CN219021765U - Melt board nail stick system - Google Patents

Abstract

The utility model discloses a fusion plate nail rod system, which belongs to the technical field of orthopedic implants, and comprises a fusion plate and a connecting rod, wherein the fusion plate comprises an upper fixing plate, a vertebral plate door opening supporting plate and a lower fixing plate which are sequentially connected, a first nail hole is formed in the upper fixing plate, and a first vertebral plate screw used for being fixed to an upper vertebral plate at a vertebral plate door opening position is arranged in the first nail hole; the lower fixing plate is provided with a second nail hole, a second vertebral plate screw used for being fixed to the lower vertebral plate at the position of the vertebral plate door opening is arranged in the second nail hole, and the axis of the second nail hole is inclined towards the direction of the upper fixing plate; the second vertebral plate screw comprises a screw seat and a screw body, and a rod accommodating groove for accommodating the connecting rod is formed in the screw seat. The fusion plate nail rod system can maintain the fixed position of the spine structure in the operation, realizes immediate stability, can effectively prevent the door from being closed again or the door opening angle from being reduced after the operation, can realize the door opening fusion and the orthopedic function of the vertebral body at the same time, and has good firmness.

Description

Melt board nail stick system

Technical Field

The utility model relates to the technical field of orthopedic implants, in particular to a fusion plate nail rod system.

Background

Posterior single-door spinal canal expansion and shaping of cervical vertebrae is a main method for treating multi-level spinal cord type spondylopathy, cervical canal stenosis, multi-level posterior longitudinal ligament ossification, which is to cut one side of a vertebral plate through a surgical operation and implant a micro-door titanium plate to shift the vertebral plate to the rear and outer sides to expand the spinal canal. The miniature door-opening titanium plate forms a stable bridging structure between the lifted vertebral plate and the ipsilateral side block, can form a real rigid support at the door-opening side, maintains the post-operation spine structure to be fixed at the position during operation, and realizes immediate stability. The miniature door-opening titanium plate not only can effectively prevent the door from being closed again after operation or the door opening angle from being reduced, but also can improve the stability of the door shaft side, is favorable to the bone healing of the door shaft side, and prevents the physiological curvature of the cervical vertebra from being further lost.

The inventor finds that the mini-type door-opening titanium plate in the prior art cannot realize the door-opening fusion and the orthopedic function of the vertebral body at the same time in the research process, and has poor firmness.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a fusion plate and rod system which can simultaneously realize the functions of opening the door, fusing and correcting the vertebral body and has good firmness.

In order to solve the technical problems, the utility model provides the following technical scheme:

the utility model provides a fuse board nail stick system, includes fusion board and connective bar, the fusion board is including last fixed plate, vertebral lamina backup pad and the fixed plate down that connects gradually, wherein:

the upper fixing plate is provided with a first nail hole, and a first lamina screw used for being fixed to an upper lamina at a lamina door opening position is arranged in the first nail hole;

the lower fixing plate is provided with a second nail hole, a second vertebral plate screw used for being fixed to a lower vertebral plate at a position where the vertebral plate is opened is arranged in the second nail hole, and the axis of the second nail hole is inclined towards the upper fixing plate;

the second vertebral plate screw comprises a screw seat and a screw body, and a rod accommodating groove for accommodating the connecting rod is formed in the screw seat.

Further, the second nail hole is a threaded hole, and a lower section thread for screwing into the lower vertebral plate at the position of the vertebral plate opening door and an upper section thread which is positioned above the lower section thread and is matched with the threaded hole are arranged on the nail body of the second vertebral plate screw.

Further, a frustum which is gradually narrowed from top to bottom is arranged above the lower section of screw thread on the screw body of the second vertebral plate screw, the upper section of screw thread is positioned on the frustum, and the second screw hole is a conical hole matched with the frustum.

Further, the upper thread is a double-thread;

and/or the nail body of the second vertebral plate screw is movably connected with the nail seat thereof through the ball head.

Further, the lower end face of the nail head of the first vertebral plate screw is of a spherical structure, and the first nail hole is of a spherical groove structure matched with the spherical structure;

and/or, the first nail hole is a countersunk hole without internal threads;

and/or the first nail holes are in a pair and are vertically arranged side by side.

Further, the lamina door-opening support plate comprises a first arc-shaped plate connected with the upper fixing plate and a second arc-shaped plate connected with the lower fixing plate, wherein:

a first supporting leg which extends transversely is arranged on the inner side of the joint of the first arc-shaped plate and the second arc-shaped plate, and a second supporting leg which extends vertically is arranged on the inner side of the joint of the second arc-shaped plate and the lower fixing plate;

the first arc-shaped plate is of a vertical arc design, and the upper fixing plate, the first arc-shaped plate and the first supporting feet jointly form a clamping groove for accommodating the open end of the upper vertebral plate at the position where the vertebral plate is opened;

the second arc plate is of a transverse arc design, and the connecting end of the second arc plate and the first arc plate is higher than the connecting end of the second arc plate and the lower fixing plate.

Further, the included angle between the second supporting leg and the lower fixing plate is an obtuse angle, and the angle of the obtuse angle is 90-120 degrees;

and/or the height of the clamping groove is 4-8mm.

Further, an included angle between the axis of the second nail hole and the perpendicular line of the plane where the lower fixing plate is located is 30-60 degrees.

Further, a third nail hole is arranged on the lower fixing plate transversely and side by side with the second nail hole, and a third lamina screw used for being fixed to the lower lamina at the position where the lamina is opened is arranged in the third nail hole.

Further, the lower end face of the nail head of the third vertebral plate screw is of a spherical structure, and the third nail hole is of a spherical groove structure matched with the spherical structure;

and/or, the third nail hole is a countersunk hole without internal threads;

and/or the included angle between the axis of the third nail hole and the vertical line of the plane where the lower fixing plate is positioned is 30-60 degrees;

and/or the upper fixing plate, the vertebral plate door opening supporting plate and the lower fixing plate are made of pure titanium;

and/or the thickness of the upper fixing plate, the vertebral plate door opening supporting plate and the lower fixing plate is 0.4-1mm.

The utility model has the following beneficial effects:

the utility model relates to a fusion plate nail rod system, which comprises a fusion plate and a connecting rod, wherein a first nail hole of an upper fixing plate of the fusion plate is internally provided with a first vertebral plate screw used for being fixed on an upper vertebral plate at a position where a vertebral plate is opened, a second nail hole of a lower fixing plate of the fusion plate is internally provided with a second vertebral plate screw used for being fixed on a lower vertebral plate at a position where the vertebral plate is opened, the axis of the second nail hole inclines upwards towards the direction of the fixing plate, the second vertebral plate screw comprises a nail seat and a nail body, the nail seat is provided with a rod accommodating groove used for accommodating the connecting rod, compared with the prior art, the utility model adopts a mode of combining the fusion plate fixing technology with the nail rod system, the lower fixing plate of the fusion plate is fixed on the lower vertebral plate at the position where the vertebral plate is opened through the second vertebral plate screw, the spine structure has the advantages that a stable bridging structure is formed between the lifted vertebral plate and the ipsilateral side block, a real rigid support can be formed on the door opening side, the firmness is good, the spine structure can be maintained at a fixed position in the operation after operation, immediate stability is realized, the door can be effectively prevented from being closed again after operation or the door opening angle is reduced, the orthopedic effect of the nail rod system on the vertebral body can be effectively combined while the stable support is maintained, the spine structure is firmly fixed, a patient can perform functional exercise at an early stage, neck muscle atrophy and tissue adhesion are prevented, normal physiological lordosis of the cervical vertebra is effectively maintained, the activity of the vertebral body is improved, discomfort caused by long-term cervical collar wearing is reduced, meanwhile, the fusion plate is low in notch, and inflammatory symptoms caused by surrounding tissues can be prevented from being stimulated. The fusion plate nail rod system can simultaneously realize the functions of opening the door, fusing and correcting the vertebral body, and has good firmness.

Drawings

FIG. 1 is a schematic view of the overall structure of the fusion plate nailing rod system of the present utility model;

FIG. 2 is a schematic view of the combination of a fusion plate and a lamina screw in a fusion plate and rod system of the present utility model, wherein (a) is a schematic view of a second lamina screw without a seat shown and (b) is a schematic view of a second lamina screw with a seat shown;

FIG. 3 is a schematic view of the structure of a fusion plate in the fusion plate nailing rod system of the present utility model;

FIG. 4 is a schematic view of the construction of a second lamina screw of the fusion plate screw rod system of the present utility model;

FIG. 5 is a schematic view of the use of the fusion plate nailing rod system of the present utility model.

Detailed Description

In order to make the technical problems, technical solutions and advantages to be solved more apparent, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.

The utility model provides a fusion plate nailing rod system, which is shown in figures 1-5 and comprises a fusion plate and a connecting rod 4, wherein the fusion plate comprises an upper fixing plate 1, a vertebral plate door opening supporting plate 2 and a lower fixing plate 3 which are sequentially connected, and the fusion plate comprises the following components:

the upper fixing plate 1 is provided with a first nail hole 11, and a first lamina screw 12 used for being fixed to the upper lamina 10 at the lamina door opening position is arranged in the first nail hole 11;

the lower fixing plate 3 is provided with a second nail hole 31, a second vertebral plate screw 32 used for being fixed to a lower vertebral plate 30 (also called a lateral mass) at the position where the vertebral plate is opened is arranged in the second nail hole 31, and the axis of the second nail hole 31 is inclined towards the direction of the upper fixing plate 1;

the second lamina screw 32 includes a nail seat 321 and a nail body 322, wherein a rod accommodating groove 323 for accommodating the connecting rod 4 is formed on the nail seat 321, specifically, the second lamina screw 32 may be a pedicle screw fixed to a pedicle of the lower lamina 30 where the lamina is opened, and the fixing of the connecting rod 4 by the nail seat 321 may be performed by various conventional technologies in the art (such as locking plugs, etc.), which will not be repeated herein.

When in use, one side of the vertebral plate is cut, and the opposite side is cut so as to open the vertebral plate to form a door; the fusion plate is then bent to a proper shape in advance, the upper fixing plate 1 of the fusion plate is placed on the upper lamina 10 on the upper side of the incision, the lower fixing plate 3 of the fusion plate is placed on the lower lamina 30 on the lower side of the incision, then the first lamina screw 12 is held and fixed to the upper lamina 10 at the opening of the lamina door along the first nail hole 11 of the upper fixing plate 1, the second lamina screw 32 is held and fixed to the lower lamina 30 at the opening of the lamina door along the second nail hole 31 of the lower fixing plate 3, and finally the connecting rod 4 is held and placed in the rod receiving groove 323 of the nail seat 321 of the second lamina screw 32 and locked, and implantation is completed (refer to fig. 5).

The utility model relates to a fusion plate nail rod system, which comprises a fusion plate and a connecting rod, wherein a first nail hole of an upper fixing plate of the fusion plate is internally provided with a first vertebral plate screw used for being fixed on an upper vertebral plate at a position where a vertebral plate is opened, a second nail hole of a lower fixing plate of the fusion plate is internally provided with a second vertebral plate screw used for being fixed on a lower vertebral plate at a position where the vertebral plate is opened, the axis of the second nail hole inclines upwards towards the direction of the fixing plate, the second vertebral plate screw comprises a nail seat and a nail body, the nail seat is provided with a rod accommodating groove used for accommodating the connecting rod, compared with the prior art, the utility model adopts a mode of combining the fusion plate fixing technology with the nail rod system, the lower fixing plate of the fusion plate is fixed on the lower vertebral plate at the position where the vertebral plate is opened through the second vertebral plate screw, the spine structure has the advantages that a stable bridging structure is formed between the lifted vertebral plate and the ipsilateral side block, a real rigid support can be formed on the door opening side, the firmness is good, the spine structure can be maintained at a fixed position in the operation after operation, immediate stability is realized, the door can be effectively prevented from being closed again after operation or the door opening angle is reduced, the orthopedic effect of the nail rod system on the vertebral body can be effectively combined while the stable support is maintained, the spine structure is firmly fixed, a patient can perform functional exercise at an early stage, neck muscle atrophy and tissue adhesion are prevented, normal physiological lordosis of the cervical vertebra is effectively maintained, the activity of the vertebral body is improved, discomfort caused by long-term cervical collar wearing is reduced, meanwhile, the fusion plate is low in notch, and inflammatory symptoms caused by surrounding tissues can be prevented from being stimulated. The fusion plate nail rod system can simultaneously realize the functions of opening the door, fusing and correcting the vertebral body, and has good firmness. The utility model is mainly suitable for cervical spine canal stenosis symptoms and multi-segment spinal cord cervical spondylosis.

As shown in fig. 2-5, preferably, the second nail hole 31 is a threaded hole, and the nail body 322 of the second lamina screw 32 is provided with a lower section thread 324 for screwing into the lower lamina 30 at the lamina opening position and an upper section thread 325 above the lower section thread 324 for matching with the threaded hole, so as to improve the stability and the firmness of the connection position of the second lamina screw 32 and the lower fixing plate 3, and better realize the functions of lamina opening fusion and orthopedic.

To further improve the stability and the firmness of the connection between the second lamina screw 32 and the lower fixation plate 3, a tapered platform may be provided on the shank 322 of the second lamina screw 32 above the lower thread 324, the upper thread 325 being located on the tapered platform (fig. 4), and the second nail hole 31 being a tapered hole that mates with the tapered platform. The upper thread 325 is preferably a double thread. The screw body 322 of the second lamina screw 32 is preferably movably connected with its screw seat 321 by a ball head 326, i.e. the second lamina screw 32 is a universal pedicle screw.

As shown in fig. 2-3, the lower end surface of the nail head of the first lamina screw 12 may be in a spherical structure, and the first nail hole 11 is a spherical groove structure 111 matched with the spherical structure, so that the first lamina screw 12 is stably fixed in the first nail hole 11 of the upper fixing plate 1, stability and firmness between the first lamina screw 12 and the upper fixing plate 1 are improved, thereby realizing firm fixation of the plate and the bone, and further enabling the upper fixing plate 1 to be stably fixed on the upper lamina 10.

The first nail hole 11 is preferably a countersunk hole without internal threads, so that the first nail hole 11 is not internally threaded, and the fixation with the bone is completed through the first lamina screw 12, thereby reducing stress concentration; the first nail hole 11 is a countersunk hole, so that the head of the first vertebral plate screw 12 can be embedded in the first nail hole 11 after being fixed at the corresponding position and does not protrude out of the upper surface of the upper fixing plate 1, and the compression and the interference on human tissues above the upper fixing plate 1 can not be caused. The first nail holes 11 are preferably a pair and are arranged vertically side by side (i.e. along the length of the fusion plate).

As shown in fig. 1-3, the lamina-opening support plate 2 may include a first arcuate plate 21 connected to the upper fixation plate 1 and a second arcuate plate 22 connected to the lower fixation plate 3, wherein:

a first supporting leg 23 extending transversely is arranged on the inner side of the joint of the first arc-shaped plate 21 and the second arc-shaped plate 22, and a second supporting leg 24 extending vertically is arranged on the inner side of the joint of the second arc-shaped plate 22 and the lower fixed plate 3;

the first arc-shaped plate 21 is of a vertical arc design, and the upper fixing plate 1, the first arc-shaped plate 21 and the first supporting feet 23 jointly form a clamping groove 25 for accommodating the open end of the upper vertebral plate 10 at the position where the vertebral plate is opened;

the second arc plate 22 is designed with a transverse arc, and the connection end of the second arc plate 22 and the first arc plate 21 is higher than the connection end of the second arc plate 22 and the lower fixing plate 3 (i.e. the right end of the second arc plate 22 is higher than the left end in the figure).

In use, after the upper and lower fixation plates 1, 3 of the fusion plate are placed on the upper and lower vertebral plates 10, 30, respectively, the fusion plate is positioned so that the first leg 23 supports the upper vertebral plate 10 and the second leg 24 supports the lower vertebral plate 30 (see fig. 5), and then screws of the vertebral plates are implanted.

In this embodiment, the first supporting leg 23 and the second supporting leg 24 can provide a powerful support, which can effectively prevent the reduction of the door closing or opening angle after the operation, keep the expansion of the vertebral canal and realize the effective decompression of the inside of the vertebral canal; simultaneously, the vertebral plate door opening support plate 2 is connected by adopting a two-section arc structure, the structure reduces occupied vertebral plate space, simultaneously reduces stress concentration well, improves the strength of the fusion plate, reduces postoperative risk, and the second arc plate 22 is of a transverse arc design (namely a gentle arc design) and protrudes upwards slightly, so that the area of the vertebral tube door opening is increased under the premise of ensuring the strength of the fusion plate.

The included angle between the second supporting leg 24 and the lower fixing plate 3 is preferably an obtuse angle, the obtuse angle is preferably 90-120 degrees, and can be 90 degrees, 95 degrees, 100 degrees, 105 degrees, 110 degrees, 115 degrees and 120 degrees, so that the obtuse angle design is adopted to be matched with the cross section of the opened side vertebral plate after cutting (namely, the open end of the lower vertebral plate 30 at the position where the vertebral plate is opened), the support is firm, and meanwhile, the requirement on the osteotomy angle of doctors can be reduced, and the use is convenient. The height of the clamping groove 25 can be 4-8mm, so that the clamping groove is suitable for different spinal (such as cervical vertebra, thoracic vertebra and lumbar vertebra) segments of different people.

As shown in FIG. 3, to facilitate the implantation of the second lamina screw 32, the angle α between the axis of the second nail hole 31 and the perpendicular to the plane of the lower plate 3 is preferably 30-60 degrees, and may specifically be 30 degrees, 35 degrees, 40 degrees, 45 degrees, 50 degrees, 55 degrees, 60 degrees.

As shown in fig. 1-3, a third nail hole 33 may be provided on the lower fixing plate 3 laterally side by side (i.e., along the width direction of the fusion plate) with the second nail hole 31, and a third lamina screw 34 for fixing to the lower lamina 30 at the lamina opening position is provided in the third nail hole 33, so as to assist in fixing the lower fixing plate 3, and improve the stability and firmness of the lower fixing plate 3.

Further, the lower end surface of the nail head of the third lamina screw 34 may be in a spherical structure, and the third nail hole 33 is a spherical groove structure 331 matched with the spherical structure, so that the third lamina screw 34 is stably fixed in the third nail hole 33 of the lower fixing plate 3, stability and firmness between the third lamina screw 34 and the lower fixing plate 3 are improved, thereby realizing firm fixation of the plate and the bone, and further enabling the lower fixing plate 3 to be more stably fixed on the lower lamina 30.

The third nail hole 33 is preferably a countersunk hole without internal threads, so that the third nail hole 33 is not internally threaded, and the fixation with the bone is completed by the third lamina screw 34, thereby reducing stress concentration; the third nail hole 33 is a countersunk hole, so that the head of the third vertebral plate screw 34 can be embedded in the third nail hole 33 without protruding out of the upper surface of the lower fixing plate 3 after being fixed at the corresponding position, and the pressing and the interference to the human tissue above the lower fixing plate 3 can not be caused. The angle between the axis of the third nail hole 33 and the vertical line of the plane of the lower fixing plate 3 is preferably 30-60 degrees, so as to facilitate the nail implantation and improve the firmness of the plate and the bone.

The upper fixing plate 1, the vertebral plate door opening supporting plate 2 and the lower fixing plate 3 are preferably made of pure titanium and can be integrally formed; the thickness of the upper fixing plate 1, the vertebral plate door opening supporting plate 2 and the lower fixing plate 3 can be 0.4-1mm, so that the shaping in operation is convenient.

In summary, the fusion plate nail rod system provided by the utility model is verified through multiple clinical experiments to adopt the optimal radian curve connection, so that a smooth arc transition link can be formed and slightly raised after the product is fixed with the cervical vertebra, the opening area of the vertebral canal is increased on the premise of ensuring the strength of the fusion plate, meanwhile, the stress concentration can be well reduced, the requirement on the osteotomy angle of a doctor is greatly reduced, the fixation is firm, the use is convenient, the space occupation can be reduced, and the effective decompression in the vertebral canal is realized.

While the foregoing is directed to the preferred embodiments of the present utility model, it will be appreciated by those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present utility model, and such modifications and adaptations are intended to be comprehended within the scope of the present utility model.

Claims (10)

1. The utility model provides a fuse board nail stick system, its characterized in that, including fusing board and connective bar, fuse the board and open the door backup pad and lower fixed plate including last fixed plate, vertebral plate that connect gradually, wherein:

the upper fixing plate is provided with a first nail hole, and a first lamina screw used for being fixed to an upper lamina at a lamina door opening position is arranged in the first nail hole;

the lower fixing plate is provided with a second nail hole, a second vertebral plate screw used for being fixed to a lower vertebral plate at a position where the vertebral plate is opened is arranged in the second nail hole, and the axis of the second nail hole is inclined towards the upper fixing plate;

the second vertebral plate screw comprises a screw seat and a screw body, and a rod accommodating groove for accommodating the connecting rod is formed in the screw seat.

2. The fusion plate nail rod system according to claim 1, wherein the second nail hole is a threaded hole, and the nail body of the second vertebral plate screw is provided with lower-section threads for screwing into a lower vertebral plate at a vertebral plate door opening position and upper-section threads above the lower-section threads for being matched with the threaded hole.

3. The fusion plate rod nailing system according to claim 2 wherein the shank of the second lamina screw is provided with a tapered land above the lower thread, the upper thread being located on the tapered land, the second nail hole being a tapered hole that mates with the tapered land.

4. The fusion plate rod system of claim 2 wherein the upper thread is a double thread;

and/or the nail body of the second vertebral plate screw is movably connected with the nail seat thereof through the ball head.

5. The fusion plate nail rod system according to claim 1, wherein the lower end face of the nail head of the first vertebral plate screw is of a spherical structure, and the first nail hole is of a spherical groove structure matched with the spherical structure;

and/or, the first nail hole is a countersunk hole without internal threads;

and/or the first nail holes are in a pair and are vertically arranged side by side.

6. The fusion plate rod nailing system of claim 1 wherein the lamina opening support plate comprises a first arcuate plate connected to the upper fixation plate and a second arcuate plate connected to the lower fixation plate, wherein:

a first supporting leg which extends transversely is arranged on the inner side of the joint of the first arc-shaped plate and the second arc-shaped plate, and a second supporting leg which extends vertically is arranged on the inner side of the joint of the second arc-shaped plate and the lower fixing plate;

the first arc-shaped plate is of a vertical arc design, and the upper fixing plate, the first arc-shaped plate and the first supporting feet jointly form a clamping groove for accommodating the open end of the upper vertebral plate at the position where the vertebral plate is opened;

the second arc plate is of a transverse arc design, and the connecting end of the second arc plate and the first arc plate is higher than the connecting end of the second arc plate and the lower fixing plate.

7. The fusion plate nailing rod system of claim 6 wherein the included angle between the second leg and the lower mounting plate is an obtuse angle, the obtuse angle being 90-120 degrees;

and/or the height of the clamping groove is 4-8mm.

8. The fusion plate rod and staple system of claim 1 wherein the axis of the second staple hole is at an angle of 30-60 degrees to the perpendicular to the plane of the lower fixation plate.

9. The fusion plate rod system according to any one of claims 1-8 wherein a third nail hole is provided in the lower fixation plate laterally side-by-side with the second nail hole, and a third lamina screw is provided in the third nail hole for fixation to the lower lamina where the lamina is open.

10. The fusion plate nail rod system according to claim 9, wherein the lower end face of the nail head of the third vertebral plate screw is of a spherical structure, and the third nail hole is of a spherical groove structure matched with the spherical structure;

and/or, the third nail hole is a countersunk hole without internal threads;

and/or the included angle between the axis of the third nail hole and the vertical line of the plane where the lower fixing plate is positioned is 30-60 degrees;

and/or the upper fixing plate, the vertebral plate door opening supporting plate and the lower fixing plate are made of pure titanium;

and/or the thickness of the upper fixing plate, the vertebral plate door opening supporting plate and the lower fixing plate is 0.4-1mm.

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