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The Journal of Arthroplasty, ISSN: 0883-5403, Vol: 24, Issue: 2, Page: 323.e13-323.e16
Hip
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Impingement as a Mechanism of Dissociation of a Metasul Metal-on-Metal Liner
Malik, Aamer; Dorr, Lawrence D; Long, William THip
This case report is of a patient with disassociation of the acetabular cup liner caused by impingement. The cup inclination (39°) and anteversion (24°) were good as measured by computer navigation. Impingement occurred because the head-neck ratio was 2.0, and the hip length and offset were short by one head length. Successful revision without intraoperative impingement was accomplished with one size head larger (32 mm; head-neck ratio, 2.3) and one size longer to correct hip length and offset.
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