CN2768694Y - Vertebral pedicle nail fixer for cervical vertebrae - Google Patents
Vertebral pedicle nail fixer for cervical vertebrae Download PDFInfo
- Publication number
- CN2768694Y CN2768694Y CN 200520095325 CN200520095325U CN2768694Y CN 2768694 Y CN2768694 Y CN 2768694Y CN 200520095325 CN200520095325 CN 200520095325 CN 200520095325 U CN200520095325 U CN 200520095325U CN 2768694 Y CN2768694 Y CN 2768694Y
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- CN
- China
- Prior art keywords
- screw
- shaped groove
- fixing device
- type groove
- nail fixing
- 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
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- 230000007547 defect Effects 0.000 abstract 1
- 238000005259 measurement Methods 0.000 abstract 1
- 229910000831 Steel Inorganic materials 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000006837 decompression Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
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Abstract
The utility model relates to a cervical vertebrae vertebral arch pedicle nail fixing device, which solves the defect of poor stability or high cost in the prior art. The utility model provides the cervical vertebrae vertebral arch pedicle nail fixing device which has the advantages of firm fixation, convenient placement and low cost, comprises a screw, a connecting bar and a fastening screw plug, and is characterized in that the top end of the screw is provided with a U-shaped groove, inner screw threads are arranged in the U-shaped groove, and the fastening screw plug is provided with outer screw threads. The inner screw threads of the U-shaped groove and the outer screw threads of the fastening screw plug can be mutually matched by screw threads and are locked tightly. The connecting bar can be placed in the U-shaped groove at the top end of the screw and can be positioned and tightly locked in the U-shaped groove through the screw thread match of the fastening screw plug and the U-shaped groove. The cervical vertebrae vertebral arch pedicle nail fixing device of the utility model has the characteristics of light structure, firm fixation, simple operative operation, low cost, etc., through the proof of biomechanics measurement and clinical trial.
Description
Technical field:
This utility model relates to a kind of medical apparatus and instruments, particularly relates to a kind of pedicle for cervical vertebra arch nail fixing device.
Background technology:
At present domestic and international posterior cervical pedicle of vertebral arch (lateral mass) internal fixation device adopts the nail-plate fixed system mostly.As: the Steffee steel plate of improvement, Axis steel plate, reconstruction plate etc.Between these apparatus nail-plates chucking power a little less than, make fixed less stable, and put inconvenience, though external import has posterior cervical internal fixation devices such as Servifix and Starlock, but the former screw and no clamping action of fixture block self, fix by tightening behind the screw bone and fixture block, though the latter has clamping, nail is fixing by bar bridge and rod in the side.Promptly rod is in the side of screw, the putting of unfavorable rod, and operation such as decompression bone grafting.Remove this, the universal nail-stick system of Polyaxioc Serew is abroad arranged at present, easy and simple to handle, but cost an arm and a leg.
The utility model content:
The purpose of this utility model is to provide a kind of fixation, places the pedicle for cervical vertebra arch nail fixing device convenient, that cost is low.
The technical solution of the utility model is as follows: it comprises screw, pitman, fastening plug screw.It is characterized in that: be provided with U type groove on the top of screw, be provided with female thread in U type groove, fastening plug screw is an external screw thread, and the female thread of U type groove can be locked with the mutual threaded engagement of the external screw thread of fastening plug screw; Pitman can be placed in the U type groove of screw head, can be with the pitman positioning and locking in U type groove by the threaded engagement of fastening plug screw and U type groove.
Pedicle for cervical vertebra arch nail fixing device of the present utility model, through biological mechanics determining and clinic trial confirm to have that structure is small and exquisite, characteristics such as fixation, operation technique are simple, with low cost.Because the screw threads for fastening mode that this utility model adopts the female thread of screw head to cooperate with the external screw thread of fastening plug screw makes the contour structures of screw head smaller and more exquisite.Owing to adopted the anti-ring that rises, made fixing more firm.
Description of drawings:
Fig. 1 is a kind of structural representation of the present utility model.
Fig. 2 is the vertical view of Fig. 1.
Label declaration: 1 screw, 2 pitmans, 3 fastening plug screws, the 4 anti-rings that rise.
The specific embodiment:
As shown in Figure 1, this utility model comprises screw 1, pitman 2, fastening plug screw 3, the anti-ring 4 that rises.It is characterized in that: be provided with U type groove on the top of screw 1, in U type groove, be provided with female thread, the fastening plug screw 3 outer external screw threads that are provided with, the female thread of U type groove can be locked with the mutual threaded engagement of the external screw thread of fastening plug screw; Pitman 2 can be placed in the screw 1 vertical U type groove, can be with the pitman positioning and locking in U type groove by the threaded engagement of fastening plug screw and U type groove.By the U type screw more than two or two is fixed on the same pitman and adjacent vertebral body can be coupled together, reach fixation.In order to prevent that screw 1 vertical U type groove from outwards deforming, outside U type groove, also be with the anti-ring 4 that rises.
For the ease of the locking of fastening plug screw 3, be provided with the inner polygon hole at the center of fastening plug screw 3, this polygonal hole especially with interior hexagonal hole for well.
In use, the U type part of screw 1 that growing the anti-ring 4 that rises is broken, and the top that makes screw 1 and the anti-ring 4 that rises is with high or lower slightly.Perhaps screw 1 is directly made with the anti-ring 4 that rises high or lower slightly together.
Claims (4)
1, a kind of pedicle for cervical vertebra arch nail fixing device, it comprises screw (1), pitman (2), fastening plug screw (3), it is characterized in that: be provided with U type groove on the top of screw (1), in U type groove, be provided with female thread, fastening plug screw (3) is an external screw thread, and the female thread of U type groove can be locked with the mutual threaded engagement of the external screw thread of fastening plug screw; Pitman (2) can be placed in the U type groove of screw head, can be with pitman (2) positioning and locking in U type groove by the fastening plug screw (3) and the threaded engagement of U type groove.
2, pedicle for cervical vertebra arch nail fixing device according to claim 1 is characterized in that: it also comprises the anti-ring (4) that rises, and the anti-ring (4) that rises is enclosed within outside the vertical U type of screw (1) groove.
3, pedicle for cervical vertebra arch nail fixing device according to claim 2 is characterized in that: the center at fastening plug screw (3) is provided with the inner polygon hole.
4, pedicle for cervical vertebra arch nail fixing device according to claim 3 is characterized in that: described inner polygon hole is an inner hexagonal hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520095325 CN2768694Y (en) | 2005-02-20 | 2005-02-20 | Vertebral pedicle nail fixer for cervical vertebrae |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520095325 CN2768694Y (en) | 2005-02-20 | 2005-02-20 | Vertebral pedicle nail fixer for cervical vertebrae |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2768694Y true CN2768694Y (en) | 2006-04-05 |
Family
ID=36689774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520095325 Expired - Fee Related CN2768694Y (en) | 2005-02-20 | 2005-02-20 | Vertebral pedicle nail fixer for cervical vertebrae |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2768694Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101803944A (en) * | 2010-03-26 | 2010-08-18 | 王春 | pedicle screw |
| CN101732086B (en) * | 2009-11-14 | 2011-06-15 | 常州鼎健医疗器械有限公司 | Pedicle nail with shape correcting function |
-
2005
- 2005-02-20 CN CN 200520095325 patent/CN2768694Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101732086B (en) * | 2009-11-14 | 2011-06-15 | 常州鼎健医疗器械有限公司 | Pedicle nail with shape correcting function |
| CN101803944A (en) * | 2010-03-26 | 2010-08-18 | 王春 | pedicle screw |
| CN101803944B (en) * | 2010-03-26 | 2011-09-28 | 王春 | Pedicle screw |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060405 |