Tetragonal zirconia polycrystal was used to toughen hydroxyapatite in this study.K IC index of bioactive composite was raised.

• 本研究采用四方氧化锆多晶增韧羟基磷灰石生物活性陶瓷，在不降低材料生物活性基础上，提高材料断裂韧性指标。