Osteoinduction of calcium phosphate and its application / 中国组织工程研究

ABSTRACT

BACKGROUND: With good biocompatibility, osteoconduction and biodegradability, calcium phosphate ceramics is considered as a substitute of autologous bone; furthermore, it also has the potentiel of osteoinduction after structure optimization. OBJECTIVE: To review the physicochemical properties of calcium phosphate ceramic and its osteoinduction. METHODS: A computer-based search of databases such as PubMed, Springer, ResearchGate and Baidu Academic was performed for articles relevant to calcium phosphate ceramics published from January 2000 to October 2015. And the keywords were “calcium phosphate, osteoinduction, tissue engineering, scaffolds” in English. RESULTS AND CONCLUSION: To date, there are four ideal kinds of calcium phosphate materials including hydroxyapatite, tricalcium phosphate, amorphous calcium phosphate and hydroxyapatite/tricalcium phosphate biphasic ceramic material. Hydroxyapatite has better strength and cel adsorption capacity, but has poor biodegradation. Tricalcium phosphate has good abilities of osteogenesis and degradation, but its degradation rate is hard to match the new bone formation,and its strength is also relatively poor. Amorphous calcium phosphate has neither strength nor solubility. In contrast, biphasic calcium phosphate ceramics has moderate degradation rate between hydroxyapatite and tricalcium phosphate, and therefore, it either can be replaced by autologous bone after degradation or exhibits proper strength. While how to further improve the physical properties and promote osteogenesis stil need much deeper research.