Hip replacement joint comprises ball and socket, surface of ball being etched to roughen it by forming microstructure of grooves

摘要

Hip replacement joint comprises a ball (2) and socket (3). The surface (4) of the ball is etched to roughen it by forming a microstructure of grooves. Independent claims are included for: (a) a composite surface for a joint comprising an etched, roughened surface as above with a coating over it; and (b) a method for making the joint, as described above.