WO2015176600A1 - Memory alloy vertebral plate zygopophysis compression fixation hook and method of using same - Google Patents

Abstract

A vertebral plate zygopophysis compression fixation hook for lumbar vertebra fixation consists of an arcuate body, and a vertebral plate hook and a zygopophysis hook respectively arranged at the two ends of the arcuate body; the vertebral plate hook and the zygopophysis hook are C-shaped structures with inward openings; the zygopophysis hook is also provided with anti-slip grippers thereon; the arcuate body is also provided with a lockhole at a position adjacent to the zygopophysis hook; the vertebral plate zygopophysis processus transversus tension hook is made of a shape memory alloy for medical use; at a temperature lower than 4 degrees, the vertebral plate hook and the zygopophysis hook can be stretched and expanded, thus facilitating disposing the vertebral plate hook on the lower edge of the vertebral plate at the inferior centrum of a target intervertebral space, and disposing the zygopophysis hook on the upper edge of the zygopophysis of the superior centrum of the target intervertebral space, or on the upper edge of the root of the processus transversus; at a water temperature higher than the body temperature, utilizing the memory effect of the shape memory alloy can tighten the vertebral plate hook and the zygopophysis hook to effectively fix the vertebral plate hook and the zygopophysis hook to the lower edge of the vertebral plate of the inferior centrum of a standard space, and on the zygopophysis or processus transversus of the superior centrum; in addition, the arcuate body shrinks, and the restoring force thereof applies inward pressure to the neighboring centrum at the target intervertebral space, thus fixing the neighboring segments at the target intervertebral space of the lumbar vertebra.

Description

Memory alloy lamina joint pressure fixed hook and use method thereof Technical field

The present invention relates to the technical field of medical devices, and more particularly to an apparatus and method for stabilizing a spinal vertebral member

Background technique

Damage to other structures of the thoracolumbar intervertebral disc and lumbar vertebrae is an important cause of pain, loss of nerve function and motor function. Intervertebral fusion is currently a basic surgical procedure for the treatment of lumbar disc or lumbar vertebrae. The principle is that the bone grafting and internal fixation are performed between the normal vertebral body and the lower normal vertebral body in the lesion area, so that the bone joints are formed between the segments, so that they are mechanically integrated into one body. Achieve the treatment of spinal lesions, eliminate pain, prevent deformities, rebuild stability and protect spinal nerves. Among them, the interbody fusion cage is the most common intervertebral fusion method. The internal fixation of the vertebral body by the plate screw can limit the relative activity between the fusion vertebral bodies, which can improve the success rate of spinal fusion. However, the internal fixation of the steel plate screw provides sufficient support force and also causes stress shielding, which may lead to adverse effects such as osteolysis and osteoporosis. Moreover, due to the increased fixation of the pedicle screw, it not only greatly increases the trauma of the surgical procedure, but also increases the possibility of postoperative infection and nerve damage; it also greatly increases the difficulty of surgery, prolongs the operation time and the amount of intraoperative blood loss. And bring a heavier financial burden to patients. In addition, due to the limitation of lumbar spine activity, it is easy to cause stiff syndrome, or accelerate the degeneration of adjacent segments, greatly reducing the quality of life of patients, especially young patients.

In view of the deficiencies of the existing pedicle screw fixation methods, the present invention aims to further improve the existing fixation mode, and provides a device for fixing the spinal vertebral members with less risk and more convenient operation, and provides How to use it.

Summary of the invention

It is an object of the present invention to provide a memory alloy laminae articular process fixation hook for use in fixation of the upper and lower vertebrae of a target intervertebral space for intervertebral fusion and methods of use thereof.

Laminar articular process compression hook for lumbar fixation:

A, the lamina joint compression fixed hook 1 comprises an arcuate body 11, a lamina hook 12 and an articular hook 13;

B. The lamina hook 12 and the articular hook 13 are located at both ends of the arcuate body 11;

C. The lamina joint pressure fixing hook 1 is made of a medical memory alloy;

D. The lamina hook 12 is located at the lower edge 41-1 of the lamina 41 of the lower vertebral body 4 of the target intervertebral space 3, and the articular process hook 13 is located at the root of the articular process 51 of the upper vertebral body 5 of the target intervertebral space 3 The upper edge 51-1 or the root upper edge 52-1 of the transverse process 52.

Further, the articular hook 13 has a curvature that matches the outer surface of the articular process 51 or the transverse process 52. Since the articular process lateral spur 13 has a curvature matching the outer surface of the articular process 51 or the transverse process 52, when the articular process hook 13 is placed into the articular process 51 of the upper vertebral body 5 of the target intervertebral space or transverse When the protrusion 52 is formed, it can be well matched with the surface of the articular process 51 or the transverse process 52, and is not easily detached from the articular process 51 or the transverse process 52, and the adjacent vertebral body of the target intervertebral space can be better fixed.

The opening of the lamina hook 12 and the articular hook 13 are inwardly opposed. Since the openings of the lamina hook 12 and the articular hook 13 are designed to be inwardly opposite, when the lamina hook 12 is located at the lower edge 41-1 of the lamina 41 of the lower vertebra 4 of the target intervertebral space, When the articular hook 13 is located at the upper edge 51-1 of the root of the articular process 51 of the upper vertebral body 5 of the target intervertebral space or the upper edge 52-1 of the root of the transverse process 52, the vertebral hook designed to open inward 12 and the articular hook 13 can exert an inward pressure on the target cone to achieve pressure fixation of the adjacent vertebral body of the target gap.

The lamina hook 12 is a C-shaped hook structure having a smooth surface. Since the lamina hook 12 is a C-shaped hook structure, Thus, when the lamina hook 12 is placed in the lower edge 41-1 of the lamina 41 of the lower vertebra 4 of the target intervertebral space 3, the lamina 41 of the lower vertebra 4 can be easily hooked. Moreover, since the lamina hook 12 has a smooth surface, accidental damage to human tissue due to surface burrs is effectively avoided when the lower edge of the lamina 41 is placed.

The articular hook 13 is a C-shaped hook.

Further, the inner surface of the articular hook 13 may be provided with an anti-slip ratchet 13-1 or a smooth surface 13-2. Since the articular process hook 13 is located at the upper edge 51-1 of the root of the articular process 51 of the upper vertebral body 5 of the target intervertebral space or the upper edge 52-1 of the root of the transverse process 52, the articular process 51 or the transverse process 52 The size is small, and therefore, the articular hook 13 may come off when it is hooked at the root portion 51-1 of the joint protrusion 51 or the root portion 52-1 of the transverse process 52. Therefore, in the present invention, the surface of the articular process hook 13 is also provided with an anti-slip ratchet 13-1 for better hooking the articular process hook 13 to the upper surface of the articular process 51 or the transverse process 52. The articular process transverse hook 13 is effectively prevented from falling off the articular process 51 or the transverse process 52.

The main body 11 is further provided with a locking hole 11-1 to facilitate locking. In order to prevent the lamina joint tension hook 1 from accidentally falling off the target cone during use, a locking hole 11-1 is further provided on the main body 11, and the lamina joint is passed through the locking hole 11-1. The transverse transverse tension hook 1 is locked to prevent the laminar articular process transverse tension hook 1 from falling off the target cone.

In use, the laminar articular compression hook 1 is placed in ice water below 4 degrees, the lamina hook 12 and the articular hook 13 are opened, and the lamina hook 12 is placed in the target intervertebral space 3 The lower vertebral lamina 41 of the lower vertebral body 4 is placed in the upper edge 51-1-1 or the transverse process 52 of the root 51-1 of the articular process 51 of the superior vertebral body 5 of the target intervertebral space 3 The upper edge 52-1-1 of the root portion 52-1, after warming up, uses the restoring force of the memory alloy to tighten the lamina hook 12 and the articular hook 13 to complete the fixation of adjacent segments of the lumbar vertebra target intervertebral space.

Since the laminae articular compression hook 1 is made of a medical shape memory alloy, the laminar hook 12 and the articular process transverse hook 13 are enlarged and expanded at a low temperature by the memory effect of the shape memory alloy. Open, you can easily The lamina hook 12 is placed in the lower edge 41 of the lower vertebral body 4 of the target intervertebral space 3, and the transverse protrusion 13 of the articular process is placed in the upper edge of the root of the articular process 51 of the upper vertebral body 5 of the target intervertebral space. 51-1 or the upper edge 52-1 of the root of the transverse process 52; and at a high temperature, 40 ° C warm water can be used during normal use, the shape memory alloy shrinks, and the shrinkage force of the shape memory alloy can be used to tighten The lamina hook 12 and the articular hook 13 effectively secure the lamina hook 12 and the articular hook 13 to the lower lamina 41 and the facet 51 or the transverse process 52, while the arcuate body 11 Shrinking, applying an inward pressure to the target cone to achieve the purpose of fixing the adjacent segments of the lumbar intervertebral target intervertebral space.

The laminae articular compression hook for lumbar fixation of the present invention is composed of an arcuate body 11 and a lamina hook 12 and an articular process transverse hook 13 which are arranged at both ends of the arcuate body 11. The lamina hook 12 and the articular process transverse hook 13 are open-inward C-shaped structures, and the anti-spindle teeth 13-1 may also be provided on the articular process transverse hooks 13. The laminae articular compression hook 1 is made of a medical shape memory alloy. At low temperature, the lamina hook 12 and the articular hook 13 are enlarged and expanded, and the lamina hook 12 can be conveniently placed into the lower edge 41 of the lower vertebral body 4 of the target intervertebral space 3, The articular process hook 13 is placed in the upper edge 51-1 of the root of the articular process 51 of the upper vertebra 5 of the target intervertebral space 3 or the upper edge 52-1 of the root of the transverse process 52. At 40 degrees water temperature, shape memory is utilized. The memory effect of the alloy can tighten the lamina hook 12 and the articular hook 13 to effectively secure the lamina hook 12 and the articular hook 13 to the lower edge 41 of the lamina and the facet 51 or On the transverse process 52, while the arcuate body 11 is contracted, an inward pressure is applied to the target cone to achieve the purpose of securing the adjacent segment of the target intervertebral space 3 of the lumbar spine.

DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective structural view of a laminar articular process fixation hook for lumbar spine fixation under normal state and at a high temperature.

Figure 1-1 is a front view of Figure 1.

Figure 1-2 is a plan view of Figure 1.

Fig. 2 is a perspective structural view showing a laminar articular process fixation hook for lumbar fixation of the present invention when it is expanded at a low temperature.

Figure 2-1 is a front view of Figure 2.

2-2 is a top view of FIG. 2.

Fig. 3 is a view showing the isomeric stereostructure of the laminar articular process fixation hook for lumbar fixation of the present invention. 3-1 shows that the main body 11 is provided with a locking hole 11-1, but the inner surface of the articular protruding hook 13 has no anti-slip ratchet 13-1 and is a smooth surface 13-2; FIG. 3-2 is not provided on the main body 11. The lock hole 11-1, but the inner surface of the joint hook 13 is provided with the anti-slip ratchet 13-1; FIG. 3-3 shows that the main body 11 is not provided with the lock hole 11-1, and the inner surface of the joint hook 13 is also free from the anti-slip The tooth 13-1 is a smooth surface 13-2, which is the simplest structural laminar articular compression hook.

Fig. 4 is a schematic view showing the operation of the lower edge of the lamina and the superior edge of the superior vertebral body in the lower vertebral body of the target intervertebral space under the open state of the laminar articular process of the present invention.

Fig. 5 is a schematic view showing the operation of the lower edge of the lamina and the superior edge of the superior vertebral body in the lower vertebral body of the target intervertebral space after the laminae articular compression hook of the present invention is tightened at a high temperature.

Fig. 6 is a schematic view showing the operation of the lower edge of the vertebral body and the upper edge of the transverse vertebral body of the upper vertebral body in the open state of the vertebral body of the target intervertebral space under the condition that the laminar articular process of the present invention is opened at a low temperature.

Fig. 7 is a view showing the operation of the lower edge of the transverse vertebral body and the upper edge of the transverse vertebral body of the upper vertebral body after the vertebral plate articular pressure fixing hook of the present invention is tightened at a high temperature.

In the above picture:

1 is a laminar articular process fixation lug for lumbar fixation, 2 is ice water, 3 is the target intervertebral space, and 4 is the lower vertebra. 5 is the upper cone;

11 is a bow-shaped body, 12 is a lamina hook, 13 is a joint hook, 41 is the lower edge of the lamina, 51 is an articular process, and 52 is a transverse process;

11-1 is a keyhole, 13-1 is an anti-slip ratchet provided on the inner surface of the joint protrusion transverse hook, and 13-2 is an anti-slip ratchet inner surface of the joint protrusion transversely protruding hook;

51-1 is the upper edge of the articular process, and 52-1 is the upper edge of the root of the transverse process.

detailed description

Example 1: Laminar articular process compression anchor for lumbar fixation of the present invention for articular process fixation

Referring to Figures 1 to 2-2, a laminar articular compression hook for lumbar fixation, comprising an arcuate body 11, a lamina hook 12 and an articular hook 13, said lamina hook 12 and an articular hook 13 Located at both ends of the arcuate body 11. The lamina hook 12 can be placed in the lower edge 41-1 of the lamina 41 of the lower vertebra 4 of the target intervertebral space 3, and the articular hook 13 can be placed in the axon 51 of the upper vertebra 5 of the target intervertebral space 3 The upper edge of the root is 51-1. The laminar articular hook 1 is made of a medical memory alloy.

Further, the articular hook 13 has a curvature that matches the outer surface of the articular process 51. Since the articular process hook 13 has a curvature matching the outer surface of the articular process 51, when the articular process hook 13 is placed in the upper part of the articular process 51 of the upper vertebral body 5 of the target intervertebral space, the articular process 51 can be used. The surface is well matched, and the inner surface is provided with the anti-slip ratchet 13-1 which is not easily detached from the joint protrusion 51, and the cone of the target intervertebral space can be better fixed.

The lamina hook 12 and the articular hook 13 have a C-shaped hook structure that is open inwardly opposite. Since the opening of the lamina hook 12 and the articular hook 13 adopts an inwardly opposed C-shaped hook structure design, when the lamina hook 12 is located at the lower edge of the lamina 41 of the lower vertebra 4 of the target intervertebral space 41-1, when the articular process hook 13 is located at the upper edge 51-1 of the root of the articular process 51 of the upper vertebral body 5 of the target intervertebral space, the target cone can be conveniently hooked, and the opening is designed inwardly. The lamina hook 12 and the articular hook 13 can exert an inward pressure on the target cone to effect fixation of the target cone.

The lamina hook 12 and the articular hook 13 have a smooth surface, and therefore, when the lamina hook 12 is located at the lower edge 41-1 of the lamina 41 of the lower vertebral body 4 of the target intervertebral space, the articular hook 13 When the upper edge 51-1-1 of the root portion 51-1 of the articular process 51 of the upper vertebra 5 of the target intervertebral space is located, the accidental damage to the human tissue due to the surface burr is effectively avoided.

In use, the laminar articular process lateral hook 1 is placed in ice water, the lamina hook 12 and the articular hook 13 are opened, and the lamina hook 12 is placed in the lower vertebra 4 of the target intervertebral space 3 The lower edge of the lamina 41, the articular process hook 13 is placed in the upper edge 51-1 of the articular process 51 of the upper vertebral body 5 of the target intervertebral space 3, with reference to Fig. 4. After rewarming at 40 ° C warm water, using a memory alloy The restoring force tightens the lamina hook 12 and the articular process lateral hook 13 to effectively fix the lamina hook 12 and the articular hook 13 on the lower lamina 41 and the articular process 51, and the articular process hook 13 The anti-slip ratchet 13-1 of the inner surface can better prevent the joint hook 13 from falling off the joint protrusion 51, and if necessary, the joint can be screwed through the lock hole 11-1 on the arcuate body 11 The projection 51 is locked while the arcuate body 11 is contracted to apply an inward pressure to the target cone to achieve the purpose of securing the adjacent segment of the lumbar intervertebral target intervertebral space 3. Refer to Figure 5.

Example 2: The lamina joint pressure fixing hook of the present invention for transverse fixation

6 and 7, the present embodiment differs from the first embodiment in that the fixed portion of the upper cone 5 in the fixed object of the laminar articular compression hook of the present invention is the root of the transverse process 52. Upper edge 52-1.

In use, the laminar articular process lateral hook 1 is placed in the ice water 2, the lamina hook 12 and the articular hook 13 are opened, and the lamina hook 12 is placed in the lower intervertebral space of the target intervertebral space 3 4, the lower edge 41 of the lamina, the articular process hook 13 is placed in the upper edge 52-1-1 of the root 52-1 of the transverse process 52 of the upper vertebral body 5 of the target intervertebral space 3, see Fig. 6. 40 ° C warm water After rewarming, the lamina hook 12 and the articular hook 13 are tightened by the restoring force of the memory alloy, and the lamina hook 12 and the articular hook 13 are effectively fixed to the lower edge 41 and the transverse process 52 of the lamina. The anti-slip ratchet 13-1 of the inner surface of the articular hook 13 can better prevent the articular hook 13 from falling off from the joint protrusion 51, and if necessary, can pass the lock on the arcuate body 11 by screws. The hole 11-1 locks the articular process 51 while the arcuate body 11 contracts, applying an inward pressure to the target cone to achieve For the purpose of fixing the lumbar vertebra target intervertebral space 3 adjacent segments, refer to Figure 7.

It should be noted that the structures disclosed and illustrated herein may be replaced by other structures having the same effect, such as the isomers having the same effect as described in FIG. At the same time, the embodiments described in the present invention are not the only structures that implement the present invention. While the preferred embodiments of the present invention have been shown and described herein, it will be understood by those skilled in the art that Instead, the scope of the invention is to be defined by the spirit and scope of the appended claims.

Claims (6)

A laminar articular process compression hook for lumbar fixation, characterized in that: A, the lamina joint compression fixed hook (1) comprises an arched body (11) lamina hook (12) and an articular hook (13); B. The lamina hook (12) and the articular hook (13) are located at both ends of the arcuate body (11); C. The arcuate body (11) proximal joint hook (13) may be provided with a locking hole (11-1) to facilitate locking. D, the articular hook (13) may be provided with anti-slip ratchets (13-1); E. The lamina joint pressure fixing hook (1) is made of a medical memory alloy; F. The lamina hook (12) is located at the lower edge (41-1) of the lamina (41) of the lower vertebral body (4) of the target intervertebral space (3), and the articular hook (13) is located at the target vertebra The gap (3) is the upper edge (51-1) of the root of the articular process (51) of the upper vertebral body (5) or the upper edge (52-1) of the root of the transverse process (52). The laminae articular compression hook according to claim 1, wherein the opening of the lamina hook (12) and the articular hook (13) are inwardly opposed. The laminae articular compression hook according to claim 1, wherein said lamina hook (12) is a C-shaped hook structure having a smooth surface. The laminae articular compression hook according to claim 1, wherein said articular hook (13) is a C-shaped hook having a matching surface of said articular process (51) or transverse process (52). The curvature. The inner surface may be provided with a non-slip ratchet (13-1) or a smooth surface (13-2). The laminae articular compression fixing hook according to claim 1, wherein the main body (11) is provided with a locking hole (11-1) for locking or not (11). -2). The laminae articular compression hook according to claim 1, wherein said lamina is used in use The articular process compression hook (1) is placed in ice water below 4 degrees, the lamina hook (12) and the articular hook (13) are opened, and the lamina hook (12) is placed into the target intervertebral space. (3) The lower edge of the lamina (41-1) of the lower vertebral body (4), the articular process hook (13) is placed in the target intervertebral space (3) of the superior vertebral body (5) of the articular process (51) The upper edge (51-1) of the root or the upper edge (52-1) of the root of the transverse process (52), after warming up, tightens the vertebral hook (12) and the transverse process of the articular process using the restoring force of the memory alloy Hook (13), complete the fixation between the lumbar vertebrae intervertebral space (3) adjacent segmental vertebral bodies (4) (5).

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