Artificial intervertebral disk insertion jig, jig set, and artificial intervertebral disk

Abstract

A self-sustained artificial intervertebral disk that has flexible nearly ideal mechanical transformation characteristics and durability, exhibiting high vertebra bonding fixing force; and an artificial intervertebral disk insertion jig capable of easily and securely inserting and setting this artificial intervertebral disk between adjoining vertebrae. There is provided an artificial intervertebral disk comprising a core material constituted of a texture structure obtained by forming an organic fiber into a triaxial or further multiaxial three-dimensional woven texture, or knitted texture, or composite texture thereof and, superimposed on both upper and lower surfaces of the core material, plates of a polymer capable of being in vivo decomposed and absorbed which contains a bioactive bioceramic powder. Preferably, the superimposed plates are those having a multiplicity of holes made therethrough, the through-holes optionally packed with a material capable of being in vivo decomposed rapidly and absorbed, the material exhibiting bone conduction and / or bone induction properties. Further, there is provided an insertion jig comprising a combination of upper jig and lower jig fitted together so as to be capable of avoiding detachment in the vertical direction and capable of sliding back and forth, and further comprising an upper holding part and lower holding part for holding the artificial intervertebral disk, respectively disposed in front parts of the upper jig and lower jig.

Description

technical field [0001] The present invention relates to a self-contained, biomimetic artificial intervertebral disc having a configuration comprising a fibrous structure comprising a three-dimensional braided material such as a core material; an artificial intervertebral disc insertion jig for easily inserting the artificial intervertebral disc between adjacent vertebral bodies, and fix them in correct positions; and a jig device, which includes an artificial intervertebral disc insertion jig and an insertion guide jig. Background technique [0002] Various artificial intervertebral discs have been developed. Among the useful artificial discs are the artificial discs of sandwich construction, which consist of upper and lower metal plates, which are made of, for example, Nitinol alloy, and arranged in the middle of the plates are spheres of ultra-high molecular polymer, which act as ball bearings and give the disc required mobility. Although the mobility of the artificial i...

AI Technical Summary

Problems solved by technology

However, there is a concern that as bone fibers invade and grow within the liner, it could deform due to weight

There is a possibility here that the fusion between the liner and the vertebral body and the artificial disc may become incomplete due to the bone fiber replacement liner, resulting in a weakened force that binds / fixes the upper and lower vertebral bodies

In addition, the liner consists of a porous substance, is fragile, and therefore there is also the possibility that the liner edge wears away producing fine particles

In addition, since the core material of the artificial intervertebral disc is a three-dimensional fibrous structure, the technique of forming a screw hole therein and screwing the front end of the rod-shaped insertion jig into the hole axis prepared before insertion, as in the case of the cage in Patent Document 1, cannot be used. for inserting an artificial disc between the vertebral bodies

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