By Editor(s): Chow L.C. Eanes E.D.
The chemistry, constitution and organic significance of octacalcium phosphate (OCP) are completely mentioned during this quantity, which covers a large scope of issues appropriate to the sector of calcium phosphates in general.
The first bankruptcy reports the constructions of OCP and different vital calcium phosphates. it truly is by means of an outline of the mimicry of OCP development in vivo utilizing in vitro version structures and an intensive evaluate of OCP in organic structures. The notable skill of OCP to include biologically appropriate natural carboxylates into its constitution is additionally mentioned, besides the solubility and floor homes of calcium phosphate salts, and amorphous calcium phosphate and its dating to OCP. The final bankruptcy facilities at the rising know-how of calcium phosphate cements as bone illness fix fabrics.
The ebook presents in-depth, up to date details to all scientists learning calcium phosphate chemistry, biomineralization, pathological calcification, dental caries, biomaterials, and restoration of environmental phosphorus.
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39 (15 days to 6 months) during the maturation of the bone mineral. The last line of evidence given by Brown [1966] is the fact that lower crystal surface energy favors the formation of OCP in solutions supersaturated with respect to both OCP and OHAp even though the latter phase is thermodynamically the more stable of the two. 2 [Eanes and Meyer, 1977; Meyer and Eanes, 1978 a, b; Eanes, 1980]. Since 1966, reports on the presence of OCP in normal bones and teeth have been sparse. , 1963]. 43 - 9/24/2013 4:37:07 PM crystals grow laterally to confluence to form densely packed, parallel arrays of somewhat flattened hexagonal rods.
The morphology of the OCP crystals grown at various PO4 concentrations and pHs are listed in table 4. 4, elongated OCP growth was not strong resulting in flake-like crystals (fig. 7 a). 3, the morphology changed to short plate-like crystals (fig. 7 b), then to long plate-like crystals (fig. 6 b), and finally to ribbon-like crystals (fig. 7 c). 8. Thus, H+ ions effectively promoted growth in the c-axis direction. The ribbon-like crystals formed spherical aggregates (s in table 4) at pHs and/or PO4 con- centrations slightly higher than those at which no precipitation took place (N in table 4).
The membrane was attached to the opening of the small bottle, then placed in a larger bottle containing 300 ml of a PO4 solution [NH4H2PO4 + (NH4)2HPO4]. The reaction took place on the PO4 side of the membrane as the Ca2+ ions diffused into the PO4 solution through the membrane. a b Fig. 5. Schematic of the experimental membrane system used to model enamel crystal formation (b). Also shown for comparison is a sagittal representation of a tooth (a). 5 (fig. 6 a). 8 (fig. 5 (fig. 6 b, fig. , 1984; Iijima and Moriwaki, 1989, 1991].