Department of Orthopedic Surgery, University of Bern, Inselspital, CH 3010 Bern, Switzerland.
Clin Orthop Relat Res. 2011 Nov;469(11):3229-40. doi: 10.1007/s11999-011-1945-4. Epub 2011 Jul 15.
The prevalence of a cam-type deformity in athletes and its association with vigorous sports activities during and after the growth period is unknown.
QUESTIONS/PURPOSES: We therefore compared the prevalence and occurrence of a cam-type deformity by MRI in athletes during childhood and adolescence with an age-matched control group.
We retrospectively reviewed 72 hips in 37 male basketball players with a mean age of 17.6 years (range, 9-25 years) and 76 asymptomatic hips of 38 age-matched volunteers who had not participated in sporting activities at a high level.
Eleven (15%) of the 72 hips in the athletes were painful and had positive anterior impingement tests on physical examination. Internal rotation of the hip averaged 30.1° (range, 15°-45°) in the control group compared with only 18.9° (range, 0°-45°) in the athletes. The maximum value of the alpha angle throughout the anterosuperior head segment was larger in the athletes (average, 60.5° ± 9°), compared with the control group (47.4° ± 4°). These differences became more pronounced after closure of the capital growth plate. Overall, the athletes had a 10-fold increased likelihood of having an alpha angle greater than 55° at least at one measurement position.
Our observations suggest a high intensity of sports activity during adolescence is associated with a substantial increase in the risk of cam-type impingement. These patients also may be at increased risk of subsequent development of secondary coxarthrosis.
Level II, diagnostic study. See the Guidelines for Authors for a complete description of levels of evidence.
在运动员中，凸轮型畸形的流行率及其与生长期间和之后剧烈运动活动的关系尚不清楚。
问题/目的：因此，我们比较了儿童和青少年期运动员与年龄匹配的对照组之间通过 MRI 检测凸轮型畸形的患病率和发生情况。
我们回顾性分析了 37 名男性篮球运动员的 72 髋（平均年龄 17.6 岁，范围 9-25 岁）和 38 名年龄匹配的未参加高水平运动的无症状志愿者的 76 髋。
运动员中有 11 髋（15%）疼痛，体格检查时前撞击试验阳性。对照组髋关节内旋平均为 30.1°（范围 15°-45°），而运动员组仅为 18.9°（范围 0°-45°）。在前上头部段整个范围内，α角的最大值在运动员中更大（平均 60.5°±9°），而在对照组中为 47.4°±4°。这些差异在骺板闭合后更为明显。总体而言，运动员在至少一个测量位置上，α角大于 55°的可能性增加了 10 倍。
我们的观察结果表明，青少年时期高强度的运动活动与凸轮型撞击的风险显著增加有关。这些患者也可能有继发髋关节骨关节炎的风险增加。
Ⅱ级，诊断研究。有关证据水平的完整描述，请参阅作者指南。
