WO2018084597A1

WO2018084597A1 - Protection plate for spinal surgery

Info

Publication number: WO2018084597A1
Application number: PCT/KR2017/012327
Authority: WO
Inventors: 염진섭; 김남국; 최승현
Original assignee: 서울대학교병원; 재단법인 아산사회복지재단; 울산대학교 산학협력단
Priority date: 2016-11-04
Filing date: 2017-11-02
Publication date: 2018-05-11
Also published as: KR20180050456A; KR101866378B1

Abstract

The present invention relates to a protection plate for spinal surgery. The protection plate for spinal surgery according to the present invention is used to protect nerves exposed from a damaged vertebra or the missing part of a vertebra removed during surgery and transplant a bone or bone fusion materials similar thereto, wherein the protection plate has a convex shape in a direction vertical to the lengthwise direction of a vertebra and is supported and fixed such that the convex ends thereof do not unfold.

Description

Protective plate for spinal surgery

The present invention relates to a protective plate for spinal surgery, and more particularly, a sufficient amount of bone or the same while protecting the nerves exposed in the damaged or removed bone defects when the vertebrae are damaged or partly removed during spinal surgery. A spinal surgical protective plate used to implant similar bone union materials.

When the vertebrae are damaged by trauma or tumors, or some of the vertebrae are removed during spinal surgery, the nerves in the vertebrae are exposed to the outside. In this case, the bone or similar materials for bone fusion are implanted for the reconstruction and fusion of the bone, which should be done while protecting the nerves exposed to the outside.

Conventionally, vertebral bone graft surgery protects nerves by fixing a wide plate-shaped autogenous bone obtained from the hip bone of a patient to a structure such as a spinal rod, using a binding means such as thread or wire, and protecting the nerve. The implantation process was performed by additional implantation of bone grafts (BG) from the patient's hip bone.

However, the process of collecting and processing the autologous bone is complicated, and if the defect is large, there may be a problem in that the autologous bone of a sufficient size (a wide-bone autologous bone) cannot be secured. In this case, a vertebral bone graft can be performed using a plate that replaces an autologous bone in the form of a wide plate.

When a spinal graft is performed using a plate, a plate in the form of a plate is conventionally used. In the case of using a plate, the plate of the upper graft is pressed by the force of the plate to press the plate to compress the nerves, thereby causing pain or paralysis. Since it could be caused, it was necessary to fix it by a strong fixing means made of hard metal so as to resist the pressing force.

In the case of conventional flat plates, tension must be used to resist the pressing force in the orthogonal direction, which is a very inefficient method and does not work well. That is, because the plate-type plate to be fixed by a strong fixing means during the operation, the operation takes a lot of time and the problem that the operation process is complicated. In addition, when the plate is made of a metal material, artificial shade occurs during computed tomography (CT) or magnetic resonance imaging (MRI) after spinal surgery, which makes it impossible to accurately observe tissues around the metal including nerves. Problems also occurred.

Accordingly, an object of the present invention is to solve such a conventional problem, the cross section has a convex shape, can be fixed to be supported on the fixture so that both convex ends do not open, it is easy to install in a non-fastening manner and the plate is It is to provide a protective plate for spinal surgery having a structural rigidity so as not to contact the nerve.

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

The object is, in accordance with the present invention, a protective plate used for implanting bone or similar bone fusion materials while protecting nerves exposed to damaged vertebrae or defects of vertebrae that have been removed during surgery, wherein the protective plate comprises It can be achieved by a protective plate for spinal surgery having a convex shape in a direction perpendicular to the longitudinal direction of the vertebrae, which is supported and fixed so that both convex ends are not extended.

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

In this case, the structure may be a spinal screw used to fix the spine.

Here, the protective plate is preferably formed in a mesh structure.

Here, when the protective plate is fixed, it is preferable that spaces are formed so that the nerve and the protective plate do not contact.

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

Here, when the spinal fixing screw is used, it is preferable that a groove is formed in the protective plate to be inserted into the spinal fixing screw.

In this case, the fixing plate and the vertebrae may be fixed by additional fixing devices such as additional screws, nails, spikes, and the like, thereby increasing the fixing force.

Here, by using a thread, wire (wire) or cable, etc., the fixation force can be strengthened by binding and fixing the spinal fixation screw, the spinal fixation rod or its accessories and the protective plate to be used.

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

Here, when the protective plate is formed of a polymer material, it is preferable that the protective plate is formed of a bioabsorbable material.

Here, one or both surfaces of the protective plate may be formed with a reinforcing member for enhancing the structural rigidity of the protective plate in the form of a beam.

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

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

Here, the protective plate has a convexly curved shape as a whole, but may be a shape including a concave surface or a flat surface.

According to the protective plate for spinal surgery of the present invention as described above, the plate is formed into a convex shape upward in the cross section, so that it can strongly resist the load caused by the bone graft simply by supporting it from the side to prevent the plate from spreading. The structural rigidity has the advantage of protecting the nerves.

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

In addition, it is also supported by the spinal fixing screw or the spinal fixing rod connected thereto to fix it, there is an advantage that can be stably fixed in a fastening manner without a fastening means such as screws.

In addition, because of the excellent structural rigidity according to the shape there is an advantage that can be manufactured from a polymer material rather than a hard metal material.

In addition, since it can be manufactured using a polymer material, an artificial shade does not occur during CT (computed tomography) or MRI (magnetic resonance imaging) imaging after surgery.

1 is a perspective view of a protective plate for spinal surgery according to an embodiment of the present invention.

Figure 2 is a perspective view for explaining the concept that the protection plate for spinal surgery in accordance with the present invention.

3 is a view showing a state in which the protective plate for spinal surgery of Figure 1 is fixed to the vertebrae.

Figure 4 is a perspective view of the spinal cord surgical plate is separated in FIG.

5 is a perspective view showing a state in which the protective plate and the vertebrae are fixed by using a screw.

Figure 6 is a perspective view of a protective plate for spinal surgery according to another embodiment of the present invention.

7 is a perspective view illustrating a state in which the protection plate for spinal surgery of FIG. 6 is fixed to the vertebrae.

FIG. 8 is a perspective view of a protection plate for spinal surgery in which a reinforcing member is formed on the protection plate for spinal surgery in FIG. 6.

9 is a perspective view of a protective plate for spinal surgery according to another embodiment of the present invention.

Details of the embodiments are included in the detailed description and drawings.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and only the embodiments make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, the present invention will be described with reference to the drawings for describing the protection plate for spinal surgery by embodiments of the present invention.

1 is a perspective view of a protective plate for spinal surgery according to an embodiment of the present invention, Figure 2 is a perspective view for explaining the concept that the protective plate for spinal surgery in accordance with the present invention, Figure 3 is the spine of Figure 1 The surgical protection plate is a view showing a state fixed to the vertebrae, Figure 4 is a perspective view of the spinal cord surgical protection plate is separated in Figure 3, Figure 5 is a view of fixing the protective plate and the vertebrae using a screw It is a perspective view showing.

Protective plate 100 for spinal surgery to be described below is to protect the nerves exposed to the defects of the vertebrae 200 during spine surgery, and protects the defects of the vertebrae 200 so that the nerves are not exposed to the outside. It is fixed to cover using the plate 100, the bone fragments or similar bone fusion material taken from the bone of the patient is implanted on the upper portion of the protective plate 100. That is, the protection plate 100 serves to protect the nerve tissue exposed by the bone graft or similar materials for bone union when performing the implantation process to obtain bone union while complementing the missing bone.

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, the cross-section is convexly curved in the direction perpendicular to the longitudinal direction of the vertebrae 200 to surround the vertebrae 200, but with respect to the various shapes of the spinal surgery protection plate according to the present invention It will be described later.

In addition, the protective plate 100 may be formed in a mesh structure, as shown in Figure 1, by the mesh structure can prevent the graft bone to slide and move when the graft bone is implanted thereon, the grating The load-bearing performance can be improved by adjusting the spacing between them and the thickness of the lattice.

At this time, the protection plate 100 according to the present invention can be fixed to surround the vertebrae 200 in a non-fastening manner without a separate fastening means. Since the shape of the protective plate 100 is convex upwardly convex, if the protective plate 100 can be supported so as not to be unfolded by a load pressed from above by the graft bone, the protective plate 100 is a defective portion of the vertebrae 200. Can be fixed at

FIG. 2 is a diagram illustrating this concept, by which both ends of the protection plate 100 are supported by the fixtures 170 formed on the left and right sides of the convexly curved protection plate 100 so that the protection plate 100 is additionally fastened. It can be fixed stably without. As a fixture 170 supporting the protective plate 100, a spinal screw 115, which is used for fixing the spine, may be used, which will be described later with reference to FIG. 3.

When the protective plate 100 is formed in a flat shape, it must be strongly fixed with a hard material to support the load by the upper graft bone. However, if the cross section, such as the protective plate 100 of the present invention has a curved shape convex upward convex, the curved plate 100 will not be able to be unfolded if it only resists the force pushing to the side in the direction to be unfolded. That is, if it can only resist the force to be extended to the side can be structurally strong resistance to the force pressing the plate 100 by the graft. As described above, the flat plate must be fixed with a strong tension to resist the force pushed by the graft bone from the top, but as in the present invention, the convex plate 100 is sufficiently resistant to the pushing force to the side. If you have a crutch, you will be able to resist the pressing force from the top. This simplifies the surgical process and dramatically shortens the operation time.

As shown in FIG. 3, during spinal surgery, spinal fixation screws 115 are often used on both sides, and the spinal fixation screws 115 may support the protective plate 100 on both sides. In more detail, both ends of the protective plate 100 which is bent upwardly convex in the neck of the spinal fixing screw 115 may be positioned so that the protective plate 100 may not be extended from side to side. Since both ends of the protective plate 110, which are convex and curved upward, are supported by contact with a neck of the spinal fixing screw 115, the protective plate 100 can be easily fixed to the affected part.

In addition, according to the present invention, as the protective plate 100 is bent upwardly convex, a space spaced between the protective plate 100 and the nerve covered by the protective plate 100 when the protective plate 100 is fixed as shown in FIG. 3. This can be formed. Therefore, the protective plate 100 does not touch the nerve during spinal surgery, so the protective effect of the nerve is excellent.

3 illustrates an example in which the protection plate 110a is supported by a neck directly below the head of the spinal screw 115, but in some cases, the spinal screw 115 is located at a lower portion thereof. The protection plate 110a may be supported by the body portion of the body, or may be supported by the rod for fixing the spine 110, of course.

When fixing the protective plate 110a by using the spinal screw 115, the neck of the spinal screw 115 is attached to the protective plate 100 as shown in FIG. The groove 105 may be formed at a predetermined position corresponding to the spinal screw 115 at both ends of the protective plate 100 so as to surround the protective plate 100. Therefore, since the groove 105 of the protective plate 110 is inserted into and inserted into the neck of the spinal screw 115, the fixing force of the protective plate 110 can be further strengthened.

The protective plate 100 according to the embodiment of the present invention may be made of various metals including titanium or titanium alloy, but more preferably, may be made of a nonmetal material including a polymer. When using metal materials, artificial tones may occur during computed tomography (MRI) or magnetic resonance imaging (MRI) after spinal surgery, resulting in inability to accurately control nerves and surrounding tissues. There is an advantage that such artificial shading does not occur when using a non-metallic material. More preferably, the protective plate 100 according to the present invention may be formed of a bioabsorbable material such as PCA, PVA, PDS, PLA, PDA, PLDLA.

When formed of a polymer material can be easily cut with a surgical scissors, it is possible to cut the protective plate 100 according to the size of the surgical site during surgery. Therefore, when fixing the aforementioned protective plate 100 to the surgical site, the groove 105 for inserting the neck of the spinal screw 115 may be formed by cutting with surgical scissors during surgery. Of course, by grasping the size of the surgical site and the position of the spinal fixing screw 115 may be manufactured in advance before the operation by tailoring the operation.

In the description with reference to FIG. 3, the fixing plate 110a is fixed by supporting both ends of the protection plate 110a using the spinal fixing screw 115, but a separate screw, nail, and spike are described. It is also possible to fix the protection plate (110a) by fixing the fixing device 170, such as back to the vertebrae to support both ends of the protection plate (110a) using this, protruding portion of the bone formed around the protection plate ( The protection plate 110a may be fixed by supporting both ends of the 110a.

In addition, as shown in FIG. 5, the protection plate 100 is connected to the vertebrae 200 using fastening members 150 such as screws, nails, spikes, and the like at predetermined positions of upper, lower, left, and right edges of the protection plate 100. The fixing force can be further strengthened by fixing directly to However, in the present invention, as described above, since the protection plate 100 bent upwardly convex can be supported by being fixed to the neck of the spinal rod 110 or the spinal screw 115, it is necessary to use a separate fastening member ( There is no need to use 150).

Furthermore, although not shown, the protection plate 100 may be tied to and secured to the spinal rod 110 or the spinal screw 115 or an accessory using a thread, a wire, a cable, or the like to further strengthen the fixing force. It may be.

Figure 6 is a perspective view of a protective plate for spinal surgery according to another embodiment of the present invention, Figure 7 is a perspective view showing a state in which the protective plate for spinal surgery of Figure 6 fixed to the vertebrae, Figure 8 is Figure 6 Is a perspective view of a spinal surgery protective plate formed with a reinforcing member on the protective plate for spinal surgery, Figure 9 is a perspective view of a protective plate for spinal surgery according to another embodiment of the present invention.

As shown in FIG. 6, the protective plate 100 is convexly curved in a direction perpendicular to the longitudinal direction of the vertebrae 200 to surround the vertebrae 200 as described above, and at the same time, It may be formed to be convexly curved in the longitudinal direction. That is, the rectangular protective plate 100 may be convexly curved in the horizontal and vertical directions, respectively. In this case, the space formed between the vertebrae 200 and the convex protection plate 100 in the longitudinal direction of the spine can prevent foreign substances from entering during surgery, and the upper load as the convex upwards. Features that can strongly support and features that can be easily fixed in a non-fastening manner are the same as the above.

In addition, as shown in FIG. 8, a beam-shaped reinforcing member 108 may be formed on one side or both sides of the convexly curved protective plate 100, and the protective plate curved convexly by the reinforcing member 108 ( The structural rigidity of 100 can be further enhanced. The drawing shows that two reinforcing members 108 are added in a diagonal direction, and the number and positions of the reinforcing members 108 may be variously modified.

In addition, the shape of the protective plate 100 according to the present invention is a plurality of bent in the longitudinal direction of the vertebral bone 200 in the shape of a square so that the convex cross-section is convex polygon shape as shown in Figure 9 It may be a shape. In this case, a bending groove 106 may be formed on the rear surface of the protection plate 100 to facilitate bending, and the protection plate 100 may be bent to correspond to the size and shape of the affected part during surgery by the bending groove 106. There is a number. At this time, the shape of the convex polygon can be variously modified by adjusting the number of bending grooves 106 and the interval between the bent surfaces. In addition, without the bending groove 106 may be made first in the shape of a convex polygon can be used immediately during surgery without bending work.

The shape of the protection plate 100 according to the present invention is not limited to the shape described with reference to FIGS. 1, 6, 8, and 9, and may be variously modified as long as the shape is curved upwardly convexly. That is, when fixed to the upper part of the nerve, if not in contact with the nerve may be formed to have a partially concave or flat surface, as described above, the spacing, shape and thickness of the grid forming the mesh also affected the condition, protection The plate 100 may be modified in various ways depending on the environment of the fixing portion to which the plate 100 is fixed.

The scope of the present invention is not limited to the above-described embodiment, but may be embodied in various forms of embodiments within the scope of the appended claims. Without departing from the gist of the invention claimed in the claims, it is intended that any person skilled in the art to which the present invention pertains falls within the scope of the claims described in the present invention to various extents which can be modified.

Claims

A protective plate used for implanting bone or similar bone fusion materials while protecting nerves exposed to damaged vertebrae or defects in vertebrae that are removed during surgery,

The protective plate has a convex shape in the direction perpendicular to the longitudinal direction of the vertebrae, spinal surgery protective plate is fixed and supported so as not to extend both convex ends.
The method of claim 1,

Both convex ends are supported on the structure formed around the vertebra spine surgery protective plate.
The method of claim 2,

The structure is a spinal surgical protective plate that is used to fix the spinal screw.
The method of claim 1,

The protective plate is a protective plate for spinal surgery is formed in a mesh structure.
The method of claim 1,

When the protective plate is fixed, the protective plate for spinal surgery is formed spaced apart so that the nerve and the protective plate does not contact.
The method of claim 1,

The protective plate is a protective plate for spinal surgery that is convex in the longitudinal direction of the vertebrae.
The method of claim 3, wherein

A protective plate for spinal surgery, the groove is formed in the protective plate to be inserted into the spinal fixing screw.
The method of claim 1,

A protective plate for spinal surgery for fixing the protective plate and the vertebrae by an additional fixing device of any one of screws, nails or spikes to strengthen the fixing force.
The method of claim 1,

Spinal surgical protective plate for tightening the spine fixing screw, spinal fixing rod, or its attachment to the spinal fixation using any one of a thread, a wire or a cable and the attachment plate to secure the fixing force.
The method of claim 1,

The protective plate is a protective plate for spinal surgery is formed of a polymer material or a thin metallic material.
The method of claim 10,

When the protective plate is formed of a polymer material spinal surgery protective plate formed of a bioabsorbable material (bioabsorbable material).
The method of claim 1,

One side or both sides of the protective plate is a spinal surgery protective plate formed with a reinforcing member for strengthening the structural rigidity of the protective plate in the form of a beam.
The method of claim 1,

The protective plate is a spinal surgical protective plate of the shape of a curved surface convexly curved in a direction perpendicular to the longitudinal direction of the vertebrae.
The method of claim 1,

The protective plate is a spinal surgical protective plate of the cross-section in the direction perpendicular to the longitudinal direction of the vertebrae bent in a convex polygonal shape.
The method of claim 1,

The protective plate has a convex shape as a whole, a partially protective plate for spinal surgery comprising a concave or flat surface.