KR102364016B1 - An intervertebral fusion prosthesis that is self-supporting and has a clip to prevent the screw from coming off - Google Patents

Abstract

One embodiment of the present invention provides a technique to prevent the separation of a screw used to fix a prosthesis inserted between vertebral bodies so that the prosthesis can be stably fixed even when a patient moves in various ways. A self-supported intervertebral fusion prosthesis with a clip for preventing the separation of a screw, according to one embodiment of the present invention, comprises: a main body inserted between vertebral bodies of the cervical vertebral and the vertebral column, and including a cavity penetrating from top to bottom, a screw hole, a hole formed in the direction of the cavity, and a main body groove formed along both sides and rear surface thereof; a screw coupled to the screw hole while rotating in one direction and inserted and fixed to the cervical vertebral and the vertebral column; and a clip inserted into the main body groove and coupled to the main body and including a stopping clip protrusion protruding through the screw hole.

Description

{AN INTERVERTEBRAL FUSION PROSTHESIS THAT IS SELF-SUPPORTING AND HAS A CLIP TO PREVENT THE SCREW FROM COMING OFF}

The present invention relates to a self-supporting intervertebral body fusion prosthesis having a clip for preventing screw separation, and more particularly, in order to stably fix the prosthesis inserted between the vertebrae even in various movements of the patient, the screw for fixing the prosthesis material It's about technology to prevent breakouts.

In general, in orthopedic surgery or neurosurgery, for the treatment of cervical or spinal disc disease, disc, myelopathy, fracture, etc. Surgery is performed to insert an artificial prosthetic material that restores and maintains the gap between the intervertebral discs.

In the above operation, the back of the human body is incised and bone graft is performed in the disc space removed to the rear of the cervical or vertebrae, and then the above-mentioned prosthetic material is inserted to induce intervertebral osseointegration.

However, since there is a risk that the prosthetic material moves in the intervertebral space under the influence of the stress applied when the patient moves, a means for preventing the movement of the prosthetic material in the intervertebral space or between the cervical vertebrae or the vertebrae is required while preventing the movement of the prosthetic material.

In Korean Patent Registration No. 10-1041387 (Title of the Invention: Intervertebral Interbody Fusion Cage and its Set), it is inserted between adjacent vertebral bodies and used for vertebral body fusion, and the maximum length of the horizontal width between the left and right sides of the cage is a cage formed to be equal to or smaller than the maximum length of the longitudinal width between the front and rear surfaces of the vertebral bodies in the direction of entry; a plate coupled to the cage and fixed to the vertebral body; An intervertebral body fusion cage set including a screw for a plate used to fix the plate to the vertebral body is disclosed.

Republic of Korea Patent No. 10-1041387

An object of the present invention to solve the above problems is to prevent the disengagement of the screw for fixing the prosthesis, so that the prosthesis inserted between the vertebrae can be stably fixed even in various movements of the patient.

The technical problems to be achieved by the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned can be clearly understood by those of ordinary skill in the art to which the present invention belongs from the description below. There will be.

The configuration of the present invention for achieving the above object is a cavity that is inserted between the cervical vertebrae or vertebrae of the vertebrae and penetrates from the upper surface to the lower surface, a screw hole which is a hole formed in the direction of the cavity from the front surface, and both sides and a main body having a main body groove which is a groove formed along a rear surface; a screw which is screw-coupled to the screw hole while rotating in one direction, and is inserted into and fixed to the cervical vertebrae or vertebrae; and a clip inserted into the main body groove and coupled to the main body, and having a clip protrusion for blocking that protrudes into the screw hole; The blocking clip protrusion is characterized in that it presses the head of the screw to prevent the disengagement of the screw.

In an embodiment of the present invention, the clip may further include a fixing clip protrusion formed at the other end of the clip, which is a position corresponding to one end of the clip on which the jersey clip protrusion is formed.

In an embodiment of the present invention, with respect to the insertion direction between the vertebrae of the main body, the front surface of the clip protrusion for stopping is formed to be inclined, and the rear surface of the protrusion for blocking the clip may be formed vertically.

In an embodiment of the present invention, a plurality of clips may be formed, and one clip and another adjacent clip may be coupled to the main body in a symmetrical manner.

In an embodiment of the present invention, the central axis of the screw may be inclined with respect to the insertion direction between the vertebrae of the body.

In an embodiment of the present invention, a plurality of screws are formed, and the central axis of one screw and the central axis of the other screw may be inclined in different directions.

In an embodiment of the present invention, the main body may further include a main body protrusion, which is a protrusion formed on an upper surface or a lower surface of the main body.

In an embodiment of the present invention, the rear surface of the main body may have a curved surface.

In an embodiment of the present invention, the body may be formed of polyether ether ketone (PEEK) or a titanium (Ti) alloy.

In an embodiment of the present invention, the main body may further include a connection portion connected to the rod for insertion.

The effect of the present invention according to the above configuration is that the clip is coupled to the body of the prosthesis, and the screw is prevented from dislodging by the protrusion formed on the clip, so that the position of the prosthesis is easily maintained even in various movements of the patient. The efficiency of intervertebral bone formation using the

It should be understood that the effects of the present invention are not limited to the above-described effects, and include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a perspective view of a prosthetic material according to an embodiment of the present invention.
2 is a plan view of a shape retaining material according to an embodiment of the present invention.
3 is a front view of a shape retaining material according to an embodiment of the present invention.
4 is a side view of a shape retaining material according to an embodiment of the present invention.
5 is an exploded perspective view of a prosthetic material according to an embodiment of the present invention.
6 is an enlarged view of a portion of a prosthetic material according to an embodiment of the present invention.

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be embodied in several different forms, and thus is not limited to the embodiments described herein. And in order to clearly explain the present invention in the drawings, parts irrelevant to the description are omitted, and similar reference numerals are attached to similar parts throughout the specification.

Throughout the specification, when a part is said to be “connected (connected, contacted, coupled)” with another part, it is not only “directly connected” but also “indirectly connected” with another member interposed therebetween. "Including cases where In addition, when a part "includes" a certain component, this means that other components may be further provided without excluding other components unless otherwise stated.

The terms used herein are used only to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present specification, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view of a prosthetic material according to an embodiment of the present invention, FIG. 2 is a plan view of the prosthetic material according to an embodiment of the present invention, and FIG. 3 is a front view of the prosthetic material according to an embodiment of the present invention.

And, Figure 4 is a side view of the prosthetic material according to an embodiment of the present invention, Figure 5 is an exploded perspective view of the prosthetic material according to an embodiment of the present invention, Figure 6 is a portion of the prosthetic material according to an embodiment of the present invention is an enlarged view of 5 , the screw 300 is omitted.

Here, in FIGS. 1 to 4 , a state in which the screw 300 is coupled to the main body 200 is shown. Also, in FIG. 1 , the direction from the front to the rear is the insertion direction between the vertebrae of the main body 200 .

As shown in FIG. 3 , the surface on which the entrance of the screw hole 210 is formed in the main body 200 is the front surface of the main body 200 , and the curved surface corresponding to this is the rear surface. In addition, the surface shown in FIG. 2 is an upper surface. In addition, the remaining rear surface, left surface, and right surface may be formed based on the aforementioned front surface, rear surface, and upper surface.

The matters regarding each direction (up, down, front, back, left and right) with respect to the main body 200 as described above may be applied to other configurations other than the main body 200 .

1 to 6, the prosthetic material of the present invention is inserted between the cervical vertebrae or the vertebrae of the vertebrae, and is a cavity penetrating from the upper surface to the lower surface, a screw hole 210, which is a hole formed in the direction of the cavity from the front; and a main body 200 having a main body groove 220 that is a groove formed along side and rear surfaces; The screw 300 is coupled to the screw hole 210 while rotating in one direction, and is inserted and fixed in the cervical vertebrae or vertebrae; And it is inserted into the main body groove 220, coupled to the main body 200, the clip 100 having a clip protrusion 110 for blocking protruding into the screw hole 210; includes.

And, when the screw 300 rotates in the other direction after the screw hole 210 and the screw 300 are combined, the clip protrusion 110 for blocking presses the head 310 of the screw to separate the screw 300 . can prevent

Specifically, before the screw 300 is coupled to the screw hole 210 , the clip 100 may be coupled to the body groove 220 . In addition, when the screw 300 rotates in one direction and passes through the screw hole 210 in the direction to be coupled with the screw hole 210, the screw head 310 pushes the front of the clip projection 110 for blocking. The clip protrusion 110 may pass through the blocking clip protrusion 110 while being spaced apart from the central axis of the screw hole 210 .

And, when the head 310 of the screw passes through the clip projection 110 for blocking, the projection projection 110 for the clip returns to the initial position by the elasticity of the clip 100, and the projection projection 110 for the clip By performing a locking function on the screw 300, even if the screw 300 rotates in the other direction and moves in a direction away from the screw hole 210, the clip projection 110 for blocking is the head 310 of the screw. By suppressing the pressure, it is possible to prevent separation of the screw 300 .

In order to separate the screw 300 from the screw hole 210 of the main body 200, the clip projection 110 for blocking is moved in a direction spaced apart from the central axis of the screw hole 210, and then the screw 300 is removed. By rotating in the other direction, the screw 300 may be moved in a direction separated from the screw hole 210 .

As described above, the clip 100 is coupled to the main body 200, and the disengagement of the screw 300 is prevented by the jersey clip protrusion 110 formed on the clip 100, so that even in various movements of the patient, the present invention Since the position of the prosthesis is easily maintained, the efficiency of intervertebral bone formation using the prosthesis of the present invention can be increased.

The rear surface of the body 200 may have a curved surface. Accordingly, when the intervertebral body 200 is inserted, it is inserted from the curved surface, so that the insertion of the body 200 can be easily performed. In addition, both sides of the left side and the right side of the body 200 may be provided with a flat surface. The clip body 130, which is the body of the clip 100, may be formed in a shape corresponding to the shape of the body groove 220 formed along both sides and rear surfaces of the main body 200 as described above.

That is, the clip body 130 may also be formed in a U-shaped shape to correspond to the shape of the main body groove 220 formed as described above and having a U-shaped shape. And, the clip 100 may further include a fixing clip protrusion 120 formed at the other end of the clip 100, which is a position corresponding to one end of the clip 100 on which the jersey clip protrusion 110 is formed. there is.

The jersey clip projection 110 is coupled to one side of the front portion 201 of the main body, and the fixing clip projection 120 is the front portion 201 of the main body at a position corresponding to one side of the front portion 201 of the body, on the other side of the front portion 201 . can be combined.

For the above configuration, on one side of the front portion 201 of the main body, a groove for blocking 230, which is a groove for fixing after the clip projection 110 for blocking is drawn in, is formed, and on the other side of the front portion 201 of the body for fixing A fixing groove 240 that is a fixed groove after the clip protrusion 120 is inserted may be formed.

Specifically, the screw hole 210 passing through the front portion 201 of the main body is connected to the cavity 250 and is connected to the body hole 212, which is a hole through which the body of the screw passes, and the body hole 212, and A head hole 211 which is a hole formed in the front of the body hole 212 may be provided. Here, when the screw 300 and the bone are coupled, the screw 300 may sequentially pass through the head hole 211 and the body hole 212 .

Here, at the connection portion between the head hole 211 and the body hole 212 , the diameter of the head hole 211 may be greater than the diameter of the body hole 212 . Accordingly, in the screw 300 , the body of the screw having a relatively small diameter may be seated in the body hole, and the head of the screw may be seated in the head hole. Due to the difference in diameter between the head hole 211 and the body hole 212, when the screw body 320 is coupled to the bone, the screw head 310 presses the variable diameter portion of the screw hole 210 formed as described above. Thus, the body 200 can be stably fixed between the vertebrae.

Then, a groove is formed from one side of the body 200 to the head hole 211 to form a blocking groove 230, and a groove is formed from the other side of the body 200 to the head hole 211 to form a fixing groove ( 240) may be formed.

As shown in FIG. 5 , the clip body 130 at one end of the clip protrusion 110 protrudes in a direction introduced into the block groove 230 when the main body 200 and the clip 100 are coupled. . In addition, the clip body 130 at the other end of the fixing clip protrusion 120 may be formed to protrude in a direction introduced into the fixing groove 240 when the main body 200 and the clip 100 are coupled.

Here, the protrusion length of the clip protrusion 110 for blocking may be formed to be longer than the protrusion length of the clip protrusion 120 for fixing, and accordingly, when the clip 100 is inserted into the body groove 220, the jersey The length of the clip protrusion 110 protruding in the direction of the screw hole 210 through the stopper groove 230 is the length of the clip protrusion 120 passing through the fixing groove 240 in the screw hole 210 direction. It may be formed to be longer than the protruding length.

Accordingly, when the screw 300 moves in a direction coupled to the screw hole 210 or moves in a direction separated from the screw hole 210 , the clip protrusion 110 for stopping is in contact with the head 310 of the screw. On the other hand, the fixing clip projection 120 may not come into contact with the head 310 of the screw.

With respect to the insertion direction between the vertebrae of the main body 200, the front of the clip protrusion for blocking 110 is formed to be inclined, and the rear surface of the protrusion for blocking the clip 110 is formed perpendicular to the insertion direction between the vertebrae of the body 200 can be

As described above, while the screw 300 moves in the direction to be coupled with the screw hole 210, the head 310 of the screw and the front of the inclined clip projection 110 come into contact with the screw head 310 is blocked. When the front surface of the clip protrusion 110 is pressed, the clip protrusion 110 for blocking may be moved in a direction spaced apart from the central axis of the screw hole 210 .

And, when the head 310 of the screw passes through the clip projection 110 for blocking, the projection projection 110 for blocking the clip 100 by the elasticity of the clip 100 is again moved toward the central axis of the screw hole 210, the screw It can return to the initial position before contact with the head (310).

After that, when the patient who has been treated using the prosthetic material of the present invention moves and pressure or vibration is applied to the body 200 , the screw 300 rotates in the other direction and moves in a direction away from the screw hole 210 . , The head 310 of the screw is in contact with the rear surface of the clip protrusion 110 for stopping formed as described above, and the head 310 for the stop clip 110 supports the head 310 of the screw while preventing the disengagement movement of the screw 300 can do.

A plurality of clips 100 are formed, and one clip 100 and another clip 100 adjacent to each other may be coupled to the main body 200 in a symmetrical manner. The clip 100 may be formed according to the number of body grooves 220 , and two clips 100 are formed in consideration of the volume of the body 200 inserted between the vertebrae and the number and location of the screw holes 210 . can be However, the present invention is not limited thereto. Hereinafter, for convenience of understanding, a case in which two clips 100 are formed will be described.

1, 3 and 5, the jersey clip protrusion 110 formed on one clip 100 is coupled to the jersey groove 230 formed on the left side of the main body 200 to the front portion of the body ( 201) It is possible to prevent separation of the screw 300 combined with the screw hole 210 formed on the left side, and the fixing clip projection 120 formed in one clip 100 is formed on the right side of the front portion 201 of the main body. It may be coupled to the fixing groove 240 .

And, the clip protrusion 110 for blocking formed on the other clip 100 is coupled to the groove 230 for blocking formed on the right side of the main body 200 and coupled to the groove 230 for blocking formed on the right side of the front part 201 of the body. It is possible to prevent separation of the screw 300 coupled with the screw hole 210 formed on the right side of the front portion 201 of the main body, and the fixing clip projection 120 formed in the other clip 100 is the front portion of the body ( 201) may be coupled to the fixing groove 240 formed on the left side.

As described above, two or more screw holes 210 may be formed in the body 200 , and in order to prevent separation of each screw 300 coupled to each screw hole 210 , each screw 300 A clip 100 for performing a locking function may be formed. Accordingly, even if the prosthetic material of the present invention includes a plurality of screws 300, separation of each of the plurality of screws 300 is prevented, and the fixing force of the prosthetic material of the present invention to the cervical spine or the spine can be increased.

The central axis of the screw 300 may be inclined with respect to the insertion direction between the vertebrae of the body 200 . Accordingly, the central axis of the screw hole 210 may also be formed to be inclined with respect to the insertion direction between the vertebrae of the body 200 .

In addition, a plurality of screws 300 are formed, and the central axis of one screw 300 and the central axis of the other screw 300 may be inclined in different directions. Accordingly, the central axis of one screw hole 210 and the central axis of the other screw hole 210 may be formed to be inclined in different directions.

Specifically, as shown in FIGS. 1 to 6 , when two screw holes 210 are formed in the main body 200 , the outlet of one screw hole 210 is formed to face the upper portion of the main body 200 . Thus, when one screw 300 is coupled to one screw hole 210 , the body 320 of the single screw may move in the upper direction of the body 200 .

And, the outlet of the other screw hole 210 is formed to face the lower portion of the main body 200, so that when the other screw 300 is coupled to the other screw hole 210, the body 320 of the other screw is the body 200 of the main body 200. It can move in the downward direction.

As described above, when the screw 300 is coupled to the screw hole 210, the screw 300 is formed to be inclined with respect to the upper or lower surface of the body 200, so that each screw 300 avoids the cavity and moves after It can be coupled to the cervical vertebrae or the spine, and thus, bone chips or bone substitutes such as artificial bone or autogenous bone can be easily filled in the cavity to increase the fusion efficiency between the vertebrae.

In addition, one screw 300 may be coupled to a bone positioned at the upper portion of the body 200 , and the other screw 300 may be coupled to a bone positioned at the lower portion of the body 200 , so that the main body 200 . ) by being fixed by the upper and lower bones, the fixing force of the prosthetic material of the present invention can be increased.

The main body 200 may further include a main body protrusion 260 which is a protrusion formed on the upper or lower surface of the main body 200 . The body protrusion 260 allows the body 200 to be fixed without retreating when it is separated from the surgical rod after the intervertebral body is inserted, and to maintain the position where the prosthetic material of the present invention was initially inserted during fusion.

The body 200 may be formed of polyetheretherketone (PEEK) or a titanium (Ti) alloy. Here, the body 200 may have a porous shape including a plurality of pores. In addition, as described above, the clip 100 may have elasticity, and may be formed of a metal such as titanium (Ti) or a titanium (Ti) composite material for use in the human body, specifically, a polymer material and titanium (Ti). Also, the screw 300 may be formed of a titanium (Ti) alloy or the like.

In an embodiment of the present invention, it is described that the material forming each configuration is as described above, but it is not necessarily limited thereto, and biocompatible carbon fiber, carbon polymer or other polymers, various metals, etc. may be used. Of course.

The body 200 may further include a connection part 270 connected to the rod for insertion. The connection part 270 may be formed in the center of the front surface of the main body 200, and may have a shape of a hole coupled to the rod for insertion. Here, a female thread may be formed in the inside of the connection part 270, and a male thread is formed at the end of the insertion rod. Then, the end of the rod for insertion and the connecting portion 270 can be separated.

The description of the present invention described above is for illustration, and those of ordinary skill in the art to which the present invention pertains can understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. For example, each component described as a single type may be implemented in a dispersed form, and likewise components described as distributed may be implemented in a combined form.

The scope of the present invention is indicated by the following claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention.

100: clip
110: jersey clip projection
120: fixing clip projection
130: clip body
200: body
201: the front part of the body
210: screw hole
211: head hole
212: body hole
220: main body groove
230: home for jersey
240: fixing groove
250: cavity
260: body projection
270: connection
300: screw
310: screw head
320: the body of the screw

Claims (10)

a body inserted between the cervical vertebrae or vertebrae of the spine, the body having a cavity penetrating from the upper surface to the lower surface, a screw hole that is a hole formed in the direction of the cavity from the front, and a main body groove that is a groove formed along both sides and the rear surface;
a screw coupled to the screw hole while rotating in one direction, the screw being inserted into and fixed to the cervical vertebrae or vertebrae; and
A clip inserted into the main body groove, coupled to the main body, and provided with a jersey clip protrusion protruding into the screw hole;
When the screw is rotated in the other direction after the screw hole and the screw are combined, the clip for preventing screw separation, characterized in that the stopper clip protrusion presses the head of the screw to prevent the screw from coming off Freestanding intervertebral body fusion prosthesis.
The method according to claim 1,
The clip is a self-supporting intervertebral body having a clip for preventing screw separation, characterized in that it further comprises a fixing clip protrusion formed on the other end of the clip at a position corresponding to one end of the clip on which the clip protrusion for stopping is formed. fusion implants.
The method according to claim 1,
A self-supporting intervertebral body fusion prosthesis having a clip for preventing screw separation, characterized in that with respect to the insertion direction between the vertebrae of the main body, the front surface of the clip protrusion for stopping is inclined and the rear surface of the protrusion for stopping the clip is formed vertically .
The method according to claim 1,
The clip is formed in plurality, and a self-supporting intervertebral body fusion prosthesis having a clip for preventing screw separation, characterized in that one clip and another adjacent clip are coupled to the main body in a symmetrical manner.
The method according to claim 1,
The central axis of the screw is a self-supporting intervertebral body fusion prosthesis having a clip for preventing screw separation, characterized in that it is inclined with respect to the insertion direction between the vertebral bodies of the main body.
6. The method of claim 5,
A plurality of screws are formed, and the central axis of one screw and the central axis of the other screw are inclined in different directions.
The method according to claim 1,
The main body, a self-supporting intervertebral body fusion prosthesis having a clip for preventing screw separation, characterized in that it further comprises a main body protrusion which is a protrusion formed on the upper or lower surface of the main body.
The method according to claim 1,
A self-supporting intervertebral body fusion prosthesis having a clip for preventing screw separation, characterized in that the rear surface of the main body has a curved surface.
The method according to claim 1,
The body is a self-supporting intervertebral fusion prosthesis having a clip for preventing screw separation, characterized in that it is formed of polyetheretherketone (PEEK) or titanium (Ti) alloy.
The method according to claim 1,
The main body, a self-supporting intervertebral body fusion prosthesis having a clip for preventing screw separation, characterized in that it further comprises a connection portion connected to the insertion rod.

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