Thus, for a given acetabular shell size, a large head diameter can be used (fi gure 6), which provides enhanced joint stability and a large range of movement before the neck impinges on the socket.

• 因此，同样的髋臼型号，金属假体可以使用更大的股骨头匹配，这既增强了关节的稳定性，也减少了股骨颈-髋臼缘的撞击而允许更大的活动范围。