The severity of degenerative changes of the hip is known to adversely impact the outcomes of the treatment of femoroacetabular impingement (FAI). Although the operative indications for FAI have expanded to include patients with moderate degrees of hip osteoarthritis, the exact stage of hip osteoarthritis at which surgery for FAI can offer clinical benefits is still uncertain.

中文翻译：

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Tönnis 2 级或以上骨关节炎患者的小开放股骨髋臼截骨术与随后转为 THA 的较高风险相关。

众所周知，髋关节退行性改变的严重程度会对股骨髋臼撞击症（FAI）的治疗结果产生不利影响。尽管 FAI 的手术适应症已扩大到包括中度髋部骨关节炎患者，但 FAI 手术可以在髋部骨关节炎的确切阶段提供临床益处仍不确定。