Tissue reactions to wear products from polyacetal (Delrin®) and UHMW polyethylene in total hip replacement

✍ Scribed by Mathiesen, E. B. ;Lindgren, J. U. ;Reinholt, F. P. ;Sudmann, E.

• Publisher: John Wiley and Sons
• Year: 1987
• Tongue: English
• Weight: 788 KB
• Volume: 21
• Category: Article
• ISSN: 0021-9304
• DOI: 10.1002/jbm.820210406

✦ Synopsis

The tissue reaction to implanted materials and their wear products is important for the long-term fixation of a total hip replacement (THR). Recent reports indicate a relatively high incidence of aseptic loosening with Christiansen total hip prostheses. We examined tissue reactions to wear products in two groups of prostheses: 16 Christiansen prostheses with polyacetal (Delrin) sockets, and 18 Charnley-Müller total hip prostheses with ultrahigh-molecular-weight polyethylene (UHMWP) sockets. Specimens from these 34 patients were compared in a combined qualitative and semiquantitative morphological study. We saw similar histological changes in specimens of both groups, but specimens from the bone-cement interfaces of the acetabulum and femur shaft in the polyacetal group showed more inflammation and necrosis.