KR102642809B1 - Intervertebral fusion device - Google Patents

Abstract

The intervertebral body fusion prosthesis according to an embodiment of the present invention includes: a plate; a driving member to which the plate is movably connected; a guide member disposed between the plate and the driving member; and a fastening member that is coupled to the guide member and the driving member and moves forward or backward relative to the guide member integrally with the driving member when driven, wherein when the fastening member is driven, the guide member moves the fastening member. The plate is displaced while moving forward with respect to the member and the driving member, but the front portion of the plate is moved in a direction away from the bottom of the driving member, so that the angle formed by the plate with the guide member increases, and the angle is increased. After increasing by the set angle, the entire plate moves in a direction away from the bottom of the driving member and the height increases.

Description

Intervertebral body fusion prosthesis {INTERVERTEBRAL FUSION DEVICE}

The present invention relates to an intervertebral body fusion prosthesis, and more specifically, to an intervertebral body fusion prosthesis that can be used in fusion, a surgical treatment method for spinal diseases.

Intervertebral body fusion prosthesis is a device used in fusion, a surgical treatment method for spinal diseases. When a disc is ruptured or weakened due to a disease or accident, it puts pressure on the spinal nerves and causes pain. In this case, the damaged disc is removed, and the gap between the vertebrae and the curvature (lordosis) in the intervertebral body from which the damaged area was removed is restored. Fusion between the vertebrae is performed by inserting a retaining intervertebral body fusion prosthesis.

The intervertebral body fusion prosthesis is inserted between the vertebrae from which the degenerative disc has been removed and serves to provide support between the vertebral bodies until the vertebrae are fused. In addition, intervertebral body fusion prosthesis secures the gap between vertebral bodies, relieves pain, and restores the stability of the spine.

In general, intervertebral body fusion prosthetics are individually manufactured according to the lordosis and height of the spine. When performing surgery through a posterior spinal entry method, intervertebral body fusion prosthetics that have the lordosis angle and height required for the patient are used. It is often difficult to do. Most patients requiring fusion surgery are experiencing degenerative changes in the spine, which makes it difficult to secure a wide space for the intervertebral body fusion prosthesis.

In this situation, an expandable intervertebral body fusion prosthesis is being introduced that has a low height at the time of placement and is easily inserted into the disc space, allowing the lordotic angle or height to be expanded after being positioned at the desired point. However, most of the expandable intervertebral body fusion prostheses that have been introduced previously have a form that can expand either the lordotic angle or the height, and the technology that can expand both the lordotic angle and the height has not yet been developed. Accordingly, there is a growing need to develop intervertebral body fusion prosthesis that can control both lordosis angle and height while operating stably.

Korean Patent Publication No. 10-2021-0037997 Korean Patent Publication No. 10-1371418

The present invention is intended to solve the problems of the prior art described above,

The purpose of the present invention is to provide an intervertebral body fusion prosthesis having a structure capable of adjusting both the lordotic angle and height between vertebral bodies.

Another object of the present invention is to provide an intervertebral body fusion prosthesis that can effectively and stably achieve sequential increases in lordosis angle and height.

According to one aspect of the invention, a plate; a driving member to which the plate is movably connected; a guide member disposed between the plate and the driving member; and a fastening member that is coupled to the guide member and the driving member and moves forward or backward relative to the guide member integrally with the driving member when driven, wherein when the fastening member is driven, the guide member moves the fastening member. The plate is displaced while moving forward with respect to the member and the driving member, but the front portion of the plate is moved in a direction away from the bottom of the driving member, so that the angle formed by the plate with the guide member increases, and the angle is increased. After increasing by the set angle, the entire plate moves in a direction away from the bottom of the driving member, providing an intervertebral body fusion prosthesis whose height increases.

At this time, the guide member includes a front guide portion inclined at the front portion and a rear guide portion obliquely formed at the rear portion, and the plate is inclined to be guided by the front guide portion and the rear guide portion when displaced. It may be provided with a secondary and rear guided part.

Additionally, when the plate is displaced, the angle may increase until the inclination of the front guide portion and the inclination of the front guided portion match.

In addition, while the inclination of the front guide portion and the inclination of the front guided portion match, the inclination of the rear guide portion and the inclination of the rear guided portion may match.

In addition, the guide member has a guide body formed by penetrating upward and downward, and the driving member is disposed inside the guide body and has a coupling portion between which the plate is connected and the fastening member is coupled, and the guide member. An opposing plate portion connected to the coupling portion may be provided to face the plate.

In addition, the guide member may further include a screw hole formed in the front, and the fastening member may include a screw body portion screwed to the screw hole.

In addition, the fastening member may further include a head portion connected to a rear end of the screw body portion, and the coupling portion may include a screw coupling hole formed to rotatably couple the head portion.

In addition, the guide member is in communication with the guide body and further includes a rear hole formed through a rear portion, and the coupling portion may further include a guide hole formed through a through hole so that a driving tool passing through the rear hole can enter the head portion. You can.

Additionally, the plate may have a first connection part formed in a vertical direction, and the coupling part may have a second connection part movably connected to the first connection part in the up and down direction.

In addition, the guide member may further include a lateral guide portion formed on both side walls of the guide body in the front-back direction, and the coupling portion may be provided with a lateral guided portion that is guided by the lateral guide portion when moving relative to the guide member. there is.

In addition, the lateral guide portion is provided at the top of both side walls of the guide body, the lateral guided portion is provided in a pin shape and is disposed to penetrate the coupling portion to the left and right, and one end and the other end are respectively seated on the lateral guide portion. You can.

According to an embodiment of the present invention, after the front portion rises in the vertical direction as the screw rotates to form a predetermined angle, both the lordosis angle and the height of the spine can be adjusted through a plate that moves in the overall vertical direction and increases in height. As a result, when performing fusion surgery, an appropriate lordosis angle and height of the spine can be secured depending on the patient.

According to an embodiment of the present invention, the sequential progress of increasing the lordosis angle and increasing the height is efficient and stable through displacement of the plate through the front and rear guide portions of the body and the front guided portion and rear guided portion of the plate. This can be achieved, and through this, fusion surgery can be easily performed.

Figure 1 is a perspective view of an intervertebral body fusion prosthesis according to an embodiment of the present invention.
Figure 2 is a perspective view showing the intervertebral body fusion prosthesis from another direction according to an embodiment of the present invention.
Figure 3 is an exploded perspective view of an intervertebral body fusion prosthesis according to an embodiment of the present invention.
Figure 4 is a perspective view with the angle of the plate of the intervertebral body fusion prosthesis expanded according to an embodiment of the present invention.
Figure 5 is a side view with the angle of the plate of the intervertebral body fusion prosthesis expanded according to an embodiment of the present invention.
Figure 6 is a side cross-sectional view showing a state in which the angles of the anterior guide portion and the anterior guided portion of the intervertebral body fusion prosthesis according to an embodiment of the present invention are aligned.
Figure 7 is a perspective view of the height of the plate of the intervertebral body fusion prosthesis increased after the angle is expanded according to an embodiment of the present invention.
Figure 8 is a side view of the height of the plate of the intervertebral body fusion prosthesis increased after the angle has been expanded according to an embodiment of the present invention.
Figure 9 is a diagram showing the process in which the intervertebral body fusion prosthesis is used for PLIF according to an embodiment of the present invention.
Figure 10 is a diagram showing the process in which the intervertebral body fusion prosthesis is used in TLIF according to an embodiment of the present invention.
Figures 11 to 13 are views showing a portion of a modified example of an intervertebral body fusion prosthesis according to an embodiment of the present invention.

The words and terms used in this specification and claims are not to be construed as limited in their usual or dictionary meanings, but according to the principle that the inventor can define terms and concepts in order to explain his or her invention in the best way. It must be interpreted with meaning and concepts consistent with technical ideas.

The embodiments described in this specification and the configuration shown in the drawings correspond to a preferred embodiment of the present invention, and do not represent the entire technical idea of the present invention, so the configuration may be replaced by various equivalents at the time of filing of the present invention. There may be water and variations.

In this specification, terms such as “comprise” or “have” are intended to describe the existence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to describe the presence of one or more other features. It should be understood that it does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

A component being “in front,” “posterior,” “lateral,” “above,” or “bottom” of another component means that it is in direct contact with the other component, unless there are special circumstances. It includes cases where another component is placed in the middle, as well as those placed on the “side,” “top,” or “bottom.” In addition, the fact that a component is "connected" to another component includes not only being directly connected to each other, but also indirectly connected to each other, unless there are special circumstances.

Hereinafter, an intervertebral body fusion prosthesis according to an embodiment of the present invention will be described with reference to the drawings.

Figure 1 is a perspective view of an intervertebral body fusion prosthesis according to an embodiment of the present invention, and Figure 2 is a perspective view showing an intervertebral body fusion prosthesis from another direction according to an embodiment of the present invention. Additionally, Figure 3 is an exploded perspective view of an intervertebral body fusion prosthesis according to an embodiment of the present invention.

The intervertebral body fusion prosthesis 1 according to an embodiment of the present invention is a device used in fusion, a surgical treatment method for spinal diseases. The intervertebral body fusion prosthesis (1) is inserted between the vertebrae from which the degenerative disc has been removed and serves to provide support between the vertebral bodies until the vertebrae are fused. The intervertebral body fusion prosthesis (1) according to an embodiment of the present invention makes it possible to secure both the lordosis and height of the spine.

1 to 3, the intervertebral body fusion prosthesis 1 according to an embodiment of the present invention includes a plate 100, a driving member 200, a guide member 300, and a fastening member 400. can do.

The plate 100 forms the lordosis angle and height of the intervertebral body fusion prosthesis 1. In one embodiment of the present invention, plate 100 forms the upper surface of intervertebral body fusion prosthesis 1. The plate 100 may include a plate body 110, a front guided portion 120, a rear guided portion 130, and a first connection portion 140.

The plate body 110 has an overall square shape and is penetrated in the vertical direction. The plate body 110 has side walls on all sides based on the penetrated portion.

The front guided portion 120 is guided by the front guide portion 320 of the guide member 300, which will be described later. When the plate 100 moves relative to the guide member 300 and the front guided portion 120 is guided by the front guide portion 320, the front portion of the plate 100 may be raised. In one embodiment of the present invention, the front guided portion 120 is recessed into the inner surfaces of both walls of the plate body 110, and is recessed in a downwardly inclined form from the rear to the front.

The rear guided portion 130 is guided by the rear guide portion 330 of the guide member 300, which will be described later. When the plate 100 moves relative to the guide member 300 and the rear guided portion 130 is guided by the rear guide portion 330, the rear portion of the plate 100 may be raised. In one embodiment of the present invention, the rear guided portion 130 is provided on the rear side wall of the plate body 110 and is formed to be inclined downward from the rear to the front.

The first connection portion 140 connects the plate 100 to the driving member 200. In one embodiment of the present invention, the first connection part 140 may be movably connected in the vertical direction to the second connection part 212 of the driving member 200, which will be described later. In one embodiment of the present invention, the first connection portion 140 protrudes from the inner surfaces of both walls of the plate body 110 and may have a pillar shape extending in the vertical direction.

The driving member 200 is a component to which the plate 100 is movably connected. A fastening member 400 is driveably coupled to the driving member 200, and the driving member 200 moves relative to the guide member 300 integrally with the fastening member 400 according to the driving of the fastening member 400. . In one embodiment of the present invention, the driving member 200 may include a coupling portion 210 and an opposing plate portion 220.

The coupling portion 210 is disposed within the guide body 310 of the guide member 300, is connected to the plate 100, and is coupled to the fastening member 400. The coupling portion 210 is provided on both walls of the coupling body 211 so that the box-shaped coupling body 211 penetrating up and down and the first connecting portion 140 of the plate 100 are movably connected in the vertical direction. The second connection part 212 and the fastening member 400 are coupled to the screw coupling hole 213 and the screw coupling hole 213 formed through the front side wall of the coupling body 211 in the front and rear direction so that the fastening member 400 is rotatably coupled. It may include a guide hole 214 formed through the rear side wall of the coupling body 211 in the front-back direction so that a driving tool for rotating the screw can reach the screw coupling hole 213.

The opposing plate portion 220 is connected to the coupling portion 210 so as to face the plate 100 with the guide member 300 interposed therebetween. In more detail, the opposing plate portion 220 may be connected to the lower portion of the coupling portion 210 with a predetermined area. That is, the opposing plate portion 220 may form the lower surface of the intervertebral body fusion prosthesis 1. The opposing plate portion 220 may have a vertically pierced shape to communicate with the pierced portion of the coupling body 211.

The guide member 300 is disposed between the plate 100 and the driving member 200. The guide member 300 guides the displacement of the plate 100 while moving forward or backward relative to the driving member 200 and the fastening member 400. In one embodiment of the present invention, the guide member 300 may include a guide body 310, a front guide portion 320, a rear guide portion 330, a screw hole 340, and a rear hole 350. .

The guide body 310 has a frame shape with the top and bottom penetrating. The guide body 310 may have an overall square shape. The coupling portion 210 of the driving member 200 is disposed inside the guide body 310, and the driving member 200 is guided according to the rotation of the fastening member 400 rotatably coupled to the coupling portion 210. It moves relative to the guide member 300 within the body 310.

The front guide portion 320 is formed to be inclined at the front portion of the guide body 310. The front guide portion 320 guides the front guided portion 120 of the plate 100 during relative movement with the plate 100 and guides the rise of the front portion of the plate 100. In one embodiment of the present invention, the front guide portion 320 protrudes from the side walls of the front portion of the guide body 310 on both sides and is formed at a predetermined angle to slope downward from the rear to the front.

The angle formed by the front guide portion 320 with respect to the ground in the non-expanded state of the plate 100 as shown in FIGS. 1 to 3 is greater than the angle formed by the front guided portion 120 of the plate 100 with respect to the ground. It is formed small. Accordingly, when the plate 100 is displaced, the front portion of the plate 100 rises until the angle between the front guide portion 320 and the front guided portion 120 with respect to the ground becomes the same, and the lordosis angle (Lordosis) ) may occur.

The rear guide portion 330 is formed to be inclined at the rear portion of the guide body 310. The rear guide portion 330 guides the rear guided portion 130 of the plate 100 during relative movement with the plate 100. In other words, the rear portion of the plate 100 is guided to rise by the rear guide portion 330. In one embodiment of the present invention, the rear guide portion 330 protrudes from the side walls of the rear portion of the guide body 310 on both sides and is formed at a predetermined angle to slope downward from the rear to the front.

The angle that the rear guide part 330 makes with respect to the ground may be formed to be the same as the angle that the front guide part 320 makes with respect to the ground. Meanwhile, the angle formed by the rear guide part 330 with respect to the ground is smaller than the angle formed by the rear guided part 130 with respect to the ground when the plate 100 is not expanded. Accordingly, when the plate 100 is displaced, the front portion of the plate 100 rises until the rear guided portion 130 and the rear guide portion 320 of the plate 100 come into contact, and the lordosis angle (Lordosis) Expansion may occur. When the inclination of the front guide part 320 and the inclination of the front guided part 120 are matched, the inclination of the rear guide part 330 and the inclination of the rear guided part 130 may be matched.

The screw hole 340 may be formed in the front of the guide body 310. The screw hole 340 may be formed by penetrating the front side wall of the guide body 310 forward and backward. When the fastening member 400 is provided as a screw, the fastening member 400 screwed to the coupling portion 210 of the driving member 200 disposed on the guide body 310 is engaged and disposed in the screw hole 340. You can. Accordingly, when the fastening member 400 is driven, the guide member 300 can move forward or backward relative to the driving member 200 and the fastening member 400.

The rear hole 350 communicates with the guide body 310 and is formed at the rear of the guide body 310. In more detail, the rear hole 350 may be formed by penetrating the rear side wall of the guide body 310 in the front-to-back direction. The rear hole 350 allows a driving tool for driving the fastening member 400 to enter the inside of the guide body 310. The driving tool that enters the guide body 310 through the rear hole 350 penetrates the guide hole 214 of the coupling part 210, reaches the screw coupling hole 213, and is coupled to the screw coupling hole 213. The fastening member 400 can be rotated.

The fastening member 400 provides driving force for displacement of the plate 100. In one embodiment of the present invention, the fastening member 400 may be provided as a screw. At this time, the fastening member 400 may be engaged with the guide member 300 while rotatably coupled to the driving member 200. When the fastening member 400 rotates, the guide member 300 moves relative to the driving member 200 and moves forward or backward, and displacement of the plate 100 occurs according to the relative movement of the guide member 300. do. When the intervertebral body fusion prosthesis (1) is inserted into the space between the patient's vertebrae, the plate (100) and the driving member (200) are fixed, so when the fastening member (400) rotates, the guide member (300) moves forward or backward.

In one embodiment of the present invention, the fastening member 400 is provided in the head portion 410 and the head portion 410 rotatably coupled to the screw coupling hole 213 of the coupling portion 210 of the driving member 200. It may include a screw body portion 420 that extends forward and is screwed to the screw hole 340 of the guide member 300.

Below, we will look at the operation of the intervertebral body fusion prosthesis (1) according to an embodiment of the present invention.

When the fastening member 400 rotates in one direction while the plate 100 is not extended with respect to the guide member 300, the guide member 300 moves forward with respect to the fastening member 400 and the driving member 200. Plate 100 is displaced. At this time, the front portion of the plate 100 is preferentially moved in the vertical direction to increase the angle between the plate 100 and the guide member 300.

Figure 4 is a perspective view with the angle of the plate of the intervertebral body fusion prosthesis expanded according to an embodiment of the present invention. In addition, Figure 5 is a side view of the plate angle of the intervertebral body fusion prosthesis according to an embodiment of the present invention, and Figure 6 is a front view of the front guide portion and the front of the intervertebral body fusion prosthesis according to an embodiment of the present invention. This is a side cross-sectional view to show that the angles of the guided part are aligned.

Referring to Figures 4 to 6, the angle extension of the front portion of the plate 100 is determined by the angle α formed by the front guided portion 120 of the plate 100 with respect to the ground and the front guide of the guide member 300. The process continues until the angle (β) formed by the unit 320 with respect to the ground becomes the same. The angle (β) formed by the front guide unit 320 with respect to the ground may correspond to the lordosis of the spine that can be provided by the intervertebral body fusion prosthesis (1). In addition, as the front portion of the plate 100 rises, the plate 100 moves backward relative to the guide member 300, and the rear guided portion 130 and the rear guided portion 320 of the plate 100 They come into contact.

In this way, at the initial stage of displacement of the plate 100, the front portion of the plate 100 rises until the angles between the front guide portion 320 and the front guided portion 120 with respect to the ground become the same. As a result, expansion of the lordosis may occur. Through this process, the intervertebral body fusion prosthesis (1) can make the lordotic angle of the spine to a preset angle while inserted into the patient's intervertebral body space.

Figure 7 is a perspective view of the height of the plate of the intervertebral body fusion prosthesis increased after the angle is expanded according to an embodiment of the present invention. In addition, Figure 8 is a side view of the height of the plate of the intervertebral body fusion prosthesis increased after the angle is expanded according to an embodiment of the present invention.

Referring to Figures 7 and 8, the elevation of the front portion of the plate 100 is maximized so that the angle formed by the front guided portion 120 of the plate 100 with respect to the ground and the front guide portion of the guide member 300 When the angle formed by 320 with respect to the ground becomes the same and the rear guided portion 130 and the rear guided portion 320 of the plate 100 are in contact with each other, the fastening member 400 rotates additionally in one direction. , the entire plate 100 moves in the vertical direction and its height increases. That is, after the angle increases by the set angle, when the fastening member 400 is further rotated, the front guided part 120 and the rear guided part 130 of the plate 100 are connected to the front guided part ( As the guide member 300 moves relatively forward with respect to the driving member 200 while in contact with the rear guide portion 320) and the rear guide portion 330, the plate 100 moves overall vertically upward, and thus further The height of the rod fusion prosthesis (1) is expanded. At this time, the expansion height can be set to correspond to the height of the space between the intervertebral bodies that the intervertebral body fusion prosthesis 1 is to secure.

Meanwhile, in relation to the relative movement between the driving member 200 and the guide member 300, the guide member 300 further includes lateral guide portions 360 formed in the front and rear directions on both side walls of the guide body 310, , the coupling portion 210 of the driving member 200 may be provided with a lateral guided portion 215 that is guided by the lateral guiding portion 360 when moving relative to the guiding member 300. In one embodiment of the present invention, the lateral guide portion 360 is provided at the upper corners of both side walls of the guide body 310, and the lateral guided portion 215 is provided in a pin shape to move the coupling portion 210 to the left and right. It is disposed to penetrate through and one end and the other end are respectively seated on the lateral guide portion 360. In relation to this, the coupling portion 210 of the driving member 200 may further include a lateral guided portion placement hole 215a formed through the left and right sides so that the lateral guided portion 215 is disposed through the lateral guided portion 215 .

Figure 9 is a diagram showing the process in which the intervertebral body fusion prosthesis is used for PLIF according to an embodiment of the present invention. Figure 10 is a diagram showing the process in which the intervertebral body fusion prosthesis is used in TLIF according to an embodiment of the present invention.

Referring to Figures 9 and 10, the intervertebral body fusion prosthesis 1 according to an embodiment of the present invention can be used for both PLIF (Posterior Lumbar Interbody Fusion) and TLIF (Transforaminal Lumbar Interbody Fusion). The intervertebral body fusion prosthesis (1) is inserted into the space between the upper vertebral body (A1) and the lower vertebral body (A2) to expand both the lordosis and the height. Additionally, it expands after insertion into the patient's body, enabling minimally invasive procedures upon insertion.

Figures 11 to 13 are views showing a portion of a modified example of an intervertebral body fusion prosthesis according to an embodiment of the present invention.

11 to 13, in a modified example of an embodiment of the present invention, compared to an embodiment of the present invention, the front guide portion 320a of the guide member 300 is of the front portion of the guide body 310. Rather than protruding from the side wall on both sides, it is provided on the side wall of the front portion of the guide body 310. That is, the side wall of the front portion of the guide body 310 is formed as a front guide portion 320a with a predetermined angle inclined downward from the rear to the front. Additionally, correspondingly, the front guided portion 120a of the plate 100 is provided on the inner surface of the front side wall of the plate body 110 in a downwardly inclined form from the rear to the front. Through this modification, the structure of the anterior guide portion 320a and the anterior guided portion 120a is made easier while maintaining the same function of the intervertebral body fusion prosthesis 1 according to an embodiment of the present invention described above. It can be implemented.

Although one embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiment presented in the present specification, and those skilled in the art who understand the spirit of the present invention can add components within the scope of the same spirit. , other embodiments can be easily proposed by change, deletion, addition, etc., but this will also be said to be within the scope of the present invention.

100: plate 200: driving member
300: Body 400: Fastening member

Claims (11)

plate;
a driving member to which the plate is movably connected;
a guide member disposed between the plate and the driving member; and
It includes a fastening member that is coupled to the guide member and the driving member and moves relative to the guide member forward or backward integrally with the driving member when driven,
When the fastening member is driven, the plate is displaced as the guide member moves forward with respect to the fastening member and the driving member, and the front portion of the plate moves in a direction away from the bottom of the driving member, so that the plate moves forward. The angle formed with the guide member increases, and after the angle increases by the set angle, the entire plate moves in a direction away from the bottom of the driving member and the height increases,
The guide member includes a front guide portion inclined at a front portion and a rear guide portion inclined at a rear portion,
The plate has a front guided portion and a rear guided portion that are inclined to be guided by the front guide portion and the rear guide portion, respectively, when displaced.
When the plate is displaced, the angle increases until the inclination of the anterior guide portion and the inclination of the anterior guided portion match. delete delete According to claim 1,
An intervertebral body fusion prosthesis in which the inclination of the anterior guide portion and the inclination of the anterior guided portion match, and the inclination of the rear guide portion and the inclination of the posterior guided portion match. According to claim 1,
The guide member has a guide body formed by penetrating upward and downward,
The driving member is disposed inside the guide body and includes a coupling portion to which the plate is connected and the fastening member is coupled, and an opposing plate portion connected to the coupling portion to face the plate with the guide member interposed therebetween. Intervertebral body fusion prosthesis. According to claim 5,
The guide member further includes a screw hole formed at the front,
The fastening member is an intervertebral body fusion prosthesis including a screw body portion screwed to the screw hole. According to claim 6,
The fastening member further includes a head portion connected to a rear end of the screw body portion,
The coupling portion is an intervertebral body fusion prosthesis having a screw coupling hole formed to rotatably couple the head portion. According to claim 7,
The guide member further includes a rear hole formed through a rear portion in communication with the guide body,
The intervertebral body fusion prosthesis further includes a guide hole formed through the coupling portion so that a drive tool passing through the rear hole can enter the head portion. According to claim 5,
The plate has a first connection portion formed in an upward and downward direction,
The intervertebral body fusion prosthesis wherein the coupling portion includes a second connection portion movably connected to the first connection portion in a vertical direction. According to claim 5,
The guide member further includes lateral guide portions formed on both side walls of the guide body in the front and rear directions,
The coupling part is an intervertebral body fusion prosthesis including a lateral guided part that is guided by the lateral guide part when moving relative to the guide member. According to claim 10,
The lateral guide portion is provided at the top of both side walls of the guide body, the lateral guided portion is provided in a pin shape and is disposed to penetrate the coupling portion to the left and right, and one end and the other end are respectively seated on the lateral guide portion of the intervertebral body. Fusion prosthesis.

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