Dennis Douglas A
Department of Biomedical Engineering, University of Tennessee, Knoxville, TN, USA.
Orthopedics. 2006 Sep;29(9 Suppl):S13-6.
The success of total knee arthroplasty (TKA) over the past two decades of use has resulted in the implantation of TKA into younger patients who have increased functional requirements and demand increased implant longevity. Improved functional performance requires enhanced range of motion, increased motor performance, and creation of kinematic patterns that more closely resemble the normal knee. Increased longevity necessitates more durable implant fixation, improvements in bearing materials, and lower polyethylene stresses. Considerations to reduce polyethylene wear include increased cross-linking, improved femoral component surface finish, better modular tibial locking mechanisms, and the use of mobile-bearing TKA designs that allow increased implant conformity and reduced contact stresses without increasing loads transmitted to the fixation interface.
在过去二十年的应用中，全膝关节置换术（TKA）取得的成功促使其被应用于功能需求更高、对植入物使用寿命要求更长的年轻患者。功能表现的改善需要扩大活动范围、提高运动性能以及创造更接近正常膝关节的运动模式。更长的使用寿命需要更持久的植入物固定、改进轴承材料以及降低聚乙烯应力。减少聚乙烯磨损的考虑因素包括增加交联、改善股骨部件表面光洁度、优化模块化胫骨锁定机制以及采用活动平台TKA设计，这种设计可提高植入物的贴合度并降低接触应力，同时不会增加传递至固定界面的负荷。
