• 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)
  • 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)
  • Calcium sulfate is highly biocompatible and, since it is entirely replaced by bone, is biodegradable, having the ability to promote bone formation. (bauersmiles.com)
  • In this study, we develop an integrated process for the direct recovery and separation of dicalcium phosphate dihydrate for fertilizer and livestock feed additive production from a low-grade (2.0 wt% P) iron-rich (19.7 wt% Fe) phosphate ore. (rsc.org)
  • The developed process achieves around 70% phosphorus recovery as an industrial-grade (19 wt% P) dicalcium phosphate dihydrate product with minimal iron, magnesium, and aluminum contamination, while also producing value-added calcium sulfate dihydrate (gypsum) and iron/magnesium byproducts. (rsc.org)
  • 40% P 2 O 5 ), while livestock feed additives are usually in the form of dicalcium phosphate (CaHPO 4 ), monocalcium phosphate (Ca(H 2 PO 4 ) 2 ), or defluorinated phosphate (Ca 3 (PO 4 ) 2 ). (rsc.org)
  • However concentration below 27% may create a dicalcium phosphate monohydrate that cannot be rinsed off. (onlinedentallearning.in)
  • Therefore, this study aimed to compare the changes in the volume of two different bone substitutes-one based on carbonate apatite and the other on octacalcium phosphate-used in maxillary sinus floor elevation. (bvsalud.org)
  • The immediate postoperative volume of octacalcium phosphate was 95.3775 mm3 per piece of grafting material used. (bvsalud.org)
  • Tetracalcium phosphate cannot be prepared in aqueous solution, any precipitates having the correct Ca/P ratio contain hydroxide ions in apatitic phases. (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)
  • Unwanted tetracalcium phosphate can be formed when metal alloy implants (orthopaedic and dental) are plasma spayed with hydroxyapatite. (wikipedia.org)
  • 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)
  • 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)
  • 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)
  • 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)
  • Thermochimie des solutions aqueuses: calculs de solubilité de composés inorganiques (phosphates, carbonates, oxalates. (epfl.ch)
  • 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)
  • 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)
  • 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)
  • 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)
  • Hydroxyapatite-PMMA composites. (dokumen.pub)
  • Hydroxyapatite-PS composites. (dokumen.pub)
  • Title: Citrate, not phosphate, can dissolve calcium oxalate monohydrate crystals and detach these crystals from renal tubular cells. (aablocks.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)
  • Hydroxyapatite-collagen nanocomposites. (dokumen.pub)
  • Re-wetting done with water or aqueous re-wetting agents will cause the collapsed collagen network to raise and restore its spatial configuration. (onlinedentallearning.in)
  • In the wet phosphoric acid process, the phosphate rock is reacted with sulfuric acid (H 2 SO 4 ), producing gypsum (CaSO 4 ·2H 2 O) and aqueous phosphoric acid (reaction (1) ). (rsc.org)
  • 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)
  • processing calcium carbonate caco3 wet milling Calcium Carbonate Mill Feed size ≤15 ≤25mm Discharge size 0.125 0.010mm Applications grinding processing calcium carbonate gypsum powder processing power plant desulfurization milling non metallic minerals coal preparation and so on. (hurtowniaanita.pl)
  • 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)
  • 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)
  • Vital pulp therapy has entered a golden era by the invention of mineral trioxide aggregate (MTA), which is based on Portland cement, whose components are tricalcium silicate, dicalcium silicate and tricalcium aluminate [ 1 ]. (biomedcentral.com)
  • Glass ionomer cements are available since the early 1970s 56 and are derived from silicate and zinc polycarboxylate cements. (bvsalud.org)
  • This reactive glass is similar to that existing in the silicate cements. (bvsalud.org)
  • 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)
  • Calcium sulfate is available in three different phases: i.e. hemihydrate (CaSO4 * 1/2H2O), dihydrate (CaSO 4 ·2H 2 O), and anhydride (CaSO 4 ). (bauersmiles.com)
  • Calcium sulfate hemihydrate transforms into dihydrate when it encounters water or aqueous solution, forming a solid mass in a process called setting. (bauersmiles.com)
  • In order to overcome the disadvantages of the dihydrate form of calcium sulfate, companies offer calcium sulfate in a post-setting form, i.e., dihydrate. (bauersmiles.com)
  • Thus the defect will always be implanted with the calcium dihydrate form during the post-setting phase. (bauersmiles.com)
  • 5. Rejda BV, Peelen JGJ, deGroot K: Tricalcium phosphate as a bone substitute. (ijcrr.com)
  • This paper discusses the processes of grit-blasting, plasma spraying, acid-etching, anodization and implant surface coatings with hydroxyapatite. (com.pk)
  • Effects of strontium-substitution in sputter deposited calcium phosphate coatings on the rate of corrosion of magnesium alloys. (pitt.edu)
  • 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)
  • As the main biomineral component in enamel and dentine, hydroxyapatite is responsible for their higher mechanical performances. (hindawi.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)
  • 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)
  • Phosphorus supplements are usually produced from high-grade phosphate rock concentrates (28-40 wt% P 2 O 5 ). (rsc.org)
  • The main role of phosphate supplements is to deliver soluble and bioavailable phosphorus to plants and livestock as crop fertilizers or animal feed additives. (rsc.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)
  • 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 this study, influence of blended cements produced with different types of pozzolans on rebar corrosion and high temperature resistance of concrete was investigated. (bilecik.edu.tr)
  • 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)
  • Due to its chemical, mechanical and biological properties, the glass ionomer cements (GIC) consist in one of the most versatile direct restorative materials, with many potential clinical indications, especially in the context of minimally invasive dentistry. (bvsalud.org)
  • Chemical Properties of Calcium Phosphate" Encyclopedia , https://encyclopedia.pub/entry/31249 (accessed December 02, 2023). (encyclopedia.pub)
  • When using calcium sulfate in its hemihydrate phase, it has cement properties. (bauersmiles.com)
  • The advantage of using calcium sulfate in its hemihydrate form is its cementlike properties. (bauersmiles.com)
  • Based on this finding, the polycarboxylate cements gained quickly popularity as cementing agents, but could not be used as restorative materials because of the high solubility of unsatisfactory mechanical properties and unacceptable aesthetics caused by residual zinc oxide. (bvsalud.org)
  • Bony union means the interlocking of the cement matrix of the bone with the properties of the underlying implant surface. (toysis.pics)
  • Hydroxyapatite: Structure and properties. (dokumen.pub)
  • Title: Comparison of patient acceptance of sodium phosphate versus polyethylene glycol plus sodium picosulfate for colon cleansing in Japanese. (aablocks.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)
  • Calcium sulfate is the graft material with the longest proven history in bone augmentation procedures. (bauersmiles.com)
  • Calcium phosphate monitoring and early supplementation is a protective factor against the development of osteopenia in very low birth weight infants. (bvsalud.org)
  • After this threshold, the mechanical performances decrease dramatically due to both the hydroxyapatite agglomerates formation and the low degree of resin conversion. (hindawi.com)
  • 1,4-6 The P 2 O 5 grade, mineral form, and calcium content of these products are critical for their effective performance in their target applications and their market value. (rsc.org)
  • The polycarboxylate cements were the first materials to provide adhesion to tooth structures, mainly produced by the polyacrylic acid to ensure their biocompatibility, because it is a weak and high molecular weight acid, which does not diffuse through the dentinal tubules. (bvsalud.org)
  • The process combines leaching using dilute sulfuric acid (0.29 M) and selective precipitation using calcium oxide. (rsc.org)
  • Stabilizing Highly Loaded Silicon Nitride Aqueous Suspensions Using Comb Polymer Concrete Superplasticizers. (speedmixer.uk)
  • In addition, biocompatibility test showed less cytotoxic effect with the addition of 20 wt% of hydroxyapatite in comparison with higher rates. (hindawi.com)
  • Tetracalcium phosphate is a component in some calcium phosphate cements that have medical applications. (wikipedia.org)
  • In 2016, a prevention strategy was implemented through calcium phosphate monitoring and early supplementation. (bvsalud.org)
  • 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)
  • Data obtained show better interfacial interaction with filler/matrix until 20 wt% of hydroxyapatite whiskers partially replaced silica particles filler. (hindawi.com)
  • 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)