CN203953793U - A kind of double nip screw - Google Patents
A kind of double nip screw Download PDFInfo
- Publication number
- CN203953793U CN203953793U CN201420375713.1U CN201420375713U CN203953793U CN 203953793 U CN203953793 U CN 203953793U CN 201420375713 U CN201420375713 U CN 201420375713U CN 203953793 U CN203953793 U CN 203953793U
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- CN
- China
- Prior art keywords
- pitman
- interface
- screw
- interfaces
- thread post
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- 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
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Abstract
This utility model is for the fixing double nip screw of the spinal surgery way of escape, can provide two pitman interfaces for spinal surgery difference is fixedly connected with type demand.Rivet nut and fastening nut, consist of, rivet nut tail end is provided with two pitman interfaces; By middle interface thread post separately, the both sides of pitman interface are respectively an interface thread post to two pitman interfaces simultaneously; Fastening nut is connected with the interface thread post of pitman interface both sides by coupling screw thread.This utility model can realize for spinal surgery provides a kind of the demand that simultaneously connects two kinds of different pitmans simultaneously on the screw of a sections.
Description
Technical field
The present invention is for the fixing double nip screw of the spinal surgery way of escape, can provide two pitman interfaces for the different fixed type demands of spinal surgery.
Background technology
Spinal surgery posterior Pedicle screw is fixed, rib transverse process screw is fixed, the fixing modus operandi that waits of lateral mass screw is different, but all need screw to fix, the current screw for spinal surgery is each have their own feature also, but rear is all a pitman interface, be applicable to simple strong fixing operation at present, also be applicable to the simple dynamic fixation system based on pedicle screw instrumentation at present, as Dynesys(Zimmer, US) and Isobar system.
Yet in clinical application practice, especially multi-segmental spinal column regression patient, be not that all sections are all applicable to dynamically fixing sometimes, or all patients is applicable to strong fixing.For some multi-segmental spinal column degeneration patients, part sections is applicable to adopting strong fixedly row fusion more, stable fixing, and part sections is applicable to dynamic fixation more.And current single interface screw cannot be realized the function that connects strong hold-down bars and dynamic hold-down bars simultaneously.
In addition, some patients think needs some special hold-down bars, as Patients Undergoing Scoliosis Correction, sometimes needs to connect growing rod and common strong hold-down bars simultaneously, and current single interface screw also cannot meet this demand.
Summary of the invention
In order to make a screw on vertebral body sections can meet the demand that connects different hold-down bars simultaneously.We have designed this double nip screw.
The present invention realizes by the following technical solutions:
1, the present invention is comprised of rivet nut and fastening nut, and rivet nut tail end is provided with two pitman interfaces.
2, by middle interface thread post separately, the both sides of pitman interface are respectively an interface thread post to two pitman interfaces simultaneously.
3, fastening nut is connected with the interface thread post of pitman interface both sides by coupling screw thread.
Accompanying drawing explanation
Fig. 1: rivet nut structural representation of the present invention.
Fig. 2: fastening nut structural representation of the present invention.
Fig. 3: structural representation after rivet nut of the present invention and fastening nut combination.
In figure: 1. rivet nut; 2. screw thread; 3. interface thread post; 4. pitman interface; 5. fastening nut.
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The specific embodiment
Embodiment 1
If patient's screw top spinal segments needs Mobile state to fix, screw below spinal segments need to be gone strong fixing.Patient anesthesia, Posterior approach, appears quadrate bone structure after spinal column, by demand, rivet nut of the present invention (1) is inserted to pedicle of vertebral arch or pedicle of vertebral arch right rib transverse process or lateral mass outward.After rivet nut position is satisfied, get and be dynamically fixedly connected with one of them pitman interface (4) that rod is placed to two the pitman interfaces in rear, get the strong another one pitman interface (4) that rod is placed to two pitman interfaces that is fixedly connected with, after position and angle are satisfied, be screwed into fastening nut (5), reach fixedly requirement.
Embodiment 2
If patient's screw top spinal segments need to be fixed by row growing rod, screw below spinal segments need to be gone strong fixing.Patient anesthesia, Posterior approach, appears quadrate bone structure after spinal column, by demand, rivet nut of the present invention (1) is inserted to pedicle of vertebral arch or pedicle of vertebral arch right rib transverse process or lateral mass outward.After rivet nut position is satisfied, get one of them pitman interface (4) that growing rod is placed to two the pitman interfaces in rear, get the strong another one pitman interface (4) that rod is placed to two pitman interfaces that is fixedly connected with, after position and angle are satisfied, be screwed into fastening nut (5), reach fixedly requirement.
Although described above the specific embodiment of the present invention, but the art personnel are to be understood that these only illustrate, the present invention be not only confined to connect strong be fixedly connected with rod, growing rod with dynamically in be fixedly connected with rod, be also suitable for other for the rod that is connected and fixed of spinal surgery.
Protection scope of the present invention is limited by appended claims.Those skilled in the art is not deviating under the prerequisite of principle of the present invention and essence, can make various changes or modifications to these embodiments, but these changes and modification all fall into protection scope of the present invention.
Claims (3)
1. a double nip screw, is comprised of rivet nut and fastening nut, it is characterized in that: rivet nut tail end is provided with two pitman interfaces.
2. double nip screw according to claim 1, is characterized in that: by middle interface thread post separately, the both sides of pitman interface are respectively an interface thread post to two pitman interfaces simultaneously.
3. double nip screw according to claim 1, is characterized in that: fastening nut is connected with the interface thread post of pitman interface both sides by coupling screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420375713.1U CN203953793U (en) | 2014-07-09 | 2014-07-09 | A kind of double nip screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420375713.1U CN203953793U (en) | 2014-07-09 | 2014-07-09 | A kind of double nip screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203953793U true CN203953793U (en) | 2014-11-26 |
Family
ID=51914438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420375713.1U Expired - Fee Related CN203953793U (en) | 2014-07-09 | 2014-07-09 | A kind of double nip screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203953793U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104306060A (en) * | 2014-07-09 | 2015-01-28 | 吴爱悯 | Dual-port screw |
-
2014
- 2014-07-09 CN CN201420375713.1U patent/CN203953793U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104306060A (en) * | 2014-07-09 | 2015-01-28 | 吴爱悯 | Dual-port screw |
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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: 20141126 Termination date: 20170709 |