Three-joint artificial pelvic prosthesis fixed through lumbosacral vertebrae

Abstract

The invention relates to a three-joint artificial pelvic prosthesis fixed through lumbosacral vertebrae. The prosthesis comprises an ilium wing base, a double-cylinder-shaped connector, an acetabular connector and an acetabular body, wherein the ilium wing base comprises a connecting plate and a wing plate which are integrally arranged, a cylindrical boss is formed on a connecting seat, and a first gear ring is processed at the root of the boss; the double-cylinder-shaped connector comprises an upper cylinder and a lower cylinder which are integrally arranged, an upper gear ring and a lower gear ring are machined at the open ends of the upper cylinder and the lower cylinder respectively, the connecting plate is inserted into the upper cylinder through the boss, and the first gear ring is meshed with the upper gear ring; the lower half part of the acetabular connector is of a conical cylinder-shaped structure, the upper half part of the acetabular connector is of a gear structure, and the gear structure is meshed with the lower gear ring of the double-cylinder-shaped connector through a second gear ring at the end; and the acetabular body comprises an acetabular cup and a conical columnar structure which are integrally arranged, and the conical columnar structure is fixed to the conical cylinder-shaped structure of the acetabular connector in a conical connection mode. According to the invention, flexible adjustment of flexion and extension, forward inclination and abduction angles of the hip joint in the pelvic prosthesis operation can be achieved, and therefore flexible adjustment and installation of the pelvic prosthesis in the operation are facilitated.

Description

technical field [0001] The invention relates to an artificial pelvic prosthesis, in particular to a three-joint artificial pelvic prosthesis fixed through the lumbosacral vertebrae, and belongs to the technical field of medical devices. Background technique [0002] Ewing sarcoma in children, osteogenic sarcoma, and chondrosarcoma in adults are the most common primary sarcomas of the pelvis, as are pelvic metastases from the breast, lung, prostate, kidney, and thyroid. Malignant neoplastic invasion of the pelvis is common, with destruction around the acetabulum being the main concern. Such patients suffer from severe pain and severely limited function, and treatment effects such as reduced weight bearing and radiation therapy are limited. In the past, hemipelvic amputation was often used for malignant tumors of the pelvis. At the same time, the surgical treatment of malignant bone tumors around the acetabulum is very difficult, and hemipelvic amputation has been the main t...

AI Technical Summary

Problems solved by technology

The characteristics of 3D printing technology just meet the special requirements of orthopedic implant devices: (1) Bone tissue is a typical representative of complex structures, and it is difficult for existing bionic technologies to replicate its unique three-dimensional shape and physiological functions

3D printing is suitable for the rapid manufacture of complex structures, and can obtain nearly ideal bone repair materials; (2) Due to the high degree of individual specificity in the human body, traditional large-scale and mass-produced medical products cannot meet individual needs, while In the past, personalized and customized products using molds and other manufacturing processes were expensive and had a long cycle

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