In addition to the immediate fixation and stability of the implant, the mid- and long-term stability may be compromised. These etiologies may result in antero-lateral and/or superior bone deficiency which may compromise acetabular component stability and impair reliable fixation. This can be the sequela of developmental dysplasia of the hip, osteonecrosis, or septic arthritis, among others ( 1, 2). Accepted for publication Sep 06, 2018.Ī large number of young patients who develop hip arthritis possess a severe biomechanical abnormality of the joint. Keywords: Total hip arthroplasty offset head center acetabular shell center of rotation (COR) We have demonstrated how this offset COR acetabular shell may help bring down the COR of the hip in these quite challenging cases utilizing conventional techniques. In this case series, we demonstrate the use of this shell in patients with difficult hip pathologies. Previous radiographic studies have demonstrated the efficacy of this shell in lowering hip COR. Recently, a new acetabular shell was developed with a goal of maintaining the native hip COR while achieving good fixation with standard instrumentation and technique. Large acetabular shells have often been used to achieve adequate fixation in scenarios of severe bone loss, however, these techniques have been shown to elevate the center of rotation (COR) of the hip and alter hip biomechanics. This may compromise the ability to gain acetabular component stability and impair reliable fixation. Policy of Dealing with Allegations of Research MisconductĪbstract: Several conditions may predispose patients to development of antero-lateral acetabular bone deficiency, including developmental dysplasia of the hip, osteonecrosis, or septic arthritis, among others. Policy of Screening for Plagiarism Process.
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