Pelvic prosthesis

Abstract

The invention relates to a pelvic prosthesis which comprises a pelvic support, an acetabular cup and a connecting mechanism detachably installed on the pelvic support and used for being connected withthe acetabular cup. The connecting mechanism comprises a first connecting column installed on the pelvis support, a second connecting column installed on the acetabular cup and a supporting arm usedfor connecting the first connecting column and the second connecting column. The supporting arm is configured to restore the rotation center of the acetabular cup by adjusting an angle between the first connecting column and the pelvis support and the angle between the second connecting column and the acetabular cup. The acetabulum rotation center recovery with different osteotomy conditions can be satisfied. The pelvic prosthesis has the advantages of being simple in structure, capable of achieving mass production, wide in applicability, easy to popularize and the like.

Description

technical field [0001] The invention belongs to the technical field of artificial prostheses, in particular to a pelvic prosthesis. Background technique [0002] The pelvis is composed of left and right hip bones, acetabulum, sacrum, and coccyx, as well as the bony connections between them. Pelvic bone tumors are a relatively common disease in pelvic injuries. challenge. [0003] Because the resection of pelvic tumors will cause bone defects, and the bone defects need to be reconstructed through the pelvis to achieve continuity and stability between the patient's pelvis and other bone tissues, so as to maintain the necessary daily life of the patient, such as sitting and walking. [0004] For the reconstruction after pelvic tumor resection, the prior art discloses a geared half pelvis, see figure 1 , can realize the change of the acetabular anteversion angle, and can also realize the rotation of the center of rotation around the trajectory of the screw 23 as a circle, but ...

AI Technical Summary

Problems solved by technology

[0004] For the reconstruction after pelvic tumor resection, the prior art discloses a geared half pelvis, see figure 1 , can realize the change of the acetabular anteversion angle, and can also realize the rotation of the center of rotation around the trajectory of the screw 23 as a circle, but it cannot be rotated to other positions other than the circular trajectory. Even if the prosthesis is customized according to the tumor location, it cannot Due to the inaccurate osteotomy during the operation, the actual rotation center of the acetabulum is inconsistent with the ideal rotation center, resulting in hip dislocation, instability, left-right asymmetry, etc.

[0005] Due to the different locations of pelvic tumors in each patient, the degree of bone defect after tumor resection is different, and the existing pelvic prosthesis cannot meet the applicability of patients with different degrees of bone defect, and cannot well restore the center of acetabular rotation.

Images