• magnesium inhibits octacalcium phosphate and apatite but

    Magnesium Inhibits Octacalcium Phosphate and Apatite but Magnesium has been recommended for prophylactic use in urolithiasis since Mg is known to inhibit in vitro apatite formation and stabilizes amorphous calcium-magnesium-phosphate (ACMP) (1).

  • Magnesium Inhibits Octacalcium Phosphate and Apatite but

    Magnesium has been recommended for prophylactic use in urolithiasis since Mg is known to inhibit in vitro apatite formation and stabilizes amorphous calcium-magnesium-phosphate (ACMP) (1).

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  • The Role of Brushite and Octacalcium Phosphate in Apatite

    1992-01-01· In more acidic solutions phases such as dicalcium phosphate dihydrate (Brushite, DCPD) and octacalcium phosphate (OCP) are often found. Even under ideal HAP precipitation conditions the precipitates are generally nonstoichiometric, suggesting the formation of calcium-deficient apatites. Both DCPD and OCP havea been implicated as possible precursors to the formation of apatite. This may

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  • Biomimetic calcium phosphate coatings on Ti6Al4V: a

    When Mg 2+ was added into this SBF, the coating was composed of Ca-deficient apatite crystals, while the addition of HCO 3 − in SBF led to the formation of a B-carbonated apatite layer. Magnesium and carbonate acted as inhibitors of crystal growth. The three phases obtained by our biomimetic process are closer to bone mineral structure than

  • Cited by: 271
  • Amorphous calcium phosphate Wikipedia

    Amorphous calcium phosphate (ACP or ATCP) is a glassy precipitate of variable composition that is formed in double decomposition reactions involving a soluble phosphate and calcium salts (e.g. (NH 4) 2 HPO 4 + Ca(NO 3) 2) performed under carefully controlled pH conditions. Such a mixture is also known as calcium phosphate cement.

  • Biomimetic calcium phosphate coatings on Ti6Al4V: a

    Octacalcium phosphate Ca 8 H 2 (PO 4) 6,5H 2 O (OCP), which participates in bone formation,2, 15 or B-carbonated apatite close to bone structure18 cannot be obtained by plasma spraying. However, these Ca-P phases seem to be particularly promising. Recently, several groups have focused their attention on a biomimetic approach for coating implants.

  • Cited by: 271
  • Amorphous calcium phosphate Wikipedia

    Amorphous calcium phosphate (ACP or ATCP) is a glassy precipitate of variable composition that is formed in double decomposition reactions involving a soluble phosphate and calcium salts (e.g. (NH 4) 2 HPO 4 + Ca(NO 3) 2) performed under carefully controlled pH conditions. Such a mixture is also known as calcium phosphate cement.

  • What bridges mineral platelets of bone?

    Commentary on: Davies E, Müller KH, Wong WC, Pickard CJ, Reid DG, Skepper JN, Duer MH. Citrate bridges between mineral platelets in bone. Proc Natl Acad Sci USA 2014;111:E1354–E1363.. The interactions between constituents of the bone composite, at the molecular level, have long been investigated for their potential role in the cohesion and mechanical properties of the tissue.

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  • Biomimetic calcium phosphate coatings on Ti6Al4V: a

    Octacalcium phosphate Ca 8 H 2 (PO 4) 6,5H 2 O (OCP), which participates in bone formation,2, 15 or B-carbonated apatite close to bone structure18 cannot be obtained by plasma spraying. However, these Ca-P phases seem to be particularly promising. Recently, several groups have focused their attention on a biomimetic approach for coating implants.

  • onlinelibrary.wiley

    Calcium phosphate (Ca‐P) coatings have been applied onto titanium alloys prosthesis to combine the srength of metals with the bioactivity of Ca‐P. It has been clearly shown in

  • Diagnosis and Clinical Manifestations of Calcium

    several types of crystals, including carbonated-apatite, octacalcium phosphate, and apatite-containing magnesium (whitlockite) crystals.3 The type of calcium-containing crystal depends on the levels of extracellular inor-ganic pyrophosphate (ePPi) and extracellular inorganic phosphate (ePi). High ePPi

  • Roles of Fluoride on Octacalcium Phosphate and Apatite

    As fluoride is known to affect the biomineralization of calcium phosphates, we examined how the growth at 37 °C of octacalcium phosphate (OCP) and hydroxyapatite (HAp) on an amorphous calcium phosphate substrate is affected by low-dose fluoride (0–2 ppm) in metastable calcium phosphate solution. In the absence of fluoride, highly oriented plate-like OCP crystals grow on the substrate.

  • Protein content of human apatite and brushite kidney

    Calcium phosphate kidney stones include apatite (carbapatite or hydroxyapatite), brushite and octacalcium phosphate with the occurrence rate of apatite, 4-10%; brushite, 2-6%; and rarely octacalcium phosphate . A recent study has reported that the occurrence of calcium phosphate containing stones is increasing over time .

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  • Osteoclastic resorption of biomimetic calcium phosphate

    The ACP-coated disks then were processed further by incubation in calcium phosphate solutions to produce either crystalline carbonated apatite (CA) or octacalcium phosphate (OCP). The resorption behavior of these three biomimetic coatings was studied using osteoclast-enriched mouse bone-marrow cell cultures for 7 days. Cell-mediated degradation

  • Quantification of octacalcium phosphate, authigenic apatite

    Quantification of octacalcium phosphate, authigenic apatite and detrital apatite in coastal sediments using differential dissolution and standard addition J.

  • The effect of some inhibitors on the nucleation and

    Abstract. Mg, Sr and F ions acted as inhibitors of apatite formation when added to a calcification buffer separately or in combinations. The precipitation of apatite under the influence of apatite seeds was less susceptible to inhibition than were spontaneous nucleation and apatite formation catalyzed by sheep bone collagen, while the latter two were about equally susceptible.

  • Inhibitory Effect of Magnesium and Zinc on Crystallization

    2000-04-27· The effect of magnesium and zinc on the growth kinetics of a hydroxyapatite (0001) face in pseudophysiological solutions was investigated. The growth rates of the (0001) face were measured under various concentrations of magnesium or zinc using Moire phase shift interferometry coupled with surface observation by atomic force microscopy. The (0001) face grew not in a spiral growth mode but

  • Magnesium and osteoarthritis: from a new perspective

    Magnesium and osteoarthritis: from a new perspective. Magnesium (Mg) as an essential trace element in bone metabolism has been paid to great attention in recent years according to its osteogenic effect and critical role in bone mineralization process. However, the biological influence of Mg to cartilage metabolism had not been taken in consideration seriously, because articular cartilage is

  • Authigenic apatite and octacalcium phosphate formation due

    Authigenic apatite and octacalcium phosphate formation due to adsorption–precipitation switching across estuarine salinity gradients J. F. Oxmann1 and L. Schwendenmann2 1GEOMAR Helmholtz Centre for Ocean Research Kiel, Marine Biogeochemistry, 24148 Kiel, Germany 2School of Environment, The University of Auckland, Auckland 1010, New Zealand

  • Biomimetic calcium phosphate coatings on Ti6Al4V: a

    From SBF containing only Ca2+ and HPO42− ions, an octacalcium phosphate layer grew epitaxially on the substrate. When Mg2+ was added into this SBF, the coating was composed of Ca-deficient apatite crystals, while the addition of HCO3− in SBF led to the formation of a B-carbonated apatite layer. Magnesium and carbonate acted as inhibitors of crystal growth. The three phases obtained by our

  • Pyrophosphate-Inhibition of Apatite Formation Studied by

    The pathways to crystals are still under debate, especially for materials relevant to biomineralization, such as calcium phosphate apatite known from bone and teeth. Pyrophosphate is widely used in biology to control apatite formation since it is a potent inhibitor of apatite crystallization. The impacts of pyrophosphate on apatite formation and crystallization kinetics are, however, not fully

  • Biological and Medical Significance of Calcium Phosphates

    1. Introduction Calcium phosphates are the most important inorganic constituents of biological hard tissues. In the form of carbonated hydroxyapatite (HA), they are present in bone,

  • Synthesis and enhanced bone regeneration of carbonate

    Abstract. Using a wet method, we have synthesized octacalcium phosphate carbonate, in which HPO 4 2− in octacalcium phosphate is replaced with CO 3 2−.The physical, crystal, and chemical properties of this new material were compared to octacalcium phosphate, Ca-deficient hydroxyapatite, and Ca-deficient carbonate apatite using X-ray diffraction, Fourier-transform infrared spectroscopy

  • Phase Transformation of Octacalcium Phosphate in vivo and

    Octacalcium phosphate (OCP) was implanted in both thigh muscle pouches of ddY-mice for 3 weeks, and was soaked in a simulated body fluid (SBF) and 1% NaCl solution maintained at 37°C for 1 day, 1 week and 3 weeks. After implantation or soaking, the specimens were characterized by scanning electron

  • Fluoridated Ca-Deficient Apatite Formed Via Octacalcium

    It has been shown that fluoride ions enhance OCP hydrolysis into Ca-deficient apatite and that fluoridation in hydroxyapatite (HA) affects osteoblast activity. The present study was designed to investigate whether fluoridated Ca-deficient apatite (F-HA) formed via OCP enhances bone regeneration. F-HA was obtained through hydrolysis of the OCP in a solution containing 2 ppm fluoride at 37 °C

  • Roles of Fluoride on Octacalcium Phosphate and Apatite

    As fluoride is known to affect the biomineralization of calcium phosphates, we examined how the growth at 37 °C of octacalcium phosphate (OCP) and hydroxyapatite (HAp) on an amorphous calcium phosphate substrate is affected by low-dose fluoride (0–2 ppm) in metastable calcium phosphate solution. In the absence of fluoride, highly oriented plate-like OCP crystals grow on the substrate.