Individualized pelvic prosthesis

Abstract

The invention relates to the technical field of medical instruments, and provides an individualized pelvic prosthesis. The individualized pelvic prosthesis comprises a solid part made of titanium alloy, a large aperture bone trabecula part made of titanium alloy, a small aperture bone trabecula part made of titanium alloy, a pterygoid lamina made of titanium alloy, and self tapping bone nails madeof titanium alloy, wherein the large aperture bone trabecula part made of titanium alloy comprises a first large aperture bone trabecula and a second large aperture bone trabecula; the small aperturebone trabecula part made of titanium alloy comprises a first small aperture bone trabecula and a second small aperture bone trabecula; multiple self tapping bone nails made of titanium alloy are arranged; and the installation position of the self tapping bone nails made of titanium alloy on the solid part made of titanium alloy corresponds to the bone position connected with the self tapping bonenails made of titanium alloy. The individualized pelvic prosthesis in the invention has the benefits that: the prosthesis is connected with the bone by adoption of ten bone nails; the bone nails aredivided into four groups; and the initial stability of the prosthesis is enhanced due to distributed and grouped distribution of the bone nails.

Description

technical field [0001] The invention relates to the technical field of medical instruments, and more specifically relates to a personalized pelvic prosthesis. Background technique [0002] Acetabular tumor is a kind of bone tumor. The acetabulum is composed of ilium, ischium, and pubic bone. Acetabular tumors often occur when two or three bones are involved at the same time, thus forming a periacetabular tumor. [0003] There are currently two surgical methods for acetabular tumors: one is hemipelvic amputation, which can achieve radical tumor resection, but the patient loses the affected limb and one side of the pelvis, resulting in poor quality of life and incomplete appearance. accept. The second is hemipelvic reconstruction. After tumor resection, the acetabulum is reconstructed through tumor bone inactivation and replantation, allogeneic hemipelvis transplantation, and artificial hemipelvic prosthesis reconstruction. [0004] Disadvantages of tumor bone inactivation a...

AI Technical Summary

Problems solved by technology

[0004]The disadvantages of tumor bone inactivation and replantation are relatively high local recurrence rate, incision infection, and nonunion of the bone end; the disadvantages of allogeneic hemipelvis transplantation are the incision caused by rejection Non-union, infection, bone resorption, non-union of the bone joint, etc. In the early stage of artificial hemipelvic prosthesis reconstruction, firm fixation can be achieved, early weight-bearing walking can be achieved, and functional recovery is faster, but screw breakage, prosthesis loosening, joint dislocation, etc. will occur in the later stage complication

[0005] The prior art CN206560486U discloses a prosthesis structure around the acetabulum, which solves the problems of complications such as screw breakage, prosthesis loosening and joint dislocation that are prone to occur in the later stage of artificial hemipelvic prosthesis

But it still has the following disadvantages: (1) the weight of the prosthesis is large, which is not conducive to human activities; (2) there is stress concentration in the prosthesis, which is not conducive to the stability of the prosthesis; It is beneficial to the initial stability of the prosthesis; (4) The bone expansion of the prosthesis is slow, which is not conducive to the initial stability of the prosthesis; (5) The effect of the bone expansion of the prosthesis is not good, which is not conducive to the long-term stability of the prosthesis

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