来自《耶鲁大学开放课程：生物医学工程探索 第25集 第25集》

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  this part of the hip that contains the joint, the ball,
  不仅更换包括关节和股骨头的部分
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  but also to replace the socket as well.
  同时也要更换髋臼
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  So, you create a total hip replacement
  这样一来就是全髋置换
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  where you've got a material that you put into the socket,
  用人工材料替换球窝
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  and a material that you
  同时也用人工材料
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  put onto the femur to fit into that socket.
  装在股骨头上来和球窝契合
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  I showed you this picture before and this was a-
  这张图我给你们看过
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  -this is a design of a material like this,
  就是这类的材料的设计
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  you see a metal cup that serves as the new acetabulum.
  你可以看到一个金属杯状结构作为新髋臼
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  You see a metal ball that is attached to the femur,
  这个金属球装在股骨上
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  and this ball fits into this socket.
  两者相互契合
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  Now, if you just had metal on metal
  那么 如果是金属间直接接触