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Review
. 2018 Sep 6;15(4):992-996.
doi: 10.1016/j.jor.2018.08.040. eCollection 2018 Dec.

Restoration of center of rotation and balance of THR

Zachary C Lum  1 , Lawrence D Dorr  2
Affiliations
Review

Restoration of center of rotation and balance of THR

Zachary C Lum et al. J Orthop. .

Abstract

Improvements in early hip arthroplasties focused on surgical techniques with subsequent studies emphasizing restoration of the hip center of rotation for longevity of the implant. Current literature suggests femoral stem anteversion of 10-20°, cup anteversion of 20-25° and a combined anteversion of 25-40° in males, 30-45° in females. Inclination goal appears to be 45° precisely to balance between impingement & dislocation versus edge loading & accelerated wear. Restoration of the acetabular center of rotation will improve joint reactive forces and reduce wear. Here we describe techniques to achieve a well balanced total hip with restoration of the center of rotation.

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Figures

Fig. 1
Fig. 1
Ranawat Triangle for locating the center of rotation of the acetabulum.
Fig. 2
Fig. 2
The French method by Fessy et al. locating the center of rotation of the hip.
See this image and copyright information in PMC

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