Sacrum and pelvis combined prosthesis

Abstract

The invention discloses a sacrum and pelvis combined prosthesis, which comprises a sacroiliac fixation part, a connecting rod and a mortar cup assembly. The sacroiliac fixation part is detachably connected with one end of the connecting rod, and the mortar cup assembly is detachably connected with the other end of the connecting rod. A sacroiliac fixation member includes a spinal fixation assemblyand an iliac bone fixation assembly, a side of the spinal fixation assembly and the spinal fixation is provided with a first spike structure, a first screw hole and a first growth hole, screws passing through the first spike structure and the first screw hole are used for fixing the spinal column, the first growth hole is used for bone growth penetration, the side of the iliac bone fixation assembly and the iliac bone fixation is provided with a second spike structure, a second screw hole and a second growth hole, the second spike structure and screws passing through the second screw hole areused for fixation of the iliac bone, and the second growth hole is used for bone growth penetration. The prosthesis of the invention can be used for reconstruction after total sacrum and semi-pelvichip joint resection, and has great significance.

Description

technical field [0001] The invention belongs to an artificial prosthesis, in particular to a joint prosthesis of the sacrum and pelvis. Background technique [0002] The biomechanical role of the sacrum is to transfer weight from the lumbar spine downwards to the ilium on both sides through the bilateral sacroiliac joint surface, that is, the lumbar spine and the bilateral ilium are connected to form a triangular stable support. The existing reconstruction after total sacrectomy requires a screw-rod system to connect the lower lumbar spine and bilateral ilium. The screw-rod system is an internal fixation device rather than a prosthesis, which can only provide initial stability, and long-term stability depends on bone healing. After total sacrectomy, there are huge local bone defects, bone healing is impossible to achieve spontaneously, and bone grafting is very difficult; long-term follow-up results show that there are some hidden dangers in the reconstruction of the sacroi...

AI Technical Summary

Problems solved by technology

Modular prosthesis can provide long-term stability, but requires proper ilium residue; screw-rod fixed prosthesis cannot provide long-term stability, and there is a huge bone defect, while bone grafting is also difficult, and long-term follow-up is prone to loosening, Fracture and other issues

[0004] The above-mentioned reconstruction methods used for total sacrum resection and hemipelvic resection respectively cannot be used for reconstruction after combined total sacrum and hemipelvic hip resection. This field is currently blank, and there is currently no reconstruction method

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