And artificial joint members, aimed sliding member can maintain the abrasion resistance over a long period of time, the thinning of the polymer substrate, the present invention, prosthesis showing high lubricity in the body, biocompatible, anti-dislocation of about. Specifically, polymeric substrate having on its surface a ketone group of (A) at least part of the surface of the coating layer composed of a graft polymer having a density of 1.4g / cm 3 or more, including phosphorylcholine groups present invention, ( and a B), and to provide a polymer sliding material. The sliding material was immersed polymer substrate (A) to (C) monomer solution containing a phosphorylcholine group may be formed by a surface graft polymerization by light irradiation. The present invention provides an artificial joint and an artificial joint member using the polymer sliding material.本発明は、長期間にわたって耐摩耗性を維持できる摺動部材、ポリマー基材の薄厚化を図った人工関節部材、及び、体内での高潤滑性、生体適合性、抗脱臼性を示す人工関節に関する。具体的には、本発明は、ケトン基を表面に有するポリマー基材(A)の少なくとも一部の表面に、ホスホリルコリン基を含む1.4g/cm3以上の密度のグラフトポリマーからなる被覆層(B)を有する、ポリマー摺動材料を提供する。該摺動材料は、ホスホリルコリン基を含むモノマー(C)液中にポリマー基材(A)を浸漬し、光を照射して表面グラフト重合によって形成し得る。本発明はまた、該ポリマー摺動材料を用いた人工関節部材および人工関節を提供する。
