Gamma-Radiation Effect on Morphology and Properties of TTCP/DCPA-Derived Calcium Phosphate Cement

The purpose of the present study is to investigate the -ray effect on the structure and some critical properties, such as working/setting time and compressive strength, of a TTCP/DCPA-based CPC. Experimental results indicate that working/setting time, compressive strength, TTCPHA conversion rate and morphology of the present CPC are all related to the dosage of -ray sterilization. The best -ray dosage appears to be 30 kGy which leads to slightly longer setting/working time, the highest TTCP-HA conversion rate and the highest compressive strength. With increasing -ray dosage, the morphology of CPC changed from sharp-edged petal-like morphology (non-sterilized and 10 kGy) to globular-like morphology (20 and 30 kGy) to dull-edged coralline-like morphology (40 and 80 kGy).