Prevention of the total hip arthroplasty loosening polyethylene liner coated with MPC polymer

点击翻译按钮获取中文摘要

Periprosthetic bone resorption is a serious problem associated with aseptic loosening of total hip prosthesis. A foreign body reaction of synovial tissues and macrophages to wear debris released into the joint space by friction between the polyethylene component and the metal head has been suggested as a common pathological finding in patients with loosening of their prosthesis.The purpose of this study is prevention of the loosening of the total hip prosthesis, by using polyethylene component coated with 2-methacryloxyethyl phosporylcholine (MPC) polymer. We acquired the knowledge shown in the following through this study.1. Friction and the torque of the polyethylene surface coated with MPC polymer reduced to 20% of that of non-coated polyethylene surface. And wear particle of the polyethylene component reduced by coating with MPC polymer.2. MPC particles could avoid from phagocyted by macrophages. This phenomenon shows that the MPC particles were not recognized as oreign body by reticulo-endotherial system.3. The concentration of cytokines, which are produced by macrophages that phagocytize wear particle and stimulate osteoclastic bone resoption are much lower in the MPC coated polymer group than the non-coated group. This phenomenon suggests that the MPC particles are not stimulate osteoclastic bone resoption.