CN203138657U - Nail retreating prevention device of spine implanting system - Google Patents
Nail retreating prevention device of spine implanting system Download PDFInfo
- Publication number
- CN203138657U CN203138657U CN 201320087206 CN201320087206U CN203138657U CN 203138657 U CN203138657 U CN 203138657U CN 201320087206 CN201320087206 CN 201320087206 CN 201320087206 U CN201320087206 U CN 201320087206U CN 203138657 U CN203138657 U CN 203138657U
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- China
- Prior art keywords
- nail
- pedicle nail
- vertebral pedicle
- plug
- shaped groove
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- 230000002265 prevention Effects 0.000 title abstract 5
- 239000007943 implant Substances 0.000 claims description 11
- 230000000694 effects Effects 0.000 abstract description 2
- 230000007704 transition Effects 0.000 abstract 1
- 210000000988 bone and bone Anatomy 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001575 pathological effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 210000000115 thoracic cavity Anatomy 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
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Abstract
The utility model relates to a nail retreating prevention device of a spine implanting system. The nail retreating prevention device comprises a vertebral pedicle nail, a core rod, a top thread and a connecting rod, wherein the front end of the vertebral pedicle nail is provided with a U-shaped groove, the back end of the vertebral pedicle nail is provided with a long-striped fine groove, screw threads are arranged on the outer surface of the vertebral pedicle nail, a large cavity and a small cavity which are in axial arrangement and are communicated are arranged inside the vertebral pedicle nail, a small-conicity transition step hole is formed between the large cavity and the small cavity, the core rod is inserted into the large cavity of the vertebral pedicle nail, the diameter of the core rod is smaller than the diameter of the small cavity, the connecting rod is arranged in the U-shaped groove of the vertebral pedicle nail, and the top thread is connected into the U-shaped groove through screw threads and realizes the compressing effect with the connecting rod. The nail retreating prevention device has the advantages that the connecting rod is put into the U-shaped groove of the vertebral pedicle nail, the top thread is tightly pressed, and the force is conducted to the core rod through the connecting rod, so the nail retreating prevention mechanism is more stable and firmer, and the spine implanting system is enabled not to generate the looseness or nail retreating in the service life for several years or even decades of years.
Description
Technical field
This utility model belongs to medicine technology field, particularly a kind of anti-back spike devices of spinal implant system.
Background technology
At present, along with the development of internal fixation of spine technology, use the regression of steel plate screw treatment pathologic at cervical vertebra, thoracic vertebra and lumbar vertebra, spinal trauma is very general.Multiple structural design has appearred in the development through decades.Studies show that the use of internal fixation of spine technology can increase the bone fusion rate, increase spin intensity, axial load and the anti-Qu Li that stretches.Because human spine's special physiological structure and activity frequency are high for design and the manufacturing requirement of spinal internal fixation system, not only will have good intensity biology, also require to have narrower width and the firm anti-unloading device of bone screw simultaneously.Clinical proof if there is not the anti-unloading device of additional reliable bone screw, causes the loosening of bone screw easily and withdraws from steel plate, causes operative failure.In the spinal operation, usually can use pedicle nail, reach the several months at the pedicle nail implant into body; even in the military service phase of several years, can be subjected to long-term complicated stress, and these stress; can cause pedicle nail to become flexible, move back complication such as nail, have certain limitation.
The utility model content
The purpose of this utility model is to overcome the defective that prior art exists, and a kind of firm and difficult loosening anti-back spike devices of moving back the spinal implant system of nail is provided.
The technical scheme that realizes this utility model purpose is: a kind of anti-back spike devices of spinal implant system comprises pedicle nail, plug, jackscrew and pitman; The front end of described pedicle nail has U-lag, and the rear end is provided with the strip stria, has screw thread on the outer surface, and inside has big chamber and the loculus of axial setting and connection; Have conelet between described big chamber and the loculus and spend the stepped hole that crosses; Described plug inserts the big intracavity of pedicle nail, and the diameter of plug is greater than the diameter of loculus; Described pitman is arranged in the U-shaped groove of pedicle nail; Described jackscrew is threaded in the U-shaped groove, and and pitman between compress.
The rear end of the described plug of technique scheme is tapered.
The front end of the described plug of technique scheme is provided with the plug screw thread.
After adopting technique scheme, the utlity model has following positive effect:
(1) pedicle nail of the present utility model rear end is provided with the strip stria, the diameter of plug is greater than the diameter of loculus, when plug conelet degree transitioning end inserted the pedicle nail stepped hole, the stria part of meeting spreading pedicle nail made the pedicle nail threaded portion form inverted cone; Effectively prevent from implanting the loosening of back pedicle nail and move back nail.
(2) this utility model is put into pitman the U-shaped groove of pedicle nail, compress jackscrew, by pitman power is conducted to plug, make that this anti-back nailing machine structure is more firm, guaranteed that spinal implant system can not become flexible or move back nail in the length of service that reaches several years even many decades.
(3) this utility model plug adopts harder material to make, and loses efficacy in the time of can avoiding the aperture part of spreading pedicle nail.
(4) front end of plug of the present utility model is provided with screw thread, is convenient to the taking-up of implant.
Description of drawings
Content of the present utility model is easier to be expressly understood in order to make, and according to specific embodiment also by reference to the accompanying drawings, this utility model is described in further detail, wherein below
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the cutaway view of A-A direction among Fig. 1;
Fig. 3 is the structural representation of plug of the present utility model;
1. pedicle nails among the figure, 11.U shape groove, 12. strias, 13. screw threads, 14. big chambeies, 15. loculuses, 16. stepped holes, 2. plug, 21. plug screw threads, 3. jackscrew, 4. pitman.
The specific embodiment
(embodiment 1)
See Fig. 1 to Fig. 3, this utility model comprises pedicle nail 1, plug 2, jackscrew 3 and pitman 4; The front end of pedicle nail 1 has U-lag 11, and the rear end is provided with strip stria 12, has screw thread 13 on the outer surface, and inside has big chamber 14 and the loculus 15 of axial setting and connection; Have conelet between big chamber 14 and the loculus 15 and spend the stepped hole 16 that crosses; Plug 2 inserts in the big chamber 14 of pedicle nail 1, and the diameter of plug 2 is greater than the diameter of loculus 15; The front end of plug 2 is provided with plug screw thread 21, and the rear end of plug 2 is tapered; Pitman 4 is arranged in the U-shaped groove 11 of pedicle nail 1; Jackscrew 3 is threaded in the U-shaped groove 11, and and pitman 4 between compress.
Operation principle of the present utility model is: the U-shaped groove 11 of pitman 4 being put into pedicle nail 1, compress jackscrew 3, by pitman 4 power is conducted to plug 2, make that this device is more firm, guaranteed that spinal implant system can not become flexible or move back nail in the length of service that reaches several years even many decades.
Above-described specific embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; institute is understood that; the above only is specific embodiment of the utility model; be not limited to this utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.
Claims (3)
1. the anti-back spike devices of a spinal implant system is characterized in that: comprise pedicle nail (1), plug (2), jackscrew (3) and pitman (4); The front end of described pedicle nail (1) has U-lag (11), and the rear end is provided with strip stria (12), has screw thread (13) on the outer surface, and inside has big chamber (14) and the loculus (15) of axial setting and connection; Have conelet between described big chamber (14) and the loculus (15) and spend the stepped hole (16) that crosses; Described plug (2) inserts in the big chamber (14) of pedicle nail (1), and the diameter of plug (2) is greater than the diameter of loculus (15); Described pitman (4) is arranged in the U-shaped groove (11) of pedicle nail (1); Described jackscrew (3) is threaded in the U-shaped groove (11), and and pitman (4) between compress.
2. the anti-back spike devices of spinal implant system according to claim 1, it is characterized in that: the rear end of described plug (2) is tapered.
3. the anti-back spike devices of spinal implant system according to claim 2, it is characterized in that: the front end of described plug (2) is provided with plug screw thread (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320087206 CN203138657U (en) | 2013-02-26 | 2013-02-26 | Nail retreating prevention device of spine implanting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320087206 CN203138657U (en) | 2013-02-26 | 2013-02-26 | Nail retreating prevention device of spine implanting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203138657U true CN203138657U (en) | 2013-08-21 |
Family
ID=48966221
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320087206 Expired - Lifetime CN203138657U (en) | 2013-02-26 | 2013-02-26 | Nail retreating prevention device of spine implanting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203138657U (en) |
-
2013
- 2013-02-26 CN CN 201320087206 patent/CN203138657U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130821 |