WO2021100953A1

WO2021100953A1 - Expandable intervertebral fusion cage

Info

Publication number: WO2021100953A1
Application number: PCT/KR2019/016524
Authority: WO
Inventors: 이성수
Original assignee: 이성수
Priority date: 2019-11-22
Filing date: 2019-11-28
Publication date: 2021-05-27
Also published as: KR20210062904A

Abstract

The present invention relates to an expandable intervertebral fusion cage, and more particularly, to an expandable intervertebral fusion cage, wherein an upper support body is moved up and a lower support body is moved down by a sliding member which slides as a bolt member positioned inside a central body rotates, to stably support neighboring vertebral bodies.

Description

Expandable intervertebral fusion prosthesis

The present invention relates to an expandable intervertebral fusion prosthesis, and more specifically, as the bolt member located inside the central body is rotated, the upper support is moved upward by the sliding member that slides, and the lower support is By moving in a downward direction, it relates to an expandable intervertebral fusion prosthesis capable of stably supporting neighboring vertebral bodies.

In general, the spine is usually made up of 24 bones (excluding sacral vertebrae), which are connected by joint nodes, and between each joint, each time the human body moves or the joint operates, it absorbs the corresponding shock and loads it. There is a disk to support it.

By this configuration, the spine not only supports the human posture while buffering, it serves as the basis for movement and plays an important function to protect all internal organs.

However, as the spine sustains an external artificial factor, degenerative, or abnormal posture for a long time, when the spine is damaged or twisted, severe pain is caused by compressing the nerve passing through the spinal canal.

That is, a patient with a part of the spine injured cannot perform activities necessary for personal life, and even if the degree of damage is not severe, the damaged part of the spine is pressed or touched by other adjacent parts, causing pain.

As one of the surgical treatment methods for such spinal diseases, the intervertebral fusion prosthesis used for fusion is between the upper and lower vertebrae after removing the damaged disk to aid in vertebrae graft of the lumbar spine or fixation of vertebral dislocation and curvature. As an implant to be treated, it is used for the purpose of treating structural abnormalities such as the degenerative intervertebral disc protrusion layer, grafting bones of the spine, fixing vertebral dislocation and curvature, repairing anteriorly displaced vertebral body, and recovering the height of a fractured vertebral body.

As an example of such a conventional intervertebral fusion prosthesis, Korean Patent No. 10-0881592 discloses a "intervertebral fixed prosthesis". The conventional intervertebral fusion prosthesis has a pointed cross-sectional shape having a locking part at the top and bottom of the body. By forming an anchor part of the vertebrae, the prosthesis material fixed between the vertebrae does not slip or fall off.

However, since the size and shape of the conventional intervertebral fusion prosthesis are fixed, the incision of the person to be treated must be incised so as to correspond to the size of the intervertebral fusion prosthesis.There is a problem in that the incision of the person to be treated cannot be minimized.

In addition, the conventional intervertebral fusion prosthesis has a slight difference in the spacing between neighboring vertebral bodies for each person to be treated, and thus there is a problem in that the neighboring vertebral bodies cannot be firmly fixed.

The present invention was conceived to solve this problem, and an object of the present invention is that as the bolt member located inside the central body is rotated, the upper support is moved in the upper direction by the sliding member that is slid. Is to provide an expandable intervertebral fusion prosthesis capable of stably and firmly supporting the neighboring vertebral bodies by being moved in the downward direction, which is variable to correspond to the distance between neighboring vertebral bodies, even if the intervals between neighboring vertebral bodies are different.

In addition, another object of the present invention is to be inserted in a reduced size when inserted between neighboring vertebral bodies of the patient to be treated, and to be expanded to correspond to the distance between neighboring vertebral bodies while being located between neighboring vertebral bodies, so that minimally invasive surgery It is to provide an expandable intervertebral fusion prosthesis suitable for.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the present invention has a block shape provided with a predetermined thickness, a first through hole penetrating in the vertical direction is formed, and a central portion in which a second through hole communicating with the first through hole is formed at a central portion of one side. Body; An upper support body including an upper plate supporting an upper vertebral body among neighboring vertebral bodies and a first recess integrally extending downward from the upper plate and fitted into the first through hole of the central body; A lower support body including a lower plate supporting an upper vertebral body among neighboring vertebral bodies and a second recess integrally extending upward from the lower plate and fitted into the first through hole of the central body; A bolt member inserted through the second through hole and positioned inside the central body, a screw thread formed in the central portion, and rotatably provided at a fixed position; And a sliding member positioned between the upper support body and the lower support body and having a fastening hole formed at a central portion thereof to be fastened to the bolt member, wherein the sliding member includes, when the bolt member is rotated forward, the sliding member An expandable intervertebral fusion prosthesis, characterized in that moving from one side to the other, pushing the upper support and the lower support, so that the upper support is moved upward, and the lower support is moved downward. Provides.

In a preferred embodiment, the first concave portion is provided with a first groove that is inclined from a central portion of the lower surface to one side upward, and the second concave portion is inclined from a central portion of the upper surface to one downward direction. An excitation second groove portion is provided, and the sliding member includes a bar-shaped first sliding body portion formed in a shape corresponding to the first groove portion and a bar-shaped second sliding body portion formed in a shape corresponding to the second groove portion. Including.

In a preferred embodiment, the bolt member is provided with a belt-shaped groove on one side and a groove on the other side, respectively, formed by being dug to a predetermined depth along an outer circumferential surface on one side and the other side, and the central body is orthogonal to the central axis of the second through hole at one side. A first pinhole formed to communicate with the second through hole, and a second pinhole formed in a direction orthogonal to a central axis of the second through hole on the other side, and in the first pinhole and the second pinhole A pin member that is fitted and installed, respectively, wherein the pin members are respectively hung on one side groove of the bolt member and the other side groove of the bolt member, and the bolt member while the position of the bolt member is fixed to the central body. Makes it possible to rotate.

In a preferred embodiment, a first guide recess integrally extending in an upper direction is formed at an upper portion of the central portion of the central body, and a second guide recess integrally extending in a lower direction is formed at a lower portion of the central portion of the central body, The upper plate has a first guide groove through which the first guide recess can be fitted, and the lower plate has a second guide groove through which the second guide recess can be fitted.

The present invention has the following excellent effects.

First, according to the expandable intervertebral fusion prosthesis of the present invention, as the bolt member located inside the central body rotates forward, the upper support is moved upward by a sliding member that slides from one side to the other, Since the lower support is moved in a downward direction, even if the distance between neighboring vertebral bodies is different, it is variable to correspond to the distance between neighboring vertebral bodies, thereby stably and firmly supporting the neighboring vertebral bodies.

In addition, according to the expandable intervertebral fusion prosthesis of the present invention, when inserted between the adjacent vertebral bodies of the person to be treated, the size is reduced and can be expanded at a position between neighboring vertebral bodies, thereby minimizing the incision site. Since it can be used as an invasive surgery, it has the advantage of reducing bleeding, postoperative pain, and infection.

1 is a perspective view for explaining an expandable intervertebral fusion prosthesis according to an embodiment of the present invention.

2 is an exploded perspective view for explaining an expandable intervertebral fusion prosthesis according to an embodiment of the present invention.

3 is a view for explaining the bolt member of the extended intervertebral fusion prosthesis according to an embodiment of the present invention.

4 is a view for explaining an expansion driving mechanism of the expandable intervertebral fusion prosthesis according to an embodiment of the present invention.

110: central body 111: first guide recess

112: second guide recess 110a: first through hole

110b: second through hole 110c: third through hole

120: upper support 120a: through hole

121: upper plate 121a: uneven

121b: first guide groove 122: first concave

122a: first groove 130: lower support

130a: through hole 131: lower plate

131a: uneven 131b: second guide groove

132: second recess 132a: second groove

140: bolt member 140a: one side groove

140b: other side groove 141: thread

150: sliding member 150a: fastening hole

160: pin member

As for terms used in the present invention, general terms that are currently widely used are selected, but in certain cases, some terms are arbitrarily selected by the applicant. In this case, the meanings described or used in the detailed description of the invention are considered rather than the names of simple terms. Therefore, the meaning should be grasped.

Hereinafter, the technical configuration of the present invention will be described in detail with reference to preferred embodiments shown in the accompanying drawings.

However, the present invention is not limited to the embodiments described herein and may be embodied in other forms. The same reference numerals denote the same elements throughout the specification.

1 is a perspective view for explaining the expandable intervertebral fusion prosthesis according to the present invention, Figure 2 is an exploded perspective view for explaining the expandable intervertebral fusion prosthesis according to the present invention.

1 and 2, the expandable intervertebral fusion prosthesis according to an embodiment of the present invention extends vertically while being inserted between neighboring vertebral bodies, so as to stably and firmly support neighboring vertebral bodies. As a treatment apparatus, it comprises a central body 110, an upper support 120, a lower support 130, a bolt member 140, and a sliding member 150.

The central body 110 is a support body on which the upper support body 110, the bolt member 140, and the sliding member 150 are supported, and is provided in a block formation having a predetermined thickness.

In addition, the central body 110 has a first through hole 110a penetrating in the vertical direction, a second through hole 110b formed in one central portion and communicating with the first through hole 110a, and the other central portion Is formed, the third through-hole 110c communicating with the first through-hole 110a is formed, respectively.

In addition, the central body 110 may be made of titanium, titanium alloy, or PEEK (Polyetheretherketone).

The upper support body 120 is a support body that supports an upper vertebral body among neighboring vertebral bodies, and includes an upper plate 121 and a first recess 122.

Here, a plurality of irregularities 121a may be integrally extended on the upper surface of the upper plate 121, which is to increase a fixed coupling force with the lower surface of the upper vertebral body by the irregularities 121a. .

In addition, the first concave portion 122 is formed integrally extending downward from the lower surface of the upper plate 121 and is fitted into the first through hole 120a of the central body 110.

In addition, the upper support 120 may be made of titanium, titanium alloy, or PEEK (Polyetheretherketone), and a through hole 120a having a predetermined shape penetrating in the vertical direction may be formed in the central portion of the upper support 120. have.

The lower support 130 is a support for supporting a lower vertebral body among neighboring vertebral bodies, and includes a lower plate 131 and a second recess 132.

Here, a plurality of irregularities 131a may be integrally extended on the lower surface of the lower plate 131, and these irregularities 131a function to increase a fixed coupling force with the upper surface of the lower vertebral body. .

In addition, the second concave portion 132 is formed integrally extending upward from the upper surface of the lower plate 132 and is fitted into the first through hole 120a of the central body 110.

In addition, the lower plate 130, like the upper plate 120, may be made of titanium, titanium alloy, or PEEK (polyetheretherketone) material, and a predetermined shape penetrating in the vertical direction at the center of the lower support 130 The through hole 130a of is formed.

That is, the lower supporter 130 is provided in a shape symmetrical to each other with the upper supporter 120.

Referring to FIG. 3, the bolt member 140 is a fastening member having a screw thread 141 formed in the central portion, and is inserted through the second through hole 110b of the central body 110, and the third through hole 110c It is located inside the central body 110 so that the other side is exposed through ).

In addition, the bolt member 140 is provided to be rotatable while the position inside the central body 110 is fixed.

For example, the expandable intervertebral fusion prosthesis 100 according to the present invention further includes a pin member 160, and the bolt member 140 is formed by the pin member 160 to the central body 110 It may be provided so as to be rotatable, while the position of the inside is fixed.

In more detail, the bolt member 140 is provided with a strip-shaped one side groove 140a formed by being dug along the outer circumferential surface to a predetermined depth on one side, and the other side of the strip-shaped groove formed by being dug to a predetermined depth along the outer circumferential surface on the other side ( 140b) is provided.

In addition, a first pinhole h1 is formed in the central body 110 at a position corresponding to the groove 140 on one side of the bolt member, and a second pinhole h1 is formed at a position corresponding to the groove 150 on the other side of the bolt member. (h2) is formed.

In other words, the first pinhole (h1) is formed in a direction orthogonal to the central axis of the second through hole (110b) at one side of the central body 110, the second pinhole (h2) is the central portion On the other side of the body 110, it is formed in a direction parallel to the central axis of the second pinhole h2.

In addition, the pin member 160 is fitted through the first pinhole (h1) and the second pinhole (h2), and is caught in the one side groove (140a) and the other side groove (140b) of the bolt member 160, respectively. It is installed so as to be.

That is, the pin members 160 are respectively caught in one side groove 140a and the other side groove 140b of the bolt member 140, so that the position of the bolt member 140 is inside the central body 110. While being fixed, the bolt member 140 is to be rotatable.

In addition, the bolt member 140 may be made of titanium, a titanium alloy, or PEEK (Polyetheretherketone).

In addition, the bolt member 140 may be formed with a plurality of holes so that a filler can be easily injected into the intervertebral fusion prosthesis through one side of the bolt member 140.

For example, the bolt member 140 is formed in a direction orthogonal to the central axis of the bolt member 140, the first hole 140c1 and the second hole 140c2 spaced apart from each other by a predetermined distance, the bolt member A third hole 140c2 allowing the first hole 140c1 and the second hole 140c2 to communicate with each other in a direction parallel to the central axis of 140 and a central portion of one side of the bolt member 140 A fourth hole 140c4 communicating with the first hole 140a may be provided.

Accordingly, a filler can be easily injected into the inside of the bolt member 140 through the fourth hole 140c4 formed at one side of the bolt member 140, and the injected filler is the first hole 140c1 ), the third hole 140c3 and the second hole 130c2 are sequentially spread out, and since the other end of the bolt member 140 is closed, the filler is prevented from leaking to the outside.

The sliding member 150 has a fastening hole 150a formed in the central portion, is fastened to the bolt member 140, and moves in a lateral direction as the bolt member 140 is rotated, and the upper support body 120 And the lower support 130 serves to transmit power so that it expands in the vertical direction.

For example, the sliding member 150 has a bar shape, a first sliding body portion 151 having a rhombus shape inclined upward in a cross-sectional shape, and a lower surface of the first sliding body portion 151. It is formed to extend integrally, and comprises a second sliding body portion 152 having a shape that is symmetrical in the vertical direction with the first sliding body portion 151.

In addition, the first concave portion 122 of the upper support body 120 is dug in a shape inclined from the central portion of the lower surface to the upper one side, and has a shape corresponding to the first sliding body portion 151 (122a). ) Is provided, and the second concave portion 132 of the lower support 130 is dug in an inclined form from the central portion of the upper surface to one lower direction, and has a shape corresponding to the second sliding body portion 152. A groove portion 132a is provided.

This is to allow the upper support 120 and the lower support 130 to be easily extended and driven in the vertical direction by the sliding member 150, and a detailed description thereof will be described later.

In addition, the expandable intervertebral fusion prosthesis 100 according to the present invention is a sliding member that allows the sliding member 150 to be easily fitted into the central body 110 at a predetermined position of the central body 110 A member inlet hole may be formed, and the sliding member inlet hole may be provided in a shape corresponding to the cross-sectional shape of the sliding member 150.

In addition, a first guide recess 111 integrally extended in an upper direction is provided at an upper portion of the central portion of the central body 110, and a second guide recessed portion 111 integrally extended in a lower direction is provided at a lower portion of the central portion of the central body 110. The guide recess 112 may be provided.

In this case, the upper plate 121 is provided with a first guide groove portion 121b into which the first guide recessed portion 111 can be fitted, and the lower plate 131 has the second guide recessed portion 112 A second guide groove 131b that can be fitted is formed.

This serves to stably guide the upper support 120 and the lower support 130 to be extended and moved in the vertical direction, respectively.

Referring to FIG. 4, when the bolt member 140 is rotated forward, the sliding member 150 moves from one side to the other side along the thread of the bolt member 140.

At this time, the sliding member 150 is the sliding member 150 is separated from the first groove (122a) and the second groove (132a), the upper support 120 is pushed up in the upper direction, the The lower lower support 130 is pushed downward.

In other words, when the bolt member 140 is rotated forward, the sliding member 150 moves from one side to the other, so that the upper support body 120 and the lower support body 130 are moved. By pushing, the upper support 120 is moved in an upper direction, and the lower support 130 is moved in a lower direction.

Conversely, when the bolt member 140 rotates in the reverse direction, the sliding member 150 moves from the other side in one direction, so that the gap between the upper support body 120 and the lower support body 130 is narrowed. It is driven to reduce the total removal in the form of paper.

As described above, in the extended intervertebral fusion prosthesis according to the present invention, as the bolt member rotates forward, the upper support is moved in the upper direction by the sliding member that slides from one side to the other. Since it can be driven in a movable extension type, even if the distance between neighboring vertebral bodies is different, it is variable to correspond to the distance between neighboring vertebral bodies and has the advantage of stably supporting the neighboring vertebral bodies.

Furthermore, when inserted between neighboring vertebral bodies of the person to be treated, the size is reduced and can be expanded at a location between neighboring vertebral bodies, so it can be used as a minimally invasive surgery to minimize the incision, so bleeding and surgery It has the advantage of reducing post-pain and infection.

As described above, the present invention has been illustrated and described with reference to preferred embodiments, but is not limited to the above-described embodiments, and within the scope of the spirit of the present invention, those of ordinary skill in the art to which the present invention pertains. Various changes and modifications will be possible.

Claims

A central body having a block shape provided with a predetermined thickness and having a first through hole penetrating in the vertical direction, and having a second through hole communicating with the first through hole at a central portion of one side thereof;

An upper support body including an upper plate supporting an upper vertebral body among neighboring vertebral bodies and a first recess integrally extending downward from the upper plate and fitted into the first through hole of the central body;

A lower support body including a lower plate supporting an upper vertebral body among neighboring vertebral bodies and a second recess integrally extending upward from the lower plate and fitted into the first through hole of the central body;

A bolt member inserted through the second through hole and positioned inside the central body, a screw thread formed in the central portion, and rotatably provided at a fixed position; And

Including; a sliding member positioned between the upper support and the lower support, a fastening hole is formed in the central portion and fastened to the bolt member,

When the bolt member is rotated forward, the sliding member moves from one side to the other, pushing the upper support and the lower support, so that the upper support moves upward, and the lower support Expandable intervertebral fusion prosthesis, characterized in that to move in the lower direction.
The method of claim 1,

The first concave portion is provided with a first groove inclined from the central portion of the lower surface to one side upward, and the second concave portion is provided with a second groove that is inclined from the central portion of the upper surface in a downward direction And

The sliding member includes a bar-shaped first sliding body portion formed in a shape corresponding to the first groove portion and a bar-shaped second sliding body portion formed in a shape corresponding to the second groove portion. Intervertebral fusion prosthesis.
The method of claim 1,

The bolt member is provided with a belt-shaped one side groove and the other side groove respectively formed by being dug to a predetermined depth along the outer circumferential surface on one side and the other side,

The central body has a first pinhole formed to communicate with the second through hole in a direction orthogonal to the central axis of the second through hole on one side, and a second pinhole formed on the other side in a direction orthogonal to the central axis of the second through hole. A pinhole is formed,

The first pinhole and the pin member fitted to each of the second pinhole and installed; further includes,

The pin members are respectively hooked on one side groove of the bolt member and the other side groove of the bolt member, so that the bolt member is rotatable while the position of the bolt member is fixed to the central body. Fusion prosthesis.
The method of claim 1,

A first guide recess integrally extending in an upward direction is formed at an upper central portion of the central body, and a second guide recess integrally extending in a lower direction is formed at a lower central portion of the central body,

The upper plate is an expandable intervertebral body, characterized in that a first guide groove is formed into which the first guide concave part is inserted, and the lower plate is formed with a second guide groove through which the second guide concave part is inserted. Fusion prosthesis.