J Arthroplasty. 2003 Aug;18(5):553-61.

Third-body wear of highly cross-linked polyethylene in a hip simulator.

Bragdon CR, Jasty M, Muratoglu OK, O'Connor DO, Harris WH.

Source

Department of Orthopaedic Surgery of Massachusetts General Hospital, Boston, MA 02114, USA.

Abstract

The wear performance of a radiation cross-linked melted ultrahigh-molecular-weight polyethylene (UHMWPE) articulating against 28-mm cobalt chrome femoral heads in the presence of third-body particulate debris was investigated in a hip simulator and compared with the wear of conventional UHMWPE. Particles of aluminum oxide or bone cement containing barium sulfate were added to the serum. In the presence of aluminum oxide particles, the incremental wear rates of conventional UHMWPE averaged as high as 149 +/- 116 mg/million cycles compared with 37 +/- 38 mg/million cycles for the highly cross-linked components. The difference in the average weight loss was statistically significant at P <.01. With bone cement particles, the conventional UHMWPE components had an average incremental wear rate of 19 +/- 5mg/million cycles, and the wear rate of the highly cross-linked UHMWPE components was 0.5 +/- 0.7 mg/million cycles.

PMID:: 12934205; [PubMed - indexed for MEDLINE]

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