| Literature DB >> 19100926 |
Gavan P Duffy1, Keith K Wannomae, Shannon L Rowell, Orhun K Muratoglu.
Abstract
We report a case of fracture at 2 years after implantation of a 50-kGy moderately cross-linked ultrahigh molecular weight polyethylene liner with an extended lip (Marathon, DePuy, Warsaw, IN). The extended lip section had fractured. The liner showed no oxidation. The articular surface was grossly deformed, likely due to wear, creep, and/or plastic deformation, and the liner showed no recovery of machining marks upon melting, indicating that some wear had occurred. Electron microscopy revealed fatigue striations on the fracture surface. The likely cause of failure was femoral neck impingement-induced wear and fatigue on the liner.Entities:
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Year: 2009 PMID: 19100926 DOI: 10.1016/j.arth.2007.12.020
Source DB: PubMed Journal: J Arthroplasty ISSN: 0883-5403 Impact factor: 4.757