Patent ID: 9144497
Filing Date: 2015-09-29
Classification: A61F

Abstract:
1. An acetabular cup assembly for an artificial hip joint, comprising: an acetabular cup comprising a seating recess surrounded and defined by an inner wall where a female taper is formed along an entire area, a plurality of protrusion recesses formed in the bottom of the inner wall and caved in a predetermined depth in the radial direction such that they communicate with the seating recess and are disposed along a circumferential direction, and a plurality of insertion recesses formed inside the plurality of protrusion recesses and caved in a predetermined depth; and a bearing comprising a polyethylene bearing made of a polyethylene material which comprises an outer circumference having a male taper, a plurality of protrusions protruding in the radial direction on the lower portion of the outer circumference, and a plurality of insertion protruding portions protruding on the outer portion of each of the protrusions, wherein the plurality of protrusion recesses are disposed along the circumferential direction of the acetabular cup, and the plurality of protrusions are disposed along the circumferential direction of the polyethylene bearing, and in a case where the polyethylene bearing is engaged with the acetabular cup, each protrusion of the polyethylene bearing is inserted into each protrusion recess of the acetabular cup, and each insertion protruding portion of the polyethylene bearing is inserted into each insertion recess of the acetabular cup, and the male taper of the polyethylene bearing is engaged with the female taper of the acetabular cup.