A bionic hydraulic movable artificial vertebral body

Abstract

The invention discloses a bionic hydraulic artificial vertebral body design for spinal physiological function reconstruction, which comprises a columnar artificial vertebral body body containing pistons (13, 14) and hydraulic capsules (10‑11) core structures, and the two ends of the piston are The upper and lower endplates (24, 25) with semi-elliptical (spherical) motion axes (21, 22) structure matching, the artificial vertebral body endplate and the normal adjacent vertebral body endplate (fixed by bone cement) or with metal microholes And the fixed nail (31, 32) structure of the biomaterial coating micropore (biological type fixation), the posterior edge of the vertebral body can be further fixed on the Pedicle; the artificial vertebral body design can be further miniaturized into a hydraulic artificial disc design (60).

Description

technical field [0001] The invention relates to a medical device, in particular to a bionic hydraulic movable artificial vertebral body for reconstructing the physiological function of the spine after spinal defect. Background technique [0002] Spinal fusion technology is the mainstream concept in modern spinal surgery, and it has achieved good clinical results in the treatment of spinal defects. [0003] Clinically, for bursting comminuted vertebral fractures and vertebral tumors, fusion-type artificial vertebral bodies are often used to reconstruct the missing vertebral body parts. However, clinically, the function of two intervertebral discs will be lost after vertebral body excision and fusion for one vertebral body lesion. , that is, fusion of vertebral bodies of at least three segments, sacrificing the motion function of the original spinal vertebral discs. [0004] With the wide clinical application of spinal fusion, new problems caused by complications after fusion...

AI Technical Summary

Problems solved by technology

The effect of rotation force on the annulus fibrosus of the intervertebral disc produces traction and torsion damage, resulting in the micro-avulsion fracture of the annulus fibrosus at the posterior edge of the vertebral body (the annulus fibrosus at the posterior edge of the vertebral body is weak), and the micro-avulsion fracture of the annulus fibrosus leads to a fracture of the intervertebral disc. The original airtight performance is damaged

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