Bionic type hydraulic movable artificial vertebral body

Abstract

The invention discloses a bionic type hydraulic artificial vertebral body design for spinal physiological function reconstruction. The bionic type hydraulic artificial vertebral body comprises a main cylindrical artificial vertebral body with a core structure, wherein the inner part of the core structure contains pistons (13 and 14) and hydraulic bags (10 and 11). An upper end plate (24) and a lower end plate (25), which are matched with semielliptical (spherical) motion shafts (21 and 22) in structure, are arranged at two ends of each piston. The end plates of the artificial vertebral body are normal adjacent vertebral end plate flats (cemented fixation) or fixed stings (31 and 32) with metal millipores and biological material coating millipores (biological type fixation), and the rear edge of the vertebral body can be further fixedly arranged at a pedicle of vertebral arch through card slots (40 and 41) of the fixed structure of a pedicle of vertebral arch staple bolt (45). The vertebral body design can be further shrunk as a hydraulic artificial intervertebral 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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