Winged eccentric acetabular cup prosthesis

Abstract

The invention relates to the technical field of hip joint repairing surgery, in particular to a winged eccentric acetabular cup prosthesis. The winged eccentric acetabular cup prosthesis comprises anouter acetabular cup and an inner acetabular cup and is characterized in that the outer acetabular cup has a semispherical outer surface, and the semispherical outer surface of the outer acetabular cup is provided with three wings; the inner acetabular cup is provided with a semispherical inner cavity, and the sphere center of the semispherical inner cavity and the sphere center of the semispherical outer surface are staggered from each other; a plurality of limit mechanisms are evenly distributed at the edge of the inner wall of the outer acetabular cup, and a plurality of positioning mechanisms are evenly distributed at the edge of the outer wall of the inner acetabular cup. The winged eccentric acetabular cup prosthesis has the advantages that acetabular bone defect repairing is prevented from using traditional methods such as padding and bone grafting, the contact interface problem between a pad and an acetabular cup is avoided, the absorption problem of bone grafting is solved, complete contact between a host bone and the surface of the acetabular cup is achieved, the contact area and bone growth area of the prosthesis and the host bone, and the three wings increases the contact area of the acetabular cup and the host bone to a large extent and guarantees the initial stability of the acetabular cup.

Description

technical field [0001] The invention relates to the technical field of hip joint repair surgery, in particular to an eccentric acetabular cup prosthesis with wings. Background technique [0002] Hip replacement surgery was one of the first successful surgical procedures. The placement angle of the acetabular cup during operation is one of the decisive factors affecting postoperative clinical function and long-term stability. The current academic consensus is that the angle of the acetabular cup should be placed in a safe area, that is, the abduction angle is 45±10°, and the anteversion angle is 15±10°. If the angle of the acetabular cup exceeds the safe area, it will obviously affect the function and long-term stability of the artificial hip joint. [0003] At present, there is no unified treatment method for bone defect in hip arthroplasty, which generally includes compression bone graft, autologous or allogeneic femoral head bone graft, spacer, huge acetabular cup, reinf...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above technical problems, the object of the present invention is to provide a winged eccentric structure that solves the problem of the upward movement of the rotation center of the concentric acetabular cup during use, so as not to increase the stress of the acetabulum; at the same time, the eccentric structure can make the acetabular After the remaining bone bed in the bone defect is rasped and polished by the cup, the host bone is in direct contact with the porous cup, which provides good bone ingrowth and initial stability of the winged eccentric acetabular cup prosthesis

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