, the number of permeable dentinal tubules correlates with the degree of pain. Intrapulp pressure have ... Pulpitis may be caused by bacteria from dental caries that penetrate through the enamel and dentin to reach the pulp, or it may ...
The removed enamel is irreplaceable, and may sometimes expose dentin. It is also known as enameloplasty, odontoplasty, ...
"Acid-etching and Hydration Influence on Dentin Roughness and Wettability". Journal of Dental Research. 78 (9): 1554-1559. doi: ...
Wear-resistant, they were held together with cementum and dentin. A mammoth's molars were replaced five times over the animal's ...
Dentin, less mineralized and less brittle, 3-4 in hardness, compensates for enamel and is necessary as a support. On ... When dentin, which normally supports enamel, is destroyed by a physiologic condition or by decay, enamel is unable to ... Frequently, the purpose of removal is to gain access to the underlying decay in the dentin or inflammation in the pulp. This is ... At the edges of teeth where there is no dentin underlying the enamel, the color sometimes has a slightly blue or translucent ...
SDF hardens carious dentin, such that it is twice as hard as healthy dentin Colony Forming Unit counts (CFU) and studies of ... were significant lower in both dentin surfaces and demineralized dentin treated with SDF when compared to water application. ... Duangthip D, Jiang M, Chu CH, Lo EC (April 2015). "Non-surgical treatment of dentin caries in preschool children--systematic ... Silver and Fluoride ions possess antimicrobial properties and are used in the remineralization of enamel and dentin on teeth ...
Secondary dentin is a layer of dentin produced after root formation and continues to form with age. Tertiary dentin is created ... Dentin, which is less mineralized and less brittle, compensates for enamel and is necessary as a support. Unlike dentin and ... Dentin has microscopic channels, called dentinal tubules, which radiate outward through the dentin from the pulp cavity to the ... Along the border between the dentin and the pulp are odontoblasts, which initiate the formation of dentin. Other cells in the ...
... begins initially in the enamel, causing it to become thin, and can progress into dentin, giving the tooth a dull ... This pain is due to the enamel having been eroded away, exposing the sensitive dentin. Based on the optical changes induced in ... This occurs because the white enamel has eroded away to reveal the yellowish dentin beneath. On top of clinical examination, ... Guignon, Anne (September 2013). "Dental Erosion: An Increasingly Common Cause of Dentin Hypersensitivity" (PDF). Colgate Dental ...
Brady, J. M.; Clarke-Martin, J. A. (1990). "Penetration of etched enamel and dentin cavity surfaces by bonding agent/composite ... The processes involved include them creating ''stress shielding'' by increasing the compliance of enamel next to the dentin. ... "Indentation damage and mechanical properties of human enamel and dentin". Journal of Dental Research. 77 (3): 472-480. doi: ...
This exposed the softer dentin and intensified the wear process. Pipe holes develop after five to ten years of intensive ... It was possible to remove uncontaminated dentin from a molar and isolate fragments of mitochondrial DNA from it. Mitochondrial ...
Secondary dentin is a layer of dentin produced after the root of the tooth is completely formed. Tertiary dentin is created in ... Thus, interglobular dentin is slightly less mineralized than globular dentin. Interglobular dentin is especially evident in ... Below it lies the circumpulpal dentin, more mineralized dentin which makes up most of the dentin layer and is secreted after ... The outer layer closest to enamel is known as mantle dentin. This layer is unique to the rest of primary dentin. Mantle dentin ...
Dentin hypersensitivity (DH, DHS) is dental pain which is sharp in character and of short duration, arising from exposed dentin ... Over time, the dentin-pulp complex may adapt to the decreased insulation by laying down tertiary dentin, thereby increasing the ... Therefore, although the terms dentin sensitivity and sensitive dentin are used interchangeably to refer to dental ... dentin hypersensitivity is not a true form of allodynia or hyperalgesia. To contradict this view, not all exposed dentin ...
In humans, other mammals, and the elasmobranch fishes (e.g., sharks, rays), a layer of dentin-producing ... Dentin, in anatomy, the yellowish tissue that makes up the bulk of all teeth. It is harder than bone but softer than enamel and ... Secondary dentin, a less well-organized form of tubular dentin, is produced throughout life as a patching material where ... Though more efficient nutritionally, this type of dentin is softer and less resistant to disease than tubular dentin. The ...
*dentine* The bony material that forms the bulk of a tooth [1]. Dentine is similar in composition to bone but is perforated with many tiny canals for nerve fibres, blood capillaries, and processes of the dentine-forming cells (odontoblasts [2]).
Dentin definition, the hard, calcareous tissue, similar to but denser than bone, that forms the major portion of a tooth, ... OTHER WORDS FROM dentin. den·tin·al, adjective. Words nearby dentin. dentigerous cyst, dentil, dentilabial, dentil band, ... dentin. *. The effect is to cause the surface exposed to dentin to oxidize more than tin would do alone; in that there is a ... Still, it can easily be renewed, or if all the tin is removed we find the dentin hard and firm. ...
Definition of interglobular dentin. Provided by Stedmans medical dictionary and Includes medical terms and ...
Transparent dentin definition at, a free online dictionary with pronunciation, synonyms and translation. Look it ...
The dentin that forms inside the primary dentin is called secondary dentin. This type of dentin continues to grow throughout ... The dentin that forms when a tooth erupts is called primary dentin and, unlike enamel, dentin does have the capability for ... Although dentin is a hard tissue, it does have elastic properties that support the enamel layer above it. Dentin includes the ... The third type of dentin, called reparative dentin, is formed as a response to attrition, erosion or some irritation such as a ...
Tertiary dentin (including reparative dentin or sclerotic dentin) - pathologicEdit. Tertiary dentin is dentin formed as a ... Primary dentinEdit. Primary dentin, the most prominent dentin in the tooth, lies between the enamel and the pulp chamber (near ... There are three types of dentin, primary, secondary and tertiary.[13][14] Secondary dentin is a layer of dentin produced after ... Secondary dentinEdit. Secondary dentin(adventitious dentin) is formed after root formation is complete, normally after the ...
... dentin sialoprotein and dentin phosphoprotein. In teeth, dentin sialophosphoprotein is expressed primarily by odontoblast cells ... Dentin sialoprotein and dentin phosphoprotein overexpression during amelogenesis.. Paine ML1, Luo W, Wang HJ, Bringas P Jr, ... Using a transgenic animal approach we have extended dentin sialoprotein or dentin phosphoprotein expression throughout the ... These data support the previous suggestion that dentin sialoprotein and dentin phosphoprotein have distinct functions related ...
One reason IDS is stronger is that dentin bonds best to composite when the dentin is freshly cut, Dr. Magne said. Provisional ... Dentin sealing technique gains momentum. By Laird Harrison, Senior Editor. December 16, 2008 -- The approach contradicts what ... "Pascal will tell you that the only time you can get excellent bond strength to dentin is the day that you prepped it," Dr. ... If you can keep that tooth clean and refreshen the dentin at cementation, you will be able to produce that exact bond." ...
Developing an effective adhesive bond to dentin is more difficult due to the chemical and biological... ... components o f dentin. Dentin bonding agents provide the most appropriate conditions for bonding o f composite resins to acid ... Developing an effective adhesive bond to dentin is more difficult due to the chemical and biological complexity o f dentin. ... Classification of Dentin Bonding Agents. Jozo Šutalo ; School of Dental Medicine, University of Zagreb, Zagreb, Croatia Branka ...
Amplifying Wnt signaling in the pulp stimulates dentin secretion, and in the dentin injury model, we show that a liposomal ... new dentin formed. By PID28, (J) µCT sections show that a dentin bridge separates the injury site from the pulp (arrow). (K) ... a dentin injury. ALP activity shown in (J) an intact molar (green dotted line indicates the coronal dentin) versus PID3 ... which secreted dentin throughout the life of the animal, were responsible for depositing new dentin in response to a ...
Denture Excavators Restorative Carious Dentin Decay Cav... Denture Excavators Restorative Carious Dentin Decay Cav... ...
Instant and Lasting Relief Effects of Strontium Chloride/Potassium Nitrate Dentifrice on Dentin Hypersensitivity. *Dentine ... Caries Arrest of Teeth Measured by Change in Dentin Texture (Soft, Hard) ...
Biodentine™ is a dentin substitute indicated for use in the crown for temporary enamel restorations, permanent dentin ... Reactionary dentin genesis for pulp vitality preservation. *Natural micromechanical anchorage for excellent sealing properties ...
S. C. N. Lai, Y. F. Mak, G. S. P. Cheung et al., "Reversal of compromised bonding to oxidized etched dentin," Journal of Dental ... Sodium Hypochlorite Irrigation and Its Effect on Bond Strength to Dentin. Tariq S. Abuhaimed1 and Ensanya A. Abou Neel1,2,3 ... H. Ari, E. Yaşar, and S. Bellí, "Effects of NaOCl on bond strengths of resin cements to root canal dentin," Journal of ... C. Prati, S. Chersoni, and D. H. Pashley, "Effect of removal of surface collagen fibrils on resin-dentin bonding," Dental ...
Dentin sialophosphoprotein. Dentin sialophosphoprotein (Dentin matrix protein 3, DMP-3) [Cleaved into: Dentin phosphoprotein ( ... Dentin sialophosphoproteinImported. ,p>Information which has been imported from another database using automatic procedures.,/p ... tr,E9Q9Z9,E9Q9Z9_MOUSE Dentin sialophosphoprotein OS=Mus musculus OX=10090 GN=Dspp PE=1 SV=1 ...
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Comparision of different conditioners and its effect on human dentin and on Light Activated Glass Ionomer Cements. Product ... 1. Dentin conditioners : Bond strength of light activated glass Ionomer with different conditioners on human dentin Shashirekha ... Titel: Dentin conditioners. Verlag: LAP Lambert Academic Publishing Dez 2012. Erscheinungsdatum: 2012. Einband: Taschenbuch. ... Dentin conditioners. Shashirekha Govind. Verlag: LAP Lambert Academic Publishing Dez 2012, 2012 ...
Its function is presumed to be protective, as it lowers dentin permeability. However, it masks the underlying dentin and ... Effectiveness of Arginin and Potassium Nitrate Dentifrices in Dentin Hypersensitivity Therapy. Introduction: Dentin ... Adherent debris produced when cutting the enamel or dentin in cavity preparation. It is about 1 micron thick and its ... After the teeth isolation with cotton rolls, changes in the dentin sensitivity to tactile (dental explorer), thermal stimuli ( ...
This study characterized the percentage of dentin-like... ... 6). CD146+ cells had formed thick dentin-like and dentin/pulp- ... Dentin-like structures on H-E images were surrounded by dotted lines, and the percentage of dentin-like structures area (DSA) ... Generation of dentin/pulp-like structures in vivo. The ability to generate dentin/pulp-like structures was compared among CD146 ... Immunohistochemical studies detected dentin matrix protein-1 (DMP1) and dentin sialophosphoprotein (DSPP), as well as human ...
Treating cervical dentin hypersensitivity with fluoride varnish: a randomized clinical study. definition of Dentine ... Dentin Sensitivity. Immune System Diseases. Tooth Diseases. Stomatognathic Diseases. Fluorides. Fluorides, Topical. Cariostatic ... The aim of this study was to assess the effect of CPP-ACP combined with fluoride varnish in cervical dentin hypersensitivity ... Tooth Mousse and Fluoride in Dentin Hypersensitivity Treatment. This study has been completed. ...
... By Laird Harrison, Senior Editor. April 3, 2008 -- Lasers offer many ... Even the Er:YAG lasers have been found to slightly denature dentin to a depth of 5 micrometers to 15 micrometers. But ER,Cr: ... Measuring the heat on the opposite side of the dentin slice -- the side that would touch pulp in a living tooth -- the ... Barros group is doing further research to see if various etches remove the denatured layers of dentin, exposing a surface that ...
BAC incorporation decreased the 24 h SBS to normal dentin (. ), increased the 24 h SBS to eroded dentin (. ), and had no effect ... 0.05). SBS was significantly lower to artificially eroded dentin than to normal dentin (. ). Storage for 1 year had no effect ... on SBS to normal dentin but led to a significant decrease in SBS to artificially eroded dentin (. ). ... Long-Term Bond Strength of Two Benzalkonium Chloride-Modified Adhesive Systems to Eroded Dentin. Simon Flury, Adrian Lussi, and ...
Adhesion Tooth Crown Luting Immediate Dentin Sealing Other: Immediate Dentin Sealing or Delayed Dentin Sealing Not Applicable ... Other: Immediate Dentin Sealing or Delayed Dentin Sealing The main difference between the IDS and DDS technique lies in the ... Immediate and Delayed Dentin Sealing Effect on Partial Crowns. The safety and scientific validity of this study is the ... Immediate Dentin Sealing as an adjunct to adhesive cementation of all ceramic restorations is proposed and executed in several ...
launches UNO Gel for dentin hypersensitivity in collaboration with Germiphene Corporation. Email Print Friendly Share ... UNO Gel provides rapid and long-lasting relief from dentin hypersensitivity, a common dental complaint that can significantly ... "The bioactive polymer used in UNO forms a rapid, protective, dentin integrated layer to prevent hypersensitivity", said Dr. ...
It is suggested to move a blunt exploratory probe in the mesiodistal (or distomesial) direction on the exposed dentin [12, 15 ... Miglani S, Aggarwal V, Ahuja B (2010) Dentin hypersensitivity: recent trends in management. J Conserv Dent 13:218-224PubMed ... Dentin hypersensitivity (DHS) is characterized by a sharp, short-lasting "dentinal" pain originating from pulpal tissues in a ... The results of a PubMed search reveal that many more publications focus on the therapy of dentin (hyper)sensitivity than on ...
What is primary dentin? Meaning of primary dentin as a legal term. What does primary dentin mean in law? ... Definition of primary dentin in the Legal Dictionary - by Free online English dictionary and encyclopedia. ... Related to primary dentin: circumpulpal dentin. PRIMARY. That which is first or principal; as primary evidence, or that ... In the immediate evaluation, values obtained for primary dentin were lower than those of permanent dentin. ...
  • the tooth crown is covered instead with vitrodentin , a compound related to dentin, which is harder than dentin but somewhat softer than enamel. (
  • Dentinal sclerosis/transparent dentin-sclerosis of primary dentin is regressive alteration in tooth characterized by calcification of dentinal tubules. (
  • Dentin is derived from the dental papilla of the tooth germ. (
  • After growth of predentin and maturation into dentin, the cell bodies of the odontoblasts remain in the pulp inside the tooth, along its outer wall, and project into tiny tubules in the dentin. (
  • Dentin continues to form throughout life and can be initiated in response to stimuli, such as tooth decay or attrition. (
  • Because of dentinal tubules, dentin has a degree of permeability, which can increase the sensation of pain and the rate of tooth decay. (
  • The bulk of a tooth is made up of dentin. (
  • These data support the previous suggestion that dentin sialoprotein and dentin phosphoprotein have distinct functions related to tooth formation, and that the dentino-enamel junction should be viewed as a unique transition zone between enamel and the underlying dentin. (
  • If you can keep that tooth clean and refreshen the dentin at cementation, you will be able to produce that exact bond. (
  • Wnt-Responsive Odontoblasts Secrete New Dentin after Superficial Tooth Injury. (
  • The objective of our experiments was to identify new therapeutic strategies to stimulate dentin formation in an adult tooth. (
  • GC Tooth Mousse, a complex containing amorphous calcium phosphate (ACP) and casein phosphopeptide (CPP), is recommended in dentin hypersensitivity reduction due to its ability to block opened dentinal tubules. (
  • The present in situ study investigated the influence of a preparation containing CPP/ACP (caseinphosphopeptide-amorphous calcium phosphate) (GC Tooth mousse) on initial bacterial colonization of enamel and dentin. (
  • Measuring the heat on the opposite side of the dentin slice -- the side that would touch pulp in a living tooth -- the researchers found that in group three, it reached almost 14 degrees Celsius. (
  • A slow but steady (mind) shift from full metal and metal-ceramic restorations that require conventional cementation and substantial tooth loss (Edelhoff en Sorensen, 2002) to less destructive partial all ceramic restorations that require adhesive cementation is seen in the clinical field. (
  • Immediate Dentin Sealing (IDS) is a technique that presumably improves adhesion of ceramic fixed prosthesis to tooth structure which results in a better marginal adaptation to dentin and less postoperative sensitivity compared to conventional adhesive cementation, also referred to as Delayed Dentin Sealing (DDS). (
  • Dentin is the most voluminous tissue of the tooth and its formation (dentinogenesis) is a highly regulated process displaying several similarities with osteogenesis. (
  • A tooth is a complex organ that is composed of calcified tissues (dentin, enamel, and cementum) and soft connective tissues (the dental pulp and the periodontal ligaments) in which blood vessels and nerves are protected. (
  • A method and system for attaching, for example, an artificial dental prosthetic device such as a crown, cap, or bridge to a prepared tooth structure utilizes a fluoride releasing dentin bonding system in combination with a cement layer. (
  • The dentin bonding system is first applied to the prepared tooth structure, the dentin bonding system including a primer layer and a VLC microfill composite resin layer in certain embodiments. (
  • Then the artificial prosthetic device (e.g. crown) is removably adhered to the prepared tooth structure and the dentin bonding system by way of the cement (e.g. zinc oxide based type). (
  • The cement layer sandwiched between the attached device and the dentin bonding system has a shear function less than that of the device and the dentin bonding system but sufficient to permanently bond the device to the tooth and dentin bonding system during masticatory functions and demands, thereby permitting the device to be removed or sheared from the tooth (and dentin bonding system) without destroying either. (
  • You can use it to bond direct and indirect restorations to all tooth surfaces, seal crown preps, assist with core build-ups, and act as a relief agent for patients with dentin hypersensitivity. (
  • The process whose specific outcome is the progression of a dentin-containing tooth over time, from its formation to the mature structure. (
  • Dentin region of a human tooth with canals or dentinal tubules (dental canaliculi), coloured scanning electron micrograph (SEM). (
  • Dentin is mineralized connective tissue below the tooth enamel surface. (
  • The visible part of a tooth (the crown) consists of enamel covered dentin. (
  • It is indicated for treatment of exposed dentin , for use after prophylaxis or scaling and root planing, and before and/or after tooth bleaching. (
  • Recession itself is a condition that predisposes a person to root caries--cavities--due to decay of the exposed dentin on the root of the tooth. (
  • Rather than simply filling a hole, the implants stimulate stem cells to encourage the growth of dentin - the bony material that makes up the majority of the tooth, Newsweek reported. (
  • A decline in pH and dissolution of the inorganic content of the dental tissues are followed by exposure of the organic portion of the tooth, which, in dentin, is largely composed of collagen fibres. (
  • The similarity of bone to tooth structure in their organic and inorganic composition offers a good prospect of the application of CO 3 Ap for regeneration of dentin and pulp tissue repair. (
  • Therefore, we investigated the role of CRAMP and FPR2 in tooth development, reparative dentin formation, and defense response. (
  • The present study was performed to investigate the mineral density distribution in enamel and dentin for both permanent and primary teeth and to establish the standard density per tooth type using micro-computed tomography (CT). (
  • Cubic regression curves were used to determine the mineral density distribution in the enamel and dentin for each tooth type. (
  • The mean mineral density values for permanent enamel and dentin were significantly higher than those for their primary counterparts for each tooth type. (
  • In the present study, we demonstrated the distribution of mineral density in sound enamel and dentin and attempted to determine the standard mineral density for each tooth type using micro-CT. (
  • As the highly volatile liquids, ether and chloroform, evaporate a certain amount of heat is abstracted from the tooth-structure, and a coating of the zinc chloride, alkaloidal cocaine, or menthol, driven to all remedies will not completely desensitize all dentin, but their use will be a material aid. (
  • As dentin is the majority of the tooth it is important to maintain the protective enamel layer that covers it. (
  • [5] Others suggest that due to the presence of patent dentinal tubules in areas of hypersensitive dentin, there may be increased irritation to the pulp, causing a degree of reversible inflammation. (
  • A few animals, such as flounder and cod , have vasodentin, in which tubules are lacking, and the dentin is nourished directly by capillaries. (
  • Dentin consists of microscopic channels, called dentinal tubules, which radiate outward through the dentin from the pulp to the exterior cementum or enamel border. (
  • From the outer surface of the dentin to the area nearest the pulp, these tubules follow an S-shaped path. (
  • The dentinal tubules contain the cytoplasmic extensions of odontoblasts that once formed the dentin and maintain it. (
  • When an injury is superficial, as in the case of a dentin injury model, then disturbances are largely confined to pulp tissue immediately underneath the damaged dentin tubules. (
  • Amplifying Wnt signaling in the pulp stimulates dentin secretion, and in the dentin injury model, we show that a liposomal formulation of human WNT3A protein passes through dentinal tubules and is capable of upregulating Wnt signaling in the pulp. (
  • The dentin tubules (seen in cross section) have been formed by cytoplasmic extensions of the odontoblasts (dentin-producing cells). (
  • Occluding agents act by physically covering or "plugging" the open, exposed dentin tubules, thus preventing the effect of thermal changes or physical stimuli caused by the movement of dentin fluid resulting from pressure changes. (
  • There has been recent concern about the inadvertent exposure of dentin with patent tubules as well as gingiva to bleaching systems containing 10-15% carbamide peroxide or 2-10% hydrogen peroxide for more than a few minutes. (
  • Most dentin tubules in sound dentin appeared open using CLSM, but most dentin tubules in carious dentin appeared closed or narrowed. (
  • Microscopically this shows a markedly irregular secondary dentin characterized by a definite diminution of dentinal tubules, with an increased amount of dentin matrix. (
  • In areas where both primary and secondary mineralization have occurred with complete crystalline fusion, these appear as lighter rounded areas on a stained section of dentin and are considered globular dentin. (
  • Overexpression of dentin sialoprotein results in an increased rate of enamel mineralization, however, the enamel morphology is not significantly altered. (
  • CD146 + cells may promote mineralization and generate dentin/pulp-like structures, suggesting a role in self-renewal of stem cells and dental pulp regenerative therapy. (
  • DMP1 is required for bone and dentin mineralization and is expressed in the cells of bone and teeth. (
  • Bevelander, G. and Nakahara, H. (1965), Correlation between tetracycline binding and mineralization in dentin and enamel. (
  • During dentin formation, there are three components that are necessary for proper mineralization, namely, collagen which forms a scaffold, noncollagenous proteins that can specifically bind to the collagen template and function as a mineral nucleator and crystalline calcium phosphate deposited in an ordered manner. (
  • Here we demonstrate by in situ hybridization techniques that the noncollagenous dentin matrix proteins 1, 2 (DMP1, 2) and dentin sialoprotein (DSP) have characteristic temporal and spatial expression patterns within odontogenic tissues during dentin mineralization. (
  • Expression of the SIBLINGs was originally thought to be limited to bone and teeth where they function to facilitate dentin and bone matrix mineralization [1] - [3] . (
  • Finally, if you seal the dentin before making the impression, the impression includes the contours of the adhesive. (
  • Developing an effective adhesive bond to dentin is more difficult due to the chemical and biological complexity o f dentin. (
  • Many techniques and means have been developed with the purpose to adhesive chemical bond o f composite resin to organic and anorganic components o f dentin. (
  • S. E. M. Saber and F. S. El-Askary, "The outcome of immediate or delayed application of a single-step self-etch adhesive to coronal dentin following the application of different endodontic irrigants," Eur J Dent , vol. 3, pp. 83-89, 2009. (
  • Effect of green tea extract on bonding durability of an etch-and-rinse adhesive system to caries-affected dentin," Journal of Applied Oral Science , vol. 24, no. 3, pp. 211-217, 2016. (
  • Immediate Dentin Sealing as an adjunct to adhesive cementation of all ceramic restorations is proposed and executed in several studies, but there is very limited evidence to support its effectiveness. (
  • Although several studies have evaluated the immediate bond strength of simplified adhesive systems to permanent and primary dentin , the results obtained are still controversial. (
  • Do the origins of primary teeth affect the bond strength of a self-etching adhesive system to dentin? (
  • We evaluated the influence of protease inhibitors on the bond strength of a self-etch adhesive system to caries-affected dentin. (
  • Bond strength test is crucial for evaluation of dentin-adhesive effectiveness and for informing the design of adhesive systems. (
  • For the dentin-adhesive interface, this type of test can be applied to not only access the tensile behavior but also behavior under complex combined normal and shear loading conditions. (
  • The new adhesive showed a degree of double bond conversion and mechanical properties comparable with control, with good penetration into the dentin surface and a uniform adhesive/dentin interface. (
  • Prime-Dent One-Step Dentin/Enamel Bonding Adhesive, 7 mL Bottle. (
  • Non-dentin layer is covered by enamel or cementum and gingiva. (
  • Dentin (/ˈdɛntɪn/) (American English) or dentine (/ˈdɛnˌtiːn/ or /ˌdɛnˈtiːn/) (British English) (Latin: substantia eburnea) is a calcified tissue of the body and, along with enamel, cementum, and pulp, is one of the four major components of teeth. (
  • Dentin without the enamel or cementum that normally covers it. (
  • A degree of dentin sensitivity is normal, but pain is not usually experienced in everyday activities like drinking a cooled drink. (
  • Therefore, although the terms dentin sensitivity and sensitive dentin are used interchangeably to refer to dental hypersensitivity, [5] the latter term is the most accurate. (
  • After the teeth isolation with cotton rolls, changes in the dentin sensitivity to tactile (dental explorer), thermal stimuli (drops of melted ice) and air stimuli (blast from dental syringe) will be evaluated. (
  • It is presumed that IDS both reduces postoperative sensitivity and increases the bond strength to dentin as compared to DDS. (
  • The results of a PubMed search reveal that many more publications focus on the therapy of dentin (hyper)sensitivity than on diagnostic aspects. (
  • It is made up, by weight, of 72% inorganic materials (mainly hydroxylapatite and some non-crystalline amorphous calcium phosphate), 20% organic materials (90% of which is collagen type 1 and the remaining 10% ground substance, which includes dentin-specific proteins), and 8% water (which is adsorbed on the surface of the minerals or between the crystals). (
  • Even at the lowest setting, the ablation may weaken bond strength by denaturing collagen in dentin, she said. (
  • Control beams were not exposed to PA but were incubated in simulated body fluid for 3 days to assay their total endogenous telopeptidase activity, by their ability to solubilize C-terminal crosslinked telopeptides ICTP and CTX from insoluble dentin collagen. (
  • Objective To evaluate the effect of dentin matrix metalloproteinase(MMP) on the degradation of root dentin collagen. (
  • CONCLSUION:The K + and acetic acid have synergetic effect on the solubility of root dentin collagen. (
  • Objective The purpose of this study was to evaluate the effect of degradation of human root dentin collagen treated with collagenase after demineralization. (
  • Measurements performed at BESSYII, the Helmholtz-Zentrum Berlin's synchrotron radiation source, showed that it is the mechanical coupling between the collagen protein fibers and mineral nanoparticles which renders dentin capable of withstanding extreme forces. (
  • Dentin is a bone-like substance, which is composed of mineral nanoparticles, collagen and water. (
  • In control defects collagen matrix alone failed to form complete dentin bridges. (
  • Dentin sialoprotein and dentin phosphoprotein overexpression during amelogenesis. (
  • The gene for dentin sialophosphoprotein produces a single protein that is post-translationally modified to generate two distinct extracellular proteins: dentin sialoprotein and dentin phosphoprotein. (
  • Using a transgenic animal approach we have extended dentin sialoprotein or dentin phosphoprotein expression throughout the developmental stages of amelogenesis. (
  • In wild-type animals, the inclusion of dentin sialoprotein in the forming aprismatic enamel may account for its increased hardness properties, when compared with bulk enamel. (
  • Western blot analysis of the supernatants revealed that MMP-3 released from the dentin matrix small proteoglycans (decorin and biglycan) and dentin sialoprotein (DSP) in the AmF, sodium fluoride, PBS and placebo pretreated groups, but not in the GSE and mouthrinse pretreated groups. (
  • We have isolated a 3.8-kb DNA fragment containing the 5' flanking region, 1st exon, and 1st intron of the rat dentin sialoprotein (rDsp) gene and produced transgenic mice carrying a LacZ reporter gene under the control of this fragment. (
  • Other members of the family are bone sialoprotein (BSP), dentin matrix protein 1 (DMP1), dentin sialophosphoprotein (DSPP), osteopontin (OPN), and matrix extracellular phosphoglycoprotein (MEPE) [1] . (
  • In teeth, dentin sialophosphoprotein is expressed primarily by odontoblast cells, but is also transiently expressed by presecretory ameloblasts. (
  • Because of this expression profile it appears that dentin sialophosphoprotein contributes to the early events of amelogenesis, and in particular to those events that result in the formation of the dentino-enamel junction and the adjacent "aprismatic" enamel. (
  • Immunohistochemical studies detected dentin matrix protein-1 (DMP1) and dentin sialophosphoprotein (DSPP), as well as human mitochondria, in transplanted DPSCs. (
  • We determined recently that dentin sialophosphoprotein (DSPP), a member of the SIBLING (Small integrin-binding ligand N-linked glycoproteins) family of phosphoglycoproteins, is highly upregulated in human oral squamous cell carcinomas (OSCCs) where upregulation is associated with tumor aggressiveness. (
  • Dentin sialophosphoprotein (DSPP) is a member of the SIBLING (Small Integrin-Binding LIgand N-linked Glycoprotein) family of extracellular matrix glycophosphoproteins [1] . (
  • Dentin , also spelled dentine , in anatomy , the yellowish tissue that makes up the bulk of all teeth . (
  • In the study, both DPSCs and BM-MSCs that were transplanted into immunocompromised mice successfully generated either dentin/pulp-like structures or bone tissue-like structures. (
  • TY - JOUR T1 - Differential expression patterns of the dentin matrix proteins during mineralized tissue formation. (
  • Dentin consists of inorganic hard tissue and organic dentin matrix components (DMCs). (
  • Fractured teeth in the early stages of maturation, consisting of 40-50% hard tissue, have much higher ability to continue dentin deposition despite chronic pulp inflammation. (
  • By comparison, teeth in the second year of life consist of more then 60% hard tissue, have a lower ability to survive, and significantly decreased dentin production. (
  • In hOP-1 treated teeth substantial amounts of hard tissue formation (osteodentin and tubular dentin) had consistently led to a complete bridging of the defects. (
  • Researchers have found that hydrogen peroxide - the active ingredient in over-the-counter whitening strips - can damage the protein-rich dentin tissue found beneath the tooth's protective enamel. (
  • Standardized blocks of dentin obtained from sound permanent teeth extracted for orthodontic reasons were demineralized with Ethylenediaminetetraacetic acid (EDTA) and pretreated either with (A) GSE (0.2% w/v), (B) amine fluoride (AmF) (20% w/v), (C) a mouthrinse which contains both, (D) placebo, (E) sodium fluoride (0.15 −1 ), (F) PBS, (G) Chlorhexidine digluconate (CHX), or (H) zinc chloride (ZnCl 2 ). (
  • S. Hergüner Siso, K. Er, F. Hürmüzlü, A. Kustarci i K.E. Akpinar, "Fracture Resistance of Root-Filled Maxillary Premolar Teeth Restored with Current Dentin Bonding Adhesives", Acta stomatologica Croatica , vol.42, br. (
  • Objective: The aim was to study and compare the fracture resistance of root-filled premolar teeth restored with various dentin bonding adhesives (DBAs). (
  • 13 In endodontics, however, there is no standard solution for testing bioceramic materials, or any studies that determine what would be the best solution for in vitro simulation of natural dentin moisture in vivo for endodontically treated teeth. (
  • It is widely accepted that the design of teeth makes teeth tough, where an inner core, known as dentin, supports the outer hard enamel cap. (
  • Materials and methods: Sixty dentin blocks, 2-3 mm thick and 4 mm in diameter, were prepared from developing teeth of young pigs. (
  • After the teeth were embedded and sectioned (400 m), the caries in the remaining dentin was assessed using a caries detector. (
  • The first group including 3 dogs 11 months old in which we fractured all third incisors, canines, fourth premolars and third upper molars (84 teeth together), showed by the F-test, significantly different results in pulp vitality resulting in dentin production compared with second group. (
  • Human teeth were embedded in acrylic resin and then polished until the dentin surface became exposed. (
  • Two layers of carious dentin from extracted human teeth were observed with an electron microscope. (
  • The enamel and dentin mineral densities in the extracted teeth were measured using micro-CT. (
  • The problem of the desensitization of the dentin of teeth comes to the forefront from time to time. (
  • In cases where cavities have been prepared in vital teeth under conduction anesthesia, or for a jacket crown, the exposed dentin is generally hypersensitive after the anesthesia disappears. (
  • We describe a step-by-step method of performing direct pulp capping on mice teeth for the evaluation of pulpal wound healing and reparative dentin formation in vivo . (
  • This evaluation indicates that 93% of the test teeth gave evidence of dentin sclerosis beneath the area of calcium hydroxide base material while 99% of the control teeth showed no radiographic evidence of dentin sclerosis. (
  • The control teeth showed an increased dentin density range of from 0% to 20% immediately beneath the alloy restoration. (
  • From the results of this research it is apparent that a calcium hydroxide methyl cellulose base material is effective in the production of sclerotic dentin in deciduous teeth. (
  • secondly, dentin is sensitive and can become hypersensitive to changes in temperatur due to the sensory function of odontoblasts, especially when enamel recedes and dentin channels become exposed. (
  • The formation of dentin, known as dentinogenesis, begins prior to the formation of enamel and is initiated by the odontoblasts of the pulp. (
  • The cell bodies of the odontoblasts are aligned along the inner aspect of dentin against a layer of predentin where they also form the peripheral boundary of the dental pulp. (
  • R26R mTmG/+ reporter strain was then used to demonstrate that a population of long-lived Wnt-responsive odontoblasts, which secreted dentin throughout the life of the animal, were responsible for depositing new dentin in response to a superficial injury. (
  • DMP1, DMP2 and DSP mRNA are expressed in the odontoblasts at specific and overlapping time points and are thus presumably used for different functions during dentin formation. (
  • Expression of the transgene transcript and beta-galactosidase activity were restricted to dentin and odontoblasts with spatial and temporal patterns comparable to those of the endogenous mouse Dsp transcript, although beta-galactosidase activity could not be detected visually during embryonal stages. (
  • Dentin-forming cells, odontoblasts, which originate from the ectomesenchyme, form a single layer of cells between the dentin and pulp. (
  • Our findings indicate that protein S100-A7 released from dentin by MMP20 might play a key role in dentin pulp regeneration. (
  • 6 There exists a rich cocktail of bioactive molecules in dentin and pulp capable of giving the signaling events involved in dentin and pulp regeneration. (
  • Dentin matrix protein 1 (DMP1) is an acidic extracellular matrix phosphoprotein that can bind calcium. (
  • Anti-Dentin Matrix Protein-I antibody is a rabbit polyclonal antibody raised against the KLH-conjugated peptide (90-111) derived from the N-terminus of rat DMP1. (
  • Dentin matrix protein 1 (DMP1) has been known for a number of years to bind to CD44 and ArgGlyAsp sequence-dependent integrins. (
  • Dentin matrix protein 1 (DMP1) is an acidic phosphoglycoprotein and member of the integrin-binding SIBLING protein family ( 1 ). (
  • To understand the mechanism of radiotherapy-induced dental lesions characterized by shear fracture of enamel near the dentin-enamel junction (DEJ) that suggests decreased interface stability. (
  • What is enamel-dentin-pulp fracture and how is it treated? (
  • Fracture involves enamel and dentin and the pulp is exposed. (
  • Discussion: how can we improve diagnosis of dentin hypersensitivity in the dental office? (
  • Current diagnosis of dentin hypersensitivity in the dental office: an overview. (
  • OBJECTIVES: The aim of this overview is to consider the problems that may be associated with making a diagnosis of dentin hypersensitivity (DHS) and to provide a basis for clinicians to effectively diagnose and manage this troublesome clinical condition. (
  • Kowalczyk A, Botuliński B, Jaworska M, Kierklo A, Pawińska M, Dabrowska E. Evaluation of the product based on Recaldent technology in the treatment of dentin hypersensitivity. (
  • Objective: Dentin desensitizing agents are used in the treatment of dentin hypersensitivity, which is defined as a painful response in the exposed dentin to stimuli that are thermal, evaporative, tactile, osmotic, or chemical. (
  • This study determined if dentin proteases are denatured by phosphoric acid (PA) used in etch-and-rinse dentin adhesives. (
  • This is the peer reviewed version of the following article: Park, J.-G., Ye, Q., Topp, E. M. and Spencer, P. (2009), Enzyme-catalyzed hydrolysis of dentin adhesives containing a new urethane-based trimethacrylate monomer. (
  • A new trimethacrylate monomer with urethane-linked groups, 1,1,1-tri-[4-(methacryloxyethylamino-carbonyloxy)-phenyl]ethane (MPE), was synthesized, characterized, and used as a co-monomer in dentin adhesives. (
  • Biodentine™ is a dentin substitute indicated for use in the crown for temporary enamel restorations, permanent dentin restorations, deep or large carious lesions, deep cervical or radicular lesions, pulp capping or pulpotomy. (
  • Cervical dentin hypersensitivity (CDH) and noncarious cervical lesions (NCCLs) are common findings in modern clinical practice. (
  • Those older than 80 years have more root caries needing more intensified caries-controlling measures and a higher prevalence of untreated dentin lesions often in need of operative treatment. (
  • Next, we investigated the localization of CRAMP, FPR2, and CD68-positive macrophages by immunohistochemical analysis during pulp inflammation and reparative dentin formation after cavity preparation. (
  • At subsequent stages of reparative dentin formation, CRAMP was observed in odontoblast-like cells that contacted reparative dentin. (
  • Localization of CRAMP and its receptor FPR2-positive cells were observed during physiological and reparative dentin formation. (
  • CRAMP/LL-37 has a possibility that induce reparative dentin formation. (
  • By volume, 45% of dentin consists of the mineral hydroxyapatite, 33% is organic material, and 22% is water. (
  • We synthetized dentin-like scaffolds using gelatin biomineralized with magnesium-doped hydroxyapatite and blended it with alginate. (
  • 2 These new composites generally contain bioactive glasses capable of releasing ionic species and forming a precipitate, hydroxyapatite, allowing for better sealing by inducing dentin remineralization, in addition to inhibiting microbial biofilm formation. (
  • While both enamel and dentine are composed of the same mineral called carbonated hydroxyapatite (cHAP), dentin represents a complex nanocomposite material. (
  • In his latest paper ( Journal of Prosthetic Dentistry , September 2007, Vol. 98:3, pp. 166-174), Dr. Magne and his colleagues prepared 30 extracted human molars and immediately bonded their dentin: 15 with OptiBond FL ( Kerr Dental ) and 15 with SE Bond ( Kuraray ). (
  • For comparison purposes, they placed Tempfil Inlays on 10 molars without bonding the dentin first, and soaked these in saline solution for two weeks before using either OptiBond FL or SE Bond to attach the Z100. (
  • Extracted human molars were bonded and prepared for microtensile dentin bond strength (microTBS) testing using Prompt L-Pop, EBS Multi, and Prime&Bond NT combined with Pertac II (composite) or Hytac Aplitip (compomer). (
  • Therefore, pellicle formation was performed in situ on bovine enamel and dentin specimens fixed to individual upper jaw splints worn by 8 subjects. (
  • Objectives: This study was undertaken to examine the influence of partial demineralization of xenogenous dentin on bone formation in an osteoconductive environment. (
  • In this study, the CO 3 Ap cement is used to cover an exposed dental pulp in rats and histological evaluation was carried out to evaluate the formation of reparative dentin, which is one of the signs of positive pulp capping treatment outcome. (
  • The Evaluation of formation of reparative dentin was done in 3 weeks after application by histological observation. (
  • The formation of reparative dentin was observable in 3 weeks of evaluation. (
  • It was the aim of the present study to investigate the induction of dentin formation by recombinant human osteogenic protein-1 (hOP-1). (
  • Less dentin formation was seen after calcium hydroxide application. (
  • The effect of halogens in the monomer, and the tracer on the bonding, the formation of the acid-proof dentin layer, viscosity and wetting were investigated. (
  • It was found that the halogens in the monomer and the tracer do not adversely affect the bonding, the formation of the acid-proof dentin layer, viscosity and wetting and also the tracer can permeate into the etched ntin at same point as the original monomer does. (
  • The clinical success of ceramic restorations relies heavily on the quality of their adhesion to dentin, which remains a clinical challenge to date. (
  • A noticeable finding was that two of the restorations (1 IBSE and 1 CLSE) had failed in the same patient, and in both cases, the restorations had fractured leaving a large piece of the composite still bonded to the dentin. (
  • One reason IDS is stronger is that dentin bonds best to composite when the dentin is freshly cut, Dr. Magne said. (
  • Dentin bonding agents provide the most appropriate conditions for bonding o f composite resins to acid etched dentin surface and they have been developed through a few generations with continual improvements in bond strength and marginal sealing. (
  • Dr. Barros' group is doing further research to see if various etches remove the denatured layers of dentin, exposing a surface that can better bond to the composite resin. (
  • Data from literature demonstrates that adhesion force of composite resin systems, as applied to primary dentin , ranges from 5.53 to 70.1 MPa. (
  • Dentin hypersensitivity is defined as a short, sharp pain arising from exposed dentin in response to stimuli, which cannot be ascribed to any other form of dental defect or pathology. (
  • This study evaluated the effect of mechanical cycling on the bond strength of zirconia posts to root dentin. (
  • It was concluded that the mechanical cycling damaged the bond strength of zirconia posts to root dentin. (
  • 4 However, no studies have evaluated the bond strength of ceramic posts to root dentin after mechanical cycling, simulating a masticatory load. (
  • Considering the present knowledge gap on the resistance to fatigue of ceramic posts adhesively cemented, the aim of this study was to evaluate the effect of mechanical cycling on the push-out bond strength between root dentin and zirconium post. (
  • To evaluate the influence of rewetting solutions on bond strength to root dentin of conventional gutta-percha (GP) or niobium phosphate glass-based gutta-percha (GNb) associated with a bioceramic sealer. (
  • Methods The root dentin samples were demineralized by incubating with pH5.0 lactate acid at 370C. (
  • Methods Root dentin powder was demineralized with acetic acid (pH4.0) at 4 ℃ for 14 d, then dialysed and centrifuged. (
  • The mechanical and optical properties of healthy and transparent root dentin are compared using atomic force microscopy (AFM), micro-Raman and emission spectroscopies and fluorescence microscopy. (
  • The aim of this study was to assess the effect of CPP-ACP combined with fluoride varnish in cervical dentin hypersensitivity treatment. (
  • Effect of phosphoric acid on the degradation of human dentin matrix. (
  • Unlike enamel, dentin may be demineralized and stained for histological study. (
  • Histological examinations revealed an increased area of dentin/pulp-like structures in transplanted CD146 + cells, compared with CD146 − and CD146 +/− cells. (
  • Whether CPP-ACP can act synergistically with fluorine in the dentin hypersensitivity treatment is unknown. (
  • An in vitro model was used to examine the effects of radiotherapy, elapsed time following radiation, and occlusal function on the nano -mechanical properties of enamel and dentin near the DEJ. (
  • This preliminary evidence suggests that radiation, in conjunction with elapsed time and occlusal load, has a significant effect on the nano -mechanical properties of enamel and dentin near the DEJ. (
  • The mineral density distributions found in this study contribute to our understanding of the mechanical properties of enamel and dentin. (
  • Conclusion: Partial demineralization of xenogenous dentin blocks may provide a method for optimizing the integration of dentin onlays in an osteoconductive environment, thus stabilizing the implant and slowing down replacement resorption. (
  • Purpose: To evaluate the effect of artificial demineralization upon color change of dentin in contact with dental amalgam. (
  • Clinical significance: Deposition of black corrosion products into dentin was strongly related to dentin demineralization. (
  • To contradict this view, not all exposed dentin surfaces cause DH. (
  • In Group 1, the exposed dentin surfaces were conditioned with GC cavity conditioner for a duration of 10 s, washed and air dried but not desiccated. (
  • It is also worth considering that high failure rates of ceramic laminate veneers have been related to large exposed dentin surfaces [13,18]. (
  • The exposed dentin surfaces were sequentially polished with 240, 320, 450, and 600 grit sand paper. (
  • Caries study: Dentin surfaces, some with pre-existing caries, were visualized using CLSM. (
  • A dispersive high-Cu amalgam or conventional low-Cu amalgam was condensed onto dentin surfaces of all groups. (
  • DenMat offers traditional phosphoric acid formulas as well as phosphoric acid and aluminum oxalate combined so you can etch enamel and condition dentin at the same time. (
  • In contrast, the organic fibers found in dentin appear to exert exactly the right pressure on the mineral nanoparticles that is required to increase the material's repetitive, cyclic load-bearing capacity," argue the scientists. (
  • These results support the notion that the dentin proteins expressed by presecretory ameloblasts contribute to the unique properties of the dentino-enamel junction. (
  • The supernatants were analyzed by Western Blot for several dentin matrix proteins known to be MMP-3 substrate. (
  • The bioactive polymer used in UNO forms a rapid, protective, dentin integrated layer to prevent hypersensitivity", said Dr. Kishen. (
  • 12 Nevertheless, there are still no studies relating the combined use of bioceramic sealers and bioactive gutta-percha and their effects on the bond strength to dentin. (
  • This study characterized the percentage of dentin-like structures produced by CD146-positive (CD146 + ) human dental pulp stem cells (DPSCs), compared with their CD146-negative (CD146 − ) counterparts. (
  • UNO Gel provides rapid and long-lasting relief from dentin hypersensitivity, a common dental complaint that can significantly impair eating, drinking or speaking. (
  • This study demonstrated that the application of carbon dioxide laser irradiation significantly alters the surface of dentin but did not decrease the acid dissolution rate. (
  • The contact angle of the dentin increased significantly in all polishing tests, compared to an unpolished dentin surface (control). (
  • Results: Acid conditioning significantly increased the release of bFGF from dentin slices. (
  • Dr. Barros and her colleagues at the University of Michigan (where she was formerly based), used infrared thermography and microtensile bond strength (MTBS) analysis to study the potential effects of Er,Cr:YSGG lasers on dentin adhesion and pulp. (
  • In the treatment of hypersensitive dentin Phenol Compound is highly efficacious. (
  • Comparision of different conditioners and its effect on human dentin and on Light Activated Glass Ionomer Cements. (
  • Secondary dentin, a less well-organized form of tubular dentin, is produced throughout life as a patching material where cavities have begun, where the overlying enamel has been worn away, and within the pulp chamber as part of the aging process. (
  • Though more efficient nutritionally, this type of dentin is softer and less resistant to disease than tubular dentin. (
  • To address this objective, we evaluated dentin production in 2 acute trauma models: one involving a pulp exposure and the other involving a superficial dentin injury. (
  • Dentin rates approximately 3 on the Mohs scale of mineral hardness. (
  • Increases the hardness of the dentinal surface up to 10 times more than dentin coated with conventional bonding agents! (
  • Cures to a Barcol hardness of 72 - the typical hardness of dentin. (
  • That's why we created Absolute Dentin to cure to a Barcol hardness of 72, the typical hardness of dentin (hence the name). (
  • One experienced clinician performed all excavation procedures, monitoring the caries removal by checking the hardness of the dentin with a dental explorer. (
  • Although fluoride ions may be released during the acid-base reaction, (11) the ability of these materials to cover exposed dentin is their main mechanism that causes DH reduction. (
  • Mark 3 Dentin Desensitizer w/ Fluoride, 10 ml Bottle. (
  • Dentin is one of the most durable biological materials in the human body. (
  • Blocks of human dentin roots (3x3 mm2) were irradiated at 9.3 µm wavelength with a 15-18 µs pulse duration laser and fluences of 0.50-1.50 J/cm2. (
  • Relation of structure to the microhardness of human dentin. (
  • Effect of NaClO Treatment on Bonding to Root Canal Dentin Using a New Evaluation Method," Dental Materials Journal , vol. 20, no. 1, pp. 24-33, 2001. (
  • In the immediate evaluation, values obtained for primary dentin were lower than those of permanent dentin. (
  • A visual densitometric evaluation utilizing sclerotic index which is an estimation of the occurrence and intensity of dentin sclerosis by inspection of bitewing radiographs. (
  • The results of this evaluation indicate a localized increase of dentin sclerosis, or dentin calcification. (