CN203089339U - Vertebral body fixator - Google Patents
Vertebral body fixator Download PDFInfo
- Publication number
- CN203089339U CN203089339U CN 201320066629 CN201320066629U CN203089339U CN 203089339 U CN203089339 U CN 203089339U CN 201320066629 CN201320066629 CN 201320066629 CN 201320066629 U CN201320066629 U CN 201320066629U CN 203089339 U CN203089339 U CN 203089339U
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- CN
- China
- Prior art keywords
- screw
- head
- longitudinal rod
- vertebral body
- shaped clamp
- 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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Abstract
The utility model discloses a vertebral body fixator. The vertebral body fixator comprises a pedicle screw which is fixedly connected with a longitudinal rod. The pedicle screw is composed of a screw head and screw rods. A longitudinal cambered surface which is matched with the longitudinal rod is arranged on the top surface of the screw head. Bosses are arranged on two sides of the lower portion of the screw head. Inverted-U-shaped clamping plates are mounted on the screw head, two ends of the inverted-U-shaped clamping plates are provided with inward bends, the bends are tightly clamped under the bosses of the screw head, and thus the pedicle screw and the longitudinal rod are tightly clamped and fixed together. The vertebral body fixator changes a traditional connecting mode that a screw is used for tightly pressing the longitudinal rod thoroughly, the inverted-U-shaped clamping plates are used for clamping, connection is firm and reliable, dismounting is quick and convenient, the height of the screw head of the pedicle screw is lowered especially, and correspondingly the size of the screw head is reduced. Therefore, operation harm is reduced, and operation quality is improved.
Description
Technical field
This utility model relates to the orthopedic medical device technical field, particularly relates to a kind of spinal fixing device.
Background technology
At present, when treatment vertebral disease or damage, relatively effective measures are to utilize spinal fixing device that vertebra is carried out fixing operation.Spinal fixing device mostly is made of longitudinal rod and pedicle nail, and the mode that is connected and fixed of longitudinal rod and pedicle nail has direct influence to surgical effect and quality.The head of screw of pedicle nail commonly used partly has the U-shaped breach, the U-shaped breach is divided into left and right sides two parts with head of screw, the two-part inboard of head of screw has female thread, and longitudinal rod is placed in the U-shaped breach, utilizes the housing screw that is spun in the head of screw that longitudinal rod and pedicle nail are fixed together.This not only the operation inadequately by the fastening means that screws screw makes things convenient for, and housing screw struts the head of screw of pedicle nail deviate from easily, cause operative failure, that is to say that the pedicle nail head of screw wants not make the housing screw slippage, not only manufactured materials requires height, and must have certain altitude, and is big thereby the operation back takes up room in human body, influence operation quality increases patient's misery.The patent No. is that 97182195.X's " device that connects longitudinal rod and root screw " and the patent No. is 200680055521.0 " fixture of vertebra " though from different perspectives traditional spinal fixing device is improved, but still does not eliminate above-mentioned defective.The patent No. is that 200720077446.X's " spinal fixation screw " utility model has increased cover plate and biside plate on the traditional structure basis, though reduced the risk of housing screw slippage, but do not make dismounting convenient yet, and increased the volume of pedicle nail head of screw virtually.
Summary of the invention
The purpose of this utility model is exactly the defective that will overcome prior art, and the firm and reliable connection of a kind of longitudinal rod and pedicle nail, the spinal fixing device that the dismounting operation is quick and convenient, volume is littler are provided.
For achieving the above object, this utility model is by the following technical solutions: it comprises the pedicle nail of fixedlying connected with longitudinal rod, pedicle nail is made of head of screw and shank of screw, the end face of head of screw has the cambered surface that cooperates with longitudinal rod longitudinally, the both sides, bottom of head of screw have boss, the anti-U-shaped clamp that longitudinal rod is pressed on the head of screw end face is installed on head of screw, the two ends of anti-U-shaped clamp have inside bending, this bending is clamped on below the boss of head of screw, pedicle nail is fixedly clamped with longitudinal rod is in the same place.
Above-mentioned vertebral body holder respectively has a positioning convex in the both sides of its head of screw, has the spacing hole corresponding with this positioning convex position on anti-U-shaped clamp, and the two is in conjunction with the length travel slippage of avoiding equipping anti-U-shaped clamp in back and head of screw.
Above-mentioned vertebral body holder has inboard acclivitous inclination angle at the boss lower surface of its head of screw, the upper surface of anti-U-shaped clamp two ends bending also is and the corresponding to inclined-plane of boss lower surface that the two laterally opens slippage in conjunction with avoiding that the anti-U-shaped clamp in back is installed from head of screw.
Above-mentioned vertebral body holder also has the oblique angle at the two ends of head of screw boss, so that the installation of anti-U-shaped clamp and the two is compressed better.
This utility model has thoroughly changed the traditional connected mode by the screw in compression longitudinal rod, but the mode that adopts anti-U-shaped clamp to clamp, with the head of screw and the longitudinal rod chucking of pedicle nail, there is not the possibility of slippage in this connected mode, firm and reliable connection, thereby reduced operation risk.And simple in structure, without rotary screw, utilize specific purpose tool once can or throw off during dismounting with pedicle nail and longitudinal rod chucking, swift and convenient to operate.The particularly important is, this utility model has reduced the height of pedicle nail head of screw greatly, has reduced volume, that is can reduce its postoperative and take up space in human body, thereby reduces surgical injury, reduces infection chance, reduces patient's misery, has improved the operation quality.
Below in conjunction with drawings and Examples this utility model is further described.
Description of drawings
Fig. 1 is an axonometric chart of the present utility model;
Fig. 2 is a front view of the present utility model;
Fig. 3 is the right view of Fig. 1;
Fig. 4 is the front view of pedicle nail;
Fig. 5 is the right view of Fig. 4;
Fig. 6 is the head of screw of pedicle nail and the sketch map that anti-U-shaped clamp is assembled together;
Fig. 7 is equipment figure of the present utility model;
Fig. 8 is an installation special tool structure chart of the present utility model;
Fig. 9 is this utility model installation process sketch map;
Figure 10 is a dismounting specific purpose tool structure chart of the present utility model;
Figure 11 is this utility model unloading process sketch map.
The specific embodiment
In Fig. 1-7 illustrated embodiment, this utility model is linked together by longitudinal rod 1, pedicle nail 2 and anti-U-shaped clamp 3 three parts and constitutes.Pedicle nail 2 comprises head of screw 4 and shank of screw 5, the end face of head of screw 4 has cambered surface longitudinally, in order to cooperate with longitudinal rod 1, both sides, head of screw 4 bottom have boss 6, the top of anti-U-shaped clamp 3 is arc, the two ends, bottom have inside bending, and this bending is clamped on below the boss 6 of head of screw, and longitudinal rod 1 is pressed on the head of screw 4.The length of anti-U-shaped clamp 3 is consistent with the longitudinal length of head of screw 4.The positioning convex 7 that respectively has a circle in the both sides of head of screw 4 respectively has a spacing hole 8 in anti-U-shaped clamp 3 two sides, back positioning convex 7 is installed is positioned at spacing hole 8, plays the effect of anti-U-shaped clamp of restriction and head of screw length travel.Certainly, also can be processed with groove or blind hole, play the effect of spacing hole equally in inboard, anti-U-shaped clamp 3 side.Boss 6 lower surfaces of head of screw have inboard acclivitous inclination angle, and the upper surface of anti-U-shaped clamp 3 two ends bending also is and the corresponding to inclined-plane of boss 6 lower surfaces to make the two can laterally not open slippage from head of screw in conjunction with the anti-U-shaped clamp in back.Boss 6 two ends of head of screw can be processed with the oblique angle, so that the installation of anti-U-shaped clamp 3 also can be pressed on longitudinal rod 1 on the head of screw 4 better.
During installation, earlier pedicle nail is screwed into vertebral body, anti-U-shaped clamp is enclosed within on the longitudinal rod, then longitudinal rod is placed in the head of screw end face, boss with the bending alignment screw head of anti-U-shaped clamp, utilize pincerlike anti-U-shaped clamp of special installation tool clamping and head of screw move toward one another, can longitudinal rod and pedicle nail be tightened together by anti-U-shaped clamp.During dismounting, utilize pincerlike anti-U-shaped clamp of removal tool special clamping and head of screw adverse movement, anti-U-shaped clamp and head of screw can be thrown off, thereby longitudinal rod is separated with pedicle nail.
Claims (4)
1. vertebral body holder, comprise the pedicle nail (2) by head of screw (4) and shank of screw (5) formation of fixedlying connected with longitudinal rod (1), it is characterized in that: the end face of head of screw (4) has the cambered surface that matches with longitudinal rod (1) longitudinally, the both sides, bottom of head of screw (4) have boss (6), the anti-U-shaped clamp (3) that longitudinal rod (1) is pressed on head of screw (4) end face is installed on head of screw (4), the two ends of anti-U-shaped clamp (3) have inside bending, and this bending is clamped on below the boss (6) of head of screw.
2. vertebral body holder according to claim 1 is characterized in that respectively having a positioning convex (7) in the both sides of head of screw (4), has the spacing hole (8) corresponding with this positioning convex (7) position on anti-U-shaped clamp (3).
3. vertebral body holder according to claim 1 is characterized in that boss (6) lower surface of head of screw has inboard acclivitous inclination angle, and the upper surface of anti-U-shaped clamp (3) two ends bending also is and the corresponding to inclined-plane of boss (6) lower surface.
4. vertebral body holder according to claim 1 is characterized in that boss (6) two ends at head of screw have the oblique angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320066629 CN203089339U (en) | 2013-01-28 | 2013-01-28 | Vertebral body fixator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320066629 CN203089339U (en) | 2013-01-28 | 2013-01-28 | Vertebral body fixator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203089339U true CN203089339U (en) | 2013-07-31 |
Family
ID=48840792
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320066629 Expired - Fee Related CN203089339U (en) | 2013-01-28 | 2013-01-28 | Vertebral body fixator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203089339U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103070724A (en) * | 2013-01-28 | 2013-05-01 | 山东航维骨科医疗器械股份有限公司 | Vertebral body fixer |
| CN109077792A (en) * | 2018-11-02 | 2018-12-25 | 河北瑞鹤医疗器械有限公司 | Unilateral nail holding device |
-
2013
- 2013-01-28 CN CN 201320066629 patent/CN203089339U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103070724A (en) * | 2013-01-28 | 2013-05-01 | 山东航维骨科医疗器械股份有限公司 | Vertebral body fixer |
| CN103070724B (en) * | 2013-01-28 | 2015-08-05 | 山东航维骨科医疗器械股份有限公司 | Pyramid fixator |
| CN109077792A (en) * | 2018-11-02 | 2018-12-25 | 河北瑞鹤医疗器械有限公司 | Unilateral nail holding device |
| CN109077792B (en) * | 2018-11-02 | 2024-02-09 | 河北瑞鹤医疗器械有限公司 | Single-side nail holder |
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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: 20130731 Termination date: 20160128 |
|
| EXPY | Termination of patent right or utility model |