Calcium Hydroxyapatite and How to Best Protect Your Bones

Jul 15, 2020Calcium hydroxyapatite contains the amino acids, phosphate, and other essential minerals that human bones need. Calcium hydroxyapatite’s similarity to the composition of natural bone allows for optimal bioavailability and stability over other calcium phosphate ingredients. The calcium found in calcium hydroxyapatite is superior to other

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Hydroxyapatite Ca5HO13P3 PubChem

Calcium tribasic phosphate. hydroxyl apatite. Calcium hydroxide phosphate (Ca5(OH)(PO4)3) Alveograf (TN) Decacalcium hexaphosphate dihydroxide. EINECS 235-330-6. Microcrystalline Hydroxyapatite Concentrate. EC 235-330-6. 5Ca.3PO4.HO. Calcium hydroxide phosphate (Ca10(OH)2(PO4)6) HYDROXYLAPATITE, CERAMIC. CHEMBL2218916. calcium hydroxide

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Hydroxyapatite Wikipedia

OverviewChemical synthesisCalcium-deficient hydroxyapatiteBiological functionUsesChromatographyUse in archaeologyDefluoridation

Hydroxyapatite, also called hydroxylapatite (HA), is a naturally occurring mineral form of calcium apatite with the formula Ca5(PO4)3(OH), but it is usually written Ca10(PO4)6(OH)2 to denote that the crystal unit cell comprises two entities. Hydroxyapatite is the hydroxyl endmember of the complex apatite group. The OH ion can be replaced by fluoride, chloride or carbonate, producing fluorapatite or chlorapatite. It crystallizes in the hexagonal crystal system. Pure hydroxyapatite po

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(PDF) Controlled Crystallization of Calcium Phosphate Apatites

Aug 04, 2000In seed-assisted precipitation tests (Ca/P = 1) the metastable calcium phosphate solution (37.5 mmol/L) was neutralized until the precipitation pH of 5 was reached and 10 g/L of seed was added.

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Apatite Wikipedia

OverviewGeologyUsesThermodynamicsLunar scienceBio-leachingSee also

Apatite is a group of phosphate minerals, usually referring to hydroxyapatite, fluorapatite and chlorapatite, with high concentrations of OH ,F and Cl ions, respectively, in the crystal. The formula of the admixture of the three most common endmembers is written as Ca10(PO4)6(OH,F,Cl)2, and the crystal unit cell formulae of the individual minerals are written as Ca10(PO4)6(OH)2, Ca10(PO4)6F2 and Ca10(PO4)6Cl2.

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Hydroxyapatite (HAP) / Phosphate tricalcique (TCP) SICT

Les phosphates de calcium composent la partie minérale du tissu osseux chez les mammifères. Il existe différents types de phosphate de calcium : Apatite : Hydroxyapatite Chloroapatite Fluoroapatite Phosphate tricalcique (a et b) Les propriétés chimiques des phosphates de calcium, donc leur comportement en solution, sont directement fonction de leur composition, c’est-à-dire de

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The role of intracellular calcium phosphate in osteoblast

The role of intracellular calcium phosphate in osteoblast-mediated bone apatite formation Suwimon Boonrungsimana, Eileen Gentlemana,b,c, Raffaella Carzanigad, Nicholas D. Evansa,b,1, David W. McComba,e, Alexandra E. Portera,2, and Molly M. Stevensa,b,f,2 Departments of aMaterials and fBioengineering, bInstitute of Biomedical Engineering, and

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Apatite — Wikipédia

Super-groupe de l’apatite. Elle sert de chef de file à un groupe de minéraux isostructuraux de formule générale : A 5 (XO 4) 3 Z q. Dans lesquels le calcium est remplacé par du strontium, cérium, manganèse, yttrium, plomb et le phosphore est remplacé par l'arsenic, le vanadium, le soufre, le silicium...

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A Woman with Recurrent Calcium Phosphate Kidney Stones

Kidney stones composed predominantly (50% or more) of calcium phosphate constitute up to 10% of all stones and 15%–20% of calcium stones, 80% of which are composed of calcium oxalate. Calcium phosphate is a minor component of up to 30% of calcium oxalate stones as well. The cause of calcium phosphate stones is often obscure but most often related to a

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Hydroxyapatite — Wikipédia

L'hydroxyapatite ou hydroxylapatite (HA) est une espèce minérale de la famille des phosphates, de formule Ca 5 (PO 4) 3 (OH), usuellement écrite Ca 10 (PO 4) 6 (OH) 2 pour souligner le fait que la maille de la structure cristalline comprend deux molécules. L'hydroxyapatite est le membre hydroxylé du groupe apatite.L'ion OH − peut être remplacé par le fluor, le chlore ou

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(PDF) Controlled Crystallization of Calcium Phosphate Apatites

In seed-assisted precipitation tests (Ca/P = 1) the metastable calcium phosphate solution (37.5 mmol/L) was neutralized until the precipitation pH of 5

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The Role of Brushite and Octacalcium Phosphate in Apatite

Studies of apatite mineral formation are complicated by the possibility of forming several calcium phosphate phases. The least soluble, hydroxyapatite (HAP), is preferentially formed under neutral or basic conditions.

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Calcium Phosphate Mineral an overview ScienceDirect Topics

13.4 Calcium Phosphate Cements with Biomedical Applications. The major interest in calcium phosphate cements has always been in their potential for biomedical applications. This is because bone contains hydroxyapatite [Ca 5 (PO 4) 3 OH], a calcium phosphate mineral. Any material that could be used to bond bone or produce an artificial graft

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Phosphate vs Apatite What's the difference? WikiDiff

As nouns the difference between phosphate and apatite is that phosphate is (chemistry) any salt or ester of phosphoric acid while apatite is (mineral) a calcium fluoride phosphate of variable composition, sometimes used in the manufacture of fertilizer. As a verb phosphate is to treat or coat with a or with phosphoric acid.

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Thin film of low-crystalline calcium phosphate apatite

Jun 01, 20001. Introduction. Calcium phosphate (Ca-P) apatite has been well known to have good properties as a biomaterial for bone repair, augmentation, substitution, and surface coating,, .Coating the surfaces of dental and orthopedic materials with biocompatible calcium phosphate apatite can elicit favorable biological and chemical responses on the surfaces and this can

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Evolution of Amorphous Calcium Phosphate to Hydroxyapatite

Amorphous calcium phosphate (ACP) is an important intermediate phase during the biomineralization of apatite. But the detailed mechanism of transformation from ACP to crystallized hydroxyapatite (HAP) is still unclear. Gold nanoparticles are used as ex-situ probes to monitor the detailed evolution process of ACP in vitro. The rearrangement of gold

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Category:Apatite Wikimedia Commons

Jan 05, 2019Apatite in calcite Calcium fluhydroxy carnoate and phosphate Magnet Cove Hot Springs County Arkansas 2278.jpg 750 × 750; 77 KB Apatite on Siderite (13156440584).jpg 2,913 × 2,088; 918 KB Apatite Ontario.jpg 3,898 × 2,859; 4.88 MB

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APATITE (Calcium (Fluoro-, Chloro-, Hydroxyl-) Phosphate)

THE MINERAL APATITE. Chemistry: Ca5(PO4)3(OH,F,Cl), Calcium (Fluoro, Chloro, Hydroxyl) Phosphate Class: Phosphates; Group: Apatite; Uses: as a source of phosphorous to be used in fertilizer, rarely as a gemstone and as a mineral specimen. Specimens

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What Is Calcium Hydroxyapatite? (with pictures)

Aug 30, 2020Calcium hydroxyapatite, or simply hydroxyapatite, is a mineral that belongs to a group of phosphate minerals known as apatites. It is usually identified with the teeth and bones of humans. In fact, this mineral is a major component of these structures. Hydroxyapatite can be found in the tooth enamel.

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A Woman with Recurrent Calcium Phosphate Kidney Stones

Kidney stones composed predominantly (50% or more) of calcium phosphate constitute up to 10% of all stones and 15%–20% of calcium stones, 80% of which are composed of calcium oxalate. Calcium phosphate is a minor component of up to 30% of calcium oxalate stones as well. The cause of calcium phosphate stones is often obscure but most often related to a

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Calcium phosphate coatings for medical implants K de

Driessens, F. C. M. Formation and stability of calcium phosphate in relation to the phase composition of mineral in calcified tissue. In Bioceramics of Calcium Phosphate (Ed. de Groot, K. ), 1983, pp. 1 32 (CRC Press, Boca Raton, Florida, USA). Google Scholar

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Diagnosis and clinical manifestations of calcium

Basic calcium phosphate and pyrophosphate calcium crystals are the 2 main calcium-containing crystals that can deposit in all skeletal tissues. These calcium crystals give rise to numerous manifestations, including acute inflammatory attacks that can mimic alarming and threatening differential diagn

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(PDF) A Review on the Thermal Stability of Calcium Apatites

The multifunctionality of calcium apatite is attributed to a large capability for elemental substitution, the active sur- face and a range in crystal perfection (low to high crys-

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Apatite Formation from Amorphous Calcium Phosphate and

Jul 27, 2016The speciation of phosphate was controlled by pH to favor HPO 4 2−. In a carbonate free system, the reaction produces anisotropic apatite crystallites with large aspect ratios. The first formed crystallites are highly calcium deficient and hydrogen phosphate rich, consistent with thin octacalcium phosphate (OCP)‐like needles.

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Calcium Phosphate Mineral an overview ScienceDirect Topics

13.4 Calcium Phosphate Cements with Biomedical Applications. The major interest in calcium phosphate cements has always been in their potential for biomedical applications. This is because bone contains hydroxyapatite [Ca 5 (PO 4) 3 OH], a calcium phosphate mineral. Any material that could be used to bond bone or produce an artificial graft

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Influence of apatite seeds on the synthesis of calcium

This preliminary study explores the seeding effect (using crystalline hydroxyapatite particles) on the setting time, compressive strength, phase evolution, and microstructure of calcium phosphate cements (CPC) based on monocalcium phosphate monohydrate and calcium hydroxide. Experimental results sho

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Diagnosis and clinical manifestations of calcium

Basic calcium phosphate and pyrophosphate calcium crystals are the 2 main calcium-containing crystals that can deposit in all skeletal tissues. These calcium crystals give rise to numerous manifestations, including acute inflammatory attacks that can mimic alarming and threatening differential diagn

get price

Apatite Formation from Amorphous Calcium Phosphate and

Jul 27, 2016The speciation of phosphate was controlled by pH to favor HPO 4 2−. In a carbonate free system, the reaction produces anisotropic apatite crystallites with large aspect ratios. The first formed crystallites are highly calcium deficient and hydrogen phosphate rich, consistent with thin octacalcium phosphate (OCP)‐like needles.

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Apatite and Octa-Calcium Phosphate: Effects of Carbon

Octa-calcium phosphate forms instead of apatite under a high partial pressure of CO2in solution almost neutral in pH, containing chloride ions or wholly lacking halogens. However, in solutions containing fluoride ions, apatite forms under the same conditions. Fluoride also increase the crystallinity of the formed apatite.

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What Is Calcium Hydroxyapatite? (with pictures)

Aug 30, 2020Calcium hydroxyapatite, or simply hydroxyapatite, is a mineral that belongs to a group of phosphate minerals known as apatites. It is usually identified with the teeth and bones of humans. In fact, this mineral is a major component of these structures. Hydroxyapatite can be found in the tooth enamel.

get price

Calcium phosphate coatings for medical implants K de

Driessens, F. C. M. Formation and stability of calcium phosphate in relation to the phase composition of mineral in calcified tissue. In Bioceramics of Calcium Phosphate (Ed. de Groot, K. ), 1983, pp. 1 32 (CRC Press, Boca Raton, Florida, USA). Google Scholar

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Hydroxyapatite reagent grade, powder, synthetic

Hydroxyapatite reagent grade, powder, synthetic Synonym: Calcium hydroxyphosphate, Calcium phosphate tribasic, HAp, Hydroxylapatite, Tribasic calcium phosphate CAS Number 12167-74-7. Linear Formula [Ca 5 (OH)(PO 4) 3] x. Molecular Weight 502.31 . EC Number 235-330-6. MDL number MFCD00010904. PubChem Substance ID 57648308.

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Comparative Critical Study of Commercial Calcium Phosphate

Physico-chemical characteristics impact directly or indirectly the bioactive properties of biomaterials, it is then essential to correlate it with their effect in vivo. A panel of biomaterials available on the market, based on Hydroxyapatite (HA) and Tricalcium phosphate (β-TCP) is studied in terms of surface area, hydrophilicity, porosity, zeta potential, crystalline phases and

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(PDF) A Review on the Thermal Stability of Calcium Apatites

The multifunctionality of calcium apatite is attributed to a large capability for elemental substitution, the active sur- face and a range in crystal perfection (low to high crys-

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MERN Apatite : propriétés, usages et types de gisement

La brushite (CaHPO 4 2 H 2 O) constitue une variété hydroxylée de phosphate de calcium tandis que la monétite (CaHPO 4) est une variété de phosphate de calcium non hydraté. Usages. L’apatite contient plus de 41 % d’oxyde de phosphore (P 2 O 5), ce qui en fait la source la plus importante de phosphate. Elle est aussi l’un des trois

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Basic calcium phosphate (BCP) crystal arthritis, including

Jul 31, 2018The terms "calcium phosphate" and "hydroxyapatite" are often used synonymously with the more accurate term "basic calcium phosphate." BCP crystals are similar in composition to both the normal mineral found in bones and teeth and the pathologic mineral found in atherosclerotic plaques and calcinosis cutis.

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Push-Out Bond Strength of Experimental Apatite Calcium

Recently, a novel apatite calcium phosphate coated gutta-percha (HAGP) was produced to enhance the adhesion of GP cones to root sealers, and subsequently to root dentine . Theoretically, using bioactive hydroxyapatite can lead to the deposition of inorganic particles on the root surface during the degradation process, thereby increasing sealing

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Calcium phosphate uroliths (hydroxyapatite, brushite

CANINE CALCIUM PHOSPHATE Calcium phosphate uroliths (hydroxyapatite, brushite, whitlockite, and octacalcium phosphate) are uncommon in dogs. Common conditions associated with these minerals include hypercalcemia, hyperparathyroidism, hypervitaminosis D, and dystrophic and ectopic mineralization of vital tissues (blood clots, urothelium, etc.).

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