Pelvic prosthesis

Abstract

The present invention provides a pelvic prosthesis. The pelvic prosthesis comprises an acetabular cup, an ilium support and a pubis plate are respectively arranged on the acetabular cup, an ilium support connecting plate is arranged on the ilium support, and tantalum coating porous bone trabecular interfaces are arranged at a contact part of the ilium support connecting plate and an ilium, a contact part of the pubis plate and a pubis, and a contact part of the ilium support and human body; a shape of the ilium support is irregular polygon, a plurality of locking long nail holes are arranged in the ilium support, axial directions of the plurality of the locking long nail holes are different, and locking long nails penetrate through the locking long nail holes of the ilium support to be connected with sacrum or lumbar vertebrae. The tantalum coating porous bone trabecular interfaces on the ilium support can ensure a sufficient bonding strength of the prosthesis and a host bone interface, improve long-term stability of the prosthesis in vivo and realize deep fusion of the prosthesis and a host bone tissue; the tantalum coating porous bone trabecular interfaces of the ilium support connecting plate increase stability and safety of the prosthesis and can play roles in mechanical support and bone ingrowth; and the locking long nail holes increase the stability of the prosthesis andreduce mounting difficulty of the prosthesis..

Description

technical field [0001] The invention relates to the technical field of orthopedic implants, in particular to a pelvic prosthesis. Background technique [0002] The pelvis is composed of the left and right hip bones, the sacrum, the coccyx and the bone connections between them. The hip bones are composed of the ilium, pubic bone, and ischium. The three bones meet in the acetabulum, and the fusion cannot be completed until about adulthood. [0003] Pelvic bone tumor is a relatively common disease in pelvic injuries. Due to its complex structure and shape, and the resection range of pelvic tumor is the only way for the body to bear gravity, it is difficult to accurately resect the tumor and reconstruct it after tumor resection. Especially reconstructions, especially pelvic tumors involving the acetabulum. For pelvic metastases, the purpose of surgery is to relieve cancer pain or prevent pathological fractures. However, the main complications of artificial hemipelvic prosthesi...

AI Technical Summary

Problems solved by technology

The existing standard pelvis has the following problems. It cannot meet the adaptability to patients with different degrees of bone defect, the stability is poor, and the bonding strength between the prosthesis and the host bone interface is poor. The degree of bone defect is different, and the recovery of the center of acetabular rotation cannot be achieved well.

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