Assembled three-dimensional adjustable osseointegration semi-pelvic prosthesis

Abstract

The invention relates to an assembled three-dimensional adjustable osseointegration semi-pelvic prosthesis which comprises a customized sacrum osseointegration base, an acetabular cup assembly, a customized pubis osseointegration base, a sacrum side pelvic ring supporting assembly and a pubis side pelvic ring supporting assembly which are assembled in a split mode. One end of the customized sacrum osseointegration base is connected with the sacrum, and the other end of the customized sacrum osseointegration base is connected with the acetabular cup assembly through the sacrum side pelvic ring supporting assembly; one end of the customized pubis osseointegration base is connected with the uninjured side pubis, and the other end of the customized pubis osseointegration base is connected with the acetabular cup assembly through the pubis side pelvic ring supporting assembly; when the acetabular cup assembly, the sacrum side pelvic ring supporting assembly and the pubis side pelvic ring supporting assembly are assembled, the front rake angle of the acetabular cup assembly can be adjusted relative to the sacrum side pelvic ring supporting assembly and the pubis side pelvic ring supporting assembly. The semi-pelvic prosthesis and the pelvis of a patient form a complete and stable pelvic ring structure, the stability of the semi-pelvic prosthesis is improved, and the accuracy and simplicity of prosthesis installation during an operation are greatly improved.

Description

technical field [0001] The invention relates to the technical field of artificial half-pelvic prosthesis, in particular to a modular three-dimensional adjustable osseointegrated half-pelvic prosthesis. Background technique [0002] The pelvis is where bone tumors are most likely to occur. Due to the complex anatomical structure of the pelvis, it is a huge challenge for bone oncologists to reconstruct the function of the hemipelvis after pelvic tumor resection. At present, the tumor resection and reconstruction of pelvic tumors are mainly classified according to the Enneking classification, which can be divided into three types according to the anatomy: Type I: resection of the iliac crest; Type II: resection around the acetabulum; Type III: resection of the ischia and pubis; Type IV: resection of the pubic bone. The extent of resection involved the sacrum. For Enneking I+II+III zone pelvic malignant tumors. The task of reconstructing the hemipelvic prosthesis is particular...

AI Technical Summary

Problems solved by technology

[0004] First of all, in the actual clinical application, the integrated custom-made prosthesis is often difficult to install in the environment with complex structure and narrow space in the pelvic area, and a large amount of soft tissue separation is required, which causes great collateral tissue damage and affects the patient's postoperative recovery. recover

In addition, due to the limited space in the operation area, the large prosthesis structure may not be accurately installed in the preset area, which will affect the fixation effect and lead to poor follow-up results.

[0005] Secondly, the design of fully customized prosthesis is complicated. In order to realize the individualized customization of the prosthesis, a large amount of clinical data needs to be collected, the design cost is high, it takes a long time, and the patient spends a lot

[0006] Thirdly, fully customized prostheses require customized production, and prostheses need to be produced individually for each patient, resulting in high costs, long working hours, and long waiting times for patients

[0007] Finally, fully customized prostheses require precise data processing before surgery to ensure a high degree of matching between the prosthesis and the patient's pelvic anatomy. In the event of damage or pathological fracture, the produced prosthesis cannot continue to be used, which may lead to further prolongation of the production cycle

At the same time, the preoperative data collection is based on imaging data, and it is difficult to achieve accurate matching with the actual intraoperative situation. In practical applications, fully customized prostheses often have room for adjustment in details

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