Bearing surfaces : Highly cross-linked polyethylene (XLPE) Ceramic-on-ceramic (COC) Metal-on-metal (MOM) Adaptive immune response appear to be more frequent and of greater magnitude in failed metal-on-metal implants CoC bearings had better survival than did MoM bearings at the ten-year follow-up For older, less active patients, traditional metal-on-polyethylene bearings are the appropriate choice MOM causes metallosis and local tissue pseudotumor formation…
