羟磷灰石表面涂层假体能缓和界面层的应力差异。
The hydroxyapatite-coated prosthesis helped to reduce stress difference at bone and prosthesis interface.
结果：在关节置换组，仅使用当代的双极假体，采用羟基磷灰石涂层现代柄非骨水泥假体占20.8%(522人)。
Results in the arthroplasty group, only contemporary bipolar prostheses were used and uncemented prostheses with modern stems and hydroxyapatite coating accounted for 20.8% (522) of the implants.
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