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[Transforming the sintered ostrich cancellous bone to multiphasic calcium phosphate ceramic]
Yao-wu Yang1, Tian-qiu Mao, Mo-yi Sun
1Department of Oral and Maxillofacial Surgery, Stomatological College, Fourth Military Medical University, Xi'an 710032, China. yangyaowu_1@sina.com.cn
Objective:
To transform the sintered ostrich cancellous bone(ostrich true bone ceramic, OTBC) to multiphasic calcium phosphate ceramic and study its components and characterization.
Methods:
The OTBC blocks were soaked in different concentration of sodium pyrophosphate (Na(4)P(2)O(7).H(2)O,NP) solution and heated to 1100 degrees C to transform its constitution from HAP into multiphasic calcium phosphate ceramics. Then the surface configuration of the material was observed by SEM and the following properties of the material:porosity,bending strength,mineral composition and element ratio were analyzed.
Results:
The prepared material was a kind of porous calcium phosphate ceramic composed of beta-TCP, HAP and NaCaPO(4). With increase of the NP concentration,the content of HAP decreased while beta-TCP and NaCaPO(4) increased. The average bending strength of the material was (1.95+/-0.46)Mpa,the Ca/P element ratio was 1.511 and the average porosity was(60.71+/-6.9)%. The pore size was uneven.
Conclusion:
The OTBC could be transformed into beta-TCP /HAP /NaCaPO(4) multiphasic calcium phosphate ceramic by heating with NP. With characteristic porous structure, the prepared OTBC could become a new type of bone graft.