KR101866378B1

KR101866378B1 - Protection plate for spinal surgery

Info

Publication number: KR101866378B1
Application number: KR1020160146619A
Authority: KR
Inventors: 염진섭; 김남국; 최승현
Original assignee: 서울대학교병원; 울산대학교 산학협력단; 재단법인 아산사회복지재단
Priority date: 2016-11-04
Filing date: 2016-11-04
Publication date: 2018-06-14
Also published as: WO2018084597A1; KR20180050456A

Abstract

The present invention relates to a protective plate for spinal surgery, and a protective plate for spinal surgery according to the present invention is a plate for spinal surgery, which protects a nerve exposed to a defective portion of a damaged vertebra bone or a vertebra bone removed during surgery, Wherein the protective plate has a convex shape perpendicular to the longitudinal direction of the vertebra and is fixed and supported so that both ends of the convex are not stretched.

Description

{PROTECTION PLATE FOR SPINAL SURGERY}

The present invention relates to a protective plate for spinal surgery, and more particularly, to a protecting plate for spinal surgery, and more particularly, to a protecting plate for vertebra surgery, which protects the nerves exposed in a defective portion of a damaged or removed bone when the vertebrae are damaged, To a protective plate for spinal surgery used to implant similar bone union materials.

When a spinal bone is damaged by trauma or tumor, or when a part of the vertebra is removed during spinal surgery, the nerve inside the vertebrae is exposed to the outside. In this case, bone or bone fusion materials are used for bone reconstruction and fusion. At this time, bones should be implanted while protecting the exposed nerves.

Conventionally, vertebral bone graft surgery is a method of protecting a nerve by securing a wide plate-shaped autologous bone taken from a hip bone of a patient to a structure such as a vertebral rod using a tying means such as a thread or a wire, And bone grafts (BG) grafted from the hip bone of the patient to the upper part of the autogenous bone.

However, the process of collecting and processing the autogenous bone is complicated, and when the defected area is large, a sufficient size of autogenous bone (autogenous bone in the form of a plate) can not be secured. In this case, a plate replacing the autogenous bone in the form of a wide plate can be used to carry out the spinal bone grafting operation.

When a plate is used to perform bone transplantation, a flat plate is conventionally used. In the case of using a flat plate, the upper bone is pressed by the force of the flat plate pressing the plate to pressurize the nerve, It has been necessary to fix it with a strong fixing means with a hard metal material in order to be able to resist the pressing force.

In the case of conventional flat plate, it is necessary to resist the pressing force in the perpendicular direction by using the tension, which is a very inefficient method and is not effective. That is, since the plate-type plate must be fixed with a strong fixing means during the surgery, the operation time is long and the operation procedure is complicated. In addition, when the plate is made of metal, artifacts arise when CT (computed tomography) or MRI (magnetic resonance imaging) is performed after spinal surgery, Problems have also arisen.

Korea Registered Utility Model 20-0410476

Accordingly, it is an object of the present invention to solve the above-mentioned problems of the conventional art, and it is an object of the present invention to provide a fixing device for a fixing device, which has a convex shape in cross section, And to provide a protective plate for spinal surgery having structural rigidity so as not to be in contact with the nerve.

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other matters not mentioned can be clearly understood by those skilled in the art from the following description.

This object is achieved according to the present invention by a protective plate used for implanting bone or similar bone union materials while protecting the injured vertebrae or neurons exposed to defective portions of the vertebrae removed during surgery, And can be accomplished by a spinal surgery protective plate having a convex shape perpendicular to the longitudinal direction of the vertebrae and being supported and fixed such that the convex ends are not stretched.

Here, the convex ends may be supported and fixed to a structure formed around the vertebrae.

Here, the structure may be a spinal fixation screw used for fixing the spine.

Here, the protection plate may be formed in a mesh structure.

Here, when the protection plate is fixed, it is preferable that a space is formed so that the nerve and the protection plate are not in contact with each other.

Here, the protection plate may be convex in the longitudinal direction of the vertebrae.

Here, when a spinal fixation screw is used, it is preferable that a groove is formed in the protection plate so as to be inserted into the spinal fixation screw.

Here, the attachment plate may be fixed with an additional fixing device such as an additional screw, nail, spike or the like to strengthen the fixation force.

Here, the fixation force can be enhanced by bundling and fixing the spinal fixation screw, the spinal fixation rod, or the adjunct thereof and the protection plate, which are used for fixing the spine using a thread, a wire or a cable.

Here, the protection plate may be formed of a polymer material or a thin metallic material.

Here, if the protection plate is formed of a polymer material, it is preferably formed of a bioabsorbable material.

A reinforcing member for reinforcing the structural rigidity of the protection plate may be formed on one surface or both surfaces of the protection plate in the form of a beam.

Here, the protection plate may be a curved surface curved convexly in a direction perpendicular to the longitudinal direction of the vertebrae.

Here, the protection plate may have a shape in which a cross section in a direction perpendicular to the longitudinal direction of the vertebrae is bent into a convex polygon.

Here, the protective plate may have a convexly curved shape, and may have a concave surface or a flat surface partially.

According to the protection plate for spinal surgery according to the present invention, the plate is formed in a convex shape with its upper end section being convex upward, so that the plate can be strongly resisted by the bone by simply supporting it from the side so as to prevent the plate from spreading It has the advantage of being able to protect the nerves with structural rigidity.

In addition, it is formed in a convex shape so that a space is formed between the nerve and the protection plate, so that the protective plate does not touch the nerve and the neuroprotective effect is excellent.

In addition, since it is supported and fixed by a spinal fixation screw or a spinal fixation rod connected thereto, there is an advantage that it can be stably fixed in a non-fastening manner without a fastening means such as a screw or the like.

In addition, since the structural rigidity according to the shape is excellent, there is an advantage that it can be made of a polymer material rather than a rigid metal material.

In addition, since it can be manufactured using a polymer material, there is an advantage that artifacts do not occur when CT (computed tomography) or MRI (magnetic resonance imaging) is performed after the surgery.

FIG. 1 is a perspective view of a spinal surgery protective plate according to an embodiment of the present invention. FIG.
2 is a perspective view for explaining a concept of fixing a protective plate for spinal surgery according to the present invention.
Fig. 3 is a view showing the protective plate for spinal surgery of Fig. 1 fixed to the vertebra bone.
FIG. 4 is a perspective view showing a protective plate for spinal cord surgery in FIG. 3; FIG.
5 is a perspective view showing a state in which the protection plate and the vertebrae are fixed using screws.
6 is a perspective view of a spinal surgery protective plate according to another embodiment of the present invention.
Fig. 7 is a perspective view showing the protective plate for spinal surgery of Fig. 6 fixed to the vertebra bone.
FIG. 8 is a perspective view of a spinal surgery protective plate in which a reinforcing member is formed on a spinal surgery protective plate of FIG. 6; FIG.
9 is a perspective view of a spinal surgery protective plate according to another embodiment of the present invention.

The details of the embodiments are included in the detailed description and the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the drawings for explaining a protective plate for spinal surgery according to embodiments of the present invention.

FIG. 1 is a perspective view of a protective plate for spinal surgery according to an embodiment of the present invention, FIG. 2 is a perspective view for explaining a concept of fixing a spinal surgery protective plate according to the present invention, FIG. 4 is a perspective view showing a protective plate for spinal cord surgery in FIG. 3, FIG. 5 is a view showing a state in which a protective plate and a vertebra bone are fixed using screws Fig.

The protective plate 100 for protecting the vertebra is to protect the nerve exposed to the defective part of the vertebrae 200 during spinal surgery and protects the defective part of the vertebra 200 so that the nerve is not exposed to the outside. The plate 100 is fixed to cover the upper portion of the protective plate 100, and graft bone grafts or similar bone graft materials taken from the patient's bone are implanted. That is, the protection plate 100 protects the nerve tissue exposed by the bone graft or similar bone-union materials when the implantation process to obtain the bone union is performed while complementing the defective bone.

The protective plate 100 for spinal surgery according to an embodiment of the present invention is characterized in that it has a convexly curved shape in one direction as shown in Fig. At this time, it is possible to have an arcuate shape in which the cross-sectional area is convexly curved in the direction perpendicular to the longitudinal direction of the vertebrae 200 so as to surround the vertebrae 200. Regarding the various shapes of the protective plate for spinal surgery according to the present invention, Will be described later.

In addition, the protective plate 100 can be formed in a mesh structure as shown in Fig. 1, whereby the mesh structure can prevent the implant bone from sliding when the implant bone is implanted in the upper part, And the thickness of the lattice may be adjusted to improve the load-carrying performance.

At this time, the protection plate 100 according to the present invention can be fixed so as to surround the vertebrae 200 without a separate fastening means. Since the shape of the protection plate 100 is convexly curved upwardly, if the protection plate 100 can be supported so as not to be unstretched due to the upward pressing force by the bone graft, .

FIG. 2 is a view showing such a concept, in which the bent ends of the protection plate 100 are supported on the fixture 170 formed on the right and left sides of the convexly curved protection plate 100, It can be stably fixed. A spinal fixation screw 115 or the like used for fixation of a vertebra by a fixture 170 for supporting the protection plate 100 and the like can be used, which will be described later with reference to FIG.

When the protection plate 100 is formed in a flat plate shape, it must be strongly fixed with a rigid material in order to support the load by the upper bone. However, if the cross section of the protection plate 100 has a shape that is arcuate and convexly curved upwardly, if the bent plate 100 is resisted only to a side pushing force in a direction in which the plate 100 is going to expand, it can not be expanded. That is, if the plate can resist only the force to be spread to the side, it can resist the force of pressing the plate 100 by the bone graft structure. As described above, the plate-type plate should be fixed with strong tension in order to resist the pressing force by the implant bone at the upper part. However, the plate 100 in the convex shape as in the present invention is a plate- If the strut is supported, it will be able to resist strongly against the pressing force at the top. This simplifies the surgical procedure and dramatically shortens the operation time.

As shown in Fig. 3, there are many cases where spinal fixation screws 115 are used on both sides during spinal surgery, and the spinal fixation screws 115 can support the protection plate 100 on both sides. More specifically, both ends of the protection plate 100, which is convexly curved upward, are positioned on the neck of the spinal fixation screw 115, so that the protection plate 100 can be supported so as not to spread to the left and right. The protection plate 100 can be easily fixed to the ring portion because the both ends of the convexly curved protective plate 110 come into contact with and supported by the neck of the spinal fixation screw 115 in the direction in which the protection plate 100 is bent.

In addition, in the present invention, as the protection plate 100 is convexly curved upward, a gap is formed between the nerve and the protection plate 100 covered by the protection plate 100 when the protection plate 100 is fixed as shown in FIG. Can be formed. Therefore, the protective plate 100 does not disturb the nerve during spinal surgery, so that the protective effect of the nerve is excellent.

3 shows an example in which the protection plate 110a is supported on the neck immediately below the head of the spinal fixation screw 115. However, in some cases, the spinal fixation screw 115, The protection plate 110a may be supported on the body of the vertebra or may be supported by the vertebra fixing rod 110. [

In order to further strengthen the fixing force when the protection plate 110a is fixed by using the spinal fixation screws 115, the protection plate 100 is provided with the neck of the spinal fixation screws 115 Grooves 105 may be formed at predetermined positions corresponding to the spinal fixation screws 115 at both ends of the protection plate 100 so as to surround it. Therefore, since the groove 105 of the protection plate 110 is inserted and inserted into the neck of the spinal fixation screw 115, the fixing force of the protection plate 110 can be further strengthened.

The protective plate 100 according to an embodiment of the present invention can be made of various metals including titanium or a titanium alloy, but more preferably made of a non-metallic material including a polymer. When metal materials are used, artifacts arise when CT (computed tomography) or MRI (magnetic resonance imaging) is performed after spinal surgery, and it is not possible to precisely control surrounding tissues including nerves However, there is an advantage that such artificial shading does not occur when a non-metallic material is used. More preferably, the protective plate 100 according to the present invention can be formed of a bioabsorbable material such as PCA, PVA, PDS, PLA, PDA, PLDLA.

When formed of a polymer material, it can be easily cut with surgical scissors, so that the protection plate 100 can be cut according to the size of the surgical site during surgery. Therefore, the groove 105 for inserting the neck of the spinal fixation screw 115 may be formed by cutting the scissors with surgical scissors during surgery to fix the protection plate 100 to the surgical site. Of course, the size of the surgical site and the position of the spinal fixation screw 115 can be grasped and customized, and the operation can be performed in advance before the surgery.

3, the protection plate 110a is fixed by supporting the both ends of the protection plate 110a by using the spinal fixing screws 115, but it is also possible to use a separate screw, nail, spike The protector 170 may be fixed to the vertebra bone or the like so as to support both ends of the protection plate 110a to fix the protection plate 110a, 110a may be supported to fix the protection plate 110a.

5, the protection plate 100 is fixed to the vertebrae 200 by using a fastening member 150 such as a screw, a nail, a spike, or the like at predetermined positions on the upper, lower, left, and right edges of the protection plate 100, The fixing force can be further strengthened. However, as described above, in the present invention, since the upwardly curved protective plate 100 can be held and fixed to the neck of the vertebra fixing rod 110 or the vertebra fixing screw 115, 150) need not be used.

Further, though not shown, the protection plate 100 may be fixed to the spinal fixation rod 110 or the spinal fixation screw 115 or its ancillary by using a thread, a wire, a cable, It is possible.

FIG. 6 is a perspective view of a protective plate for spinal surgery according to another embodiment of the present invention, FIG. 7 is a perspective view showing a protective plate for spinal surgery of FIG. 6 fixed to a vertebra bone, FIG. 9 is a perspective view of a spinal surgery protective plate according to another embodiment of the present invention. FIG. 9 is a perspective view of a spinal surgery protective plate in which a reinforcing member is formed on a spinal surgery protective plate.

6, the protection plate 100 is bent so as to be convex in the direction perpendicular to the longitudinal direction of the vertebrae 200 so as to surround the vertebrae 200 as described above, And may be formed so as to bend convexly in the longitudinal direction. That is, the protective plate 100 may have a shape that is curved convexly in the lateral and longitudinal directions, respectively. In this case, it is possible to prevent foreign substances from being introduced into the space formed between the vertebrae 200 and the convex curved protective plate 100 in the longitudinal direction of the vertebra during surgery, and the upper load And the features that can be easily fixed in the non-fastening manner are the same as those described above.

8, a reinforcing member 108 in the form of a beam may be formed on one or both surfaces of the convexly curved protective plate 100. The reinforcing member 108 may be provided with a convexly curved protective plate 100). &Lt; / RTI > In the figure, two reinforcing members 108 are attached in the diagonal direction, and the number and positions of the reinforcing members 108 can be variously modified.

9, the shape of the protection plate 100 according to the present invention is such that a rectangular surface is folded a plurality of in the longitudinal direction of the chracter bone 200 so that the convex cross section has a convex polygonal shape Shape. At this time, a bending groove 106 may be formed on the back surface of the protection plate 100 to facilitate bending. The bending groove 106 bends the protection plate 100 to correspond to the size and shape of the affected part during the operation There is a number. In this case, it is needless to say that the shape of the convex polygon can be variously modified by adjusting the number of the bending grooves 106 and the interval between the bent surfaces. In addition, it can be made in a shape of a convex polygon without the bending grooves 106, so that it can be immediately used during surgery without bending operation.

The shape of the protection plate 100 according to the present invention is not limited to the shapes described with reference to Figs. 1, 6, 8, and 9, and can be variously modified as long as it is curved upward as a whole. In other words, it may be formed so as to have a concave or flat surface partially if it is not in contact with the nerve when it is fixed to the upper part of the nerve, and the interval, shape and thickness of the grid forming the mesh, It can be variously modified depending on the environment of the fixing part where the plate 100 is fixed.

The scope of the present invention is not limited to the above-described embodiments, but may be embodied in various forms of embodiments within the scope of the appended claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims.

100: protective plate 105: groove
106: bending groove 108: reinforcing member
110: spine fixing rod 115: spine fixing screw
150: fastening member 200: vertebra bone

Claims

A protective plate used for implanting bone or bone union materials while protecting the nerves exposed to the injured vertebra bone or the deficient area of the vertebrae removed during surgery,
Wherein the protection plate has a convex shape perpendicular to the longitudinal direction of the vertebrae and is supported and fixed to a structure formed at the outer sides of both ends so as to prevent the convex ends from spreading.

The method according to claim 1,
Wherein the convex ends are supported and fixed to a structure formed around the vertebrae.

3. The method of claim 2,
Wherein the structure is a spinal fixation screw used for spinal fixation.

The method according to claim 1,
Wherein the protective plate is formed in a mesh structure.

The method according to claim 1,
Wherein a space spaced apart from the nerve and the protection plate is formed when the protection plate is fixed.

The method according to claim 1,
Wherein the protective plate is convex in the longitudinal direction of the vertebra.

The method of claim 3,
And a groove is formed in the protection plate so as to be inserted into the spinal fixation screw.

The method according to claim 1,
A protective plate for spinal surgery, wherein the protective plate and the vertebrae are fixed with an additional fixation device of any one of screws, nails, or spikes.

The method according to claim 1,
A spinal fixation screw, a spinal fixation rod, or an accessory for use in fixing the spine using any one of thread, wire or cable, and a protective plate for spinal surgery to which the protection plate is bound and fixed.

The method according to claim 1,
Wherein the protective plate is formed of a polymer material or a metallic material.

11. The method of claim 10,
Wherein the protective plate is formed of a bioabsorbable material when the protective plate is formed of a polymer material.

The method according to claim 1,
Wherein a reinforcing member is formed in a beam shape on one side or both sides of the protection plate.

The method according to claim 1,
Wherein the protection plate has a convex curved surface shape perpendicular to the longitudinal direction of the vertebra.

The method according to claim 1,
Wherein the protection plate has a shape in which a cross section in a direction perpendicular to the longitudinal direction of the vertebra is bent in a convex polygonal shape.

The method according to claim 1,
Wherein the protective plate is a shape that includes a partially concave surface or a flat surface.