KR101889365B1 - Structure of plate hybrid cage - Google Patents

Abstract

The present invention relates to an intervertebral body fusion device (spinal cage) structure, and more specifically, to an intervertebral body fusion device structure which includes a case body including a hollow hole inside, a metal plate fixed to a rear portion of the cage body through a fixing bolt, a screw inserted and penetrating into a screw hole formed on the metal plate, and a locking device installed at a rear portion of the metal plate to prevent the screw from being detached. Therefore, the cage body is prevented from being separated from the treatment site and the screw is prevented from being separated from a vertebral body.

Description

[0001] STRUCTURE OF PLATE HYBRID CAGE [0002]

More particularly, the cage body inserted between adjacent vertebrae and the metal plate through which the screw is inserted is fastened to each other, so that the cage body can have a firm fixing force at the operation site, The present invention relates to a metal plate fastening type interbody fusion splice member structure capable of preventing a screw from being detached by a locking device coupled to a metal plate.

The vertebrae can be structurally problematic due to various problems such as congenital, degenerative or accidental problems in the stable arrangement or narrowing of the space between the vertebrae. Typical spinal diseases include vertebral deformities, vertebral fractures, herniated discs, spinal stenosis, and posterior articular hypertrophy. These spinal diseases require surgical treatment if symptoms become worse and conservative treatment becomes difficult.

Among the surgical methods, spinal fusion is performed by removing the intervertebral disc from the vertebra, inserting a spinal cage between the vertebrae to secure space for bone growth, It is a procedure that improves the spacing between the vertebrae to alleviate the pain and restores the lordosis of the vertebrae to maintain the stability of the vertebrae.

In general, the intervertebral foraminal prosthesis used in vertebral fusion has a hollow formed inside it, a bone chip is inserted, and bone is united between the upper vertebra and the lower vertebral body as the present chip is regenerated.

Various types have been developed according to the procedure and the like, and a shape for restoring the biomechanical stability of the vertebrae is being developed variously while being implanted in a human body. The intervertebral body is mainly composed of a biocompatible material with mechanical properties and biocompatibility suitable for supporting human body load, since it is required to maintain a constant gap between the vertebrae. The intervertebral foraminal prosthesis requires a procedure to fix the upper vertebral body and the lower vertebral body so that it does not separate from the implantation site until the bony union is stabilized.

However, since the conventional interbody fusion splinting material is merely inserted between the vertebrae, there is a problem that when the interventionalist moves excessively, the splinting fusion splinting material may slip or fall off at the treatment site. In the TLIF (Transforaminal Lumbar Interbody Fusion), which has been reported to have the best fusion rate, posterior movement has been observed, which may result in spinal deformity, neurological weakness, and nonunion.

In order to prevent this, there has been disclosed a form in which a tooth is formed on the upper surface or the lower surface of the cholangioclavicular prosthesis so as to increase the fixation force. However, such a shape change may also be caused by a gap between the vertebrae depending on the physique, posture, There is a problem in that the collapsible material can still be separated.

It should be understood that the foregoing description of the background art is merely for the purpose of promoting an understanding of the background of the present invention and is not to be construed as an admission that the prior art is known to those skilled in the art.

[Prior Art Literature]
1. Published Patent Application No. 10-2011-0081351 (Published on July 13, 2011)
2. Chinese Patent Publication No. 105287062 (published on Mar. 02, 03)
3. Open Patent Publication No. 10-2008-0085010 (published on September 22, 2008)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a metal plate fastening type interbody fusion splinter member structure in which a cage body and a metal plate are fastened to each other to prevent the cage body from being dislodged from a treatment site .

Another object of the present invention is to provide a metal plate fastening type interbody bolt member structure that prevents a screw from being separated from a vertebral body by engaging a locking device on a rear portion of the metal plate.

The technical objects to be achieved by the present invention are not limited to the above-mentioned technical problems, and other technical subjects which are not mentioned can be clearly understood by those skilled in the art from the description of the present invention .

According to an aspect of the present invention, there is provided a cage comprising: a cage body having a hollow therein; A metal plate fastened to a rear portion of the cage body via a fixing bolt; A screw inserted into the screw hole formed in the metal plate; And a locking device installed at a rear portion of the metal plate to prevent the screws from being separated from the metal plate. And a metal plate fastening type fused-sheath type sheath member structure including the metal plate fastening body.

In the metal plate fastening body according to an embodiment of the present invention, the metal plate may have a female screw structure integrally formed at a rear portion of the cage body, or a female screw structure coupled to a rear portion of the cage body, And is preferably fastened to the cage body as it is engaged.

In the metal plate fastening body of the present invention, the fastening bolt may include a threaded portion having a plurality of threads to be coupled to a rear portion of the cage body; A head portion disposed at a rear side of the threaded portion and having a tool groove formed therein; And a restricting end for contacting and supporting the rear of the metal plate is formed between the screw portion and the head portion so as to have a relatively larger diameter than a fastening hole formed in the metal plate.

In the metal plate fastening body according to the present invention, the female screw structure includes an insertion portion inserted into a screw hole formed in a rear portion of a cage body, and having a plurality of internal threads formed therein; And a support portion having a diameter larger than that of the screw hole and contacting the rear portion of the cage body; .

According to another aspect of the present invention, there is provided a metal plate fastening type interbody bolus-type sheath member structure, comprising: a plurality of cut-out portions formed on a side portion of the insertion portion to elastically deform an insertion portion; .

The metal plate fastening type fusing unit according to an embodiment of the present invention includes a latching jaw extending outward from an end of the insertion portion and inserted into a latching groove formed at an end of the screw hole; .

The metal plate fastening body according to an embodiment of the present invention is provided with a position regulating protrusion protruding from a front portion of the metal plate and inserted into a position regulating groove formed in a side portion of the cage body to prevent the metal plate from rotating. ; .

In the metal plate fastening body according to the embodiment of the present invention, the locking device includes a turning part inserted into a protrusion formed on a rear part of a metal plate so as to be rotatable; And a wing portion extending outwardly from the rotation portion; .

In the metal plate fastening body according to the present invention, the ends of the protrusions extend outward to form an engaging structure, and a seating portion is formed in the rotating portion so that the end of the protrusions can be inserted therein .

It is preferable that a plurality of elastic portions are formed on the wing portion so that the wing portion can be elastically deformed in the metal plate fastening type interbody fusion spliced member structure according to the embodiment of the present invention.

In the metal plate fastening body according to the present invention, it is preferable that one side of the metal plate is formed with an opening preventing edge which is in contact with an end of the wing portion in response to rotation of the swinging portion, .

Further, in the metal plate fastening type fused-joint beam structure according to the embodiment of the present invention, it is preferable that the other side of the metal plate is formed with a limit preventing lip which contacts the side portion of the wing portion and prevents the wing portion from rotating.

According to the present invention having the above-described structure, there is an effect that the cage body and the metal plate are mutually fastened with the fixing bolts, and the cage body is prevented from being dislodged from the treatment site due to movement or external force after the operation. At this time, a restricting end is formed between the screw portion of the fixing bolt and the head portion, so that the metal plate is more firmly fixed.

Further, according to the present invention, a locking device is provided at the rear portion of the metal plate, thereby preventing the screw, which has entered the upper vertebrae and the lower vertebrae, from loosening due to external force and being separated.

In addition, according to the present invention, since the position regulating protrusion is formed in the front portion of the metal plate and inserted into the position regulating groove of the cage body, the fastening is more easily performed, and the metal plate after the fastening is prevented from rotating.

Further, since a plurality of elastic portions are formed on the wing portion of the locking device, the locking device can be easily coupled by forming the locking protrusion and the limiting protrusion on the metal plate, thereby shortening the operation time and effectively preventing the screw from being detached have.

As a result, according to the present invention, the cage body, which is simply located between the vertebrae, can be fastened to the metal plate to have a firm fixation force, and the joining between the parts can be simplified, thereby simplifying the procedure and reducing the procedure time.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a structure of a metallic plate fastening type fused-joint beam member according to an embodiment of the present invention; FIG.
2 is a perspective view illustrating a cage body according to an embodiment of the present invention.
3 is a sectional view taken along the line AA 'in Fig. 1;
4 is a perspective view illustrating a female screw structure according to an embodiment of the present invention.
5 is a perspective view showing a front view of a metal plate according to an embodiment of the present invention.
FIG. 6 is a perspective view showing a rear view of a metal plate according to an embodiment of the present invention. FIG.
FIG. 7 is a perspective view illustrating a locking device according to an embodiment of the present invention. FIG.
FIG. 8 is a cutaway perspective view showing an internal view of a locking device according to an embodiment of the present invention; FIG.
FIG. 9 is a sectional view showing a state where a locking device is coupled to a metal plate according to an embodiment of the present invention. FIG.
10 is a view showing a state where a locking device according to an embodiment of the present invention is brought into contact with an opening preventing jaw.
11 is a view of a locking device in contact with a limiting bend according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings in order that the present invention can be easily carried out by those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

In addition, terms and words used in the present description and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concept of the term appropriately to describe its own invention in the best way. It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined.

FIG. 1 is a perspective view showing a shape of a metallic plate fastening type fused-joint boom member according to an embodiment of the present invention.

The metal plate fastening type interbody bolt member structure according to the present invention includes a cage body 10, a metal plate 20, a screw 30, and a lock device 40. The cage body, the metal plate, the screw, and the locking device may be combined with each other organically.

In the illustrated embodiment, a metal plate 20 is fastened to a rear portion of the cage body 10 via a fixing bolt 50, and two or more screws 30 Is inserted. A lock device (40) is provided at the rear portion of the metal plate (20) to prevent the screw (30) from detaching from the vertebral body.

As described above, according to the present invention, since the cage body 10 and the metal plate 20 are fastened together, the screw 30 is firmly fixed to the vertebral body and is not easily released by the locking device 40, It is possible to prevent separation between the two.

Hereinafter, each component of the metal plate fastening type interbody fusion spliced structure according to the present invention will be described in detail.

2 is a perspective view illustrating a cage body according to an embodiment of the present invention.

The cage body 10 is inserted between the vertebrae to maintain a space between the vertebrae and secure a space for the bone to grow therein for fusion.

A hollow 11 is formed in the cage body 10 and an autograft, an allograft or a synthetic bone is filled in the hollow 11 to promote the growth of the bone. do.

The cage body 10 may be made of a biocompatible metal such as titanium or the like, and may be made of a resin material having properties close to the natural bone of a human body, such as PEEK (polyetheretherketone), which is a biocompatible polymer.

In the illustrated embodiment, the cage body 10 is formed in a rectangular parallelepiped shape that is long in the front-rear direction, but may be formed in various shapes such as a screw shape, a bullet shape, and a square shape.

A plurality of teeth 12 are formed on the upper surface and the lower surface of the cage body 10 so as to dig into the upper and lower vertebrae so that the cage body has a constant fixing force between the vertebrae. The plurality of teeth 12 maintains the position of the cage body stably at the initial stage of the spine fusion procedure.

A position regulating groove 13 is formed in the side of the cage body 10 so that the position regulating protrusion 23 of the metal plate 20 to be described later can be inserted. The position regulating groove 13 serves to easily hold the fastening position when fastening the metal plate 20 and to prevent the metal plate from rotating after fastening.

Further, the rear portion of the cage body 10 may be coupled with a female screw structure 60 described later. The female screw structure 60 is coupled to the cage body in an engaging manner, and a plurality of female threads are formed therein to fasten the fixing bolt 50.

3 is a cross-sectional view taken along the line A-A 'in FIG. 1, and FIG. 4 is a perspective view showing a state of a female screw structure according to an embodiment of the present invention.

3, the metal plate 20 is fixed to the rear portion of the cage body 10 by the engagement of the female screw structure 60 coupled to the rear portion of the cage body 10 with the fixing bolt 50, Respectively.

In the illustrated embodiment, the female screw structure 60 is formed of a separate component from the cage body 10 and is coupled to the rear portion of the cage body, but may be formed of a female thread itself formed integrally with the cage body.

In the case of forming the female screw structure 60 integrally with the cage body 10, there is an advantage that the cost of the product is reduced and the assembling time is shortened. In the case where the female screw structure 60 is constituted by a separate component from the cage body 10, And the female thread structure can be formed of different materials so that the thread can be prevented from being easily broken and the part can be easily replaced when the thread is broken according to the use of the product. For example, when the cage body is formed of a resin-based material, a metal or alloy material can be used for the female screw structure.

The fixing bolt 50 includes a threaded portion 51 having a plurality of threaded portions for engaging with the female threaded or female threaded structure 60 and a tool groove 53a disposed at the rear of the threaded portion for inserting the fastening mechanism And a head portion 53. [

A restraining end 52 having a relatively larger diameter than the fastening hole 21 formed in the metal plate 20 and contacting and supporting the rear of the metal plate 20 is provided between the threaded portion 51 and the head portion 53 .

As the fixing bolt 50 rotates and enters the female screw structure 60, the restraint end 52 gradually moves in the direction of the metal plate 20. When the fixing bolt 50 is completely engaged with the female screw structure 60, The end 52 is in full contact with the rear surface of the metal plate 20. [ That is, the metal plate 20 is firmly fixed by the rear surface of the cage body 10 and the restraining end 52 of the fixing bolt 50.

4, the female screw structure 60 has an insertion portion 61 inserted into a screw hole 14 formed in the rear portion of the cage body 10, and an insertion portion 61 having a relatively larger diameter than the screw hole 14 And a support portion 64 contacting the rear portion of the cage body 10.

A plurality of female threads are formed in the insertion portion 61 to be coupled to the fixing bolt 50 and a plurality of cutouts 62 are formed on the side of the insertion portion 61 so that the insertion portion can be elastically deformed .

In the illustrated embodiment, the plurality of cut-out portions 62 are arranged at intervals of 120 degrees in the longitudinal direction on the side of the insertion portion 61. However, the present invention is not limited thereto, It can be formed in various ways regardless of the form or number.

Further, at the end of the insertion portion 61, a latching protrusion 63 extends outward. That is, a hook-shaped hook is formed at the end of the insertion portion. The engaging jaw 63 is inserted into the engaging groove 14a formed at the end of the threaded hole 14 so that the detachment of the female screw structure 60 is prevented.

The diameter of the engaging groove 14a is relatively larger than the diameter of the threaded hole 14 and the diameter of the inserting portion 61 is equal to or slightly smaller than the diameter of the threaded hole 14, The width and the diameter of the latching jaw (63) are larger than the diameter of the screw hole (14).

When the user holds the support portion 64 and pushes the insertion portion 61 into the screw hole 14 in order to engage the female screw structure 60 with the cage body 10, The engaging protrusion 63 is inserted into the engaging groove 14a while being unfolded at the end of the threaded hole 14. The engaging protrusion 63 is inserted into the engaging groove 14a.

FIG. 5 is a perspective view showing a front view of a metal plate according to an embodiment of the present invention, and FIG. 6 is a perspective view illustrating a rear view of a metal plate according to an embodiment of the present invention.

The metal plate 20 is coupled to the rear portion of the cage body 10 and is fastened to the cage body 10 via the fixing bolt 50. [ A fastening hole (21) is formed in the center of the metal plate (20) so that the fastening bolt (50) can pass through it.

Positioning protrusions 23 protrude from both sides of the fastening hole 21 and are inserted into the position regulating groove 13 formed on both sides of the cage body 10. [ The position regulating protrusion 23 serves to help the metal plate 20 to be quickly positioned at an accurate position when the metal plate 20 is coupled to the cage body 10. [ After the metal plate 20 is coupled to the cage body 10, it serves to prevent the metal plate from rotating about the fixing bolt.

A screw hole 22 is formed on the upper and lower sides with respect to the fastening hole 21. The screw 30 is inserted into the screw hole 22 and the screw passes through the screw hole to enter the upper vertebra and the lower vertebra. As the screw 30 is fixed to the upper vertebral body and the lower vertebral body, the metal plate 20 is also fixed.

The screw 30 is composed of a threaded body part 31 and a rear head part 32 and the head part 32 of the screw 30 is configured to be caught in the screw hole 22. [ That is, the minimum diameter of the screw hole 22 is larger than the maximum outer diameter of the screw body portion 31 and smaller than the maximum outer diameter of the head portion 32.

A part of the screw hole 22 is formed of an inclined surface 22a having a predetermined angle. That is, the inside of the screw hole 22 has a tapered shape in which the diameter of the inlet and the diameter of the outlet are different from each other. This is so that the screw 30 is coupled to the upper vertebral body and the lower vertebra when tilted at a predetermined angle with respect to the cage body 10.

On the rear surface of the metal plate 20, a protrusion 24 is formed along the periphery of the fastening hole 21. The projecting portion 24 is a portion into which the turning portion 41 of the locking device 40 described later is inserted. On the rear surface of the metal plate 20, an opening preventing jaw 25 is formed at one side with respect to the screw hole 22, and a limiting jaw 26 is formed at the other side. The open and closed limits restrict the behavior of the lock.

FIG. 7 is a perspective view showing a locking device according to an embodiment of the present invention, FIG. 8 is a cutaway perspective view showing an inside view of a locking device according to an embodiment of the present invention, FIG. 5 is a cross-sectional view illustrating a state where a locking device is coupled to a metal plate according to an embodiment.

As shown in Fig. 7, the locking device 40 includes a pivot portion 41 pivotally coupled to the rear portion of the metal plate 20, and a wing portion 44 extending outward from the pivot portion. On the outer circumferential surface of the rotary portion 41, a mechanism engagement portion 42 is formed so as to be fastened to various mechanisms. The mechanism coupling portion 42 may be formed of polygonal or star-shaped, but is not limited thereto.

A plurality of elastic portions 45 are formed on the wing portion 44 so that the wing portions can be elastically deformed. In the illustrated embodiment, the plurality of elastic portions 45 are formed in an incised shape, but any shape may be used as long as they can impart an elastic deformation force to the wing portion. For example, the plurality of elastic portions 45 may be formed of corrugated or flexible rubber.

8 and 9, the end portion 24a of the protrusion 24 formed on the metal plate 20 extends outward to form a latching structure, and the end portion 24a of the protrusion portion 24a The seat portion 43 is recessed.

The end portion 24a of the protrusion 24 is formed in an acute angle wedge shape and the end portion 43a of the mount portion 43 is formed to be symmetrical with the end of the protrusion portion. Thus, when the locking device 40 is coupled to the metal plate 20, the end portion 43a of the seat portion slides on the end portion 24a of the projection portion and is easily engaged. However, when the locking device 40 is detached from the metal plate 20 The end portion 43a of the seat portion is caught by the end portion 24a of the projection portion and is not easily separated.

FIG. 10 is a view showing a state where a locking device according to an embodiment of the present invention is in contact with an opening preventing jaw, and FIG. 11 is a view showing a state where a locking device according to an embodiment of the present invention is in contact with a limiting preventing jaw to be.

An opening preventing jaw 25 is formed on one side of the screw hole 22 of the metal plate 20 and a limiting jaw 26 is formed on the other side. When the lock device 40 is in the locked state, the wing portion 44 is located between the opening preventing jaw 25 and the limiting preventing jaw 26, and when the lock device 40 is in the unlocked state, the wing portion 44 is positioned outside the opening preventing jaw 25 Located.

The opening preventing jaw 25 is brought into contact with the end of the wing portion 44 according to the rotation of the turning portion 41, and the wing portion can selectively ride over. To this end, the opening preventing jaws 25 are formed in a round shape similar to the end portions of the wing portions 44.

When the user rotates the lock device 40 in one direction (clockwise in the illustrated embodiment) with the lock device 40 engaged with the protrusion 24 of the metal plate 20, the wing portion 44 contacts the opening preventing jaw 25, In this state, when the locking device 40 is rotated by applying more force, the wing portion 44 is contracted by the elastic portion 45 and rides over the opening preventing jaw 25. The wing portion 44, which rides over the opening preventing jaw 25, comes into contact with the head portion 32 of the screw to prevent the screw 30 from coming off.

If the user further rotates the locking device 40 in a state where the wing portion 44 rides over the opening preventing jaw 25, the side portion of the wing portion 44 comes into contact with the limiting preventing jaw 26, Thereby preventing excessive rotation of the locking device.

If the user desires to unlock the locking device 40, by rotating the locking device 40 in the other direction (counterclockwise in the illustrated embodiment) as opposed to the above procedure, the wing portion 44 shrinks, 25, and moves to the outside of the opening preventing chin 25.

As described above, according to the present invention, since the screw 30 can be locked or unlocked by rotating the locking device 40 in a state where it is coupled to the protrusion 24 of the metal plate 20, It is possible to effectively prevent the escape.

The present invention having the above-described structure is effective in preventing the cage body 10 and the metal plate 20 from being separated from the treatment site due to movement or external force after the cage body is fastened by the fixing bolts 50 have.

In addition, the present invention has the effect of preventing the screw 30, which has entered the upper vertebrae and the lower vertebrae, from loosening due to external force by being provided with the locking device 40 on the rear part of the metal plate 20.

As a result, according to the present invention, the cage body, which is simply located between the vertebrae, can be fastened to the metal plate to have a firm fixation force, and the joining between the parts can be simplified, thereby simplifying the procedure and reducing the procedure time.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. Will be clear to those who have knowledge of.

10: Cage body 11: hollow
12: tooth 13: position regulating groove
14: screw hole 14a:
20: metal plate 21: fastening hole
22: screw hole 22a: inclined surface of the screw hole
23: Position regulating projection 24:
24a: End 25 of the protrusion:
26: limit bust 30: screw
31: body portion of the screw 32: head portion of the screw
40: Locking device 41:
42: Mechanism fastening part 43:
43a: end portion of the seat portion 44:
45: Elastic part 50: Fixing bolt
51: screw portion 52:
53: head portion 53a: tool groove
60: female screw structure 61:
62: incision part 63:
64: Support

Claims (12)

A cage body having a hollow formed therein; A metal plate fastened to a rear portion of the cage body via a fixing bolt; A screw inserted into the screw hole formed in the metal plate; And a locking device installed at a rear portion of the metal plate to prevent the screws from being separated from the metal plate. , ≪ / RTI &
The locking device comprises:
A turning part inserted rotatably into a protrusion formed on a rear part of the metal plate; And a wing portion extending outwardly from the rotation portion; Lt; / RTI >
The wing portion is formed with a plurality of elastic portions so that the wing portions can be elastically deformed along the longitudinal direction thereof,
A ridge protrusion is formed at one side with respect to the screw hole of the metal plate so as to contact with the end of the wing portion according to the rotation of the swinging portion,
The other side of the screw hole of the metal plate contacts the side of the wing portion, and a limiting protrusion is formed to prevent the wing portion from rotating,
The end portion of the opening preventing jaw is formed in the same arc shape as the shape of the end portion of the wing portion so that the wing portion contracts while coming into contact with the opening preventing jaw,
When the locking device is in the locked state, the wing portion is located between the opening preventing jaw and the limiting preventing jaw,
And when the locking device is in the unlocked state, the wing portion is located outside the opening preventing jaw.
The metal plate according to claim 1,
And the female screw structure integrally formed on the rear portion of the cage body or the female screw structure coupled to the rear portion of the cage body is fastened to the cage body by being coupled with the fixing bolt. .
[2] The apparatus of claim 1,
A plurality of threaded threads adapted to be coupled to a rear portion of the cage body; And
A head portion disposed behind the threaded portion and having a tool groove formed therein; / RTI >
And a restricting end for contacting and supporting the rear of the metal plate is formed between the screw portion and the head portion so as to have a relatively larger diameter than a fastening hole formed in the metal plate.
The connector according to claim 2, wherein the female-
An insertion portion inserted into a screw hole formed in a rear portion of the cage body and having a plurality of internal threads formed therein; And
A support portion having a diameter larger than that of the screw hole and contacting the rear portion of the cage body; And a metal plate fastening type interbody fusion spliced member structure.
5. The method of claim 4,
A plurality of cutouts formed on the side of the insert to allow the insert to be elastically deformed; Further comprising: a metal plate fastening type interbody fusion spliced member structure.
5. The method of claim 4,
A latching jaw extending outwardly from an end of the insertion portion and inserted into a latching groove formed at an end of the screw hole; Further comprising: a metal plate fastening type interbody fusion spliced member structure.
The method according to claim 1,
A position regulating protrusion protruding from a front portion of the metal plate and inserted into a position regulating groove formed in a side portion of the cage body to prevent the metal plate from rotating; Further comprising: a metal plate fastening type interbody fusion spliced member structure.
delete The method according to claim 1,
Wherein an end of the protrusion extends outward to form a locking structure, and a seating part is recessed and formed in the inside of the pivot so that the end of the protrusion can be inserted. delete delete delete

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