Total sacrum artificial prosthesis

Abstract

The invention relates to a total sacrum artificial prosthesis. The total sacrum artificial prosthesis comprises a coloboma body connected among the bone cutting end of a lumbar vertebral body, the bone cutting end of a left ilium and the bone cutting end of a right ilium, the coloboma body is provided with three contact faces, the contact face making contact with the bone cutting end of the lumbar vertebral body is a vertebral body contact face, the contact face making contact with the bone cutting end of the left ilium is a left ilium contact face, the contact face making contact with the bone cutting end of the right ilium is a right ilium contact face, and the vertebral body contact face, the left ilium contact face and the right ilium contact face are all of a porous structure; a hollow inverted-Y-shaped soft tissue adhering part is formed among the vertebral body contact face of the coloboma body, the bone cutting face of the left ilium and the bone cutting face of the right iliumm, and the soft tissue adhering part is also of a porous structure; the coloboma body is further provided with a plurality of fixing holes, and the coloboma body is fixed among the bone cutting end of the lumbar vertebral body, the bone cutting end of the left ilium and the bone cutting end of the right ilium through fixing elements. The inverted-Y-shaped design closest to the human body bone structure is adopted, reconstruction of the three aspects of the waist-the ilium, a posterior pelvic ring and anterior vertebrae fusion can be achieved, triangular supporting is achieve so that the most stable mechanical environment can be achieved, bone fusion can be achieved, and remarkable improvement can be achieved in the aspects of recent structure restoration and functions and living quality of patients in the future.

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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