Abrasive wear of ceramic, metal, and UHMWPE bearing surfaces from third-body bone, PMMA bone cement, and titanium debris.

摘要: The debris generated by the progressive wear of total joint replacement (TJR) devices is considered a primary cause osteolysis, bone resorption, and premature failure artificial hips knees. vast majority this originates from UHMWPE articulating surfaces caused tribological interaction with opposing metal or ceramic surface hard particulates contained in sinovial fluid. Entrapment third body debris, such as cortical bone, PMMA cement, titanium between can abrasion both bearing UHMWPE. propensity for abrasive dependent on relationship hardness third-body surfaces. To gain better understanding its effect wear, behavior several was characterized terms substrate. effects increased roughness also determined. In addition, amount quantified (particles/ml) fretting-type solution. results investigation showed resistance to increase increasing hardness. Bone produced visible all including nitrogen ion implanted Ti-6Al-4V. no evidence least wear. sliding against Co-Cr-Mo found levels 1.48 microns added test rate rapidly concentrations solution exceeding about 10(5) particles/ml. These suggest that particles, large small, are capable causing UHMWPE, will occur if exceeds surface.