• One example of a hydroxyapatite cement forming reaction is that of tetracalcium phosphate and dicalcium diphosphate dihydrate: Ca4(PO4)2O + CaHPO4·2H2O → Ca5(PO4)3(OH) + 2 H2O Crystalline tetracalcium phosphate is monoclinic, and has close similarities to hydroxyapatite. (wikipedia.org)
  • Objective: to perform a histological analysis of nylon, carbon, and polypropylene fiber-enriched calcium phosphate cement (CPC) for use as bone substitute in the femur or rats. (bvsalud.org)
  • But due to shortcomings of autogenous bone material and the disadvantages of polyethylene or methylmethacrylate, hydroxyapatite cement (HAC) composed of tetracalcium phosphate and dicalcium phosphate seems to be an alternative. (acthe.fr)
  • The setting time of a calcium phosphate cement consisting of tetracalcium phosphate (TTCP) and dicalcium phosphate anhydrous (DCPA) was reduced from 30 to 5 min by use of a cement liquid that contained a phosphate concentration of 0.25 mol/l or higher. (elsevierpure.com)
  • The diametral tensile strength and conversion of the cement ingredients to hydroxyapatite (OHAp) during the first 3 h were also significantly increased by the phosphate. (elsevierpure.com)
  • However, the phosphate produced no significant effects on the properties of the 24-h cement samples. (elsevierpure.com)
  • Calcium Phosphate Cement (CPC) is a new kind of bone repair material. (umn.edu)
  • It is the most basic of the calcium phosphates, and has a Ca/P ratio of 2, making it the most phosphorus poor phosphate. (wikipedia.org)
  • 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)
  • The origin powder tetracalcium phosphate/nanomonetite agglomerates were coated with the thin layer of biopolymer which decelerates both the transformation rate of calcium phosphates and hardening process of composites. (sciendo.com)
  • The kinetics of hydration of CPC which consists of tetracalcium phosphate (TECP) and dicalcium phosphate anhydrous (DCPA) is initially controlled by the surface dissolution of DCPA, and eventually controlled by the rate of diffusion through the product layers. (umn.edu)
  • Tetracalcium phosphate is a component in some calcium phosphate cements that have medical applications. (wikipedia.org)
  • Tetracalcium phosphate is stable in water at room temperature for up to four weeks, but at higher temperatures hydrolyses to hydroxyapatite and calcium hydroxide: 3 Ca4(PO4)2O + 3 H2O → 2 Ca5(PO4)3(OH) + 2 Ca(OH)2 Tetracalcium phosphate is a component used in the formation of some hydroxyapatite calcium phosphate cements that used for the repair of bone defects. (wikipedia.org)
  • One example is the research on calcium phosphate cements, which have been extensively studied in the past years due to their potential suitability for biomedical applications 4,5 . (bvsalud.org)
  • Results from additional experiments in a slurry system verified that the high phosphate concentration in the solution accelerated the formation of OHAp in the TTCP + DCPA system, and this reaction could explain the fast-setting properties of the cements. (elsevierpure.com)
  • Bioceramic tetracalcium phosphate (TTCP) is used as a surface modifier on the implant surface and the clinical studies on this surface modification are still limited. (bvsalud.org)
  • Varying tissue responses can arise from decomposed phases such as α and β-tricalcium phosphate (TCP) and tetra-calcium phosphate (TTCP) as well as ACP which generally have higher solubility as compared to crystalline. (asminternational.org)
  • However, pure phases needed for calibration is scarce and amorphous calcium phosphate (ACP) is virtually impossible to isolate. (asminternational.org)
  • 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)
  • Buy Tetracalcium phosphate TECP from TNJ Chemical, China leading Tetracalcium phosphate factory suppliers offering best price. (tnjchem.com)
  • In vitro and in vivo degradation of biomimetic octacalcium phosphate and carbonate apatite coatings on titanium implants [J]. J Biomed Mater Res A, 2003, 64(2): 378387. (francis-press.com)
  • Prepared powder polyhydroxybutyrate - chitosan - calcium phosphate composite system with 10 wt % of biopolymer component can be utilized as biocement which is characterized by the prolonged setting time and achieves wash out resistance after 5 minutes of setting. (sciendo.com)
  • The stability of tetracalcium phosphate/titanium implants: A short-term follow-up study. (bvsalud.org)
  • Unwanted tetracalcium phosphate can be formed when metal alloy implants (orthopaedic and dental) are plasma spayed with hydroxyapatite. (wikipedia.org)
  • Preparation and bioactivity of microare oxidized calcium phosphate coatings [J]. Mater Chem Phys, 2013, 141(23): 842849. (francis-press.com)
  • Deposition of hydroxyapatite and tricaleium phosphate coatings by suspension plasma spraying: Effects of torch speed[J]. J Eur Ceram Soc, 2018, 38(16): 54895496. (francis-press.com)
  • Solid state reactions are used, one example is: 2 CaHPO4 + 2 CaCO3 → Ca4(PO4)2O + CO2 + H2O (1450-1500 °C for up to 12 hours) As tetracalcium phosphate is metastable the molten reaction mixture has to be quenched to rapidly, reduce the temperature and prevent the formation of other compounds such as Ca3(PO4)2, CaO, CaCO3 and Ca5(PO4)3(OH). (wikipedia.org)
  • Chemical Properties of Calcium Phosphate" Encyclopedia , https://encyclopedia.pub/entry/31249 (accessed December 02, 2023). (encyclopedia.pub)
  • This slag was used as a fertiliser due to the higher solubility of tetracalcium phosphate relative to apatite minerals. (wikipedia.org)
  • Greish, YE & Brown, PW 1999, ' Hydrolysis of tetracalcium phosphate in the presence of a poly(alkenoic acid) ', Journal of Materials Research , vol. 14, no. 12, pp. 4637-4642. (uaeu.ac.ae)
  • In vivo studies of titanium implant surface treatment by sandblasted, acidetched and further anchored with ceramic of tetracalcium phosphate on osseointegration [J]. J Aust Ceram Soc, 2019, 55 (3): 799806. (francis-press.com)
  • when CPC is comprised of two kinds of calcium phosphate salts with different basicity or acidity, the pH value of the system will become stable by the neutralizing reaction of acidic and basic byproducts, so the promotion of hydration is maintained and the reacion can proceed to completion. (umn.edu)
  • Tetracalcium phosphate cannot be prepared in aqueous solution, any precipitates having the correct Ca/P ratio contain hydroxide ions in apatitic phases. (wikipedia.org)
  • Unwanted tetracalcium phosphate can be formed when metal alloy implants (orthopaedic and dental) are plasma spayed with hydroxyapatite. (wikipedia.org)
  • The similarity is such that it has been suggested that there is an epitactic relationship between the structures enabling direct conversion of tetracalcium phosphate to hydroxyapatite. (wikipedia.org)
  • In vitro hydroxyapatite formation of a tetracalcium phosphate and anhydrous dicalcium phosphate based dentine desensitiser: TRIS buffer vs artificial saliva. (ijdm.co.in)
  • Using such morphoconstitutional studies leads to a classification of urinary stones in seven distinctive types and twenty-one subtypes among monohydrate (whewellite) and dihydrate (weddellite) calcium oxalates, phosphates, uric acid, urates, protein, and cystine calculi. (nih.gov)
  • Six different tetracalcium phosphate products were synthesized by solid state reaction at high temperature by varying the overall calcium to phosphate ratio of the synthesis mixture. (nist.gov)
  • Inspired by the sandcastle worm that creates a protective tubular shell around its body using a proteinaceous adhesive, a novel bone adhesive is introduced, based on tetracalcium phosphate and phosphoserine, that cures in minutes in an aqueous environment and provides high bone-to-bone adhesive strength. (nih.gov)
  • Tetracalcium phosphate cannot be prepared in aqueous solution, any precipitates having the correct Ca/P ratio contain hydroxide ions in apatitic phases. (wikipedia.org)
  • Solid state reactions are used, one example is: 2 CaHPO4 + 2 CaCO3 → Ca4(PO4)2O + CO2 + H2O (1450-1500 °C for up to 12 hours) As tetracalcium phosphate is metastable the molten reaction mixture has to be quenched to rapidly, reduce the temperature and prevent the formation of other compounds such as Ca3(PO4)2, CaO, CaCO3 and Ca5(PO4)3(OH). (wikipedia.org)
  • The aim of this study was to compare the biocompatibility of two new calcium phosphate - based root canal sealers (CPC-I, CPC-II) with a commercially available zinc oxide eugenol based-sealer [Pulp canal sealer EWT (PCS EWT)] and Sealapex after implantation in the subcutaneous tissue of rats. (madridge.org)