Abstract: Oxidation-treated carbon fiber was used to reinforce calcium phosphate bone cement (α-TCP/TTCP).
The effect of length-diameter ratio and content of carbon fiber on the compression strength and bending strength of the hardened body was
preliminarily discussed. The results show that the reinforcing effect is optimal when the length-diameter ratio of carbon fiber is 375 and
the addition quantity is 0.3wt%. The compression strength increases to 155% (maximum: 63.46MPa), bending strength increases to 200% (maximum:
11.95MPa), respectively. However, if the addition quantity is too large or the length-diameter ratio is too high, carbon fiber can
not give play to its function fully, because it can not be dispersed uniformly in the hardened body. The biological evaluation indicates that the carbon
fiber reinforced α-TCP/TTCP has good biocompatibility.

Key words: calcium phosphate bone cement, carbon fiber, reinforcing, biocompatibility