Abstract
The purpose of this study was to determine the prevalence of crack formation in conventional ultra-high-molecular-weight polyethylene cups and its association with rim impingement, oxidation, and time in situ. One hundred twenty acetabular cups were retrieved during revision total hip arthroplasty. In 40% (48/120) of the retrieved specimens, multiple subsurface cracks of several millimeters in length were revealed by transillumination. In 5 specimens, full thickness cracks led to fragmentation of the liner before revision. Thirty-eight (32%) liners had regions of moderate to severe impingement damage to the rim; cracks were initiated at the site of impingement in all but 1 liner (P < .0001). Cracks commonly occur in conventional ultra-high-molecular-weight polyethylene liners, often after neck impingement and almost always in association with oxidation of the polymer.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 87-92 |
| Number of pages | 6 |
| Journal | Journal of Arthroplasty |
| Volume | 20 |
| Issue number | SUPPL. 3 |
| DOIs | |
| State | Published - Oct 2005 |
Keywords
- Cross-linked polyethylene
- Hip arthroplasty
- Impingement
- Oxidation
- Retrieval
- Wear
ASJC Scopus subject areas
- Orthopedics and Sports Medicine
- Surgery
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