Effects of Gamma Irradiation and Accelerated Aging on Wear Properties of UHMWPE Artificial Joint
نویسندگان
چکیده
Oxidative degradation of ultra-high molecular weight polyethylene (UHMWPE; PE), due to gamma irradiation sterilization in air, increases wear rate in artificial joint. Not only adhesive and abrasive wear but also delamination (flaking), a typical wear of the PE component in artificial knee joint, and fracture could be observed. This paper deals with gamma-irradiation effects on severe wear mechanism of PE components. Scanning electron microscope (SEM) observation provided that the freeze-fractured surface of the both of components had a double-layer structure, bordered below 300-700 μm depth from the surface, and at closer observation of subsurface layer below the border, we could find an extremely rough and porous structure. Fourier Transform Infrared (FT-IR) analysis presented that the rough region had the highest extent of oxidation. Wear test result by pin-on-disc machine also demonstrated that this rough region provided the maximum wear volume.
منابع مشابه
Quantitative comparison of wear debris from UHMWPE that has and has not been sterilised by gamma irradiation.
Ultra-high-molecular-weight polyethylene (UHMWPE) components for total joint replacement generate wear particles which cause adverse biological tissue reactions leading to osteolysis and loosening. Sterilisation of UHMWPE components by gamma irradiation in air causes chain scissions which initiate a long-term oxidative process that degrades the chemical and mechanical properties of the polyethy...
متن کاملMacrophage Response to UHMWPE Submitted to Accelerated Ageing in Hydrogen Peroxide
Ultra-high molecular weight polyethylene (UHMWPE) has been the most commonly used bearing material in total joint arthroplasty. Wear and oxidation fatigue resistance of UHMWPE are regarded as two important properties to extend the longevity of knee prostheses. The present study investigated the accelerated ageing of UHMWPE in hydrogen peroxide highly oxidative chemical environment. The sliced s...
متن کاملWear of retrieved UHMWPE hip liners.
After the gamma-irradiation sterilization, the most widely used orthopaedic grade polymer bearing liner material for the total joint replacement, ultra-high molecular weight polyethylene (UHMWPE), degrades through the progressive in vivo oxidation. The oxidative degradation makes UHMWPE brittle and leads to reduction of its mechanical properties. In this study, the effect of the in vivo post-ir...
متن کاملMechanical Properties and Tribological Behaviour of Retrieved UHMWPE Tibial Insert in Total Knee Replacement after Implantation 30 Months
Ultra high molecular weight polyethylene (UHMWPE) has been used as a load bearing and articulating counter face in total knee replacement (TKR) for over forty years1. However, wear debris generation of UHMWPE materials after their implantation in the human body has been proven to induce osteolysis and aseptic loosening, which is the main cause of long-term failure of TKR composed of UHMWPE and ...
متن کاملAnti-oxidation Treatment of Ultra High Molecular Weight Polyethylene Components to Decrease Periprosthetic Osteolysis: Evaluation of Osteolytic and Osteogenic Properties of Wear Debris Particles in a Murine Calvaria Model
Wear debris-induced osteolysis remains the greatest limitation of long-term success for total joint replacements with ultra-high molecular weight polyethylene (UHMWPE) bearings. To address oxidative degradation post-gamma irradiation, manufacturers are investigating the incorporation of antioxidants into PE resins. Similarly, larger molecular weight monomers have been developed to increase cros...
متن کامل