Mechanisms of hydration of calcium phosphate cement

Wei Shen, Changsheng Liu, Yanfang Gu, Liming Hu

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Calcium Phosphate Cement (CPC) is a new kind of bone repair material. The mechanism of hydration of CPC was studied and some results were obtained. The hydration of CPC is based on the differences of solubility, of calcium phosphate salts. HAP is the least soluble phase when pH>4.2, so other calcium phosphate salts can dissolve and reprecipitate as HAP when suspended in an aquenous solution; when CPC is comprised of two kinds of calcium phosphate salts with different basicity or acidity, the pH value of the system will become stable by the neutralizing reaction of acidic and basic byproducts, so the promotion of hydration is maintained and the reacion can proceed to completion. The kinetics of hydration of CPC which consists of tetracalcium phosphate (TECP) and dicalcium phosphate anhydrous (DCPA) is initially controlled by the surface dissolution of DCPA, and eventually controlled by the rate of diffusion through the product layers.

Original languageEnglish (US)
Number of pages1
JournalWuji Cailiao Xuebao/Journal of Inorganic Materials
Volume11
Issue number4
StatePublished - Dec 1 1996
Externally publishedYes

Keywords

  • Calcium phosphate cement
  • Controlled by surface dissolution, controlled by diffusion
  • Hydration
  • Solubility

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