CN116963683A - Spinal fixation device - Google Patents

Abstract

The present invention relates to a spinal fixation device comprising: a base; a fusion device combined with the base; a first wing plate coupled to an upper portion of the combination of the base and the cage; and a second wing plate coupled to a lower portion of the base and cage combination.

Description

Spinal fixation device

Technical Field

The present invention relates to a spinal fixation device, and more particularly, to a spinal fixation device for supporting and fixing a spinal column from which an intervertebral disc is removed when performing a spinal surgery such as cervical, thoracic, lumbar, etc.

Background

Recently, spinal diseases such as degenerative deformation of spinal structures, congenital deformation, or traumatic deformation, which are usually caused by stenosis of a spinal canal or distortion of alignment between vertebral bodies, such as forward vertebral movement or backward vertebral movement, have been frequently developed, and various operations have been performed thereon.

This spine, also called the so-called lumbar, normally consists of 5 segments, the adjacent back vertebra consists of 12 segments, and normally there is an intervertebral disc between the vertebrae which is the space formed by the individual vertebral bodies.

However, the spine has problems in stable alignment or structural problems such as reduction of the intervertebral space due to various other causes such as congenital, degenerative, and accident, and if the symptoms are deepened, surgical treatment is required.

At this time, one of the spinal fixation techniques used is an intervertebral fusion cage implantation technique, in which a patient is generally prone to lie down, skin and muscle are cut, an intervertebral disc as an intervertebral structure is removed after the bone is leaked out, and a fusion cage is implanted between spinal nerve (spinal cord) and branch nerve (root) to perform an operation.

In the fusion cage used in the past, the front side and the rear side of the fusion cage have a certain height, and after an operation, the fusion cage has a high risk of detachment, and if the front side is set to a height corresponding to the normal curvature of the spine, the fusion cage has a problem of high risk of damage to the nearby nerves when implanted.

In addition, the fusion cage used in the past is not provided with a device for preventing screws inserted into the vertebrae from being separated from the plate, so that there is a problem in that stability of the plate is lowered.

Prior art literature

Patent literature

Patent document 1: korean patent No. 10-1297982

Disclosure of Invention

Problems to be solved by the invention

The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a spinal fixation device capable of flexibly fixing a spinal column according to the shape of the spinal column, preventing movement of screws to be coupled to the spinal column, and reinforcing coupling of plates.

Solution for solving the problem

A spinal fixation device according to an embodiment of the present invention for solving the above-described problems may include: a base; a fusion device combined with the base; a first wing plate coupled to an upper portion of the combination of the base and the cage; and a second wing plate coupled to a lower portion of the base and cage combination.

The first wing plate and the second wing plate are formed to be rotatable along a guide groove of the base at positions coupled to the base and the fusion cage coupled body, respectively.

In addition, the first wing plate and the second wing plate can be combined with the base through a combining pin, and the combining pin comprises a spherical or capsule-shaped combining end.

In addition, the coupling pin may have a length such that each wing is spaced apart from the base and cage combination in a height direction.

In addition, the combining ends of the first wing plate and the second wing plate are configured between the base and the fusion device, and the fastening screw penetrates through the base and then is inserted into the fusion device, so that the base and the fusion device are combined.

The coupling ends of the first wing plate and the second wing plate are formed to adjust the fixing force according to the fastening degree of the fastening screw.

In addition, a hemispherical coupling hole is protruded in one of the base and the cage, a hemispherical insertion groove for inserting the coupling hole is formed in the other, and when the base is coupled with the cage, the coupling hole is inserted into the insertion groove, and the fastening screw is configured to couple the base and the cage by penetrating the coupling hole.

The spinal fixation device may further include a cover coupled to the first and second flanges at a position opposite to the fusion cage with respect to the base, and rotatable with respect to an axis along which the flanges are coupled.

Wherein, in the cover, protruding pieces may be formed according to the number of the plurality of screw holes, such that each protruding piece covers the plurality of screw holes at any angle at the same time.

The cover may be formed to have a compressive force in a direction along each of the wing plates by an elastic member, and may have a fixing protrusion protruding in a direction toward each of the wing plates, and each of the wing plates may have a fixing groove formed at a position opposite to the fixing protrusion, out of a position where the protruding piece covers the screw hole and a position where the protruding piece does not cover the screw hole.

In addition, the above-mentioned coupling pin may further include: a fixed end extending from the coupling end and exposed outside the base; a rotation adjusting end which is formed in a manner of combining with the fixed end and rotating at the same height by taking the fixed end as an axis, and is internally formed with threads; and a height-variable end coupled to the wing plates, screwed to the rotation-adjusting end, and ascending and descending according to the rotation of the rotation-adjusting end.

Effects of the invention

The spine fixing device according to the embodiment of the present invention can change the spine fixing angle through 2 wings, thereby flexibly fixing according to the morphology of the spine.

In addition, the spinal fixation device according to the present invention fills the space formed inside the cage with synthetic aggregate, whereby an accurate photograph can be obtained after the operation.

In addition, the spinal fixation device according to the present invention prevents detachment of screws inserted into the spinal column by the cover, thereby improving stability of coupling between the spinal fixation device and the spinal column.

Drawings

Fig. 1a and 1b are perspective and rear perspective views of a spinal fixation device in accordance with a first embodiment of the present invention.

Fig. 2 is an exploded perspective view of the spinal fixation device of fig. 1a and 1 b.

Fig. 3 is a view of fig. 2 viewed in the opposite direction.

Fig. 4 is a side cross-sectional view of the spinal fixation device exploded in fig. 2.

Fig. 5 is a side cross-sectional view of the spinal fixation device of fig. 4 in an assembled state.

Fig. 6a and 6b are views showing the joint portion of the first wing plate and the second wing plate in detail.

Fig. 7 is a view showing rotation of the first wing plate and the second wing plate according to the first embodiment of the present invention.

Fig. 8a is a view showing a spinal fixation device provided with a cover according to a first embodiment of the present invention, and fig. 8b is a view showing a state in which the cover is rotated.

Fig. 9a is an exploded perspective view of a cover of a spinal fixation device provided with elastic members, fixation protrusions, and fixation grooves exploded according to a first embodiment of the present invention, and fig. 9b is a rear perspective view of fig. 9 a.

Fig. 10 is a diagram showing the first cover in an uncompressed state and the second cover in a compressed state of the spinal fixation device of fig. 9a and 9b by cross-section comparison.

Fig. 11 is a perspective view showing an example of a coupling pin configured with a variable height according to the first embodiment of the present invention.

Fig. 12 is a view showing the coupling pin of fig. 11 in detail through a cross section.

Fig. 13 is a perspective view of a spinal fixation device according to a second embodiment of the present invention.

Fig. 14 is an exploded perspective view of the spinal fixation device of fig. 13.

Fig. 15 is a view of fig. 14 viewed in the opposite direction.

Fig. 16 is a view of the spinal fixation device of fig. 13, as viewed in a frontal direction, with the junction between the base plate and each of the wings projected.

Detailed Description

The following description of the present invention with reference to the drawings is not limited to the specific embodiments, and various modifications and various examples are possible. The following description should be understood to include all changes, equivalents, and alternatives falling within the spirit and scope of the present invention.

In the following description, the terms first, second, etc. are used to describe various components and are not limited to the terms themselves, but are used to distinguish one component from another.

Like reference numerals are used throughout this specification to designate like components.

As used herein, the expression singular includes the plural unless explicitly and separately defined in the text. Furthermore, the terms "comprises," "comprising," "includes," or "including," and the like, as used in the following description, are to be interpreted as specifying the presence of the stated features, integers, steps, acts, components, or groups thereof, but do not preclude the presence or addition of one or more other features or integers, steps, acts, components, or groups thereof.

Fig. 1a and 1b are perspective and rear perspective views of a spinal fixation device according to a first embodiment of the present invention, fig. 2 is an exploded perspective view of the spinal fixation device of fig. 1a and 1b, fig. 3 is a view of fig. 2 viewed in the opposite direction, fig. 4 is a side sectional view of the spinal fixation device exploded in fig. 2, and fig. 5 is a side sectional view of the spinal fixation device of fig. 4 in an assembled state.

Fig. 6a and 6b are views showing the joint portions of the first wing plate and the second wing plate in detail, and fig. 7 is a view showing the rotation of the first wing plate and the second wing plate according to the first embodiment of the present invention.

Referring to fig. 1a to 7, a spinal fixation device 1 according to a first embodiment of the present invention may include a base 10, a cage 20, a first wing 30, and a second wing 40.

In particular, the base 10 is coupled in front of the cage 20, preferably by a solid member. At this time, the fastening member may be fastened by a fastening screw S1 described later, and may be fastened to the fusion cage 20 by providing another fastening member instead of the fastening screw S1.

Furthermore, in addition to the fastening means, the combination of the base 10 and the cage 20 may be achieved by an insertion means or an engagement means. In the case of the insertion method, this can be achieved by: an insertion protrusion is formed at one of the base 10 and the cage 20, and an insertion groove for inserting the insertion protrusion is formed at the other. The bonding method may be various methods such as adhesion by an adhesive or welding.

However, for the sake of understanding, the following description will be given with respect to a case where the base 10 and the cage 20 are coupled by fastening means and fastening members are fastened by fastening screws S1, as shown in the drawings.

The base 10 may be formed with screw holes to achieve fastening with the cage 20. The screw hole is a hole for inserting the fastening screw S1, and may be located at the center of the base 10. Hereinafter, the screw hole formed in the base 10 is referred to as a center screw hole 11.

The cage 20 may be coupled to the rear of the base 10. Wherein the cage 20 is a plate positioned between the spines in case of implanting the spinal fixation device 1 to the spines. At this time, as shown in fig. 2, the cage 20 may be formed as one body, and a center screw hole 11 for inserting the fastening screw S1 may be formed to extend inside.

For the purpose of distinction, the center screw hole formed in the base is distinguished as a first center screw hole 11 and the center screw hole formed by extending the cage 20 is distinguished as a second center screw hole 21.

The fastening screw S1 inserted into the first and second central screw holes 11 and 21 is provided with a synthetic aggregate insertion path (not shown) therein, whereby the synthetic aggregate a can be injected, and a synthetic aggregate discharge path (not shown) extending from the synthetic aggregate insertion path along the outer circumferential surface or end direction of the fastening screw S1, whereby the synthetic aggregate a can be discharged.

At this time, the cage 20 is formed as one body with the front surface, the left/right side surfaces, and the upper/lower surfaces closed, and thus, the outflow of the synthetic aggregate a discharged through the fastening screw S1 is prevented, and the synthetic aggregate a may be built in the inside of the first or second central screw hole 11 or 21.

As described above, in the case where the synthetic aggregate a is stored in the interior of the cage 20, when the spinal fixing device 1 fixed to the spinal column is photographed, a high-quality image can be obtained, and an accurate position can be grasped from the above-described image.

Such fusion cage 20 can be formed of various biocompatible materials such as polyetheretherketone (Polyether Ether Ketone, PEEK), titanium, synthetic bone material, plastic resin, and the like.

Among them, polyetheretherketone is a high-performance thermoplastic resin having various characteristics of high strength, high rigidity, high temperature resistance, chemical resistance, etc., is a biomaterial for MRI and medical implants, and a synthetic bone material is the same as a material for artificial bones composed of calcium (Ca) and phosphorus (P).

In addition, a hemispherical coupling port 15 is protruded at one of the base 10 and the cage 20, and a hemispherical insertion groove 25 for inserting the coupling port 15 may be formed at the other. When the base 10 is coupled with the cage 20, the hemispherical coupling port 15 is inserted into the insertion groove 25, thereby fixing the positions of the base 10 and the cage 20, making the coupling easier.

In this case, the fastening screw S1 may couple the base 10 and the cage 20 by penetrating the coupling port 15.

In the combination of the base 10 and the cage 20, the first wing 30 and the second wing 40 may be combined at the upper and lower portions of the combination, respectively. At this time, the first wing 30 and the second wing 40 are coupled at the coupling site between the base 10 and the cage 20, that is, preferably, between the base 10 and the cage 20.

This is because, when a fastening screw S1 described later is inserted into the cage 20, it is brought into close contact between the base 10 and the cage 20, thereby fixing the first wing 30 and the second wing 40.

For this, a space for incorporating the coupling portion of the first wing 30 and the second wing 40 may be provided at the rear end of the base 10 and the front end of the cage 20, respectively. In the following, the coupling portions of the first wing 30 and the second wing 40 may be spherical coupling ends 32a, 42a, and thus, hemispherical coupling grooves 12, 22 for inserting the spherical coupling ends in half may be formed at the rear end of the base 10 and the front end of the cage 20, respectively.

However, the coupling position of the first wing 30 and the second wing 40 with respect to the coupling body of the base 10 and the cage 20 is not limited, and may be changed. For example, the first wing 30 and the second wing 40 may also be combined with the inside of the base 10.

In addition, the coupling form of the first wing 30 and the second wing 40 is not limited, and it is preferable that they can be coupled in a perpendicular manner with respect to the coupling body between the base 10 and the cage 20, respectively.

Further, the base 10 may be configured to be rotatable in a forward direction at a vertical coupling position, and for this purpose, guide grooves 13 for guiding rotation of the first wing 30 and the second wing 40 may be provided at an upper portion and a lower portion of the base, respectively.

The rotational structure of the first wing 30 and the second wing 40 will be described again in the following.

Further, the first wing 30 and the second wing 40 may be provided with one or more coupling pins 32, 42 to be coupled to the coupling body of the base 10 and the fusion device 20. At this time, the coupling pins 32, 42 may be formed in length such that each of the wings 30, 40 is spaced apart from the base 10.

That is, the coupling pins 32 and 42 may be formed so as to be exposed to the upper or lower portion of the combined body of the base 10 and the cage 20 in a state of being coupled to the combined body of the base 10 and the cage 20, and the first wing 30 and the second wing 40 may be formed at the ends of the coupling pins 32 and 42 exposed to the outside of the combined body of the base 10 and the cage 20.

In addition, the coupling pins 32, 42 may be coupled to the base 10 by including spherical coupling ends 32a, 42 a. Preferably, the spherical coupling ends 32a, 42a are formed at the extreme end portions of the coupling pins 32, 42, and preferably, the spherical coupling ends 32a, 42a are formed with a diameter wider than the width of the coupling pins 32, 42.

The joint pins 32, 42 rotate the respective flanges 30, 40 about the spherical joint ends 32a, 42a, and in the case where a single joint pin 32, 42 is provided, have flexibility that allows the respective flanges 30, 40 to freely rotate along the circumference of the joint ends 32a, 42a so as to match the bone that is not uniformly curved.

With the coupling ends 32a, 42a located between the base 10 and the cage 20, the coupling ends 32a, 42a penetrate through the base 10 and are inserted into the cage 20, and can be fastened by fastening screws S1 for coupling the base 10 and the cage 20.

That is, when the fastening screw S1 is tightened, the base 10 and the cage 20 are pulled in a direction of being brought into close contact with each other, and thereby the joint ends 32a, 42a located between the base 10 and the cage 20 are brought into close contact with each other, so that the first wing 30 and the second wing 40 are fixed to the joint body between the base 10 and the cage 20.

At this time, the coupling ends 32a, 42a can adjust the fixing force by the fastening degree of the fastening screw S1, thereby adjusting the rotation of the first wing plate 30 and the second wing plate 40. For example, in the case where the fastening degree of the fastening screw S1 is reinforced, the first and second wings 30 and 40 may be fixed at a rotation angle, and in the case where the fastening degree of the fastening screw S1 is weakened, the first and second wings 30 and 40 may not be fixed and rotated.

The coupling ends 32a, 42a may be formed in a row as shown in fig. 6a with the center screw holes 11, 21 and the coupling grooves 12, 22 aligned in a row, or the coupling ends 32a, 42a may be formed in an "X" shape as shown in fig. 6b with the center screw holes 11, 21 and the coupling grooves 12, 22 aligned in an "X" shape.

In addition, as described above, the first wing 30 and the second wing 40 coupled to the combination of the base 10 and the cage 20 may include one or more screw holes (reference numerals are not shown) so that the screws S2 to be fixed to the spine are inserted, and the screws S2 may be fixed to the spine through the through screw holes.

The first wing 30 and the second wing 40 may have different forms, and preferably may be formed in the same form. That is, the first wing 30 and the second wing 40 may be formed in the same manner except for the position where they are coupled to the base 10 and the rotational direction at the coupled position.

At this time, in the case where the coupling grooves 12, 22 and the central screw holes 11, 21 are aligned in a row in the horizontal direction, as the coupling pins 32, 42 of the first and second flanges 30, 40 are formed in the same form, the coupling pins 32, 42 of the first and second flanges 30, 40 may be disposed at positions eccentric to one side from the center to avoid interference. That is, when the respective coupling pins 32, 42 of the first and second wings 30, 40 are coupled with the base 10 as shown, an interleaved structure may be formed.

When the first wing 30 and the second wing 40 are formed in the same shape, the process time, the cost, and the like can be reduced by standardizing the process.

Meanwhile, the first wing 30 and the second wing 40 may be formed of a bio-compatible material to minimize in vivo rejection, for example, may be formed of titanium to secure bio-compatibility and high durability. However, this is a preferred example, and not limiting, and the materials of the first wing plate 30 and the second wing plate 40 may be replaced with materials having high biological affinity and durability.

The first wing 30 and the second wing 40 as described above may be coupled to the base 10 and the fusion cage 20 in a manner of being perpendicular only, but may be configured to be rotatable at the coupled position as shown in fig. 7.

In the case where the first wing plate 30 and the second wing plate 40 are rotatably formed, as described above, the first wing plate 30 and the second wing plate 40 can be rotated to conform to the shape of the spine by adjusting the fastening degree of the fastening screw S1, and then the rotation angle of the first wing plate 30 and the second wing plate 40 can be fixed.

In addition, the spinal fixation device 1 according to an embodiment of the present invention may further include a cover 50. This will be described with reference to fig. 8a to 10.

Fig. 8a is a view showing a spinal fixation device provided with a cover according to a first embodiment of the present invention, and fig. 8b is a view showing a state in which the cover is rotated.

Referring to fig. 8a and 8b, the cover 50 may be coupled with the first wing 30 and the second wing 40, respectively. Further, the cover 50 can be coupled at a position opposite to the fusion cage 20 with reference to the base 10.

That is, the cage 20 is coupled to the rear of the base 10, and thus the cover 50 may be coupled to the first wing 30 and the second wing 40, respectively, at the front opposite to the cage 20.

The cover 50 is rotatably disposed about an axis coupled to the respective flanges 30 and 40. At this time, the cover 50 may selectively cover the central screw hole 11 and the screw holes according to the rotation angle.

That is, the cover 50 may be disposed through the first wing 30 or the second wing 40 to prevent the screw S2 inserted into the spine from being detached. At this time, in a state where the cover 50 is opened, the screw S2 is inserted into the first wing plate 30 and the second wing plate 40, and the spine fixing device 1 is fixed to the spine, and then the cover 50 is rotated to cover the screw hole, so that the detachment of the screw S2 can be prevented.

More specifically, the cover 50 may include a first cover 50a coupled to the first wing 30 and a second cover 50b coupled to the second wing 40.

Wherein the first cover 50a may cover the screw hole formed at the first wing 30 and the upper side of the central screw hole 11 and be rotatable in a clockwise or counterclockwise direction. In addition, the first cover 50a may be formed with a plurality of protruding pieces 51 in order to cover the screw holes formed in the first wing 30 and the upper side of the central screw hole 11. At this time, the number of the protruding pieces 51 may correspond to the number of screw holes formed at the first wing 30 including the central screw hole 11.

The second cover 50b may cover the screw hole formed at the second wing 40 and the lower side of the central screw hole 11 and be rotatable in a clockwise or counterclockwise direction. In addition, the second cover 50b may be formed with a plurality of protruding pieces 51 in order to cover the screw hole formed at the second wing 40 and the lower side of the central screw hole 11. At this time, the number of the protruding pieces 51 may correspond to the number of screw holes formed at the second wing 40 including the central screw hole 11.

In the above-described configuration, first, the angles of the first flange 30 and the second flange 40 are adjusted with respect to the base 10 in a state where the screw hole and the central screw hole 11 are not covered with the respective covers 50a and 50b, and the fastening screw S1 is inserted into the central screw hole 11, whereby the angles of the first flange 30 and the second flange 40 can be fixed.

Thereafter, in order to fix the spinal fixing device 1 to the spinal column, the screws S2 may be inserted into the respective screw holes, and after the screws S2 are inserted into the respective screw holes, the first cover 50a and the second cover 50b may be rotated to cover the central screw hole 11 and the respective screw holes at the same time, whereby the fastening screw S1 inserted into the central screw hole 11 and the screws S2 inserted into the screw holes may be prevented from flowing out.

In this process, the first cover 50a and the second cover 50b cover the upper and lower ends of the central screw hole 11 of the base 10, respectively, so that the rotation of the first wing plate 30 and the second wing plate 40 can be prevented definitely.

Fig. 9a is an exploded perspective view of a cover of a spinal fixation device provided with elastic members, fixation protrusions, fixation grooves exploded according to a first embodiment of the present invention, fig. 9b is a rear perspective view of fig. 9a, and fig. 10 is a view showing a first cover in a decompressed state and a second cover in a compressed state of the spinal fixation device of fig. 9a and 9b by cross-section comparison.

Referring to fig. 9a, 9b and 10, each of the covers 50a, 50b may be provided with an elastic member 53. At this time, the elastic member 53 may be provided at an end of the rotation shaft 52 of the cover 50.

At this time, the elastic member 53 may be formed so as to have a compressive force in the direction of the lid 50 toward the respective flanges 30 and 40. That is, the lid 50 can be formed so as to be closely attached to the flanges 30 and 40 by the compressive force of the elastic member 53.

Further, the cover 50 may be protruded with more than one fixing protrusion 60 toward the wings 30, 40.

Further, each of the flanges 30, 40 may form a fixing groove 61 at a position opposite to the fixing protrusion 60 among positions where the protruding piece 51 covers the screw hole and positions where the screw hole is not covered. That is, the fixing groove 61 may be formed at least one position where the protruding piece 51 covers the screw hole and at least one position where it does not cover the screw hole.

When the cap 50 is pulled in such a manner that the elastic member 53 is pulled at a position where the protruding piece 51 does not cover the screw hole, and the cap 50 is rotated to a position where the screw hole is covered and pushed in the compression direction of the elastic member 53, the protruding piece 51 strongly presses the center screw hole 11 and the screw hole, thereby further preventing the detachment of the fastening screw S1 and the screw S2, and preventing the cap 50 from being accidentally rotated by the fixing force of the fixing protrusion 60 with respect to the fixing groove 61.

Meanwhile, the coupling pins 32, 42 described above can be formed in a highly variable manner. This will be described with reference to fig. 11 and 12.

Fig. 11 is a perspective view showing an example in which a coupling pin having a variable height is provided according to the first embodiment of the present invention, and fig. 12 is a view showing the coupling pin of fig. 11 in detail by a cross section.

Referring to fig. 11 and 12, in order to change the height, the coupling pins 32, 42 may include a fixed end 33, a rotation adjusting end 34, and a height variable end 35 in addition to the coupling ends 32a, 42a described above.

Specifically, the fixed end 33 may extend from the coupling ends 32a, 42a to be exposed to the outside of the base 10. Further, the rotation adjusting end 34 may be combined with the fixed end 33 and rotate about the fixed end 33. At this time, the rotation adjusting end 34 may form a supporting end 36 at a lower end for supporting the lower end of the rotation adjusting end 34 such that the rotation adjusting end 34 rotates only at the same height as the fixed end 33.

Further, a roller or ball (not shown) for reducing friction may be provided between the support end 36 and the rotation adjustment end 34.

The height-variable end 35 is formed so as to be coupled to each of the flanges 30 and 40, and is screwed to the rotation-adjusting end 34. Thus, when the rotation adjustment end 34 is rotated, the rotation adjustment end 34 can be raised or lowered in the rotation direction, so that the distance between the wings 30, 40 and the base 10 can be adjusted.

Fig. 13 is a perspective view of a spinal fixation device according to a second embodiment of the present invention, fig. 14 is an exploded perspective view of the spinal fixation device of fig. 13, fig. 15 is a view of fig. 14 viewed in the opposite direction, and fig. 16 is a view of the spinal fixation device of fig. 13, as viewed in the front direction, with the junction between the base and each wing plate projected.

Referring to fig. 13 to 16, the spinal fixation device according to the second embodiment of the present invention is substantially identical in composition and operation to the spinal fixation device according to the first embodiment of the present invention, but the coupling ends 32a, 42a of the coupling pins 32, 42 may be in the form of capsules (caps), and may be in the form of a cap 50 covering only screw holes (not shown) formed in the first wing plate 30 and the second wing plate 40.

That is, the coupling ends 32a, 42a are not limited to the spherical shape, and can be formed in a capsule shape as shown in fig. 13 to 16. When the coupling ends 32a, 42a are formed in the form of a capsule, there is little possibility of detachment from the base 10 or the cage 20, and there is an advantage in that the contact area with the base 10 and the cage 20 is more than a sphere, so that the angle can be maintained well.

In the case of forming the capsule-shaped coupling end, the coupling grooves 12, 22 provided at the rear end of the base 10 and the front end of the cage 20 can be provided in a semi-capsule shape in association with them.

Further, the coupling port 15 and the insertion groove 25 may not be provided between the base 10 and the cage 20, but a fastening pin 70 and a fastening groove 71 for fastening the fastening pin 70 may be provided between the base 10 and the cage 20.

The fastening pin 70 protrudes from one of the base 10 and the cage 20, and the fastening groove 71 is provided at the other of the base 10 and the cage 20, where the fastening pin 70 is not provided, so that the fastening pin 70 is inserted into the fastening groove 71, thereby forming a fixing force between the base 10 and the cage 20 together with the fastening screw S1.

Otherwise, the unexplained components are substantially the same as the spinal fixation device according to the first embodiment, and thus, a detailed description will be omitted hereinafter.

The embodiments of the present invention have been described above with reference to the drawings, and it will be understood by those skilled in the art that the present invention may be embodied in other specific forms without changing the technical spirit or essential features of the present invention. The above-described embodiments are, therefore, to be considered in all respects only as illustrative and not restrictive.

Reference numerals illustrate:

1: spinal fixation device

10: base seat

11: center screw hole

12: coupling groove

13: guide groove

15: joint opening

20: fusion device

21: center screw hole

22: coupling groove

25: insertion groove

30: first wing plate

32: coupling pin

32a: coupling end

33: fixed end

34: rotation adjusting end

35: height-variable end

36: support end

40: second wing plate

42: coupling pin

42a: coupling end

50: cover

50a: first cover

50b: second cover

51: protruding piece

52: rotary shaft

53: elastic component

60: fixing protrusion

61: fixing groove

70: fastening pin

71: fastening groove

S1: fastening screw

S2: screw nail

A: and synthesizing aggregate.

Claims (11)

1. A spinal fixation device comprising:

a base;

a cage coupled to the base;

a first wing plate coupled to an upper portion of the combination of the base and the cage; and

and a second wing plate coupled to a lower portion of the combination of the base and the cage.

2. The spinal fixation device of claim 1 wherein the device comprises a plurality of fixation elements,

the first wing plate and the second wing plate are respectively formed in a manner of rotating along a guide groove of the base at a position combined with the base and the fusion device combination body.

3. The spinal fixation device of claim 1 wherein the device comprises a plurality of fixation elements,

the first wing plate and the second wing plate are combined with the base through a combination pin, and the combination pin comprises a spherical or capsule-shaped combination end.

4. A spinal fixation device as recited in claim 3, wherein,

the coupling pin has a length such that each wing is spaced apart from the base and cage combination in a height direction.

5. A spinal fixation device as recited in claim 3, wherein,

the combining ends of the first wing plate and the second wing plate are arranged between the base and the fusion device,

the fastening screw penetrates through the base and then is inserted into the fusion device, so that the combination of the base and the fusion device is realized,

when the base and the fusion device are combined by the fastening screw, the base and the fusion device are respectively clung to the combining ends of the first wing plate and the second wing plate, so that the first wing plate and the second wing plate are fixed on the combination body of the base and the fusion device.

6. The spinal fixation device of claim 5 wherein the device,

the combined ends of the first wing plate and the second wing plate are formed in a mode of adjusting the fixing force according to the fastening degree of the fastening screw.

7. The spinal fixation device of claim 5 wherein the device,

a hemispherical coupling opening is protruded in one of the base and the cage, a hemispherical insertion groove for inserting the coupling opening is formed in the other, the coupling opening is inserted into the insertion groove when the base is coupled with the cage,

the fastening screw is configured to connect the base and the fusion cage by penetrating the connection port.

8. The spinal fixation device of claim 1 wherein the device comprises a plurality of fixation elements,

the cover is coupled to the first wing plate and the second wing plate at positions facing the fusion device with reference to the base, and is rotatable about axes coupled to the wing plates.

9. The spinal fixation device of claim 8 wherein the device comprises a plurality of fixation elements,

in the cover, protruding pieces are formed according to the number of the plurality of screw holes, so that the plurality of screw holes are simultaneously covered by the respective protruding pieces at any angle.

10. The spinal fixation device of claim 9 wherein the device comprises a plurality of fixation elements,

the cover is formed in a manner of having a compressive force along each wing plate direction by an elastic member, and is formed with a fixing protrusion protruding toward each wing plate direction,

the wing plates form fixing grooves at positions opposite to the fixing protrusions among positions where the protruding pieces cover the screw holes and positions where the protruding pieces do not cover the screw holes.

11. The spinal fixation device of claim 3 wherein the coupling pin further comprises:

a fixed end extending from the coupling end and exposed to an outside of the base;

a rotation adjustment end which is formed in a manner of being combined with the fixed end and rotating at the same height by taking the fixed end as an axis, and is internally formed with a thread; and

and a height-variable end coupled to the wing plates, screwed to the rotation-adjusting end, and ascending and descending according to the rotation of the rotation-adjusting end.