CN102232879A

CN102232879A - Artificial disc

Info

Publication number: CN102232879A
Application number: CN2010101576477A
Authority: CN
Inventors: 蒋秀英; 李郁松
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-04-23
Filing date: 2010-04-23
Publication date: 2011-11-09

Abstract

The invention discloses an artificial disc which is designed into four parts, namely an upper base, a nucleus pulposus, a lower base and a cylindrical envelope, wherein the upper base and the lower base are rigid; the top of the upper base is set into a raised rear edge and a low-level front edge; the nucleus pulpous is made of an elastic material and is easy to compress and deform; and the upper base, the nucleus pulposus and the lower base are wrapped by the cylindrical envelope to form a whole. The flexion of a vertebral column enables the nucleus pulpous to be adaptively deformed; when the vertebral column forwards flexes, the upper base is used for compressing and deforming the nucleus pulposus and slides relative to the lower base; and when the vertebral column backwards flexes, the nucleus pulposus is deformed by compression but the base returns or stays at the central part relative to the lower base. With the design, the motion of the artificial disc is closer to the motion mode of an intervertebral disc of a human body, thereby the possibility that the adjacent intervertebral discs degenerate is reduced.

Description

A kind of artificial intervertebral disk

Technical field

The present invention relates to medical field, particularly the spinal column artificial intervertebral disk.

Background technology

The spinal column artificial intervertebral disk, being applied at present clinical has a variety ofly, but its motor pattern differs greatly with actual human intervertebral disc motor pattern, may quicken the adjacent discs regression behind its implant into body.

Summary of the invention

The technical problem to be solved in the present invention be to provide a kind of promptly with the more close artificial intervertebral disk of actual intervertebral disc motion pattern.

Design concept of the present invention is that artificial intervertebral disk is when spinal column bends and stretches, can as normal human's intervertebral disc, be out of shape creep, intervertebral disc compression when anteflexion, anterior big than the rear portion degree, after compression when stretching, anterior little than the rear portion degree, and during with flexion and extension the upper vertebral body of intervertebral space with respect to the front and back displacement of the next vertebral body, upper vertebral body is with respect to the slippage forward of the next vertebral body when anteflexion, after be maintained at centre bit, not slippage backward when stretching.Thereby make the artificial intervertebral disk motion than motor pattern near human intervertebral disc.

Based on above design, the present invention adopts following technical scheme: a kind of artificial intervertebral disk comprises upper bed-plate, deformable vertebral pulp, lower bottom base and four parts of tubular peplos.Up/down base is rigidity, anticorrosive material, and upper bed-plate top soleplate face is pressed with the titanium silk and bone induces coating to be used for and soleplate sclerotin strong bonded, and its bottom vertebral pulp face is the ball-and-socket shape, and the surface is the coarse particles face, helps increasing the resistance to sliding with vertebral pulp; Lower bottom base bottom soleplate face is a circular flat, the surface is pressed with the titanium silk and bone induction material is used for and soleplate bone strong bonded, its top vertebral pulp face is similar ball-and-socket shape, but the forward position is lower than the center of base vertebral pulp face, helps when anteflexion, the slippage forward of upper bed-plate distortion vertebral pulp, tailing edge is higher than the center of base vertebral pulp face, and when stretching after helping, upper bed-plate is slippage backward not, same vertebral pulp face is the coarse particles face, reduces the relative slip with vertebral pulp; Vertebral pulp is the diameter that cylindrical its diameter is slightly less than base, and the shape of its upper base seat surface and the seat surface of going to the bottom and the vertebral pulp face of Up/down base are coupled.Tubular peplos will accompany the Up/down base parcel of vertebral pulp, and its two ends are fixed on the outer wall of Up/down base by the mode of tying up, thereby form an integral body, and tubular peplos is toughness and with elastic material.

Spinal column bends and stretches and causes vertebral pulp adaptability distortion, when flexion of vertebral column, upper bed-plate distortion vertebral pulp and slippage forward, after when stretching, although vertebral pulp distortion upper bed-plate is replied or stayed in centre bit.This kind design makes the artificial intervertebral disk motion relatively near the human intervertebral disc motor pattern, thereby has reduced adjacent discs regression probability.

Description of drawings

Fig. 1 is the structure chart of a kind of artificial intervertebral disk of the present invention.

Fig. 2 is the exploded view of a kind of artificial intervertebral disk of the present invention.

The specific embodiment

The invention will be further described below in conjunction with the drawings and specific embodiments:

Novel artificial intervertebral disc shown in Figure 1 comprises a upper bed-plate 1, vertebral pulp 2, a lower bottom base 3 and a tubular peplos 4.

Mounting means of the present invention is as follows: rubber-like vertebral pulp 2 tops are contacted coupling with upper bed-plate 1 bottom, vertebral pulp 2 bottoms are contacted coupling with lower bottom base 3 tops,, and the two ends of tubular peplos 4 are tied up on the outer wall with upper bed-plate 1 and lower bottom base 2 the described upper bed-plate that is folded 1, vertebral pulp 2 and lower bottom base 3 parcels with tubular peplos 4.This artificial intervertebral disc is embedded in the spinal column intervertebral space, and upper bed-plate 1 top contacts fusion with the upper soleplate of intervertebral space, and lower bottom base 3 contacts fusion with the next soleplate of intervertebral space, and the high side 5 in lower bottom base 3 outers is adjacent with spinal cord in the wings, and low flat side 6 is in vertebral body the place ahead.

Its operation principle: after this artificial intervertebral disc embeds the spinal column intervertebral space, upper bed-plate 1 is induced coating and the upper soleplate strong bonded of intervertebral space by the titanium silk and the bone of soleplate face, and lower bottom base 3 is induced coating and the next soleplate strong bonded of intervertebral space by the titanium silk and the bone of soleplate face; When flexion of vertebral column, upper bed-plate 1 elasticity of compression vertebral pulp, anterior big than the rear portion degree, because portion outer 6 is low flat in face of lower bottom base 3 vertebral pulps, so can occur sliding motion forward simultaneously.When stretching behind the spinal column, upper bed-plate elasticity of compression vertebral pulp, the more anterior degree in rear portion is big, because its outer, vertebral pulp face rear portion 5 high rising stop, upper bed-plate is resetted or is stopped at centre bit, not to the rear portion slippage.

Claims

1. an artificial intervertebral disk comprises upper bed-plate 1, lower bottom base 3 and tubular peplos 4, it is characterized in that: also comprise the elasticity vertebral pulp 2 between upper bed-plate and lower bottom base.

2. artificial intervertebral disk according to claim 1 is characterized in that: the end face one side height of lower bottom base, opposite side is low.

3. artificial intervertebral disk according to claim 1 is characterized in that: the mating surface of upper bed-plate, lower bottom base and vertebral pulp is the coarse particles face.