Fracture of a cross-linked polyethylene liner due to impingement.
case_report · Level V
Where this comes from
- Record sourced from PubMed, PMID 19100926.
- Also identified by DOI 10.1016/j.arth.2007.12.020.
- No licence information is recorded for this record.
- Because redistribution is not established, this page shows the abstract only. Follow the links below for the full text.
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.
Medical subject headings
- Arthroplasty, Replacement, Hip
- Femur Neck
- Hip Prosthesis
- Polyethylene
- Prosthesis Failure
Anatomy
- hip
- femur