CN112451182A - XJ bionic artificial intervertebral joint - Google Patents

Abstract

Translated fromChinese

本发明公开了一种XJ仿生人工椎间关节，包括上位椎体、下位椎体、髓核，上位椎体与下位椎体呈上下对称设置，上位椎体与下位椎体的相对面设置有与髓核形状相吻合的第一凹槽，髓核嵌入所述上位椎体、下位椎体之间的第一凹槽内，使上位椎体与下位椎体之间实现全方位旋转运动；上位椎体、下位椎体的顶部、底部设置有上位嵌接部、下位嵌接部，上位嵌接部、下位嵌接部的顶面、底面均设置有向内凹陷的第二凹槽；上位椎体的前侧面分别设置有贯穿其后侧面设置有一对上位固定孔、一对下位固定孔，且上位固定孔、下位固定孔均向后交叉设置。本发明结构简单、成本低、灵活性高，有效防止术后假体错位，实现椎间关节全方位屈伸、侧偏和旋转运动。

The invention discloses an XJ bionic artificial intervertebral joint, which comprises an upper vertebral body, a lower vertebral body and a nucleus pulposus. The upper vertebral body and the lower vertebral body are arranged symmetrically up and down, and the opposite surfaces of the upper vertebral body and the lower vertebral body are provided with The first groove that matches the shape of the nucleus pulposus, the nucleus pulposus is embedded in the first groove between the upper vertebral body and the lower vertebral body, so that the omnidirectional rotation movement between the upper vertebral body and the lower vertebral body can be realized; The top and bottom of the body and the lower vertebral body are provided with an upper embedding part and a lower embedding part, and the top and bottom surfaces of the upper embedding part and the lower embedding part are provided with inwardly concave second grooves; A pair of upper fixing holes and a pair of lower fixing holes are respectively arranged through the rear side of the front side, and both the upper fixing holes and the lower fixing holes are arranged crosswise backward. The invention has the advantages of simple structure, low cost and high flexibility, effectively preventing the dislocation of the prosthesis after operation, and realizing the all-round flexion, extension, lateral deviation and rotation movement of the intervertebral joint.

Description

XJ bionic artificial intervertebral joint

Technical Field

The invention relates to the technical field of medical prosthesis, in particular to an XJ bionic artificial intervertebral joint.

Background

In recent years, the incidence of cervical spondylosis in China is increasing year by year and tends to be younger. According to statistics, the cervical vertebra ill population in China is hundreds of millions of people. The cervical motion is composed of a plurality of spinal motion units. Each spinal telemechanical unit is composed of two vertebral bodies and an intervertebral disc therebetween. The most complex and special part of the spine is subjected to head load, multi-directional movements of flexion, extension and rotation, and the most prone to strain and strain. The cervical intervertebral disc mainly comprises an upper end plate, a nucleus pulposus and a lower end plate, is a main connection mode between vertebral bodies, has the physiological functions of buffering and damping, maintaining the sequence of the vertebral bodies and increasing the mobility of the cervical vertebra, and is characterized in that under the condition that the zygapophysis joint is intact, the function of a single intervertebral joint is jointly completed by an upper vertebral body, a lower vertebral body and the intervertebral disc between the upper vertebral body and the lower vertebral body. Due to natural aging, neck pressure and stress, cervical intervertebral discs are damaged or degenerated, the cervical marrow or spinal nerve root is pressed due to the loss of the height of the intervertebral discs or the prolapse of the nucleus pulposus, a series of clinical symptoms such as neck pain, numbness or severe pain of unilateral upper limbs or hands, weakness of the upper limbs and the like are caused, and paraplegia can be caused for severe patients. Aiming at the treatment of cervical spondylosis, the artificial cervical intervertebral disc replacement is a new method for treating the cervical intervertebral disc diseases in recent years, the existing artificial cervical intervertebral disc prosthesis only replaces the pathological change or the degenerated cervical intervertebral disc singly, is limited to the replacement of the intervertebral disc and does not simulate the physiology and anatomy of a cervical intervertebral motion unit. The invention aims to provide a bionic artificial intervertebral motion unit to restore the physiological function of cervical vertebra.

Disclosure of Invention

The invention aims to provide an XJ bionic artificial intervertebral joint which is simple in structure and low in cost, greatly improves the post-operation stability and the fusion effect of vertebral bodies, and effectively solves the problems of cervical disc herniation, cervical spondylosis, cervical vertebra fracture and the like.

In order to realize the scheme, the embodiment of the invention provides an XJ bionic artificial intervertebral joint, which comprises an upper vertebral body, a lower vertebral body and a nucleus pulposus, wherein the upper vertebral body and the lower vertebral body are arranged in a vertically symmetrical manner, a first groove matched with the shape of the nucleus pulposus is arranged on the opposite surface of the upper vertebral body and the lower vertebral body, and the nucleus pulposus is embedded into the first groove between the upper vertebral body and the lower vertebral body so as to realize omnibearing rotary motion between the upper vertebral body and the lower vertebral body;

the top and the bottom of the upper vertebral body and the lower vertebral body are provided with an upper embedded part and a lower embedded part, and the top surfaces and the bottom surfaces of the upper embedded part and the lower embedded part are provided with second grooves which are sunken inwards;

the front side surface of the upper vertebral body is respectively provided with a pair of upper fixing holes and a pair of lower fixing holes which penetrate through the rear side surface of the upper vertebral body, and the upper fixing holes and the lower fixing holes are arranged in a backward crossing mode.

Preferably, an upper injection hole penetrating through the first groove is formed in the upper anterior side of the lower vertebral body, and a lower injection hole penetrating to the first groove is formed in the lower anterior side of the lower vertebral body.

Preferably, the nucleus pulposus comprises a core body, and the upper injection hole and the lower injection hole are respectively provided with an injection tube communicated with the core body, so that the core body can inject hydrogel into the core body through the injection tubes.

Preferably, the upper injection hole and the lower injection hole are opened at the front sides of the upper vertebral body and the lower vertebral body, and an upper embedded hole and a lower embedded hole are respectively arranged at the front sides of the upper vertebral body and the lower vertebral body.

Preferably, the upper embedded hole and the lower embedded hole are provided with an upper plugging head and a lower plugging head, so that the upper plugging head and the lower plugging head plug the upper injection hole and the lower injection hole respectively.

Preferably, the surfaces of the superior and inferior vertebral bodies are trabecular cancellous bone.

Preferably, the vertical sections of the superior vertebral body and the inferior vertebral body are frustum-shaped.

Preferably, the upper fixing hole and the lower fixing hole are respectively in threaded connection with an upper screw and a lower screw

The embodiment of the invention has the following beneficial effects:

the superior vertebral body and the inferior vertebral body are respectively connected with the nucleus pulposus by adopting natural silk fabrics, nylon, terylene, expanded Polytetrafluoroethylene (PTEE) tubes and polyethylene fibers, thereby improving the flexibility between the superior vertebral body and the inferior vertebral body and avoiding the dislocation of the nucleus pulposus.

Through excising osteophyte of human body vertebral body gap hyperplasia, an XJ bionic artificial intervertebral joint is implanted in the operation process, and hydrogel is injected into nucleus pulposus, so that an upper vertebral body and a lower vertebral body are respectively supported on a distal end plate of the excised vertebral body, and the omnibearing flexion, lateral deflection and rotation motions of the upper vertebral body and the lower vertebral body are realized.

And adopt 3D printing technology to make bionical artificial cervical intervertebral joint, effectively solve the problem such as the price is expensive, the size does not match, and the elasticity, density and the hole of 3D false body can simulate bone trabecula structure simultaneously, optimize false body structure.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a front view of the overall structure of the present invention;

FIG. 3 is a rear elevational view of the overall construction of the present invention;

FIG. 4 is an overall exploded view of the present invention;

FIG. 5 is a half sectional view of the overall structure of the present invention;

FIG. 6 is a partial view of the overall structure of the present invention;

fig. 7 is a schematic view showing a structure of a portion a in fig. 5.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the XJ bionic artificial intervertebral joint comprises an uppervertebral body 1, a lowervertebral body 2 and a nucleus pulposus 3.

Referring to fig. 1 and 4, the superiorvertebral body 1 and the inferiorvertebral body 2 are arranged up and down symmetrically, the opposite surface between the superiorvertebral body 1 and the inferiorvertebral body 2 is provided withfirst grooves 11, 21 which are matched with the shape of the nucleus pulposus 3, the first grooves are smooth surfaces, the nucleus pulposus 3 is embedded into thefirst grooves 11, 21 between the superiorvertebral body 1 and the inferiorvertebral body 2, so that the movement of the superiorvertebral body 1 and the inferiorvertebral body 2 is more flexible, and the nucleus pulposus 3 is connected with the superiorvertebral body 1 and the inferiorvertebral body 2 through materials such as natural silk fabrics, nylon, terylene, expanded Polytetrafluoroethylene (PTEE) tubes, polyethylene fibers or artificial blood vessels, compared with the traditional screw fixation or embedded installation, the connection mode adopted by the invention can not only effectively avoid the dislocation of the nucleus pulposus, meanwhile, the flexibility and the flexibility between the superior vertebral body and the inferior vertebral body are improved, and the stable connection between the superior vertebral body and the inferior vertebral body is ensured.

Referring to fig. 2, the vertical cross-sections of the superiorvertebral body 1 and the inferiorvertebral body 2 are in a frustum shape, and the superior vertebral body and the inferiorvertebral body 2 are vertically arranged to form a rhombus shape, so that the stress between the superiorvertebral body 1 and the inferiorvertebral body 2 is more stable, and the superior vertebral body and the inferiorvertebral body 2 are manufactured into an artificial vertebral body by adopting a titanium alloy material to perform a 3D printing technology, so that the superior vertebral body and the inferiorvertebral body 1 and 2 have the advantages of high toughness, corrosion resistance, strong load and the like.

The top ofsuperior centrum 1 is provided with superior scarfjoint portion 4, the bottom ofinferior centrum 2 is provided with inferior scarfjoint portion 5, the top surface of superior scarfjoint portion 4 and inferior scarfjoint portion 5, the bottom surface all is provided with second recess 41, 51, the bottom diameter of superiorscarf joint portion 4 is equivalent with the top diameter size ofsuperior centrum 1, the top diameter of superiorscarf joint portion 4 is greater than the top diameter ofsuperior centrum 1, the top diameter of inferior scarfjoint portion 5 is equivalent with the bottom diameter size ofinferior centrum 2, the bottom diameter of inferior scarfjoint portion 5 is greater than the bottom diameter ofinferior centrum 2.

Referring to fig. 2 and 5, the superiorvertebral body 1 has ansuperior injection hole 12 penetrating through thefirst groove 11 at the superior anterior side, the inferiorvertebral body 2 has ainferior injection hole 22 penetrating through thefirst groove 21 at the inferior anterior side, thenucleus pulposus 3 includes a core body 31, and injection tubes communicating with the core body 31 are respectively disposed in thesuperior injection hole 12 and theinferior injection hole 22.

Through carrying out wedge excision to human centrum, furthest excision is excised and is carried out human osteophyte, reserves the biggest bone volume as far as possible, implantssuperior vertebra 1, thenext centrum 2 in the human centrum, andsuperior scarf joint 4 ofsuperior vertebra 1 and thenext scarf joint 5 ofnext centrum 2 support respectively on the distal end plate of excision centrum to remain cervical vertebra joint activity degree.

Referring again to FIG. 7, the hydrogel is injected into the core 31 by a high pressure syringe, and the injection pressure is 50-70N during the injection process. The openings of theupper injection hole 12 and thelower injection hole 22 are positioned at the front sides of the uppervertebral body 1 and the lowervertebral body 2, respectively, an upperpre-buried hole 121 and an upperpre-buried hole 221 are arranged, the upperpre-buried hole 121 and the secondpre-buried hole 221 are provided with an upper blocking head and a lower blocking head, the upper blocking head and the lower blocking head preferably adopt screws, after the glue injection of the core body 31 is completed, the upper blocking head and the lower blocking head are respectively in threaded connection with the upperpre-buried hole 121 and the secondpre-buried hole 221, so that theupper injection hole 12 and thelower injection hole 22 are respectively blocked, the hydrogel in the core body 31 is prevented from flowing out, the intervertebral units between the uppervertebral body 1 and the lowervertebral body 2 can realize the omnibearing flexion, lateral deviation and rotation motion, and the flexibility and the strength of nucleus pulp.

Superior centrum 1, the surface ofinferior centrum 2 adopts porous tantalum metal's material, makesuperior centrum 1 and 2 surfaces of inferior centrum form porous bone trabecula, the preferred adoption 300 of the pore on porous tantalum metal surface adds 600 mu m,superior centrum 1,inferior centrum 2 respectively with the upper end plate of human body, after the lower end plate scarf joint, be favorable to the long pore of going into porous bone trabecula surface of human bone vertebra through the porous bone trabecula onsuperior centrum 1 and 2 surfaces of inferior centrum, make postoperativesuperior centrum 1, the fusion effect betweeninferior centrum 2 and the upper and lower human centrum is better.

Referring to fig. 2, 3 and 6, the front side surfaces of the superiorvertebral body 1 and the inferiorvertebral body 2 are respectively provided with a pair ofsuperior fixing holes 13 and a pair ofinferior fixing holes 23 through the back side surfaces thereof in an inclined manner, thesuperior fixing holes 13 and theinferior fixing holes 23 are both arranged in an inclined manner, the superior fixing blocks and the inferior fixing blocks of the superiorvertebral body 1 and the inferiorvertebral body 2 are respectively in threaded connection with superior screws and inferior screws, and the tail ends of the superior screws and the inferior screws respectively penetrate through the superiorvertebral body 1 and the inferiorvertebral body 2 to be fixedly connected with transverse processes at two sides of a human vertebral arch plate, so that dislocation of the superior vertebral body and the inferior vertebral body in the moving process after operation is greatly reduced, and the stability between the vertebral.

It should be understood that the above-mentioned embodiments are only illustrative of the technical concepts and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All modifications made according to the spirit of the main technical scheme of the invention are covered in the protection scope of the invention.

Claims (8)

Translated fromChinese

1.一种XJ仿生人工椎间关节，其特征在于，包括上位椎体、下位椎体、髓核，所述上位椎体与所述下位椎体呈上下对称设置，所述上位椎体与所述下位椎体的相对面设置有与所述髓核形状相吻合的第一凹槽，所述髓核嵌入所述上位椎体、下位椎体之间的第一凹槽内，使所述上位椎体与所述下位椎体之间实现全方位旋转运动；1. an XJ bionic artificial intervertebral joint, is characterized in that, comprises upper vertebral body, lower vertebral body, nucleus pulposus, described upper vertebral body and described lower vertebral body are symmetrically arranged up and down, and described upper vertebral body and all The opposite surface of the lower vertebral body is provided with a first groove that matches the shape of the nucleus pulposus, and the nucleus pulposus is embedded in the first groove between the upper vertebral body and the lower vertebral body, so that the upper vertebral body is formed. An omnidirectional rotational motion is realized between the vertebral body and the lower vertebral body;所述上位椎体、下位椎体的顶部、底部设置有上位嵌接部、下位嵌接部，所述上位嵌接部、下位嵌接部的顶面、底面均设置有向内凹陷的第二凹槽；The top and bottom of the upper vertebral body and the lower vertebral body are provided with upper and lower embedding parts, and the top and bottom surfaces of the upper and lower embedding parts are provided with inwardly concave second parts. groove;所述上位椎体的前侧面分别设置有贯穿其后侧面设置有一对上位固定孔、一对下位固定孔，所述上位固定孔、下位固定孔均向后交叉设置。The front side of the upper vertebral body is respectively provided with a pair of upper fixation holes and a pair of lower fixation holes through the rear side thereof, and the upper fixation holes and the lower fixation holes are arranged in a rearward cross.2.根据权利要求1所述的一种XJ仿生人工椎间关节，其特征在于，所述上位椎体的上部前侧设置有贯穿其所述第一凹槽的上位注射孔，所述下位椎体的下部前侧设置有贯通至其所述第一凹槽的下位注射孔。2 . The XJ bionic artificial intervertebral joint according to claim 1 , wherein the upper front side of the upper vertebral body is provided with an upper injection hole penetrating the first groove thereof, and the lower vertebral body is provided with an upper injection hole penetrating through the first groove. The lower front side of the body is provided with a lower injection hole penetrating to the first groove thereof.3.根据权利要求2所述的一种XJ仿生人工椎间关节，其特征在于，所述髓核包括芯体，所述上位注射孔与所述下位注射孔分别设置有与所述芯体连通的注射管，使所述芯体通过注射管向其内部注射水凝胶。3 . An XJ bionic artificial intervertebral joint according to claim 2 , wherein the nucleus pulposus comprises a core body, and the upper injection hole and the lower injection hole are respectively provided with a connection with the core body. 4 . The core is injected with hydrogel through the injection tube.4.根据权利要求3所述的一种XJ仿生人工椎间关节，其特征在于，所述上位注射孔、下位注射孔开口于所述上位椎体、下位椎体的前侧分别设置有第一预埋孔、第二预埋孔。4 . The XJ bionic artificial intervertebral joint according to claim 3 , wherein the upper injection hole and the lower injection hole are respectively provided with a first vertebral body on the front side of the upper and lower vertebral bodies. Pre-buried hole, second pre-buried hole.5.根据权利要求4所述的一种XJ仿生人工椎间关节，其特征在于，所述第一、第二预埋孔设置有上位封堵头、下位封堵头，使其分别堵住所述上位注射孔、下位注射孔。5. A kind of XJ bionic artificial intervertebral joint according to claim 4, characterized in that, the first and second pre-buried holes are provided with an upper-position plugging head and a lower-position plugging head, so as to block the positions respectively. The upper injection hole and the lower injection hole.6.根据权利要求1－5任一项所述的一种XJ仿生人工椎间关节，其特征在于，所述上位椎体、下位椎体的表面为多孔骨小梁。6 . The XJ bionic artificial intervertebral joint according to claim 1 , wherein the surfaces of the upper vertebral body and the lower vertebral body are porous trabecular bone. 7 .7.根据权利要求6所述的一种XJ仿生人工椎间关节，其特征在于，所述上位椎体、下位椎体的竖截面呈锥台状。7 . The XJ bionic artificial intervertebral joint according to claim 6 , wherein the vertical cross-sections of the upper vertebral body and the lower vertebral body are truncated cones. 8 .8.根据权利要求1所述的一种XJ仿生人工椎间关节，其特征在于，所述上位固定孔和下位固定孔上分别螺纹连接有上位螺钉、下位螺钉。8 . The XJ bionic artificial intervertebral joint according to claim 1 , wherein the upper fixing hole and the lower fixing hole are respectively screwed with upper screw and lower screw. 9 .

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