Range of motion in anterior femoroacetabular impingement

Kubiak-Langer, M; Tannast, Moritz; Murphy, S B; Siebenrock, K A; Langlotz, F (2007). Range of motion in anterior femoroacetabular impingement. Clinical orthopaedics and related research, 458, pp. 117-124. Heidelberg: Springer 10.1097/BLO.0b013e318031c595

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The range of motion of normal hips and hips with femoroacetabular impingement relative to some specific anatomic reference landmarks is unknown. We therefore described: (1) the range of motion pattern relative to landmarks; (2) the location of the impingement zones in normal and impinging hips; and (3) the influence of surgical débridement on the range of motion. We used a previously developed and validated noninvasive 3-D CT-based method for kinematic hip analysis to compare the range of motion pattern, the location of impingement, and the effect of virtual surgical reconstruction in 28 hips with anterior femoroacetabular impingement and a control group of 33 normal hips. Hips with femoroacetabular impingement had decreased flexion, internal rotation, and abduction. Internal rotation decreased with increasing flexion and adduction. The calculated impingement zones were localized in the anterosuperior quadrant of the acetabulum and were similar in the two groups and in impingement subgroups. The average improvement of internal rotation was 5.4 degrees for pincer hips, 8.5 degrees for cam hips, and 15.7 degrees for mixed impingement. This method helps the surgeon quantify the severity of impingement and choose the appropriate treatment option; it provides a basis for future image-guided surgical reconstruction in femoroacetabular impingement with less invasive techniques.

Item Type:

Journal Article (Original Article)


04 Faculty of Medicine > Department of Orthopaedic, Plastic and Hand Surgery (DOPH) > Clinic of Orthopaedic Surgery

UniBE Contributor:

Tannast, Moritz and Siebenrock, Klaus-Arno










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Date Deposited:

04 Oct 2013 14:57

Last Modified:

08 Jun 2016 10:43

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PubMed ID:


Web of Science ID:



https://boris.unibe.ch/id/eprint/24448 (FactScience: 50710)

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