Bone and Joint Reconstruction Research Center, Shafa Yahyaeian Orthopedic Hospital, Iran University of Medical Sciences, Mojahedin Islam Avenue, Shohada Square, Tehran, 1157637131, Islamic Republic of Iran.
Medical Department of Iran Football Federation, FFIRI, Tehran, Iran.
Knee Surg Sports Traumatol Arthrosc. 2018 Feb;26(2):368-373. doi: 10.1007/s00167-017-4589-4. Epub 2017 Jun 5.
Femoroacetabular impingement may be associated with anterior cruciate ligament (ACL) injuries. The purpose of this study was to determine the head-neck offset, as measured by 45° Dunn's view alpha angles, in patients with ACL injuries compared to control subjects.
In this retrospective study, 140 consecutive non-professional athletes with primary ACL ruptures confirmed with knee arthroscopy and 100 consecutive patients with non-ACL injury were enrolled. Hip range of motion was assessed in lower extremities in all participants, and alpha angle was calculated according to 45° Dunn's view radiographs.
There is not any difference in age, gender distribution, height, weight, and BMI between groups. Internal rotation, abduction, and adduction of the hip were significantly decreased in ACL-injured patients comparing with control subjects (p < 0.001). ACL-injured patients had also a significantly higher alpha angle comparing to the control individuals (p < 0.001). The mean of alpha angle in the ACL-injured patients was 56.1 (SD 10.1) and in the non-ACL-injured group was 49.3 (SD 9.4).
The patients in ACL-injured group showed a significant restriction in hip range of motion and also a diminished femoral head-neck offset suggesting a possible role of these findings in the outcome assessed.
III.
股骨髋臼撞击症可能与前交叉韧带（ACL）损伤有关。本研究的目的是确定 ACL 损伤患者与对照组相比，通过 45°Dunn 视图α角测量的头-颈偏移。
在这项回顾性研究中，纳入了 140 例经膝关节镜证实的原发性 ACL 断裂的非职业运动员和 100 例非 ACL 损伤患者。所有参与者的下肢髋关节活动度均进行了评估，并根据 45°Dunn 视图 X 线片计算α角。
两组间在年龄、性别分布、身高、体重和 BMI 方面无差异。与对照组相比，ACL 损伤患者的髋关节内旋、外展和内收明显减少（p<0.001）。与对照组相比，ACL 损伤患者的α角也明显更高（p<0.001）。ACL 损伤患者的平均α角为 56.1（SD 10.1），非 ACL 损伤组为 49.3（SD 9.4）。
ACL 损伤组患者的髋关节活动度明显受限，股骨头-颈偏移也减小，这可能表明这些发现与评估结果有关。
III 级。
