CN203609498U - Dynamic intervertebral connecting rod - Google Patents
Dynamic intervertebral connecting rod Download PDFInfo
- Publication number
- CN203609498U CN203609498U CN201320786653.8U CN201320786653U CN203609498U CN 203609498 U CN203609498 U CN 203609498U CN 201320786653 U CN201320786653 U CN 201320786653U CN 203609498 U CN203609498 U CN 203609498U
- Authority
- CN
- China
- Prior art keywords
- rod
- groove type
- type interface
- rod body
- connecting rod
- 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 - Fee Related
Links
- 238000007789 sealing Methods 0.000 claims description 7
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 230000007704 transition Effects 0.000 abstract 1
- 230000004927 fusion Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 230000008468 bone growth Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 230000000638 stimulation Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 241001079814 Symphyotrichum pilosum Species 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 235000004224 Typha angustifolia Nutrition 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
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Abstract
The utility model relates to a dynamic intervertebral connecting rod which comprises a first rod body and a second rod body. A groove type interface is arranged at one end of the first rod body, one end of the second rod body is inserted into the groove type interface, a boss is arranged at the end of the inserted end, the second rod body in the groove type interface and tightly close to the boss is sequentially sleeved by a butterfly-shaped elastic piece, a retaining ring, a butterfly-shaped elastic piece and a seal cap, and the seal cap is fixedly in threaded-matched connection with the groove type interface so that the inserted end of the second rod body is dynamically and slightly sealed in the groove type interface. Main bodies of the first rod body and the second rod body are elastic rods. The dynamic intervertebral connecting rod is simple in structure and safe and convenient to operate, has a smooth transition function, can reduce pressure of intervertebral adjacent sections, avoid stress concentration and improve the spine fixing stability and is an ideal dynamic intervertebral connecting rod.
Description
Technical field
This utility model relates to a kind of orthopaedics medical apparatus and instruments, specifically a kind of for the fixing dynamic intervertebral pitman of spinal column.
Background technology
We know, treatment spinal column is sick and wounded, generally can adopt spinal internal fixation system pedicle screw and pitman etc.Between the rigidity of fixed system and spinal vertebral, position mechanical property state (vertebral body swelling, expansion rate) is movable deciding factor between restriction neighbouring section vertebral body.Traditional pedicle screw and pitman are when fixing for spinal column, and pitman is generally titanium alloy or the rustless steel integrative-structure of monomer, and it is fixedly connected with pedicle screw.Owing to directly connecting between nail-rod, rigidity is very high, causes stress concentrations sometimes, causes the too early regression of neighbouring section vertebral body, is unfavorable for being not enough to the stability that keeps spinal column fixing be fixed fusion with optimum state.
Summary of the invention
Technical problem to be solved in the utility model is to overcome above-mentioned the deficiencies in the prior art, and a kind of simple in structure, easy to operate, safety is provided, there is soft excessive function, can reduce the pressure of intervertebral adjacent segment, avoid stress concentration, improve the dynamic intervertebral pitman of spinal column stability maintenance.
The technical scheme in the invention for solving the above technical problem is: a kind of dynamically intervertebral pitman, it is characterized in that: it comprises first body of rod, second body of rod two parts, one end of described first body of rod is provided with groove type interface, insert in groove type interface second body of rod one end, this insertion end end is provided with boss, in groove type interface, on second body of rod, adjacent boss is set with butterfly flexure strip successively, back-up ring, butterfly flexure strip, sealing cap, and be fixedly connected the dynamic fine motion shutoff of the second body of rod insertion end in groove type interface by sealing cap and groove type interface thread.
The main body of first body of rod described in the utility model, second body of rod is flexible rod.Can there is a crooked radian.Flexible rod can adopt various materials, comprises metal, polymer, pottery and their complex.Flexible rod self has counterrotating function.Flexible rod self also has Telescopic, front and back activity +/-0.8mm.Flexible rod self up and down can be movable within the scope of 4.5 ° of +/-.
This utility model is by interconnective first body of rod and second body of rod are set, and in the middle of it, coupling part is relatively soft, has soft excessive function, can limit motion and the stress of intervertebral pitman.Against existing technologies, this utility model has reduced rigidity, only has 1/3 of rigid rod, and non-fusion is fixed, and has avoided stress concentration, reduces the pressure of intervertebral adjacent segment, can fine motion stimulation of bone growth, promote to merge, and improve spinal column stability maintenance.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model will be further described.
Fig. 1 is structural representation of the present utility model.
Fig. 2 is cross-sectional schematic of the present utility model.
Label in figure is: 1. first body of rod, 2. butterfly flexure strip, 3. back-up ring, 4. sealing cap, 5. second body of rod.
The specific embodiment
From Fig. 1, Fig. 2, can find out, a kind of dynamically intervertebral pitman, it comprises first body of rod 1, second body of rod 5 two parts, one end of described first body of rod 1 is provided with groove type interface, insert in groove type interface second body of rod 5 one end, this insertion end end is provided with boss, in groove type interface, on second body of rod 5, adjacent boss is set with butterfly flexure strip 2, back-up ring 3, butterfly flexure strip 2, sealing cap 4 successively, and be fixedly connected by sealing cap 4 and groove type interface thread, by the dynamic fine motion shutoff of the second body of rod 5 insertion end in groove type interface.The mid portion that this utility model first body of rod is connected with second body of rod is provided with butterfly flexure strip 2, and in the middle of it, coupling part is relatively soft like this, has soft excessive function, can limit motion and the stress of intervertebral pitman.
The main body of first body of rod 1 described in the utility model, second body of rod 5 is flexible rod.Can there is a crooked radian.Flexible rod can adopt various materials, comprises metal, polymer, pottery and their complex.Flexible rod self has counterrotating function.Flexible rod self also has Telescopic, front and back activity +/-0.8mm.Flexible rod self up and down can be movable within the scope of 4.5 ° of +/-.
This utility model has reduced rigidity, only has 1/3 of rigid rod, and non-fusion is fixed, and has avoided stress concentration, reduces the pressure of intervertebral adjacent segment, can fine motion stimulation of bone growth, promote to merge, and improve spinal column stability maintenance.
Claims (2)
1. a dynamic intervertebral pitman, it is characterized in that: it comprises first body of rod, second body of rod two parts, one end of described first body of rod is provided with groove type interface, insert in groove type interface second body of rod one end, this insertion end end is provided with boss, in groove type interface, on second body of rod, adjacent boss is set with butterfly flexure strip, back-up ring, butterfly flexure strip, sealing cap successively, and is fixedly connected the dynamic fine motion shutoff of the second body of rod insertion end in groove type interface by sealing cap and groove type interface thread.
2. dynamic intervertebral pitman according to claim 1, is characterized in that: the main body of described first body of rod, second body of rod is flexible rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320786653.8U CN203609498U (en) | 2013-12-04 | 2013-12-04 | Dynamic intervertebral connecting rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320786653.8U CN203609498U (en) | 2013-12-04 | 2013-12-04 | Dynamic intervertebral connecting rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203609498U true CN203609498U (en) | 2014-05-28 |
Family
ID=50762186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320786653.8U Expired - Fee Related CN203609498U (en) | 2013-12-04 | 2013-12-04 | Dynamic intervertebral connecting rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203609498U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105361936A (en) * | 2014-09-01 | 2016-03-02 | 圣美智财有限公司 | Spinal rod piece linking device |
-
2013
- 2013-12-04 CN CN201320786653.8U patent/CN203609498U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105361936A (en) * | 2014-09-01 | 2016-03-02 | 圣美智财有限公司 | Spinal rod piece linking device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140528 Termination date: 20161204 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |