alexa Relationship of femoral head and acetabular size to the prevalence of dislocation.
Orthopaedics

Orthopaedics

Journal of Arthritis

Author(s): Kelley SS, Lachiewicz PF, Hickman JM, Paterno SM

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Abstract Two clinical studies, one prospective randomized and one retrospective, were performed to evaluate the relationship of femoral head size and acetabular component outer diameter to the prevalence of dislocation of the modular total hip replacement. Between October 1995 and April 1996, 31 primary total hip arthroplasties in 30 patients were randomized to a femoral head diameter of 22 mm or 28 mm, for two groups of acetabular components of outer diameters of 56 mm or larger and 54 mm or smaller. Head size (22 mm) and acetabular component outer diameter (> or = 56 mm) were found to increase the risk of dislocation. From December 1984 to January 1994, 308 primary total hip arthroplasties were performed through a posterior approach by one surgeon using a modular 28 mm femoral head and one type of uncemented acetabular component. The rate of dislocation for acetabular components with an outer diameter of 62 mm or larger was increased significantly (five of 36 hips, 14\%) compared with those with an outer diameter of 60 mm or smaller (11 of 272 hips, 4\%).
This article was published in Clin Orthop Relat Res and referenced in Journal of Arthritis

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