CN203208107U - Screw spike for bone surgery - Google Patents
Screw spike for bone surgery Download PDFInfo
- Publication number
- CN203208107U CN203208107U CN 201320036724 CN201320036724U CN203208107U CN 203208107 U CN203208107 U CN 203208107U CN 201320036724 CN201320036724 CN 201320036724 CN 201320036724 U CN201320036724 U CN 201320036724U CN 203208107 U CN203208107 U CN 203208107U
- Authority
- CN
- China
- Prior art keywords
- spike
- screw
- bone surgery
- screw thread
- nail
- 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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- Surgical Instruments (AREA)
Abstract
The utility model discloses a screw spike for bone surgery, and belongs to the technical field of medical equipment. The screw spike is mainly composed of a spike base and a spike rod. Threads on the surface of the spike rod comprise a lower thread and an upper thread. The spiral direction of the lower thread and the spiral direction of the upper thread are opposite, and a groove shaped like a Chinese character 'mi' is formed in the top of the spike base. Due to the fact that the surface of the spike rod is provided with the two threads with the opposite spiral directions, when the screw spike is used in the bone surgery, the axial resultant force produced by the upper thread and the lower thread is zero, and a pedicle screw does not produce axial force. Due to the fact that the groove shaped like the Chinese character 'mi' is formed in the spike base, the screw spike can be screwed tightly through a cross-shaped screw driver or a screw driver shaped like the Chinese character 'mi'. The screw spike for the bone surgery has the advantages of being firm, safe and convenient to use.
Description
Technical field
This utility model belongs to technical field of medical instruments, is specifically related to a kind of Orthopeadic Surgery screw.
Background technology
In bone surgery, often need to use the screwdriver nail that tightens the screw, the drive screw of bone surgery use at present mainly is made up of nail seat and nail bar, the screw thread of nail bar all is that folk prescription is to the rotation screw thread, the threaded rod of single-rotating direction is easy to generate axial force, it is loosening to cause screw to occur, screw looses from operative site easily when serious, have a strong impact on the bone surgery effect, and the groove of the screw ailing seat of bone surgery use mostly is in-line greatly, the in-line groove causes screwdriver to slide easily, and safety is poor.
Summary of the invention
The purpose of this utility model provides a kind of Orthopeadic Surgery screw, solves prior art and is easy to generate axial force and causes screw loosening even get loose and the problem of poor stability.
This utility model mainly is made up of nail seat and nail bar, and the screw thread that solves technical scheme that its technical problem adopts and be nail bar surface comprises screw thread and last screw thread down, and the hand of spiral of following screw thread and last screw thread is opposite, and a nail top arranges the M shape groove.
The beneficial effects of the utility model are that nail bar surface arranges two screw threads that the hand of spiral is opposite up and down, and when being used for bone surgery, axially making a concerted effort that screw thread produces up and down is zero, and pedicle nail can not produce axial force like this; Nail seat arranges the M shape groove simultaneously, can use Philips screwdriver also can use the M shape screwdriver nail that tightens the screw, and has advantage firm, safe and easy to use.
Description of drawings
Below in conjunction with the drawings and specific embodiments this utility model is further specified.
Fig. 1 is structural representation of the present utility model;
Fig. 2 is schematic top plan view of the present utility model.
Screw thread, 5 M shape grooves on 1 nail seat among the figure, 2 nail bars, the 3 times screw threads, 4.
The specific embodiment
As depicted in figs. 1 and 2, a kind of Orthopeadic Surgery screw mainly is made up of nail seat 1 and nail bar 2, and the screw thread on nail bar 2 surfaces comprises screw thread 3 and last screw thread 4 down, and the hand of spiral of following screw thread 3 and last screw thread 4 is opposite, and nail seat 1 top arranges M shape groove 5.
Claims (1)
1. an Orthopeadic Surgery screw mainly is made up of nail seat and nail bar, it is characterized in that the screw thread of following closely the bar surface comprises screw thread and last screw thread down, and the hand of spiral of following screw thread and last screw thread is opposite, and nail seat top arranges the M shape groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320036724 CN203208107U (en) | 2013-01-21 | 2013-01-21 | Screw spike for bone surgery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320036724 CN203208107U (en) | 2013-01-21 | 2013-01-21 | Screw spike for bone surgery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203208107U true CN203208107U (en) | 2013-09-25 |
Family
ID=49197688
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320036724 Expired - Fee Related CN203208107U (en) | 2013-01-21 | 2013-01-21 | Screw spike for bone surgery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203208107U (en) |
-
2013
- 2013-01-21 CN CN 201320036724 patent/CN203208107U/en not_active Expired - Fee Related
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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: 20130925 Termination date: 20140121 |