Kyocera Medical Corporation

Masami Hashimoto

Hiroshi Kawaguchi

Kozo Nakamura

Kazuhiko Ishihara

Masayuki Kyomoto

Takeshi Nizuka

Toru Moro

Tomohiro Konno

Yoshio Takatori

Noboru Yamawaki

Makoto Kondo

Hiroaki Takadama

The present invention provides a bearing material that is excellent in durability and is capable of maintaining wear resistance over a long period of time. The bearing material of the present invention is a high wear-resistance bearing materialfor being used under a humid environment comprising: a base bodymade of a polymer material having a methylene group; and a polymer layercovering a bearing surfaceof the substrate, the polymer layercomprising polymer chains which have a phosphorylcholine group and are grafted from the bearing surface, wherein a phosphoric index of the sliding surfacewhich is calculated by dividing a peak intensity of phosphate group in an infrared spectrum measured on the sliding surface by a peak intensity of the methylene group therein is not less than 0.28.

High wear-resistant bearing material and artificial joint replacement using the same

Growing community of inventors

Aichi, Japan

Masami Hashimoto