Co-Cr Head Roughness and its Effect on Wear of UHMWPE and XLPE Cups

摘要: Crosslinked polyethylene appears to be a better hip bearing material than conventional polyethylene, but will it take us past the expected 20-year survival and into anticipated need for 30-year survivors? Knowing that sizeable percentage of Co-Cr femoral heads roughen in patient, XLPE is sensitive roughening, there are many doubts over long-term clinical use with cups. Wear studies at LLUMC suggest likely cost using larger head sizes young active patients, i.e. those requiring increase stability reduce dislocation. Therefore, we believe these higher activity patients extended expectations benefit from alternative surfaces such as ceramic on ceramic. In addition, four modes wear generation, impingement, backside etc., however, still know very little about processes XLPE, especially understanding changes particle concentrations.