Abstract
Octacalcium phosphate (Ca8H2(PO4)6.5H2O; OCP) has been advocated to be a precursor of biological apatite crystals in bone and tooth. Recent studies, using physical techniques, showed that OCP is present as a transient phase during biological apatite formation in human dentin, porcine enamel and murine bone. However, there is still a controversy regarding the chemical nature of the first mineral formed in the biominerals. A number of studies have demonstrated that synthetic OCP shows bone regenerative and biodegradable characteristics, rather than other calcium phosphate bone substitute materials, such as hydroxyapatite (Ca10(PO4)6(OH)2; HA) ceramic. It seems likely that synthetic OCP may be an alternative to autogenous bone graft. It is known that OCP contains alternative layers of water molecules and an apatite structure, and that the transition of OCP to HA is likely to be spontaneous and irreversible. The conversion process induces modification of local environment adjacent to OCP surface, including the changes in adsorption of serum proteins and concentration of calcium and inorganic phosphate ions. This article reviews the possible application to bone regeneration by synthetic OCP and the mechanism to enhance bone regeneration in relation to biological mineralization in bone and tooth.
Keywords: Octacalcium phosphate (OCP), hydroxyapatite (HA), conversion, biomineralization, biomaterials, bone regeneration
Current Medicinal Chemistry
Title: Bone Regeneration by Synthetic Octacalcium Phosphate and its Role in Biological Mineralization
Volume: 15 Issue: 3
Author(s): O. Suzuki, H. Imaizumi, S. Kamakura and T. Katagiri
Affiliation:
Keywords: Octacalcium phosphate (OCP), hydroxyapatite (HA), conversion, biomineralization, biomaterials, bone regeneration
Abstract: Octacalcium phosphate (Ca8H2(PO4)6.5H2O; OCP) has been advocated to be a precursor of biological apatite crystals in bone and tooth. Recent studies, using physical techniques, showed that OCP is present as a transient phase during biological apatite formation in human dentin, porcine enamel and murine bone. However, there is still a controversy regarding the chemical nature of the first mineral formed in the biominerals. A number of studies have demonstrated that synthetic OCP shows bone regenerative and biodegradable characteristics, rather than other calcium phosphate bone substitute materials, such as hydroxyapatite (Ca10(PO4)6(OH)2; HA) ceramic. It seems likely that synthetic OCP may be an alternative to autogenous bone graft. It is known that OCP contains alternative layers of water molecules and an apatite structure, and that the transition of OCP to HA is likely to be spontaneous and irreversible. The conversion process induces modification of local environment adjacent to OCP surface, including the changes in adsorption of serum proteins and concentration of calcium and inorganic phosphate ions. This article reviews the possible application to bone regeneration by synthetic OCP and the mechanism to enhance bone regeneration in relation to biological mineralization in bone and tooth.
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Cite this article as:
Suzuki O., Imaizumi H., Kamakura S. and Katagiri T., Bone Regeneration by Synthetic Octacalcium Phosphate and its Role in Biological Mineralization, Current Medicinal Chemistry 2008; 15 (3) . https://dx.doi.org/10.2174/092986708783497283
DOI https://dx.doi.org/10.2174/092986708783497283 |
Print ISSN 0929-8673 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-533X |
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