Noninvasive three-dimensional assessment of femoroacetabular impingement

Tannast, Moritz; Kubiak-Langer, Monika; Langlotz, Frank; Puls, Marc; Murphy, Stephen B; Siebenrock, Klaus A (2007). Noninvasive three-dimensional assessment of femoroacetabular impingement. Journal of orthopaedic research, 25(1), pp. 122-31. Hoboken, N.J.: Wiley 10.1002/jor.20309

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A CT-based method ("HipMotion") for the noninvasive three-dimensional assessment of femoroacetabular impingement (FAI) was developed, validated, and applied in a clinical pilot study. The method allows for the anatomically based calculation of hip range of motion (ROM), the exact location of the impingement zone, and the simulation of quantified surgical maneuvers for FAI. The accuracy of HipMotion was 0.7 +/- 3.1 degrees in a plastic bone setup and -5.0 +/- 5.6 degrees in a cadaver setup. Reliability and reproducibility were excellent [intraclass correlation coefficient (ICC) > 0.87] for all measures except external rotation (ICC = 0.48). The normal ROM was determined from a cohort of 150 patients and was compared to 31 consecutive hips with FAI. Patients with FAI had a significantly decreased flexion, internal rotation, and abduction in comparison to normal hips (p < 0.001). Normal hip flexion and internal rotation are generally overestimated in a number of orthopedic textbooks. HipMotion is a useful tool for further assessment of impinging hips and for appropriate planning of the necessary amount of surgical intervention, which represents the basis for future computer-assisted treatment of FAI with less invasive surgical approaches, such as hip arthroscopy.

Item Type:

Journal Article (Original Article)


04 Faculty of Medicine > Department of Orthopaedic, Plastic and Hand Surgery (DOPH) > Clinic of Orthopaedic Surgery
04 Faculty of Medicine > Pre-clinic Human Medicine > Institute for Surgical Technology & Biomechanics ISTB [discontinued]

UniBE Contributor:

Tannast, Moritz; Kubiak-Langer, Monika; Langlotz, Frank; Puls, Marc and Siebenrock, Klaus-Arno










Factscience Import

Date Deposited:

04 Oct 2013 14:57

Last Modified:

04 May 2014 23:17

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URI: (FactScience: 50712)

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