CN215129881U - Sleeve pressurizing vertebral pedicle screw for vertebral column fracture - Google Patents
Sleeve pressurizing vertebral pedicle screw for vertebral column fracture Download PDFInfo
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- CN215129881U CN215129881U CN202120415730.3U CN202120415730U CN215129881U CN 215129881 U CN215129881 U CN 215129881U CN 202120415730 U CN202120415730 U CN 202120415730U CN 215129881 U CN215129881 U CN 215129881U
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- screw
- main core
- mounting hole
- sleeve pipe
- pedicle
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Abstract
The utility model discloses a spinal fracture is with sleeve pipe pressurization pedicle of vertebral arch screw, including sleeve pipe screw and main core screw, the afterbody of sleeve pipe screw is provided with the U type portion that can block the stick, be provided with the internal thread on the inner wall of U type portion both sides, the mounting hole is worn to be equipped with by the tank bottom of U-shaped portion, main core screw is located the mounting hole to the horizontal position of main core screw afterbody is located the tank bottom department of U-shaped portion, the guide pin hole is worn to be equipped with by main core screw inside. The utility model discloses a carry and draw and the pressurized mode draws the fracture seam together to realize firmly fixing, increase fracture seam contact surface promotes the fracture seam and heals up fast.
Description
Technical Field
The utility model belongs to the technical field of medical auxiliary instrument, concretely relates to backbone is sleeve pipe pressurization pedicle of vertebral arch screw for fracture.
Background
In addition to the common compression and explosive fractures of the thoracolumbar spine, some patients often have associated fractures of the pedicles. Traditional ordinary titanium alloy pedicle screw is when carrying out nail-excellent system stable backbone fracture, often unable cracked pedicle of vertebral arch of handling, even when ordinary screw implantation in-process is through the distal broken end of fracture seam, because of the art person not strictly along the screw axis twist in, perhaps the wrong pressurization of art person twists in the screw, resistance increase in the time of all can causing screw head screw in, the cracked clearance of pedicle of vertebral arch has been increased, cause the fracture broken end can't connect together, make the fracture of pedicle of vertebral arch postpone the healing or even not heal, influence whole internal fixation system's stability, easy concurrency screw is not hard up, extract, thereby cause the operation failure, secondary operation etc.. Even if the vertebral body fracture is healed, the operation of taking out the internal fixation for the second time can not be carried out due to the influence of the non-healing of the vertebral pedicle fracture on the stability of the whole vertebral column in the later period.
SUMMERY OF THE UTILITY MODEL
The utility model provides a to the technical problem that above-mentioned exists, provide a sleeve pipe pressurization pedicle of vertebral arch screw for backbone fracture.
The utility model adopts the technical proposal that:
the utility model provides a spinal fracture is with sleeve pipe pressurization pedicle of vertebral arch screw, includes sleeve pipe screw and main core screw, the afterbody of sleeve pipe screw is provided with the U type portion that can block the stick, be provided with the internal thread on the inner wall of U type portion both sides, the mounting hole is worn to be equipped with by the tank bottom of U type portion, main core screw is located the mounting hole to the horizontal position of main core screw afterbody is located the tank bottom department of U type portion, the guide pin hole is worn to be equipped with by main core screw inside.
Preferably, the inner wall of the mounting hole is a smooth surface, the outer wall of the upper section of the main core screw in the mounting hole is also a smooth surface, and the outer wall of the lower end of the main core screw outside the mounting hole is provided with threads.
Preferably, the distance between the end part of the sleeve screw and the external thread part of the main core screw is 1-2 mm.
Preferably, the tail part of the main core screw is in a quincunx shape or a hexagonal shape.
Preferably, the inner diameter of the guide pin hole is 1 mm.
Preferably, the sleeve screw is made of a titanium alloy material, the length of the sleeve screw is 50mm, the height of the tail of the sleeve screw is about 4-5mm, and the diameter of the threaded part is 65 mm.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a sleeve pipe pressurization pedicle of vertebral arch screw, the hollow sleeve pipe screw of a rotatory slide rail is established to tail end cover at main core screw, install main core screw in the inside mounting hole of sleeve pipe screw earlier with fix with screw owner heart and sleeve pipe, twist (two silk align and form holistic screw thread) with a whole, the head end of screw has been to the distal end of fracture seam this moment, at this moment the main core screw is twisted to the fixed sleeve pipe screw is with the distal end of fracture seam through lifting the pulling force laminating to the proximal end of fracture seam, draw and the pressurized mode is drawn together the fracture seam through lifting, thereby realize firmly fixedly, increase fracture seam contact surface, promote the fracture seam to heal up fast.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a cross-sectional view of a cannulated screw.
Wherein, 1-main core bolt; 2-a cannulated screw; 201-mounting holes; 202-U-shaped part; 203-internal thread.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The utility model particularly provides a spinal fracture is with sleeve pipe pressurization pedicle of vertebral arch screw, including sleeve pipe screw 2 and main core screw 1.
Specifically, as shown in fig. 1 and 2, the tail of the sleeve screw 2 is provided with a U-shaped portion 202 capable of clamping a rod, inner threads 203 are provided on inner walls of two sides of the U-shaped portion 202, a mounting hole 201 is formed in a groove bottom of the U-shaped portion 202, the main core screw 1 is located in the mounting hole 201, a horizontal position of the tail of the main core screw 1 is located in the groove bottom of the U-shaped portion 202, and a guide pin hole (not shown in the drawing) is formed in the main core screw 1.
In the embodiment, the sleeve screw 2 is made of titanium alloy material, the length of the titanium alloy material is 50mm, the height of the tail part of the titanium alloy material is about 4-5mm, and the diameter of the threaded part of the titanium alloy material is 65 mm. The distance between the end part of the sleeve screw 2 and the external thread part of the main core screw 1 is 1-2 mm. Such that the cannulated screw 2 is visually threadingly engaged with the main core screw 1 without increasing the overall screw diameter. In addition, the inner wall of the mounting hole 201 is a smooth surface, the outer wall of the upper section of the main core screw 1 in the mounting hole 201 is also a smooth surface, and the outer wall of the lower end of the main core screw outside the mounting hole 201 is provided with threads.
In this embodiment, the tail of the main core screw 1 is quincunx or hexagonal, so that the main body of the screw can be conveniently screwed in, and the tail of the sleeve screw 2 is provided with a nut with threads, so that a corresponding screwdriver can be conveniently screwed in.
In this embodiment, the inner diameter of the guide pin hole is 1 mm.
When the bone fracture fixation device is used, the screw is firstly used for fixing the main core and the sleeve, the main core and the sleeve are completely screwed in a whole (the two threads are aligned to form an integral thread), the head end of the screw reaches the distal end of the fracture seam at the moment, the screw of the main core is screwed by the screw of the fixing sleeve, the distal end of the fracture seam is attached to the proximal end of the fracture seam through lifting force, and the fracture seam is pulled together through lifting and pressurizing modes; firm fixation is realized, the contact surface of the fracture joint is enlarged, and the rapid healing of the fracture joint is promoted.
The above, only be the preferred embodiment of the utility model, it is not right the utility model discloses do any restriction, all according to utility model technical entity to any simple modification, change and the equivalent change of doing above embodiment, all still belong to the utility model discloses technical scheme's within the scope of protection.
Claims (6)
1. The utility model provides a spinal fracture is with sleeve pipe pressurization pedicle of vertebral arch screw, its characterized in that, includes sleeve pipe screw and main core screw, the afterbody of sleeve pipe screw is provided with the U type portion that can block the stick, be provided with the internal thread on the inner wall of U type portion both sides, the mounting hole is worn to be equipped with by the tank bottom of U type portion, main core screw is located the mounting hole to the horizontal position of main core screw afterbody is located the tank bottom department of U type portion, the inside guide pin hole of wearing to be equipped with of main core screw.
2. The cannula compression pedicle screw for spine fracture according to claim 1, wherein the inner wall of the mounting hole is smooth, the outer wall of the upper section of the main core screw in the mounting hole is also smooth, and the outer wall of the lower end of the main core screw outside the mounting hole is provided with threads.
3. The cannulated pedicle screw for spinal fracture according to claim 1, wherein the distance from the end of the cannulated screw to the external thread of the main core screw is 1-2 mm.
4. The cannulated compression pedicle screw for spinal fracture according to claim 1, wherein the tail portion of the main core screw is quincunx or hexagonal.
5. The cannulated compression pedicle screw for spinal fracture according to claim 1, wherein the inner diameter of the guide pin hole is 1 mm.
6. The cannulated compression pedicle screw for spinal fracture according to claim 1, wherein the cannulated screw is made of titanium alloy material, has a length of 50mm, a tail height of about 4-5mm and a threaded portion diameter of 65 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120415730.3U CN215129881U (en) | 2021-02-25 | 2021-02-25 | Sleeve pressurizing vertebral pedicle screw for vertebral column fracture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120415730.3U CN215129881U (en) | 2021-02-25 | 2021-02-25 | Sleeve pressurizing vertebral pedicle screw for vertebral column fracture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215129881U true CN215129881U (en) | 2021-12-14 |
Family
ID=79412415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120415730.3U Active CN215129881U (en) | 2021-02-25 | 2021-02-25 | Sleeve pressurizing vertebral pedicle screw for vertebral column fracture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215129881U (en) |
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2021
- 2021-02-25 CN CN202120415730.3U patent/CN215129881U/en active Active
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