Bone regeneration by synthetic octacalcium phosphate and its role in biological mineralization

O. Suzuki, H. Imaizumi, S. Kamakura, T. Katagiri

Research output: Contribution to journalReview articlepeer-review

86 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)305-313
Number of pages9
JournalCurrent Medicinal Chemistry
Issue number3
Publication statusPublished - 2008 Feb


  • Biomaterials
  • Biomineralization
  • Bone regeneration
  • Conversion
  • Hydroxypatite (HA)
  • Octacalcium phosphate (OCP)

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Medicine
  • Pharmacology
  • Drug Discovery
  • Organic Chemistry


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