Lewinnek G E, Lewis J L, Tarr R, Compere C L, Zimmerman J R
J Bone Joint Surg Am. 1978 Mar;60(2):217-20.
In a series of 300 total hip replacements, nine (3 per cent) dislocated. Precise measurements of the orientation of the acetabular cup were made and it was found that anterior dislocations were associated with increased acetabular-component anteversion. There was no significant correlation between cup-orientation angle and posterior dislocation. The dislocation rate for cup orientation with anteversion of 15 +/- 10 degrees and lateral opening of 40 +/- 10 degrees was 1.5 per cent, while outside this "safe" range the dislocation rate was 6.1 per cent. Other factors that were documented include time after surgery (with the greatest risk in the first thirty days) and surgical history (with a greater risk in hips that have had prior surgery).
在总共300例全髋关节置换手术中，有9例（3%）发生了脱位。对髋臼杯的方向进行了精确测量，发现前脱位与髋臼组件前倾角增加有关。杯方向角与后脱位之间没有显著相关性。髋臼杯前倾角为15±10度且外侧开口为40±10度时的脱位率为1.5%，而超出这个“安全”范围时脱位率为6.1%。记录的其他因素包括术后时间（术后头30天风险最大）和手术史（既往有手术史的髋关节风险更大）。
