Next-generation soft-tissue-friendly large-diameter femoral head

Abstract Large-diameter femoral heads are being used increasingly in total hip arthroplasty (THA) to minimize hip dislocation risk. However, recent studies have shown that conventional large heads can impinge on native soft tissues, particularly the iliopsoas, leading to activity-limiting anterior h...

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Bibliographic Details
Published in:Seminars in arthroplasty 2013-12, Vol.24 (4), p.211-217
Main Authors: Varadarajan, Kartik Mangudi, PhD, Duffy, Michael P., MS, Zumbrunn, Thomas, MS, Chan, David, BS, Wannomae, Keith, BS, Micheli, Brad, BS, Freiberg, Andrew A., MD, Rubash, Harry E., MD, Malchau, Henrik, MD, PhD, Muratoglu, Orhun K., PhD
Format: Article
Language:English
Subjects:
anterior hip pain
iliopsoas impingement
large-diameter head
Orthopedics
total hip arthroplasty
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Summary:Abstract Large-diameter femoral heads are being used increasingly in total hip arthroplasty (THA) to minimize hip dislocation risk. However, recent studies have shown that conventional large heads can impinge on native soft tissues, particularly the iliopsoas, leading to activity-limiting anterior hip pain. To address this, a novel soft-tissue-friendly anatomically contoured femoral head (ACH) was developed. This paper describes the design rationale and pre-clinical testing of the ACH implant. The test results demonstrate that anatomical contouring of large-diameter femoral heads for soft-tissue relief can be accomplished without affecting dislocation resistance, femoroacetabular contact area, or wear performance in ceramic-on-polyethylene implants.
ISSN:1045-4527
1558-4437
DOI:10.1053/j.sart.2014.01.007