PURPOSE: To reduce the sliding resistance and provide a high performance artificial joint by forming a chemical absorptive film containing fluorine on the surface of the artificial joint through a siloxane film.
CONSTITUTION: In the application to an artificial joint for knee, an alumina knee joint 1 after finishing the work is washed with an organic solvent. Into a solution in which CF3(CF2)7(CH2)2SiCl3 is dissolved in a mixed solution of 80% n-hexadecane, 12% carbon tetrachloride, and 8% chloroform in the concentration of 10%, only the joint part of the knee joint 1 is dipped for 2 hours. Since the alumina surface of the joint part of the knee joint 1 contains a number of hydroxyl groups, the carbon fluoride group and the SiCl group and hydroxyl group of a chlorosilane surfactant causes a dechlorination reaction to form a single film 2 containing fluorine over the whole sliding surface of the knee joint, and the sliding resistance of the knee joint 1 is reduced.
MINO NORIHISA
SOGA SANEMORI
