Abolfazl Bagherifard1, Mahmoud Jabalameli1, Hooman Yahyazadeh2, Azadeh Shafieesabet1, Kaveh Gharanizadeh1, Ali Jahansouz1, Parhan Khanlari3. 1. 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. 2. 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. yahyazadehhooman@yahoo.com. 3. Medical Department of Iran Football Federation, FFIRI, Tehran, Iran.
Abstract
PURPOSE: 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. METHODS: 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. RESULTS: 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). CONCLUSIONS: 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. LEVEL OF EVIDENCE: III.
PURPOSE: 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. METHODS: 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. RESULTS: 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). CONCLUSIONS: 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. LEVEL OF EVIDENCE: III.
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