Assembled artificial vertebra

Abstract

The invention relates to an assembled artificial vertebra. The assembled artificial vertebra is characterized by comprising a trapezoidal component or two trapezoidal components and a U-shaped or H-shaped base, wherein the trapezoidal component comprises a tapered joint body and an end plate disposed on the tapered joint body; the U-shaped base is a cylinder with the top open and the bottom closed, a tapered joint groove matching with the tapered joint body of the trapezoidal component is formed in the U-shaped base, and the tapered joint body of the trapezoidal component is pressed in the tapered joint groove of the U-shaped base; the H-shaped base is a cylinder with two ends open and a middle transverse bottom, tapered joint grooves matching with the tapered joint bodies of the trapezoidal components are formed in two sides of the transverse bottom, and the tapered joint bodies of the two trapezoidal components are pressed in the tapered joint grooves of the H-shaped base respectively from two ends of the H-shaped base; the contour of the artificial vertebra is in arc-shaped curve design. The assembled artificial vertebra can be widely applied to bone defect reconstruction aftervertebral tumor excision and can be improved remarkably from near-term structure recovery to long-term function and living quality of patients.

Description

technical field [0001] The invention relates to an artificial prosthesis, in particular to a modular artificial vertebral body used in vertebral body resection and reconstruction. Background technique [0002] Infectious diseases such as spinal tumors, severe vertebral fractures, and spinal tuberculosis can often cause damage to the vertebral body, resulting in compression of the spinal cord, nerve roots, and angular deformity of the spine caused by vertebral body collapse. In this case, vertebral body resection is often required surgery. Especially for spinal tumors, the entire or even multiple vertebral bodies are often involved. Due to the large resection range, the local stability is severely damaged. If there is no effective reconstruction, the internal fixation failure of the patient often occurs after surgery, which will lead to severe neurological function. damage and spinal deformity. [0003] As early as 1969, Hamdi first reported the resection of vertebral tumor...

AI Technical Summary

Problems solved by technology

Among them, titanium mesh is the most widely used, but the titanium mesh and its internal bone graft block are only in point contact with the upper and lower vertebral bodies, and the ability of bone conduction is very limited, which often cannot achieve reliable bone graft fusion.

In addition, the sharp edges of the titanium mesh may cut the upper and lower vertebral body endplates, resulting in the subsidence, loosening, and even prolapse of the implants. In some patients, paraplegia may even occur due to the loosening, shifting, and compression of the spinal cord by the titanium mesh.

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