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The Journal of Arthroplasty, ISSN: 0883-5403, Vol: 26, Issue: 4, Page: 666.e5-666.e8
Hip
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Fracture of a Cross-Linked Polyethylene Liner: A Multifactorial Issue
Blumenfeld, Thomas J; McKellop, Harry A; Schmalzried, Thomas P; Billi, FabrizioHip
A limited number of reports have detailed the cause of fracture of a highly cross-linked polyethylene liner. Typically, the fractures have occurred in a region of thin and/or unsupported polyethylene, in association with superiorly directed edge loading conditions secondary to an excessively inclinated acetabular component. This case report details an unusual fracture mechanism of a 5-mrad cross-linked liner caused by horizontal loading conditions. The report details several factors that were felt to be etiologic including the specific liner locking mechanism. The treatment options are discussed.
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