Personalized semi-pelvic prosthesis and making method thereof

Abstract

The invention discloses a personalized semi-pelvic prosthesis and a making method thereof. The personalized semi-pelvic prosthesis comprises a sacrum base, a connecting piece and a femoral joint handle, wherein the sacrum base comprises a sacrum support and a stress conduction tube; the sacrum support is L-shaped, and a through hole is formed in the center of the corner of the sacrum support; the stress conduction tube is an arc tube, and the high end of the stress conduction tube is fixedly connected inside the through hole; the connecting piece comprises a connecting arm and a joint ball head; the connecting arm is an arc arm matched with the arc tube; the joint ball head is arranged at the lower end of the connecting arm; the connecting arm is coaxially arranged in the stress conduction tube; the femoral joint handle comprises a lifting cup; and the joint ball head is spherically hinged inside the lifting cup. The inherent biomechanical properties of the original pelvis are obtained through finite element analysis by a stress conduction channel, so that the stability and reliability of connection can be improved. Through the arrangement of the joint ball head and the lifting cup, a reverse spherical lifting joint is formed, so that the work weight can be better borne, weight bearing is facilitated, the degree of freedom is larger, postoperative early-stage activities are facilitated, and the living quality of a patient is obviously improved.

Description

technical field [0001] The invention belongs to the technical field of high-value medical consumables, and in particular relates to a personalized semi-pelvic prosthesis and a manufacturing method thereof. Background technique [0002] The structure and biomechanics of the pelvis are complex, and the process of tumor pelvic resection and reconstruction of pelvic damage caused by trauma is the focus and difficulty of current clinical research. Especially for hemipelvic reconstruction after pelvis I-IV resection, how to design and manufacture a prosthesis that conforms to the biomechanical conduction channel of the pelvis to minimize postoperative prosthetic loosening, fixation device breakage and other complications and maintain long-term stability of the prosthesis is an important issue at present. difficulty. [0003] The existing personalized hemi-pelvic prosthesis fixes the sacrum on the flanks of the sacral seat, and then fixes the acetabular cup under the sacral seat, ...

AI Technical Summary

Problems solved by technology

[0003] The existing personalized hemi-pelvic prosthesis fixes the sacrum on the flanks of the sacral seat, and then fixes the acetabular cup under the sacral seat, instead of directly fixing it to the sacrum. The fixation method does not conform to the inherent biomechanical channel of the original pelvis. The contact surface of the sacrum fails to form a permanent link, which leads to the loosening of prosthetic screws and increased incidence of complications such as screw breakage. Moreover, patients cannot get out of bed early. During hemipelvic resection for pelvic tumors, they face huge soft tissue defects and face repair. The soft tissue around the joint is difficult, the center of rotation is difficult to grasp, the incidence of dislocation is high, the patient cannot bear weight well in the early postoperative period, and long-term bed rest is not conducive to rapid postoperative recovery

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