RESULTS: Sixty patients with lateral impingement (65.0% female, age: 35.3 ± 13.0 years) were matched to 180 patients without lateral impingement (65.0% female, age: 34.7 ± 12.5 years, P ≥ .279). Patients with lateral impingement had larger preoperative AAs on both Dunn (71.0° ± 8.8° vs 67.6° ± 6.1°, P = .001) and AP radiographs (79.0° ± 12.1° vs 48.2° ± 6.5°, P < .001). However, there were no differences in postoperative AAs on either view (Dunn: 39.0° ± 6.1° vs 40.5° ± 5.3°, AP: 45.8° ± 9.0° vs 44.9° ± 7.0°, P ≥ .074). Labral tears began more superiorly in patients with lateral impingement (12:00 ± 0:49 vs 12:17 ± 0:41, P = .030), and they demonstrated greater rates of acetabular and femoral cartilage damage (P = .030 for both); however, there were no differences in PROs or reoperation rates between the groups at 5-year follow-up.
CONCLUSIONS: Although cam deformities located laterally and anterolaterally are larger than those located anterolaterally alone, both can be resected adequately, resulting in similar postoperative radiographic measurements, PROs, and survivorship.
METHODS: Level III, retrospective cohort study.
结果:60例外侧撞击患者(65.0%为女性,年龄:35.3±13.0岁)与180例无侧撞击患者(65.0%为女性,年龄:34.7±12.5岁,p≥0.279)。侧方撞击患者术前AAs均较大(71.0°±8.8°vs.67.6°±6.1°,p=0.001)和AP射线照片(79.0°±12.1°vs.48.2°±6.5°,p<0.001)。然而,两种观点的术后AAs均无差异(Dunn:39.0°±6.1°vs.40.5°±5.3°,AP:45.8°±9.0°vs.44.9°±7.0°,p≥0.074)。外侧撞击患者的唇膜撕裂开始更为优越(12:00±0:49vs.12:17±0:41,p=0.030),并且它们显示出更高的髋臼和股骨软骨损伤率(两者p=0.030);然而,5年随访时,两组间的PRO或再手术率无差异.
结论:尽管位于侧方和前侧方的凸轮畸形大于仅位于前侧方的凸轮畸形,两者都可以充分切除,导致类似的术后射线照相测量,PROs,和生存。