Abstract: A bionic acetabular prosthesis has a spherically cap-shaped cup body. The body is inwardly concave at the bottom to form a hollow cavity, and has on its outer wall surface, annular collars, each having a trapezoidal cross-section with a larger base portion and a smaller top portion. The collars are provided with circumferentially-spaced notches, having a recessed depth smaller than or equal to a raised height of the collars. Slopes of opposite side faces of the cross-sectionally trapezoidal collars on the cup body avoid the formation of defects in the surface of the hollow cavity, ensuring good quality of the resulting acetabular prosthesis. In addition, notches may be arbitrarily formed in the collars. These notches interact with bone cement to restrict circumferential rotation of the cup body. Gently sloped surfaces of adjacent collars join and define annular grooves, which contain more bone cement, stabilizing the cup body.

Abstract: Disclosed are an acetabular cup and a hip joint prosthesis assembly, falling within the technical field of medical instruments. The hip joint prosthesis assembly uses an acetabular cup formed by combining two layers of metal bodies, and the acetabular cup can meet the strength requirements of the cup body while ensuring that the sum of wall thicknesses of an outer cup and an inner cup is small, thereby increasing a relative rotation angle between a sphere head and the acetabular cup. The outer cup material is conducive to the fusion of the acetabular cup and the hip bone, and a spherical coronal working surface of the inner cup has high smoothness and wear-resistant hardness, which can ensure the bone ingrowth performance of the hip joint prosthesis and reduce the wear rate of the non-metallic spherical prosthesis.

Abstract: Disclosed are an acetabular cup and a hip joint prosthesis assembly, falling within the technical field of medical instruments. The hip joint prosthesis assembly uses an acetabular cup formed by combining two layers of metal bodies, and the acetabular cup can meet the strength requirements of the cup body while ensuring that the sum of wall thicknesses of an outer cup and an inner cup is small, thereby increasing a relative rotation angle between a sphere head and the acetabular cup. The outer cup material is conducive to the fusion of the acetabular cup and the hip bone, and a spherical coronal working surface of the inner cup has high smoothness and wear-resistant hardness, which can ensure the bone ingrowth performance of the hip joint prosthesis and reduce the wear rate of the non-metallic spherical prosthesis.