Dislocation-resistant hip joint prosthesis of 3D printing femoral head and manufacturing method thereof

Abstract

Dislocation-resistant hip joint prosthesis of a 3D printing femoral head comprises an acetabulum lining. The dislocation-resistant hip joint prosthesis is characterized in that a hemispherical grooveis formed in the acetabulum lining, the edge of the hemispherical groove integrally extends to form an ultra-diameter buckling edge, 3D printing femoral head prosthesis is arranged inside the acetabulum lining, is spherical and is uniform to size of inside space of the acetabulum lining, diameter of an opening of the ultra-diameter buckling edge is smaller than that of the 3D printing femoral headprosthesis, and femoral neck prosthesis is arranged on the 3D printing femoral head prosthesis.

Description

technical field [0001] The invention relates to the medical field, in particular to a 3D printed femoral head anti-dislocation hip joint prosthesis and a manufacturing method thereof. Background technique [0002] Artificial total hip replacement has been used as a routine operation for the treatment of severe hip osteoarthritis, advanced femoral head necrosis and femoral neck fracture in the elderly, and its curative effect has been clinically confirmed. Osteoarthritis disease, until now young patients have recovered good function of the hip joint through hip replacement surgery. The progress of bioengineering and material science undoubtedly plays a pivotal role, but there are also some complications after hip replacement surgery, such as aseptic Sexual loosening, periprosthetic infection and dislocation after hip replacement. Previous studies have reported that the incidence of prosthetic dislocation after hip replacement is 1% to 3%, second only to aseptic loosening, an...

AI Technical Summary

Problems solved by technology

First of all, increasing the diameter of the femoral head will inevitably reduce the thickness of the acetabular lining, thereby affecting the life of the acetabular lining

Furthermore, previous studies have found that increasing the diameter of the femoral head will increase the wear between the acetabular lining and the femoral head, thereby affecting the life of the prosthesis

2. Increase the local high side of the acetabular lining to form a super radius of the acetabular lining, which can increase the tolerance of the acetabular lining to the femoral head. However, the acetabular lining and the femoral head are currently manufactured separately. Considering the For femoral head penetration, the high-side design of the acetabular lining is limited, and as a result, it can only reduce the occurrence of dislocation to a certain extent

However, on the one hand, its locking mechanism is mechanical locking, which relies on the super-radius high side of the acetabular lining to constrain the femoral head. During the operation, external force is required to forcibly insert it. This insertion method will damage its locking mechanism. In clinical observation, postoperative hip dislocation still occurs.

And it is easy to cause recurrent hip dislocation after the initial dislocation

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