A total sacral artificial prosthesis

Abstract

The invention relates to a total sacral artificial prosthesis, which comprises a defect main body connected between the osteotomized end of the lumbar vertebral body and the osteotomized ends of the left and right iliac crests. The main body of the defect has three contact surfaces. The bone ends are in contact with the vertebral body contact surface, and the left and right ilium bone contact surfaces are in contact with the left and right ilium osteotomy respectively, and the vertebral body contact surface and the left and right ilium contact surfaces are all porous structures ; There is a hollow herringbone-shaped soft tissue attachment part between the vertebral body contact surface of the defect body and the left and right ilium osteotomy surfaces, and the soft tissue attachment part is also a pore-like structure; there are also several fixation holes on the defect body. The component fixes the defect main body between the osteotomized ends of the lumbar vertebral body and the osteotomized ends of the left and right ilium. The present invention adopts the herringbone design closest to the human bone structure, which can realize the reconstruction of the lumbar-iliac, posterior pelvic ring, and fusion of the front vertebral body, and realize the most stable mechanical environment of the "triangular" support, and can realize the reconstruction of the bone structure. Sexual fusion can be significantly improved from short-term structural recovery to long-term patient function and quality of life.

Description

technical field [0001] The invention relates to an artificial prosthesis, in particular to a total sacral artificial prosthesis used in sacral tumor resection and reconstruction operations. Background technique [0002] Sacral tumor resection has always been a difficult problem in the field of bone tumor surgery. Due to the complex anatomical site of the sacrum, preoperative radiotherapy and chemotherapy, and recurrence cases are common, all of these increase the difficulty of surgical resection of sacral tumors. The sacrum not only has important sacral nerves inside, but also the sacroiliac joint is the only structure that connects the axial bone and the bones of the lower limbs. Therefore, surgical resection of this site has a greater impact on neurological function and structural stability. For sacral tumors, due to the large resection range, the damage to local stability is serious, the recovery of stress conduction and the reconstruction of stability in the lumbosacra...

AI Technical Summary

Problems solved by technology

From a biomechanical point of view, due to the longer torque after lumbar pelvic fixation, this results in higher stress and shear force in the lumbosacral area. The above reconstruction methods cannot achieve complete fusion of the lumbar pelvis, resulting in stress mainly concentrated in the metal. Plants will be passively pulled out due to fatigue and fracture for a long time, which will cause the metal inner plant to lose its fixing effect

Although the use of bone grafts, hydroxyapatite, bone cement, and long screws can reduce the pull-out of metal implants, the problem of fatigue fracture of metal implants has not been solved, and it is difficult to achieve effective reconstruction

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