ScaffoldsAmorphous calcium phosphateBioactiveBiomaterialsSynthesisCoatingsOctacalcium phosphateIonsDicalciumNanocrystalsCollagen fibersBiphasic calciumCrystallineChitosanSilicaAdsorptionBiocompatibleImplantsPolymerCementBiocompatibilityWhiskersEnamelSituCarbonNanocompositesChlorideMonohydrateCompositionSurfaceMechanicalCeramicVitroPrecipitationTissueBiofilmMagnesiumStrontiumSiliconVivoCelluloseMaterialsPropertiesBiomimeticVersusAdhesiveCarbonateSolutionScaffoldPhaseResin
Scaffolds4
- Scaffolds with varying composition of hydroxyapatite, chitosan, and gelatin were prepared using lyophilization technique where glutaraldehyde (GTA) acted as a cross-linking agent for biopolymers. (csircentral.net)
- Hydroxyapatite (HAP) as the most thermally stable crystalline phase of CaP is mostly used in the form of ceramics or composites scaffolds with polymers. (encyclopedia.pub)
- 26 ] has shown that osteoblast survival and growth were significantly enhanced in the PLLA/HA composite scaffolds compared to the plain PLLA scaffolds. (hindawi.com)
- 8 nm).Ppy NPs effectively augment the conductivity, surface roughness, andthickness of BC composites despite reducing scaffolds' transparency.BC-Ppy composites were flexible (up to 10 mM Ppy), maintained theirintricate 3D extracellular matrix-like mesh structure in all Ppy concentrationstested, and displayed electrical conductivities in the range of nativecardiac tissue. (ibecbarcelona.eu)
Amorphous calcium phosphate4
- Amorphous calcium phosphate (ACP) is a glassy solid that is formed from the chemical decomposition of a mixture of dissolved phosphate and calcium salts (e.g. (wikipedia.org)
- The composition of amorphous calcium phosphate is CaxHy(PO4)z·nH2O, where n is between 3 and 4.5. (wikipedia.org)
- A commercial preparation of ACP is casein phosphopeptide-amorphous calcium phosphate (CPP-ACP), derived from cow milk. (wikipedia.org)
- Amorphous calcium phosphate in combination with casein phosphopeptide has been used as a dental treatment to treat incipient dental decay. (wikipedia.org)
Bioactive1
- For this reason, in the recent five years hydroxyapatite particles and whiskers have been added as novel bioactive and biocompatible reinforcing filler in dental restorations. (hindawi.com)
Biomaterials1
- Calcium phosphate (CaP)-based biomaterials have superior properties and have been widely used for bone defect repair, due to their similarities to the inorganic components of human bones. (encyclopedia.pub)
Synthesis1
- The resulting amorphous mixture consists mostly of calcium and phosphate, but also contains varying amounts of water and hydrogen and hydroxide ions, depending on the synthesis conditions. (wikipedia.org)
Coatings4
- This paper discusses the processes of grit-blasting, plasma spraying, acid-etching, anodization and implant surface coatings with hydroxyapatite. (com.pk)
- Ahmed F, Rashid H, Farookhi S, Verma V, Mulyar Y, Khalifa M, Sheikh Z. Surface modifications of endosseous dental implants by incorporation of roughness and hydroxyapatite coatings. (com.pk)
- 4- Composite coatings. (sharif.edu)
- Effects of strontium-substitution in sputter deposited calcium phosphate coatings on the rate of corrosion of magnesium alloys. (pitt.edu)
Octacalcium phosphate2
- It is believed that ACP hydrolyzes under physiological temperatures and pH to form octacalcium phosphate as an intermediate, and then surface apatite. (wikipedia.org)
- In aqueous media, ACP is easily transformed into crystalline phases such as octacalcium phosphate and apatite due to the growing of microcrystallites. (wikipedia.org)
Ions4
- Calculations support the description of a cluster with central Ca2+ ion surrounded by six phosphate PO43− anions, which in turn are surrounded by eight further calcium ions. (wikipedia.org)
- The idea behind it is that the posner molecules meld and release calcium-ions which stimulises the neurons. (wikipedia.org)
- Thus, a more durable, less soluble, and more translucent material was developed 33 , with chemical bonding to the dental substrate by the bonding of calcium ions to carboxylic radicals existing in the enamel, dentin and cementum. (bvsalud.org)
- In this study, a strontium-doped hydroxyapatite (Sr-HAP) was synthesized by the sol-gel method, which used as adsorbent to remove lead ions (Pb 2+ ) from water. (researchsquare.com)
Dicalcium1
- However concentration below 27% may create a dicalcium phosphate monohydrate that cannot be rinsed off. (onlinedentallearning.in)
Nanocrystals1
- First, phase pure hydroxyapatite-chitosan nanocrystals were in situ synthesized by coprecipitation method using a solution of 2% acetic acid dissolved chitosan and aqueous solution of calcium nitrate tetrahydrate Ca(NO3)(2),4H(2)O] and diammonium hydrogen phosphate (NH4)(2)H PO4]. (csircentral.net)
Collagen fibers1
- Recently, hydroxyapatite/collagen composites have received much attention in the field of tissue reconstruction, because human bone is mainly composed of hydroxyapatite and collagen fibers. (techconnect.org)
Biphasic calcium2
- The biphasic calcium sulfate overcomes its predecessors by providing moldability and cementability properties even in the harsh environment of blood and saliva. (bauersmiles.com)
- The idea behind the development of biphasic calcium sulfate was to avoid adding any additives, polymers, or accelerators in order not to change or interfere with the purity of the material and its efficient and known clinical characteristics. (bauersmiles.com)
Crystalline4
- citation needed] ACP lacks the long-range, periodic atomic-scale order of crystalline calcium phosphates. (wikipedia.org)
- Hydroxyapatite (HAP, Ca 10 (PO 4 ) 6 (OH) 2 ) has a hexagonal prismatic structure that exposes two crystalline surfaces: prism-faceted a- and basal-faceted c-surfaces. (osti.gov)
- article{osti_1543698, title = {Effects of Controlled Crystalline Surface of Hydroxyapatite on Methane Oxidation Reactions}, author = {Oh, Su Cheun and Xu, Jiayi and Tran, Dat T. and Liu, Bin and Liu, Dongxia}, abstractNote = {Hydroxyapatite (HAP, Ca10(PO4)6(OH)2) has a hexagonal prismatic structure that exposes two crystalline surfaces: prism-faceted a- and basal-faceted c-surfaces. (osti.gov)
- This transformation is reversible, with gypsum or calcium sulfate hemihydrate forming anhydrite by heating to ~200°C under normal atmospheric conditions.The hemihydrate phase has two different forms, alpha and beta, that differ by their crystalline structure and their hardness. (bauersmiles.com)
Chitosan2
- Hydroxyapatite-chitosan/gelatin (HA:Chi:Gel) nanocomposite scaffold has potential to serve as a template matrix to regenerate extra cellular matrix of human bone. (csircentral.net)
- 2015 ) prepared a hydroxyapatite/chitosan (HAP/CS) porous material with a pore size of 100 ~ 300mm to adsorb Pb 2+ , and its maximum adsorption capacity was 264.42 mg/g. (researchsquare.com)
Silica6
- Six groups with different hydroxyapatite whiskers mass fractions were taken into account in order to be compared with the performances of silica particles based composites group. (hindawi.com)
- Data obtained show better interfacial interaction with filler/matrix until 20 wt% of hydroxyapatite whiskers partially replaced silica particles filler. (hindawi.com)
- In fact, it was shown that the incorporation of hydroxyapatite with whiskers morphology can provide larger load transfer and favor toughening mechanisms, thus, increasing flexural modulus and fracture toughness of resins in comparison with conventional silica based fillers [ 6 - 11 ]. (hindawi.com)
- This information is of primary interest in order to achieve a final consistency and specific formulation of hydroxyapatite whiskers mixed with silica particles filler in resin composite. (hindawi.com)
- In particular, six different ratios of hydroxyapatite/silica particles were investigated. (hindawi.com)
- With this aim, different mass fraction of hydroxyapatite based composites and three commercial composites loaded with silica particles were tested and compared in order to verify the effective enhancement in both biocompatibility and mechanical properties. (hindawi.com)
Adsorption2
- 2004 ) used calcined hydroxyapatite to adsorb Pb 2+ , Zn 2+ and Cu 2+ , and found that at pH 5, the adsorption capacity of HAP on Pb 2+ , Zn 2+ and Cu 2+ were 85.6, 29.8 and 20.6 mg/L, respectively. (researchsquare.com)
- 14] Yea X., Liua T., Li Q., Liua H., Wu Z., Comparison of Strontium and Calcium Adsorption Onto Composite Magnetic Particles Derived from Fe 3 O 4 and Bis(trimethoxysilylpropyl) amine , Colloids Surf . (nsmsi.ir)
Biocompatible1
- Calcium sulfate is highly biocompatible and, since it is entirely replaced by bone, is biodegradable, having the ability to promote bone formation. (bauersmiles.com)
Implants2
- 11 Calcium phosphate-coated implants have been described in the literature which demonstrate early direct bone attachment to the hydroxyapatite surface and this occursas quickly as one month post-operatively. (com.pk)
- Indeed, in a study originally aimed to show that the bonding phenomenon is chemical in nature, surface topography changes in the micrometer range were observed in hydroxyapatite ceramic implants, suggesting that micromechanical interlocking contributed to the bonding mechanism [8]. (toysis.pics)
Polymer3
- In addition, hydroxyapatite whiskers (wHA) have been considered the best option as reinforcing filler in comparison with other whiskers based on carbon, ceramic, glass, metal, and polymer due to the absence of cytotoxicity effects [ 12 , 13 ]. (hindawi.com)
- Beside copolymerization, polymer composites have been explored in order to improve mechanical property and biocompatibility. (hindawi.com)
- Zhang and Ma have developed [ 25 ] a highly porous biodegradable polymer/apatite composite scaffold (95% porosity) through a thermally induced phase separation technique, which resulted in significant improvement in mechanical properties compared to polymer-only scaffold. (hindawi.com)
Cement2
- Such mixtures are also known as calcium phosphate cement. (wikipedia.org)
- When using calcium sulfate in its hemihydrate phase, it has cement properties. (bauersmiles.com)
Biocompatibility6
- A systematic evaluation of mechanical and biocompatibility properties of different volume fractions of hydroxyapatite whiskers in comparison with three commercial dental composites filled with micro- and nanosilica particles was carried out. (hindawi.com)
- In addition, biocompatibility test showed less cytotoxic effect with the addition of 20 wt% of hydroxyapatite in comparison with higher rates. (hindawi.com)
- To overcome the present lack in the literature about hydroxyapatite based composite, we proposed a systematic analysis of the mechanical and biocompatibility performances of them in comparison with commercial dental composite. (hindawi.com)
- The aim of this study was to investigate the microstructure, microhardness and biocompatibility properties of nano hydroxyapatite (HA) doped with a constant yttrium (Y3+) and varying fluoride (F-) compositions. (metu.edu.tr)
- The current study focused on doping of hydroxyapatite (HA) with constant yttrium (Y3+) and varying fluoride (F-) compositions to investigate its microstructure, microhardness, and biocompatibility. (metu.edu.tr)
- The composite materials were characterized by several techniques (IR, XRD, SEM, TGA, ICP, and BET) and their antibacterial activity as well as their biocompatibility in a mammalian model system were investigated. (bvsalud.org)
Whiskers1
Enamel4
- Studies have shown that it does form a remineralized phase of hydroxyapatite consistent with the natural enamel. (wikipedia.org)
- As the main biomineral component in enamel and dentine, hydroxyapatite is responsible for their higher mechanical performances. (hindawi.com)
- Application of 50% ortho phosphoric acid for 60 seconds to enamel surface results in formation of a mono calcium phosphate monohydrate precipitate that can be rinsed off. (onlinedentallearning.in)
- Bonding with conventional composites requires a sensitive and multi-step technique, which must be orderly and judiciously followed, aiming not to compromise the adhesive resistance of the orthodontic accessories to the tooth enamel, requiring an operative field, free of moisture and without contamination [ 6 ]. (opendentistryjournal.com)
Situ2
- In this research, Zeolitic Imidazolate Framework 8 (ZIF-8), a zinc-based MOF, was selected together with cellulose, an almost inexhaustible polymeric raw material produced by nature, to prepare cellulose/ZIF-8 composite flat sheets via an in-situ growing single-step method in aqueous media. (bvsalud.org)
- Composites with varied proportions of beta-Ca-3(PO4)(2) and ZnO were obtained through an in situ aqueous precipitation method under slightly basic (pH approximate to 8) conditions. (ua.pt)
Carbon3
- 2017 ) studied the magnetic hydroxyapatite-mixed oxidation of multi-walled carbon nanotubes (mHAP-oMWCNTs) to remove Pb 2+ in water, and the results showed that mHAP-oMWCNTs showed better performance than mHAP, mMWCNT and HAP-oMWCNTs. (researchsquare.com)
- 2013 ) prepared Si-CHAP by hydrothermally doping silicon carbon into hydroxyapatite. (researchsquare.com)
- A selective literature review was performed for carbon nanostructure composites in bone tissue engineering. (openorthopaedicsjournal.com)
Nanocomposites4
- Hydroxyapatite-glass nanocomposites. (dokumen.pub)
- Hydroxyapatite-YSZ nanocomposites. (dokumen.pub)
- Hydroxyapatite-Ti nanocomposites. (dokumen.pub)
- Hydroxyapatite-collagen nanocomposites. (dokumen.pub)
Chloride3
- At present the most frequent choice of ionic crosslinker is Calcium Chloride (CaCl 2 ) as it typically leads to rapid gelation due to its high solubility in aqueous solutions 21 . (nature.com)
- and the liquid consists of calcium chloride which is a setting accelerator and water-reducing agent in aqueous solution [ 12 ]. (biomedcentral.com)
- Title: Calcium chloride and sodium phosphate in neonatal parenteral nutrition containing TrophAmine: precipitation studies and aluminum content. (aablocks.com)
Monohydrate1
- Title: Citrate, not phosphate, can dissolve calcium oxalate monohydrate crystals and detach these crystals from renal tubular cells. (aablocks.com)
Composition3
- Following investigations into the composition of amorphous calcium phosphates precipitated under different conditions, Posner and Betts suggested in the mid-1970s that the structural unit of ACP was a neutral cluster Ca9(PO4)6. (wikipedia.org)
- Variation in the composition of calcium silicate-based pulp capping materials could influence the discoloration potential of some of these materials, thus affecting the color and aesthetic appearance of the coronal tooth structure. (biomedcentral.com)
- The hydrophilic composite Transbond Plus Color Change presents in its composition glass fluorosilicate as a fluoride source and the hydrophilic nature of the adhesive allows the diffusion of fluoride through the reticulated matrix cured in an aqueous medium [ 10 ]. (opendentistryjournal.com)
Surface1
- 6. Why "wet bonding" concept is accepted over "dry bonding" for bonding composites to dentin surface? (onlinedentallearning.in)
Mechanical3
- After this threshold, the mechanical performances decrease dramatically due to both the hydroxyapatite agglomerates formation and the low degree of resin conversion. (hindawi.com)
- Nowadays, in order to avoid limits affecting long-term durability of resin composites, dental materials companies are focusing their attention on the improvement of the mechanical and biological properties of filler. (hindawi.com)
- The presence of ZnO in the beta-Ca-3(PO4)(2) matrix yields denser microstructures and thus improves the mechanical features of sintered composites up to an optimal ZnO concentration beyond which it tends to exert an opposite effect. (ua.pt)
Ceramic3
- Evolution of ceramic composite hip prostheses. (dokumen.pub)
- The toughening mechanism in ceramic composite. (dokumen.pub)
- Fabrication of ceramic composites. (dokumen.pub)
Vitro3
- Méthodologie expérimentale : plans statistiques d'expérience, en particulier dans le domaine des biomatériaux (planification d'expériences in vitro et in vivo). (epfl.ch)
- Therefore the aim of this study was to evaluate in vitro the color change of coronal tooth structure after placing various calcium silicate-based materials in the pulp chamber in the presence or absence of blood. (biomedcentral.com)
- In vitro experiments withcardiac fibroblasts and H9c2 cells confirmed the exceptional biocompatibilityof BC-Ppy composites. (ibecbarcelona.eu)
Precipitation1
- Precipitation from a moderately supersaturated and basic solution of a magnesium salt produces amorphous magnesium calcium phosphate (AMCP), in which magnesium incorporated into the ACP structure. (wikipedia.org)
Tissue1
- Unfolded phosphopeptides are believed to sequester ACP nanoclusters and form stable complexes in other biofluids such as urine and blood serum, preventing deposition of insoluble calcium phosphates and calcification of soft tissue. (wikipedia.org)
Biofilm2
- This approach is promising in order to prevent the major bacterial biofilm retention of resin composite which is the main reason of secondary caries insurgence and then restoration failure [ 14 ]. (hindawi.com)
- These adhesives have acetone or ethanol as solvents that can move and diffuse through the biofilm to reach hydroxyapatite and promote adequate adhesion after polymerization. (opendentistryjournal.com)
Magnesium1
- Title: Budget-impact model for colonoscopy cost calculation and comparison between 2 litre PEG+ASC and sodium picosulphate with magnesium citrate or sodium phosphate oral bowel cleansing agents. (aablocks.com)
Strontium2
- In this work, a strontium-doped hydroxyapatite (Sr-HAP) was synthesized by the sol-gel method. (researchsquare.com)
- TEOS xerogel was investigated as adsorbent to removal strontium ion from aqueous solution in batch operations. (nsmsi.ir)
Silicon2
- Silicon-substituted hydroxyapatite. (cam.ac.uk)
- The tribological properties of gas pressure sintered SiAlON and its composite with 18 wt% silicon carbide (SiC) against two different mating materials, i.e., alumina and SiAlON are evaluated. (bilecik.edu.tr)
Vivo1
- It has been demonstrated that ACP has better osteoconductivity and biodegradability than tricalcium phosphate and hydroxyapatite in vivo. (wikipedia.org)
Cellulose1
- As these pathogens are of primary importance in skin diseases and in the delayed healing of wounds, and the cellulose/ZIF-8 composites met the requirements of biological safety, the herein materials reveal a great potential for use as gauze pads in the management of wound infections. (bvsalud.org)
Materials1
- Moreover, unlike other aesthetic adhesive materials, such as composite resins, adhesion to dental structures of GIC is less sensitive to technique and its quality increases with time 10 . (bvsalud.org)
Properties4
- For wHA filled composite resins, several efforts are still necessary to enhance the interphase combination and investigate the overall properties [ 8 ]. (hindawi.com)
- Chemical Properties of Calcium Phosphate" Encyclopedia , https://encyclopedia.pub/entry/31249 (accessed December 02, 2023). (encyclopedia.pub)
- Hydroxyapatite: Structure and properties. (dokumen.pub)
- The advantage of using calcium sulfate in its hemihydrate form is its cementlike properties. (bauersmiles.com)
Biomimetic2
- Why ( and how ) did researchers of the previous century use blood plasma-like synthetic biomineralization solutions , instead of distilled or deionized water, to synthesize biomimetic calcium phosphates? (cuneyttas.com)
- How to synthesize calcium phosphates in biomimetic saline solutions, over the pH range of 9 to 12.5 , without adding any strong base such as NH 4 OH, NaOH or KOH? (cuneyttas.com)
Versus1
- Title: Comparison of patient acceptance of sodium phosphate versus polyethylene glycol plus sodium picosulfate for colon cleansing in Japanese. (aablocks.com)
Adhesive3
- To evaluate the adhesive strength of a hydrophilic composite submitted to contamination and pH cycling, compared to a conventional composite. (opendentistryjournal.com)
- However, the adhesive strength of the conventional composite was higher. (opendentistryjournal.com)
- At the end of the evaluation, there were only 3 bonding failures in each group, indicating similar adhesive strength of both composites used. (opendentistryjournal.com)
Carbonate1
- Calcium sulphate (CaSO 4 ) and calcium carbonate (CaCO 3 ) are the other two popular choices of crosslinkers, however due to their lower solubility within an aqueous solution the gelation time is slower. (nature.com)
Solution1
- Calcium sulfate hemihydrate transforms into dihydrate when it encounters water or aqueous solution, forming a solid mass in a process called setting. (bauersmiles.com)
Scaffold1
- The composite scaffold having 70% porosity with pore size distribution of 35-150m exhibited a compressive strength of 3.3-3.5MPa, which is within the range of that exhibited by cancellous bone. (csircentral.net)
Phase2
- A two-phase aqueous-organic system was used to degrade benzene, toluene and phenol, individually and as mixture by Pseudomonas putida F1 (ATCC 700007). (metu.edu.tr)
- Thus the defect will always be implanted with the calcium dihydrate form during the post-setting phase. (bauersmiles.com)
Resin2
- MTT quantitative colorimetric assay was performed in order to evaluate the mitochondrial activity of living cells exposed to different resin composites. (hindawi.com)
- 5. Why immediate bond strength of composite resin restoration is important for success of the restoration? (onlinedentallearning.in)