The joining of objects by means of a cement (e.g., in fracture fixation, such as in hip arthroplasty for joining of the acetabular component to the femoral component). In dentistry, it is used for the process of attaching parts of a tooth or restorative material to a natural tooth or for the attaching of orthodontic bands to teeth by means of an adhesive.
A material used for cementation of inlays, crowns, bridges, and orthodontic appliances and occasionally as a temporary restoration. It is prepared by mixing zinc oxide and magnesium oxide powders with a liquid consisting principally of phosphoric acid, water, and buffers. (From Bouchers' Clinical Dental Terminology, 3d ed)
Water-soluble low-molecular-weight polymers of acrylic or methacrylic acid that form solid, insoluble products when mixed with specially prepared ZnO powder. The resulting cement adheres to dental enamel and is also used as a luting agent.
Magnesium oxide (MgO). An inorganic compound that occurs in nature as the mineral periclase. In aqueous media combines quickly with water to form magnesium hydroxide. It is used as an antacid and mild laxative and has many nonmedicinal uses.
A prosthetic restoration that reproduces the entire surface anatomy of the visible natural crown of a tooth. It may be partial (covering three or more surfaces of a tooth) or complete (covering all surfaces). It is made of gold or other metal, porcelain, or resin.
Holding a DENTAL PROSTHESIS in place by its design, or by the use of additional devices or adhesives.
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)
Use of a metal casting, usually with a post in the pulp or root canal, designed to support and retain an artificial crown.
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)
Zirconium. A rather rare metallic element, atomic number 40, atomic weight 91.22, symbol Zr. (From Dorland, 28th ed)
The selected form given to a natural tooth when it is reduced by instrumentation to receive a prosthesis (e.g., artificial crown or a retainer for a fixed or removable prosthesis). The selection of the form is guided by clinical circumstances and physical properties of the materials that make up the prosthesis. (Boucher's Clinical Dental Terminology, 4th ed, p239)
A mild astringent and topical protectant with some antiseptic action. It is also used in bandages, pastes, ointments, dental cements, and as a sunblock.
Substances used to bond COMPOSITE RESINS to DENTAL ENAMEL and DENTIN. These bonding or luting agents are used in restorative dentistry, ROOT CANAL THERAPY; PROSTHODONTICS; and ORTHODONTICS.
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.
An element of the rare earth family of metals. It has the atomic symbol Y, atomic number 39, and atomic weight 88.91. In conjunction with other rare earths, yttrium is used as a phosphor in television receivers and is a component of the yttrium-aluminum garnet (YAG) lasers.
The description and measurement of the various factors that produce physical stress upon dental restorations, prostheses, or appliances, materials associated with them, or the natural oral structures.
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.
Used as a dental cement this is mainly zinc oxide (with strengtheners and accelerators) and eugenol. (Boucher's Clinical Dental Terminology, 4th ed, p50)
A bone tumor composed of cellular spindle-cell stroma containing scattered multinucleated giant cells resembling osteoclasts. The tumors range from benign to frankly malignant lesions. The tumor occurs most frequently in an end of a long tubular bone in young adults. (From Dorland, 27th ed; Stedman, 25th ed)
The plan and delineation of dental prostheses in general or a specific dental prosthesis. It does not include DENTURE DESIGN. The framework usually consists of metal.
Adhesives used to fix prosthetic devices to bones and to cement bone to bone in difficult fractures. Synthetic resins are commonly used as cements. A mixture of monocalcium phosphate, monohydrate, alpha-tricalcium phosphate, and calcium carbonate with a sodium phosphate solution is also a useful bone paste.
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.
A scraping, usually of the interior of a cavity or tract, for removal of new growth or other abnormal tissue, or to obtain material for tissue diagnosis. It is performed with a curet (curette), a spoon-shaped instrument designed for that purpose. (From Stedman, 25th ed & Dorland, 27th ed)
Materials used in the production of dental bases, restorations, impressions, prostheses, etc.
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)
The methyl ester of methacrylic acid. It polymerizes easily to form POLYMETHYL METHACRYLATE. It is used as a bone cement.
Inability or inadequacy of a dental restoration or prosthesis to perform as expected.
A partial denture attached to prepared natural teeth, roots, or implants by cementation.
Skills, techniques, standards, and principles used to improve the art and symmetry of the teeth and face to improve the appearance as well as the function of the teeth, mouth, and face. (From Boucher's Clinical Dental Terminology, 4th ed, p108)
Preparation of TOOTH surfaces, and of materials bonded to teeth or DENTAL IMPLANTS, with agents and methods which roughen the surface to facilitate adhesion. Agents include phosphoric or other acids (ACID ETCHING, DENTAL) and methods include LASERS.
Creation of a smooth and glossy surface finish on a denture or amalgam.
Any of the numerous types of clay which contain varying proportions of Al2O3 and SiO2. They are made synthetically by heating aluminum fluoride at 1000-2000 degrees C with silica and water vapor. (From Hawley's Condensed Chemical Dictionary, 11th ed)
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)
The maximum stress a material subjected to a stretching load can withstand without tearing. (McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed, p2001)
Poly-2-methylpropenoic acids. Used in the manufacture of methacrylate resins and plastics in the form of pellets and granules, as absorbent for biological materials and as filters; also as biological membranes and as hydrogens. Synonyms: methylacrylate polymer; poly(methylacrylate); acrylic acid methyl ester polymer.
Techniques used for removal of bonded orthodontic appliances, restorations, or fixed dentures from teeth.
The degree of approximation or fit of filling material or dental prosthetic to the tooth surface. A close marginal adaptation and seal at the interface is important for successful dental restorations.
Hard, amorphous, brittle, inorganic, usually transparent, polymerous silicate of basic oxides, usually potassium or sodium. It is used in the form of hard sheets, vessels, tubing, fibers, ceramics, beads, etc.
The use of a layer of tooth-colored material, usually porcelain or acrylic resin, applied to the surface of natural teeth, crowns, or pontics by fusion, cementation, or mechanical retention.
Preparatory activities in ROOT CANAL THERAPY by partial or complete extirpation of diseased pulp, cleaning and sterilization of the empty canal, enlarging and shaping the canal to receive the sealing material. The cavity may be prepared by mechanical, sonic, chemical, or other means. (From Dorland, 28th ed, p1700)
The reaction product of bisphenol A and glycidyl methacrylate that undergoes polymerization when exposed to ultraviolet light or mixed with a catalyst. It is used as a bond implant material and as the resin component of dental sealants and composite restorative materials.
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)
Characteristics or attributes of the outer boundaries of objects, including molecules.
An antiseptic and disinfectant aromatic alcohol.
Natural teeth or teeth roots used as anchorage for a fixed or removable denture or other prosthesis (such as an implant) serving the same purpose.
The second largest of the TARSAL BONES. It articulates with the TIBIA and FIBULA to form the ANKLE JOINT.
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.
Synthetic resins, containing an inert filler, that are widely used in dentistry.
Preparation of TOOTH surfaces and DENTAL MATERIALS with etching agents, usually phosphoric acid, to roughen the surface to increase adhesion or osteointegration.
Any of the eight frontal teeth (four maxillary and four mandibular) having a sharp incisal edge for cutting food and a single root, which occurs in man both as a deciduous and a permanent tooth. (Jablonski, Dictionary of Dentistry, 1992, p820)
A purely physical condition which exists within any material because of strain or deformation by external forces or by non-uniform thermal expansion; expressed quantitatively in units of force per unit area.
The longest and largest bone of the skeleton, it is situated between the hip and the knee.
The second longest bone of the skeleton. It is located on the medial side of the lower leg, articulating with the FIBULA laterally, the TALUS distally, and the FEMUR proximally.
Tumors or cancer located in bone tissue or specific BONES.
Replacement of the hip joint.
Elements of limited time intervals, contributing to particular results or situations.

Radiological factors influencing femoral and acetabular failure in cemented Charnley total hip arthroplasties. (1/386)

We have made a retrospective review of 185 cemented Charnley total hip arthroplasties performed between 1970 and 1974 to determine the relationships between radiological variables and failure of the femoral and acetabular components. We measured the acetabular wear, the orientation of the cup, the thickness and consistency of acetabular and femoral cement mantles, radiolucency and femoral alignment. The mean follow-up was for 11.7 years. Femoral loosening was demonstrable radiologically in 15 hips (8.1%), ten (5.4%) of which were revised during the period of follow-up. Only when the first postoperative radiograph showed a thin cement mantle in Gruen zone 5 was there a significant association with failure of the femoral component. There were 12 loose acetabular components (6.5%), nine (4.8%) of which were revised. When the initial radiograph after operation showed radiolucency in DeLee and Charnley zone 1, the incidence of acetabular loosening was 28.21%. If such radiolucency was not present, the incidence of acetabular loosening was only 0.69%. Our findings emphasise the importance of careful cementing.  (+info)

Influence of composite inlay/onlay thickness on hardening of dual-cured resin cements. (2/386)

This investigation evaluated the effect of resin composite inlay/onlay thickness on the hardness of a group of eight dual-cure resin-based cements. Fourteen disc specimens measuring 6 mm in diameter and 2.5 mm thick were prepared from each of eight dual-cure cements: Adherence, Choice, Duolink, Enforce, Lute-It, Nexus, Resinomer and Variolink. Two specimens from each material were directly light-cured while the remainder of the specimens were light-cured through resin composite spacers varying in thickness from 1 mm to 6 mm. Curing through the spacers always resulted in a decrease in the Knoop hardness number. For some cements, hardness values were reduced by 50% or more when the resin composite spacer thickness was 4 mm or greater even when measurements were made one week after dual-curing. Low hardness values indicate the presence of a weak chemical-curing mechanism that may compromise cement quality in areas of the cavity not readily accessible to the curing light.  (+info)

A survey of the delegation of orthodontic tasks and the training of chairside support staff in 22 European countries. (3/386)

This paper reports on a survey which was undertaken to investigate the delegation of orthodontic tasks and the training of chairside support staff in Europe. Two questionnaires were posted to all members of the EURO-QUAL BIOMED II project together with an explanatory letter. The first dealt with the delegation of nine clinical tasks during orthodontic treatment. The second with the types of chairside assistant employed in each country and the training that they are given. Completed questionnaires, which were subsequently validated, were returned by orthodontists from 22 countries. They indicated that there was no delegation of clinical tasks in six of the 22 countries and delegation of all nine tasks in five countries. The most commonly delegated tasks were taking radiographs (in 14 of the 22 countries) and taking impressions (in 13 of the 22 countries). The least commonly delegated tasks were cementing bands (in five of the 22 countries) and trying on bands (in six of the 22 countries). Seven of the 22 countries provided chairside assistants with training in some clinical orthodontic tasks. Eighteen of the 22 countries provided general training for chairside assistants and offered a qualification for chairside assistants. Four of these 18 countries reported that they only employed qualified chairside assistants. Of the four countries which reported that they did not provide a qualification for chairside assistants, two indicated that they employed chairside assistants with no formal training and two that they did not employ chairside assistants. It was concluded that there were wide variations within Europe as far as the training and employment of chairside assistants, with or without formal qualifications, and in the delegation of clinical orthodontic tasks to auxiliaries was concerned.  (+info)

Restoration of endodontically treated teeth with carbon fibre posts--a prospective study. (4/386)

BACKGROUND: A prospective study was started in 1995 to evaluate the success of carbon fibre reinforced epoxy resin (CFRR) posts used to restore endodontically treated teeth. All the teeth in the study had lost more than 50% of their coronal structure. METHODS: Fifty-nine carbon fibre Composiposts cemented with Metabond and built up with Core Paste cores were placed into the teeth of 47 patients. Each tooth received a full-coverage restoration (porcelain fused to metal crown) and was followed for 6.7-45.4 months (average = 28.0 months, standard deviation = 10.7). RESULTS: Results for 52 teeth in 42 patients were analyzed. There were no fractures. The overall failure rate was 7.7% and the cumulative survival rate was 89.6% at the end of the follow-up period. The only statistically significant finding (p = 0.04) was that posts in lower premolars were at higher risk of failure. CONCLUSION: CFRR posts are among the most predictable systems available today. CFRR posts in the upper anterior teeth are associated with a higher success rate and longer life than those placed in premolars, especially lower premolars. This study contributes to the growing body of evidence that supports the use of CFRR posts in the restoration of endodontically treated teeth.  (+info)

All-polyethylene versus metal-backed and stemmed tibial components in cemented total knee arthroplasty. A prospective, randomised RSA study. (5/386)

We studied the quality of fixation of the tibial component using radiostereometric analysis (RSA) in 40 patients who had undergone a cemented Freeman-Samuelson total knee arthroplasty. They were prospectively randomised to either a stemmed metal-backed (MB) or non-stemmed all-polyethylene (AP) tibial component. The articulating geometry of the implants was identical, as was the operative technique and the postoperative regime. The study showed no complications of fixation using AP tibial components, and the migration was the same as that of their metal-backed counterparts. There was no bony collapse or increased subsidence of any part of the tibial component or increased incidence of radiolucent lines in the knees with AP components. Most AP implants were stable between one and two years after surgery, a finding known to be of positive prognostic significance when predicting future aseptic loosening.  (+info)

Radiological features predictive of aseptic loosening in cemented Charnley femoral stems. (6/386)

The radiological features of the cement mantle around total hip replacements (THRs) have been used to assess aseptic loosening. In this case-control study we investigated the risk of failure of THR as predictable by a range of such features using data from patients recruited to the Trent Regional Arthroplasty Study (TRAS). An independent radiological assessment was undertaken on Charnley THRs with aseptic loosening within five years of surgery and on a control group from the TRAS database. Chi-squared tests were used to test the probability of obtaining the observed data by chance, and odds ratios were calculated to estimate the strength of association for different features. Several features were associated with a clinically important increase (>twofold) in the risk of loosening, which was statistically significant for four features (p < 0.01). Inadequate cementation (Barrack C and D grades) was the most significant feature, with an estimated odds ratio of 9.5 (95% confidence interval 3.2 to 28.4, p < 0.0001) for failure.  (+info)

Changes in proximal femoral strain after insertion of uncemented standard and customised femoral stems. An experimental study in human femora. (7/386)

We have compared the changes in the pattern of the principal strains in the proximal femur after insertion of eight uncemented anatomical stems and eight customised stems in human cadaver femora. During testing we aimed to reproduce the physiological loads on the proximal femur and to simulate single-leg stance and stair-climbing. The strains in the intact femora were measured and there were no significant differences in principal tensile and compressive strains in the left and right femora of each pair. The two types of femoral stem were then inserted randomly into the left or right femora and the cortical strains were again measured. Both induced significant stress shielding in the proximal part of the metaphysis, but the deviation from the physiological strains was most pronounced after insertion of the anatomical stems. The principal compressive strain at the calcar was reduced by 90% for the anatomical stems and 67% for the customised stems. Medially, at the level of the lesser trochanter, the corresponding figures were 59% and 21%. The anatomical stems induced more stress concentration on the anterior aspect of the femur than did the customised stems. They also increased the hoop strains in the proximomedial femur. Our study shows a consistently more physiological pattern of strain in the proximal femur after insertion of customised stems compared with standard, anatomical stems.  (+info)

Esthetic option for the implant-supported single-tooth restoration -- treatment sequence with a ceramic abutment. (8/386)

A single implant-supported restoration is one treatment alternative to consider for the replacement of a missing tooth. Technological advances in materials and machining have led to the development of a densely sintered aluminum oxide ceramic abutment, designed and machined using CAD/CAM technology. This manufacturing method improves management of the subgingival depth of the crown/abutment interface and enhances the esthetic qualities of the restoration. However, since this ceramic abutment has less mechanical resistance than metal abutments, its use should be confined to the restoration of incisors and premolars not subjected to excessive occlusal forces.  (+info)

We present an application of 3D X-ray computed microtomography for studying the influence of numerical cementation on flow in a cement-lined rough-walled fracture. The imaged fracture geometry serves...
For a correct placement and early fixation of an uncemented hip prosthesis, a centralizer is used. Normally, the centralizer is made of PMMA, the same material as bone cement. When a revision is needed, PMMA is difficult to remove, which is one of the reason not to use a cemented hip prosthesis. With a PMMA centralizer, still PMMA will remain in the bone and needs to be removed in case of a revision. PEGT/PBT is a reabsorbable material, which gives stability during the first month after the placement of the hip prosthesis. However, PEGT/PBT is reabsorped afterwards and, therefore, will not interfere with a revision procedure.. The goal of this study is to analyse if the PEGT/PBT is as safe as PMMA in terms of alignment, direct postoperative complications and clinical results.. Therefore, 100 patients indicated for a cementless Bihapro hip prosthesis which have signed an informed consent are included and randomised over the used centralizers using a weighted randomisation method. All patients ...
BACKGROUND: Although shoulder arthroplasty is an accepted treatment for osteoarthritis, loosening of the glenoid component, which mainly occurs at the bone-cement interface, remains a major concern. Presently, the mechanical effect of the cement mantel thickness on the bone-cement interface is still unclear. METHODS: Finite element analysis of a prosthetic scapula was used to evaluate the effect of cement thickness on stresses and micromotions at the bone-cement interface. The glenoid component was all-polyethylene, keeled and flat back. Cement mantel thickness was gradually increased from 0.5 to 2.0 mm. Two glenohumeral contact forces were applied: concentric and eccentric. Two extreme cases were considered for the bone-cement interface: bonded and debonded. FINDINGS: Within cement, stress increased as cement thickness decreased, reaching the fatigue limit below 1.0 mm. Bone stress was below its ultimate strength and was minimum between 1.0 and 1.5mm. Interface stress was close to the interface
A femoral stem prosthesis with a preapplied cement mantle having a design with elongated interstices configured to enhance the ability of additional bone cement to fully encapsulate those portions of the metal femoral stem intended to be within the cement mantle. A preformed cement mantle having elongated interstices may be preapplied to a fernoral stem prosthesis.
Interfacial micromotion of the two nonstemmed systems along the two interface lines. The cup and bone surfaces denoted as the line on the cup interior and bone
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TY - JOUR. T1 - The effect of vacuum mixing and pre-heating the femoral component on the mechanical properties of the cement mantle. AU - Baleani, M.. AU - Bialoblocka-Juszczyk, E.. AU - Engels, G. E.. AU - Viceconti, M.. PY - 2010/3. Y1 - 2010/3. N2 - We investigated the effect of pre-heating a femoral component on the porosity and strength of bone cement, with or without vacuum mixing used for total hip replacement. Cement mantles were moulded in a manner simulating clinical practice for cemented hip replacement. During polymerisation, the temperature was monitored. Specimens of cement extracted from the mantles underwent bending or fatigue tests, and were examined for porosity. Pre-heating the stem alone significantly increased the mean temperature values measured within the mantle (+14.2°C) (p ,0.001) and reduced the mean curing time (-1.5 min) (p ,0.001). The addition of vacuum mixing modulated the mean rise in the temperature of polymerisation to 11°C and reduced the mean duration of the ...
Implants and methods are presented for surgically repairing a hip joint with a proximal femoral prosthesis that comprises femoral head component and a femoral stem component. The femoral stem component comprising a neck portion, a flange portion, a transitional body region and an elongated stem. The femur is prepared for implantation of the femoral hip prosthesis by resecting the proximal femur and reaming a symmetric intramedullary cavity in the femur. The femoral hip prosthesis is then inserted the on the resected femur and in the intramedullary cavity. The femoral hip prosthesis elastically deforms when loaded during use to apply dynamic compressive loads and displacement to the calcar region of the resected proximal femur.
Implants and methods are presented for surgically repairing a hip joint with a proximal femoral prosthesis that comprises femoral head component and a femoral stem component. The femoral stem component comprising a neck portion, a flange portion, a transitional body region and an elongated stem. The femur is prepared for implantation of the femoral hip prosthesis by resecting the proximal femur and reaming a symmetric intramedullary cavity in the femur. The femoral hip prosthesis is then inserted the on the resected femur and in the intramedullary cavity. The femoral hip prosthesis elastically deforms when loaded during use to apply dynamic compressive loads and displacement to the calcar region of the resected proximal femur.
The mechanical effects of varying the depth of cement penetration in the cement-bone interface were investigated using finite element analysis (FEA) and validated using companion experimental data. Two FEA models of the cement-bone interface were created from micro-computed tomography data and the penetration of cement into the bone was varied over six levels each. The FEA models, consisting of the interdigitated cement-bone constructs with friction between cement and bone, were loaded to failure in tension and in shear. The cement and bone elements had provision for crack formation due to excessive stress. The interfacial strength showed a strong relationship with the average interdigitation (r(2)=0.97 and r(2)=0.93 in tension and shear, respectively). Also, the interface strength was strongly related with the contact area (r(2)=0.98 and r(2)=0.95 in tension and shear, respectively). The FEA results compared favorably to the stiffness-strength relationships determined experimentally. Overall, ...
Purpose: Total hip arthroplasty (THA) is a widespread option for treating hip osteoarthritis. Peri-prosthetic complications after THA represent a common event influencing patient outcome and costs. The purpose of this paper is to report the use of ultrasonography (US) to detect peri-prosthetic complications in symptomatic patients who underwent THA. Methods: We retrospectively reviewed the records of patients with THA who underwent imaging evaluation between January 2009 and December 2012 at two different institutions. We evaluated the presence/absence of superficial and/or deep peri-prosthetic collections as well as the presence/absence of a cutaneous sinus tract. For patients who underwent both MRI and US, a concordance correlation analysis between US and MR findings was performed. Results: In the reference period, 532 symptomatic patients (mean age ± standard deviation 74 ± 12 years) underwent X-ray and MRI examinations for suspected peri-prosthetic complications. Among them, 111 (20.9 %) ...
Coal drying, preparation plants, and lignite beneficiation is another core competency of the Cementation AG team. Background in coal drying includes detailed design of thermal and metallurgical coal fluidized bed dryers, HAZOP reviews, studies, and explosion vent design and evaluation per NFPA 68 and EN 14491. The team has developed coal preparation plants from feasibility through commissioning. Preparation plant engineering experience includes process design & optimization, equipment specification (dense media vessels and cyclones, basket and screen bowl centrifuges, spirals, dewatering screens, froth floatation, filtration, etc.), detailed plant design, commissioning, studies, and existing plant upgrades. Cementation AG personnel have designed, built, and commissioned lignite beneficiation plants and advised in the design of world class facilities for coal gasification.. ...
Adult male orangutans exhibit two modes of physical development, flanged and unflanged. Flanged adult males have a variety of secondary sexual characteristics, including cheek pads (called flanges), throat pouch, and long fur, that are absent from both adult females and from unflanged males. Flanged males establish and protect territories that do not overlap with other flanged males territories. Adult females, juveniles, and unflanged males do not have established territories. A flanged males mating strategy involves establishing and protecting a territory, advertising his presence, and waiting for receptive females to find him. Unflanged males are also able to reproduce; their mating strategy involving finding females in estrus and forcing copulation. Males appear to remain in the unflanged state until they are able to establish and defend a territory, at which point they can make the transition from unflanged to flanged within a few months. The two reproductive strategies, referred to as ...
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Once the restoration has been milled, the clinician must decide which technique best aesthetically enhances the restoration, based on the expectations of the patient and the position of the tooth in the mouth. For molars, polishing with wheels and brushes using a diamond polishing paste are sufficient. For cases where the aesthetic desires of the patient are higher, or the restorations more visible, the clinician can choose to stain and glaze the restoration.. Typically in laboratories, a two-step glaze cycle is used where the appropriate colored stains are placed on the restoration and the restoration is run through the firing cycle. Because the ceramic reconstructions procedure aims to complete the clinical visit in a minimal amount of time, the stain and glaze cycles are conducted in a single step. The glaze is applied first, and then the appropriate stains are placed. The restoration is fired in a single step, which not only fixes the stains, but also fuses the glaze to the surface of the ...
The fluid flow and transport phenomena are simulated through three-dimensional consolidated and unconsolidated digital rock slabs representing the geological rock types of the McMurray formation. Finite element simulations are carried out in order to solve the mixing advection-diffusion problem, and the effluent history is processed to predict the longitudinal dispersion coefficient and evaluate the efficiency of miscible displacement processes in the presence of microheterogeneities. According to the results, consolidated samples with non-uniform cementation show a different dispersion behavior when compared to both unconsolidated and uniformly cemented rocks, suggesting that the cementation pattern remarkably influences the miscible-flood performance.. ...
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Methods of further processing of Prettau Zirconia®; from the colorization before and after the sintering, to the cementation of the workpiece.
The pioneering and world-leading research conducted at the University of Exeters state-of-the-art Living Systems Institute (LSI) will form the basis of the latest high-profile Global Conversation event.. Read story ...
EXETER - The Board of Selectmen banned smoking in all town vehicles when it approved an amendment to the towns no smoking policy on Monday night. The policy had already banned smoking in town buildings.
This thesis is an attempt to understand the suspicion of money implied in Jesus statement that it is impossible to serve both God and Mammon. I argue on the basis of Scripture, reason and tradition that problems associated ...
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The systematic review was performed to evaluate and summarize the current evidence on the clinical performance of the SL-PLUS Cementless Femoral Hip Stem ...
C&B Zinc Phosphate cement is designed for the final cementation of crown and bridge restorations and is refined to provide enhanced physical properties.
50 Years old gentleman came with complaints of pain in the left hip region and difficulty in walking for the past 1 year. He had a history of Surgical procedure (left hip cemented hemiarthroplasty) done 15 years back elsewhere ...
The cement-bone interface plays an important role in load transfer between cemented implant systems and adjacent bone, but little is known about the micromechanical behavior of this interface following in vivo service. Small samples of postmortem-retrieved cement-bone specimens from cemented total hip replacements were prepared and mechanically loaded to determine the response to tensile and compressive loading. The morphology of the cement-bone interface was quantified using a CT-based stereology approach. Laboratoryprepared specimens were used to represent immediate postoperative conditions for comparison. The stiffness and strength of the cement - bone interface from postmortem retrievals was much lower than that measured from laboratory-prepared specimens. The cement-bone interfaces from postmortem retrievals were very compliant (under tension and compression) and had a very low tensile strength (0.21±0.32 MPa). A linear regression model, including interface contact fraction and ...
Although hemiarthroplasties are an important treatment for femoral neck fractures, the literature does not provide a clear approach for selecting the implant fixation method. Therefore, we performed a
The present invention provides a positioner for controlling the position of a femoral hip implant within the intramedullary canal of a femur.
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Different types of crowns and locations require different preparation, bonding and cementation techniques. This is why Dr. Koeppel has a vast array of cementation and bonding agents, to fit each case specifically.. Loose Crowns - Sometimes crowns become loose or fall off due to the bonding process, materials used, or fit or using expired materials. Matching the proper cement to the bonding agent is critical, and keeping the area clean from saliva, blood, and water during the bonding process is imperative, it is technique sensitive. Over-preparation or under-preparation may also be the culprit. If this is the problem, then re-cementing the crown will not fix the problem. Crowns that have been on for long periods of time can become loose due to decay growing underneath the crown. A little decay is mistakenly left under the crown during preparation or an ill-fitting crown can leak, where bacteria can work itself in. Some of the older cements wash, causing a space between the crown and tooth where ...
The above statement assumes wrongly, that mere age causes rocks to become hard. Sediments are not dried bananas! When sand is first deposited, it has porosities of between 25 to 50%, silts and clays (muds) have between 35 and 70% porosity (This is very old knowledge, see Freeze and Cherry, 1979 and compare with similar values in Hedberg, 1926.). There are two processes which turn sediment into hard rock. The first is compaction, which takes place as the sediment is buried deeper and deeper by overlying sediments. This phenomenon presses the water out of the rock and forces the lithologic particles closer and closer. But that alone doesnt turn a sediment into hard rock. Cementation is the process whereby some form of mineral deposition occurs in the pore spaces between the rock grains, cementing them up. Muds simply wont become solid rock(shale) until they have been compressed by overlying sediments and cementation takes place. Those processes take at least 1000 feet of overburden. ...
I quite like cooking viagra 25 mg costo Halliburton had recommended BP use 21 centralizers in the Macondo well, and BP chose to use six. Halliburton later claimed that if BP had followed its recommendation to use more, the well would have been more stable. mg amoxicillin On October 1, an important part of the law was rolled out, when the â??insurance exchangesâ? , basically online marketplaces, started their operations. Well, they did not. The official website www.HealthCare.gov was unable to manage the unexpected run on the exchanges by millions of visitors who wanted to purchase insurances or just compare prices. The result: the system crashed. But what was officially called â??glitchesâ? at the beginning turned out to be serious software problems that will probably take a long time to fix. On Monday, President Obama voiced his frustration with the situation, vowing the government is â??doing everything we can possibly doâ? to repair the site, including a 24-hour work from â??some of ...
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As of 7:00am today, Exeter Hospitals Inpatient Operating Department has resumed normal business operations. Following a thorough, sophisticated, inspection of both the Inpatient OR and Emergency Room areas, state environmental experts have deemed both areas safe for patients and staff. The Emergency Department re-opened on Saturday at approximately 12:00pm followed by the Inpatient OR today at 7:00am.. Exeter Hospital will continue to work with environmental experts to investigate the cause of the incident. ...
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steel produced from wrought iron by cementation in covered pots, having a blistered appearance because of the gases generated during the process. ...
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leads so rapidly to suspicion. During the 19th century - a time when poisoners flourished, largely because forensic chemistry was still in its infancy - a few notable cases occurred. Probably the best known is that of Thomas Neil Cream, who poisoned a series of London prostitutes with strychnine in the 1890s. Before he was hanged, Cream also took credit for the crimes of Jack the Ripper. A widely publicized earlier case was that of William Palmer, who was executed for the strychnine murder of a friend but suspected of also killing four of his children, all of died of convulsions before their first birthdays.. These are isolated incidents, though. Killers of the day far preferred to use arsenic, antimony and other poisons that tended to mimic natural illness in their effects. Arsenic only fell fully out of favor in the early 20th century, after scientists proved repeatedly that it was readily detectable in a corpse.. In his recent book, Bitter Nemesis: The Intimate History of Strychnine, author ...
Short stems have become more and more popular for cementless total hip arthroplasty in the past few years. While conventional, uncemented straight stems for primary total hip arthroplasty (THA) have shown high survival rates in the long term, it is not known whether uncemented short stems represent a reasonable alternative. As cortical hypertrophy has been reported for short stems, the aim of this study was to determine the radiographic prevalence of cortical hypertrophy and to assess the clinical outcome of a frequently used short, curved hip stem. We retrospectively studied the clinical and radiographic results of our first 100 consecutive THAs (97 patients) using the Fitmore® hip stem. Mean age at the time of index arthroplasty was 59 years (range, 19 - 79 years). Clinical outcome and radiographic results were assessed with a minimum follow-up of 2 years, and Kaplan-Meier survivorship analysis was used to estimate survival for different endpoints. After a mean follow-up of 3.3 years (range, 2.0 - 4
Pre-revision radiographs showed the presence of both full and partial RLL. On contact radiographs of 5 mm thick sections of the interface the total percentage of radiolucency ranged from 0 to 90% between patients. There was no consistent pattern for the distribution of radiolucency. Histological assessment demonstrated that under every tibial component there were areas where there was direct contact and interdigitation between bone and cement. The amount of direct bone-cement contact was between 19% and 95% of the tibial tray surface area. The remaining tissue was mainly fibrocartilage but there was also fibrous tissue. The presence of radiolucency was strongly inversely correlated with the percentage of cement-bone contact ...
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The invention discloses a kind of precast light building cover board and industrialized building house floor slab structure.Precast light building cover board includes the light filling layer of the light filling block arrangement at finish coat, the finish coat back side, for by cementation part fixing with light filling layer location for finish coat, framework of steel reinforcement sheet has been inserted between light filling block, it is equipped with reinforced mesh after light filling layer, light filling layer after-pouring has a concrete, and concrete extends to the gap between light filling layer and by integral with light filling layer cementation shape to finish coat, reinforced mesh, framework of steel reinforcement sheet.Industrialized building house floor slab structure includes the some precast light building cover boards laterally arranging and being fixed in support beam, prefabricated lower deep gouge, prefabricated balcony assembly and cast-in-place concrete connector.This
ABSTRACT A method of hydraulic fracturing performed in uncased boreholes with considerable variability of cross section is discussed. Sealing of the determined interval is performed by fixed polymer bridges. For its implementation, it is proposed to use two pipe strings put one into another. The external string is equipped with centralizers and an annular drill bit. It provides borehole cleaning out and delivers tool into the fracturing interval. The internal string contains five separated (...)
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Cementation[edit]. Cementation is the diagenetic process by which coarse clastic sediments become lithified or consolidated ... The extent of cementation is dependent on the composition of the sediment. For example, in lithic sandstones, cementation is ... Furthermore, once a sediment is deposited, it becomes subject to cementation through the various stages of diagenesis discussed ... Conditions that encourage this are essentially opposite of those required for cementation. Rock fragments and silicate minerals ...
100 Years of Cementation. The Mining Magazine, Vol. VII, No. 2 (August 1912), p. 142. Liggett, Walter W. (1932) The rise of ... Agnew was a board member of the Cementation Company, and asked his son-in-law Abram Rupert Neelands, a Canadian mining engineer ...
100 Years of Cementation (PDF). Skanska. p. 45. History, Cleveland Bridge Ltd, archived from the original on 31 January 2009 ... In 1967 the company was acquired by The Cementation Company which was bought by Trafalgar House in 1970. A works was ...
m: strong cementation or induration. p: disturbed by ploughing or other tillage practices (A horizons only). q: accumulation of ...
This process is known as cementation. Calamine brass was produced using proportions of two-sevenths fine copper, four-sevenths ...
The cementation occurs on removal of water. The resulting ceramic material is suitable for very high temperature applications. ...
Minerals for cementation can come from groundwater. It is thought that a low point like a valley focuses groundflow, so more ... Cementation of underlying sediments by minerals dissolved in water may occur in a depression. On Earth, this often happens in ... water and cements move into it, and this results in a greater degree of cementation. Again, the cemented sediments would resist ...
The sandstones have an iron-rich cementation. A middle unit of fine-grained sandstones with thin banks of siltstones follows ...
Letchworth.) John McMillan McHutcheon, Tunnel Foreman, Cementation Company, Fasnakyle. (Inverness.) Joseph Christopher Dickson ...
The Esplanade-Sealdah section will be executed by ITD-ITD Cementation JV and was scheduled to start in May 2018. 5490 meters of ... This section was constructed by ITD-ITD Cementation JV. All the cross passes between the two tunnels have also been completed. ... 2009: Contract for building the underground section from Subhash Sarabor to Central Station awarded to ITD-ITD Cementation JV. ...
Prior to cementation of the restoration onto the prepared the tooth, the layer of separating materials needs to be removed to ... The process of preparation and cementation of an inlay or onlay is usually carried out over two appointments, with the ... Ozturk, Nilgün; Aykent, Filiz (March 2003). "Dentin bond strengths of two ceramic inlay systems after cementation with three ... Bonding agents can be applied to dentine before cementation of inlays and onlays. This is something that is very useful as ...
"Sedimentological control on carbonate cementation in the Luxembourg Sandstone Formation". Geologica Belgica (in French). 12 (1- ...
They were created by early cementation of sand and silt by calcite. Similar cannonball concretions, which are as much as 4 to 6 ... Al-Agha, M.R., S.D. Burley, C.D. Curtis, and J. Esson, 1995, Complex cementation textures and authigenic mineral assemblages in ... In the case of pervasive growth, cementation of the host sediments, by infilling of its pore space by precipitated minerals, ... Esson, J.; Curtis, C. D.; Burley, S. D.; Al-AGHA, M. R. (1995-02-01). "Complex cementation textures and authigenic mineral ...
Raab D: Fixation of full ceramic restorations - the advantages of cementation. 全瓷修复的粘接 - 水门汀的优势. DENTAL INC Chinese Edition ... Zinc phosphate cement is used for cementation of inlays, crowns, bridges, and orthodontic appliances and occasionally as a ... the advantages of cementation. DENTAL INC 2008: March / April 50-53. Raab D: Befestigung von Zirkonoxidkeramiken. ZAHN PRAX ...
Contractors were Cementation International, headed by Mike Slater of Great Britain.[citation needed] The property is built over ...
Cementation occurs as fine-grained material fills in gaps between debris. The speed of consolidation depends on the composition ...
Compactions and cementation generally lead to permeability reduction by losing porosity. When a large region, which consist a ... However, the void space enlarged by brecciation will lead to further displacement along the fault zone by cementation, ... Solute carried by fluids can either enhance or reduce permeability by dissolution or precipitation (cementation). Which process ... fault zone, experience compaction and cementation, porosity loss in host rock (undeformed rock surrounding the fault zone) can ...
Skeleton fragments from siliceous organisms are subject to recrystallization and cementation. Chert is the main fate of buried ...
Cycles of cementation and refracturing are generally recognised in such rocks. Pyroclastic Brodie, K.; Fette D.; Harte B.; ...
The final recovery step may involve precipitation, cementation, or an electrometallurgical process. Sometimes, ...
Others have shallow rooting zones and poor drainage due to subsoil cementation. A low pH further compounds issues, along with ...
... or biological cementation. S. pasteurii has been proposed to be used as an ecologically sound biological construction material ...
Anglo-Saxon goldsmiths used a process similar to cementation; as evidenced by the Staffordshire hoard. 1665: Correct theory of ...
If the process of cementation continues, new beachrock would be formed in a new position in the intertidal zone. Successive ... They are generally separated in several levels which may correspond to different generations of beachrock cementation. Thus, ... The role of microbial activity in early cementation of beachrocks (intertidal sediments). PhD Thesis, University of Geneva. ... They typically consist of multiple units, representing multiple episodes of cementation and exposure. The mineralogy of ...
Essentially, lithification is a process of porosity destruction through compaction and cementation. Lithification includes all ...
This can then be sent to the lab where the two pieces will be soldered and returned for another try-in or final cementation. ... It is advised to replace old composite restorations prior to cementation to provide optimum bond strength via the oxide layer. ... Mechanical failures: These failures can occur due to loss of retention of the bridge due to improper cementation, construction ... Aesthetic failures: These can occur at the time of cementation and include; colour mismatch, roughness of margins or improper ...
Unlike cementation of definitive crowns, temporary crowns should be relatively easy to remove. Adhesive cements should not be ... at the cementation stage, for excess cement to escape with the ultimate aim of optimising the seating of the crown on the ... cements Non-eugenol cements replace eugenol with several types of carboxylic acids which do not inhibit definitive cementation ...
The rate of cementation of the overlying substrate, relative to the rate of decomposition of the organism, determines whether ... Conversely, quilted fossils tend to decompose after the cementation of the overlying sediment; hence their upper surfaces are ...
Prior to the cementation of the provisional crown, the occlusion should be checked. Any deficiencies in the provisional crown ...
Cementation may refer to: Cementation (biology), the process whereby some sessile bivalve mollusks (and some other shelled ... similar to a cyst Cementation (metallurgy), a process in which ions are reduced to zero valence at a solid metallic interface ... the process of deposition of dissolved mineral components in the interstices of sediments Cementation (medical), a small ... a process for surface hardening of low-carbon steel Cementation Company, a British construction business This disambiguation ...
Cementation is continuous in the groundwater zone, so much so that the term "zone of cementation" is sometimes used ... Cementation occurs in fissures or other openings of existing rocks and is a dynamic process more or less in equilibrium with a ... As for calcite cementation, which occurs in meteoric realms (freshwater sources), the cement is produced by the dissolution of ... Cementation occurs primarily below the water table regardless of sedimentary grain sizes present. Large volumes of pore water ...
Cementation, in geology, hardening and welding of clastic sediments (those formed from preexisting rock fragments) by the ... Cementation, in geology, hardening and welding of clastic sediments (those formed from preexisting rock fragments) by the ... Cementation is one of the main processes involved, particularly for sandstones and conglomerates. In addition, reactions take ... rock may form by carbonate cementation of grains in deposits lying between tide levels. It then acts as a stabilizing factor. ...
... the clinically proven Ivoclar Vivadent luting materials that have been tried and tested many times for the adhesive cementation ... Silanization is not required for the self-adhesive cementation of ZrO2. This also applies to conventional cementation. Monobond ... Home , Products , All Products , All-Ceramics , IPS Empress System Dentists , IPS Empress Cementation and Care ... Adhesive cementation The quality and durability of ceramic restorations can be supported by using the correct luting material. ...
We present an application of 3D X-ray computed microtomography for studying the influence of numerical cementation on flow in a ... Rough fracture Cementation Fluid displacement Relative permeability Tortuosity This is a preview of subscription content, log ... Lander, R.H., Laubach, S.E.: Insights into rates of fracture growth and sealing from a model for quartz cementation in ... We present an application of 3D X-ray computed microtomography for studying the influence of numerical cementation on flow in a ...
Shale Gas Casing and Cementation Will Fail, but When?. By Barry Stevens - Jun 13, 2012, 4:49 PM CDT The other day, I received ...
The aim of this study is to objectively evaluate the quality of cementation by a novel method called the cementation index and ... It is an easy and objective method of assessment of cementation, the results of which need to be validated by a larger study. ... The quality of cementing was assessed by novel methods, the vertical and horizontal cementation index, which were statistically ... The mean vertical cementation index of the humerus (vCIH) was 1.22 ± 0.28 and that of the ulna (vCIU) was ,svg xmlns:xlink= ...
Indications: Variolink Esthetic DC Permanent cementation of glass-ceramic, lithium disilicate glassceramic and composite ... and dual-curing luting composite for the esthetic and permanent cementation of ceramic and composite resin restorations. This ... Variolink Esthetic is a light- and dual-curing luting composite for the esthetic and permanent cementation of ceramic and ... Permanent cementation of glass-ceramic, lithium disilicate glassceramic and composite restorations (inlays, onlays, partial ...
Bio-cementation technology is used to make artificial beachrock. Bio-cementation is a sand solidification technology, in which ... Beachrock Artificial beachrock Bio-cementation Coastal erosion Calcite precipitation Ureolytic bacteria Urease Sand cementation ... Ross C, Mew G, Childs C (1989) Deep cementation in late quaternary sands near Westport. Aust J Soil Res 27:275-288CrossRef ... Joer HA, Randolph MF, Meritt A, Ismail MA (2002) Cementation of porous materials using calcite. Géotechnique 52:313-324. https ...
Maryland Bridge Cementation Paste (9CI)) for price inquiry. where to buy 103370-94-1(Maryland Bridge Cementation Paste (9CI)). ... Also offer free database of 103370-94-1(Maryland Bridge Cementation Paste (9CI)) including MSDS sheet(poisoning, toxicity, ...
c. Post cementation: 1) the A and B pastes of the resin cement Duolink (Bisco, Schaumburg, IL, USA) were measured and mixed. ... For post cementation, the canals were treated with total-etch, 3-steps All-Bond 2 (Bisco), and the posts were cemented with ... The following procedures were followed for post cementation:. a. Post surface treatment (Cojet system, ESPE, St. Paul, MN, USA ... One factor that can improve the resistance to fracture of teeth needing restoration is adhesive cementation.9,10 The use of ...
Carbonate Cementation in Sandstones : Carbonate cements are very common and abundant in clastic sequences. They profoundly ... These papers present a wide and deep coverage that enhance our knowledge about carbonate cementation in various clastic ... These papers present a wide and deep coverage that enhance our knowledge about carbonate cementation in various clastic ... This Special Publication contains 21 review papers and case studies on carbonate cementation in clastic sequences written by ...
Carbonate cementation in the late glacial outwash and beach deposits in northern Estonia/Sekundaarne karbonaatne tsementatsioon ... Controls on spatial distribution of cementation The degree of cementation within sediments can vary widely and is controlled by ... but most of them do not exhibit calcite cementation. In the studied sites lateral cementation of variable thickness occurs in ... showing an abrupt interruption of cementation (e.g. at Pehka, Moldova and Tornimagi). Thereby cementation seems to be mainly ...
Know and be able to implement two different inlay cementation techniques. End-users The course is aimed at general dentists and ... as well as the different forms of provisionalisation and cementation that can be used. ...
The optimal content of components in saturating mixtures plasma by cementation defined. According to the study it is found that ... Cementation process carried out with selection of different modes of electrolytic-plasma processing in the electrolyte ... The optimal content of components in saturating mixtures of plasma by cementation is defined. According to the study it is ... Abstract: This work considers the questions of low-alloy tool steel cementation by laser treatment. The model of surface layer ...
Final Seating and Cementation of a Central Incisor Crown Description:. In this technique clinical video demonstration, Dr. ... Online Videos / Restorative / Crowns and Bridges / Final Seating and Cementation of a Central Incisor Crown ... Goldstein discusses the try-in phase, occlusion, shade management of a darkened core, as well as the final cementation. Date ...
... ... Marginal excision and cementation is the treatment of choice for primary as well as recurrent peri-articular benign bone ... All patients were treated with a marginal excision of the tumour followed by burring, curettage and PMMA cementation. This was ... BACKGROUND: Treatment of aggressive benign bone lesions with curettage, burring, cementation and plate augmentation is a widely ...
... ... Objective: To compare in vitro the influence of 3 cementation techniques on leakage and fracture strength of alumina all- ... One-way ANOVA and Tukey HSD were used for statistical analyses (a = .05). Results: Cementation techniques were significantly ... Crowns (Procera Alumina, Nobel Biocare) were fabricated and inserted with either conventional cementation with zinc phosphate ...
This work was digitised and made available on open access by the University of Sydney, Faculty of Dentistry and Sydney eScholarship . It may only be used for the purposes of research and study. Where possible, the Faculty will try to notify the author of this work. If you have any inquiries or issues regarding this work being made available please contact the Sydney eScholarship Repository Coordinator - [email protected] ...
Curettage, phenolization, and cementation in paediatric Ewings sarcoma with a complete radiological response to neoadjuvant ... phenolization and cementation), as a less extensive surgery for paediatric ES with a complete radiologic response to ...
b,Objectives:,/b, This study aimed to assess the effect of cement type and cementation technique on the retention of cement- ... Palavras-chave: dental implant, cementation, dental prosthesis retention, abutment replica technique, half-filling technique ... Effect of Cement Type and Cementation Technique on the Retention of Implant-Supported Restorations. Zohre Zeinabadi Department ... Objectives: This study aimed to assess the effect of cement type and cementation technique on the retention of cement-retained ...
Dolomite Cementation as Prime Control of Reservoir Quality in the Permian Rotliegend Sandstones, Offshore The Netherlands ( ...
Cementation. In preparation for cementation, the internal surface of the crown was etched with hydrofluoric acid for 20 seconds ... Making cementation and all-ceramic material selections to influence crown imperceptibility among tetracycline-stained teeth. ...
Influence of fatigue testing and cementation mode on the load-bearing capability of bovine incisors restored with crowns and ... The aim of the study was to evaluate the influence of fatigue and cementation mode on the fracture behavior of endodontically ... The loading test showed that neither cementation mode nor fatigue testing had an influence on the load bearing capability. Most ... Influence of fatigue testing and cementation mode on the load-bearing capability of bovine incisors restored with crowns and ...
M/s ITD Cementation India Limited [April 24, 2015] , Judgments dated April, 2015. ...
Cementation[edit]. Cementation is the diagenetic process by which coarse clastic sediments become lithified or consolidated ... The extent of cementation is dependent on the composition of the sediment. For example, in lithic sandstones, cementation is ... Furthermore, once a sediment is deposited, it becomes subject to cementation through the various stages of diagenesis discussed ... Conditions that encourage this are essentially opposite of those required for cementation. Rock fragments and silicate minerals ...
Cementation 3M offers a full line of dental cements and accessories to meet your crown and bridge procedural needs: resin, ...
The rate of the copper(II)/zinc cementation reaction was measured by five techniques: analysis of the reactant solution for ... A comparative study of different techniques for measuring the rate of the copper(II)/zinc cementation reaction ... 1986) A comparative study of different techniques for measuring the rate of the copper(II)/zinc cementation reaction. ...
DENTO TUBE is an online portal dedicated for free download of clinical surgical and treatment videos and softwares related to most fields of Dentistry . ...
... Copper extraction Wikipedia Cementation (metallurgy) Cementation is a type of ... CEMENTATION OF SILVER FROM SYNTHETIC LEACH …. CEMENTATION OF SILVER FROM SYNTHETIC LEACH SOLUTIONS OF WASTE OF PRINTED CIRCUIT ... Cementation , metallurgy , Britannica.com. …by a process known as cementation, in which water containing copper forms a deposit ... Salt Cementation & Gold Extraction - SlideShare. · 1. Salt Cementation & Gold Extraction An ancient refining technique that ...
  • Therefore, you can trust the clinically proven Ivoclar Vivadent luting materials that have been tried and tested many times over for the adhesive cementation of your IPS Empress restorations: Variolink Esthetic and Multilink Automix. (ivoclarvivadent.com)
  • The adhesive luting system is suitable for the cementation of indirect restorations made of silicate and oxide ceramics (e.g. (ivoclarvivadent.com)
  • For the adhesive and self-adhesive cementation of IPS e.max lithium disilicate (LS 2 ) restorations as well as the adhesive cementation of zirconium oxide (ZrO 2 ), the restorations are silanized using Monobond Plus (60 s). (ivoclarvivadent.com)
  • Silanization is not required for the self-adhesive cementation of ZrO 2 . (ivoclarvivadent.com)
  • One factor that can improve the resistance to fracture of teeth needing restoration is adhesive cementation. (scielo.br)
  • The aim of this article is to review the existing literature regarding FRCP, the available cement options and their adhesive strategy, along with the inherent difficulties to root canal cementation. (bvsalud.org)
  • Conclusion During the one year period, with the exception of BisCem, the self-adhesive resin cements were a favorable alternative for the adhesive cementation, standing out among these, the G-Cem and Multilink Sprint. (bvsalud.org)
  • For many years, cementation of the fiber post to root canals was performed with resin cements associated with adhesive systems. (springeropen.com)
  • Results There was a significant difference between the study groups ( 0.003), but the DDS, DDS/PA and Etch/PA organizations did not differ from the SA group (used a self-etching adhesive (Clearfil SE) for IDS and a SA resin cement (Panavia F) for the inlays cementation (11). (boothampitheatre.com)
  • On the other hand, Gresnigt used Optibond FL (an etch & rinse adhesive) for the IDS and Variolink Veneer (a conventional resin cement) for the veneers cementation (12). (boothampitheatre.com)
  • Pressable feldspathic inlays in premolars: effect of cementation strategy and mechanical cycling on the adhesive bond between dentin and restoration. (elsevier.com)
  • 3) modified simplified cementation using a self-adhesive resin cement (RelyX U100, 3M ESPE) with HF+S treatment. (elsevier.com)
  • Fingerprint Dive into the research topics of 'Pressable feldspathic inlays in premolars: effect of cementation strategy and mechanical cycling on the adhesive bond between dentin and restoration. (elsevier.com)
  • 9,10 The use of resin cements for post cementation makes roots less vulnerable to fracture under static loads and preserves dental structure, given that the posts may be shorter and have a smaller diameter. (scielo.br)
  • To evaluate the mechanical properties of three glass ionomers cements (GICs) used for band cementation in Orthodontics . (bvsalud.org)
  • We present an application of 3D X-ray computed microtomography for studying the influence of numerical cementation on flow in a cement-lined rough-walled fracture. (springer.com)
  • The postoperative radiographs were evaluated for the vertical cementation index, calculated by dividing the length of the cement mantle by the length of the humeral and ulnar components separately, and the horizontal cementation index, which was calculated by dividing the length of the radiolucent zone greater than 1 mm, if present, seen at the cement-bone interface, by the total length of the cement-bone interface. (hindawi.com)
  • For post cementation, the canals were treated with total-etch, 3-steps All-Bond 2 (Bisco), and the posts were cemented with Duolink dual resin cement (Bisco). (scielo.br)
  • Contemporary cement is more retentive, but successful cementation is also dependent on the correct tooth preparation. (ddslab.com)
  • The classical self-curing glass ionomer cement is suitable for the cementation of high-strength ceramic materials, such as IPS e.max, among others. (ivoclarvivadent.com)
  • 6. Zinc phosphate often is the cement of choice for final cementation of an implant restoration. (dentalreach.today)
  • During the fiber post cementation into a root canal, only the exposed marginal areas of cement are directly irradiated by the light-curing unit. (springeropen.com)
  • Variolink Esthetic is a light- and dual-curing luting composite for the esthetic and permanent cementation of ceramic and composite resin restorations. (ivoclarvivadent.us)
  • Throughout the course we will teach students the criteria for when to choose the different indirect restorations, how to design them correctly, as well as the different forms of provisionalisation and cementation that can be used. (uic.es)
  • Within the limitations of this study, the results showed that permanent cementation with half-filling technique yielded significantly higher retention in implant restorations. (begellhouse.com)
  • IPS e.max restorations permit flexibility of cementation, since the crowns and bridges can be cemented adhesively, self-adhesively or conventionally. (ivoclarvivadent.com)
  • Cementation is the final step of indirect restorations which, usually, we do not take very seriously - until the patient comes back with a dislodged crown repeatedly and we don't understand where we went wrong! (dentalreach.today)
  • This case demonstrates the ease of achieving aesthetic restorations particularly gingival aesthetics by using aluminum oxide sleeves and stealth shouldered abutments with an extra-oral cementation technique. (bicon.com)
  • Bio-cementation is a sand solidification technology, in which ureolytic bacteria release carbonate from urea hydrolysis in the presence of an excess of calcium ions to form calcite (CaCO 3 ). (springer.com)
  • This Special Publication contains 21 review papers and case studies on carbonate cementation in clastic sequences written by invited specialists on the subject. (youscribe.com)
  • These papers present a wide and deep coverage that enhance our knowledge about carbonate cementation in various clastic depositional environments, tectonic settings and burial histories. (youscribe.com)
  • Carbonate cementation in the late glacial outwash and beach deposits in northern Estonia/Sekundaarne karbonaatne tsementatsioon hilisglatsiaalsetes glatsifluviaalsetes ja rannikusetetes Pohja-Eestis. (thefreelibrary.com)
  • Carbonate cementation in polar regions or within glacial deposits in formerly glaciated areas have attracted interest as a potential indicator of hydrologic and permafrost conditions and palaeoclimatic proxies (e.g. (thefreelibrary.com)
  • Cementation process carried out with selection of different modes of electrolytic-plasma processing in the electrolyte containing water solution of 10 % of sodium carbonate and 10 % of glycerin. (scientific.net)
  • Cementation exponent in carbonate reservoir of the Wahoo Formation (i.e., its relationship to permeability, pore geometry, and hydrocarbon prod. (alaska.gov)
  • Extra-oral cementation of the all-ceramic crowns is made possible by Bicon's 360° of universal abutment positioning. (bicon.com)
  • The aesthetic restoration of a congenitally missing lateral incisor with only 5.0mm of mesio-distal space is facilitated by the extra-oral cementation of an all-ceramic crown onto a 3.5mm Bicon stealth shouldered abutment. (bicon.com)
  • The new self-curing Multilink Hybrid Abutment was especially developed for the cementation of lithium disilicate glass-ceramic onto titanium bases (IPs e.max hybrid abutments and IPS e.max hybrid abutment crowns). (ivoclarvivadent.com)
  • Dr. Goldstein discusses the try-in phase, occlusion, shade management of a darkened core, as well as the final cementation. (dentalxp.com)
  • Cementation , in geology, hardening and welding of clastic sediments (those formed from preexisting rock fragments) by the precipitation of mineral matter in the pore spaces. (britannica.com)
  • Rhodamine B dye was incorporated in the luting materials for the cementation of the fiber glass posts (Exacto, Angelus) to dentin. (unesp.br)
  • As a result, PA in colaboration with E&R adhesives could possibly be applied right before to cementation with SA concrete as postponed dentin closing (DDS) or in the IDS technique. (boothampitheatre.com)
  • Diagenesis is, as previously explained, the process of forming sedimentary rock by compaction and natural cementation of grains, or crystallization from water or solutions, or recrystallization. (britannica.com)
  • To compare in vitro the influence of 3 cementation techniques on leakage and fracture strength of alumina all-ceramic crowns after cyclic loading in an artificial chewing simulator. (quintpub.com)
  • Cementation technique affects fracture strength and leakage of all-ceramic molar crowns. (quintpub.com)
  • Influence of fatigue testing and cementation mode on the load-bearing capability of bovine incisors restored with crowns and zirconium dioxide posts. (mysciencework.com)
  • The aim of the study was to evaluate the influence of fatigue and cementation mode on the fracture behavior of endodontically treated bovine incisors restored with zirconium dioxide posts and crowns. (mysciencework.com)
  • It is ideal as a luting material for crowns, bridges, inlays, and onlays and can also be used for endodontic post cementation and fabrication of core buildups. (ultradent.com)
  • Meanwhile, in South Africa, zinc cementation is often used to recover gold from batch eluates because it is quick and simple. (wordpress.com)
  • St Ives Gold Mine by User: g f i mining south africa pty ltd nonjabe zwelilungile buffelsfontein gold mine klerksdorp murray and roberts cementation. (szsb.cz)
  • The best improvement of plasticity index was achieved for lateritic soil prepared with 75% S. pasteurii and 25% cementation reagent at S. pasteurii suspension density of 2.40 × 10 9 cells/ml with a corresponding peak 6.0% calcite content. (springer.com)
  • To evaluate the effect of the cementation strategy and mechanical cycling (MC) on the microtensile bond strength (MTBS) of feldspathic inlays cemented to premolars. (elsevier.com)
  • Patients with peri-articular aggressive benign bone lesions were treated with marginal excision, curettage, burring and cementation. (scielo.org.za)
  • Marginal excision and cementation is the treatment of choice for primary as well as recurrent peri-articular benign bone lesions. (scielo.org.za)
  • Rates of copper ions removal from waste solution by cementation, using an iron rod that was covered with the screen, and the cementation kinetics of copper deposition from sulfate solutions onto iron were studied under different conditions of initial copper ions concentration, initial pH of the solution and solution velocity. (bekemolen.be)
  • Bio-cementation is to enhance the strength and stiffness properties of soil and rocks through microbial activity or products. (springer.com)
  • Each group was subcategorized based on its cementation method (half-filling or abutment replica technique). (begellhouse.com)
  • GC yielded higher retention than Temp-Bond ™ while using the half-filling cementation technique ( P = 0.00). (begellhouse.com)
  • 1. Salt Cementation & Gold Extraction An ancient refining technique that separates silver and gold 2. (bekemolen.be)
  • Fiberglass post cementation using restorative and flowable bulk-fill composites with the individualization technique may be a promising alternative to existing methods of post cementation. (bvsalud.org)
  • Treatment of aggressive benign bone lesions with curettage, burring, cementation and plate augmentation is a widely accepted treatment. (scielo.org.za)
  • In this study, we compared the oncologic and functional outcomes of wide resection with extended curettage and local adjuvant therapy (phenolization and cementation), as a less extensive surgery for paediatric ES with a complete radiologic response to neoadjuvant chemotherapy. (springer.com)
  • by a process known as cementation, in which water containing copper forms a deposit on iron. (bekemolen.be)
  • I would absolutely avoid the use of copper wire for cementation. (bekemolen.be)
  • The bronze was probably produced by mixing copper and tin together whereas brass was produced by the cementation process (see Sect 10.3 ). (intarch.ac.uk)
  • Acid addition to maintain the leach solution at pH 2 was 7.0 kg H2SO4/t of ore for the leach- cementation process and 2.9 kg H2SO4/t of ore for the leach-solvent extraction-electrowinning process. (bekemolen.be)
  • This process is termed cementation. (ganoksin.com)
  • The cementation process as used in South America involved the mixing or covering of impure gold (for refining) or gold objects in order to depletion gild them with salt and clay combined with heating which eventually enriches the gold surface. (ganoksin.com)
  • These range from the highly specific, such as the details of the cementation process in the production of Roman brass, to the general, such as the nature of time and cultural change. (intarch.ac.uk)
  • The liquid limit value of the natural lateritic soil was used to prepare samples with three mix proportions of the bacteria and cementation reagent (i.e., 25% bacteria-75% cementation reagent, 50% bacteria-50% cementation reagent and 75% bacteria-25% cementation reagent). (springer.com)
  • The micrite envelope surrounding the echinoid fragment in Figure 6 originated in the same way as those shown Appendix II , i.e., through marine cementation within spaces created by endolithic boring organisms. (wvnet.edu)
  • Most specimens fractured in a favorable way, independent from the type of cementation. (mysciencework.com)
  • After cementation, root/post specimens were transversally sectioned into 1-mm-thick slices, which were submitted to push-out testing in a mechanical testing machine. (springeropen.com)
  • The quality of cementing was assessed by novel methods, the vertical and horizontal cementation index, which were statistically evaluated as predictors of failure. (hindawi.com)
  • Fracture strengths were well above natural chewing forces for all cementation methods. (quintpub.com)
  • This study evaluated the bond strength of various fiberglass post cementation techniques using different resin-based composites. (bvsalud.org)
  • Mechanical-cycling had no significant effect on bond strength, whereas cementation strategy significant affected MTBS results. (elsevier.com)
  • Burial cementation also affected the rocks. (wvnet.edu)
  • The aim of this study is to objectively evaluate the quality of cementation by a novel method called the cementation index and assess its utility as a predictor of failure. (hindawi.com)
  • CEMENTATION is one of the leading conglomerates with a strong presence of in businesses like Manufacturing, Processing and Exporting of Building and Construction materials, Minerals and Chemicals. (cementationindia.com)
  • This thesis puts the focus on bio-mediated soil cementation, a technology which alters substantially the structure of geo-materials and endows them with improved overall mechanical behaviour. (epfl.ch)
  • Banding and cementation difficult on deciduous teeth. (slideshare.net)