CN204446085U - The hollow Universal pedicle screw of two pitch airscrew - Google Patents
The hollow Universal pedicle screw of two pitch airscrew Download PDFInfo
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- CN204446085U CN204446085U CN201420863056.5U CN201420863056U CN204446085U CN 204446085 U CN204446085 U CN 204446085U CN 201420863056 U CN201420863056 U CN 201420863056U CN 204446085 U CN204446085 U CN 204446085U
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- ailhead
- screw body
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Abstract
The hollow Universal pedicle screw of a kind of two pitch airscrew, comprise screw body and ailhead, arrange screw thread at screw body outer peripheral face, ailhead is arranged on the side of screw body, and the same screw thread on screw body has two kinds of different pitch.In the hollow Universal pedicle screw of two pitch airscrew of the present utility model, the nearly far-end of screw is different pitch, can in bone or the bone with harder extra cortical region and softer spongiosa interior zone there is best constant intensity, at utmost decompose screw stress, strengthen going out property of resistance to plucking, screw body is equipped with hollow hole, by guide pin as guiding, exactly screw pedicle is screwed into vertebral body, and contributes to maintaining boring; Prevent screw loosening, slippage, and exactly screw pedicle can be screwed into vertebral body to reduce operation technique difficulty, improve therapeutic effect.
Description
Technical field
This utility model belongs to the technical field of orthopaedic medical treatment operating theater instruments, is the hollow Universal pedicle screw of a kind of two pitch airscrew specifically.
Background technology
At present, pedicle screw is used in the important means of the treatments such as spinal trauma, skeleton pathological changes or malformation correction.Pedicle screw is the internal fixation apparatus that treatment spinal column is the most frequently used both at home and abroad at present, existing pedicle screw is roughly the same, easily occur screw loosening, slippage causes internal fixation system to bend, fracture, screw placement is inaccurate, thus affects surgical quality or operative failure.
Summary of the invention
The purpose of this utility model is exactly for above-mentioned the deficiencies in the prior art, provides a kind of two pitch airscrew hollow Universal pedicle screw.
The technical scheme that this utility model is taked for the technical problem existed in solution known technology is:
The hollow Universal pedicle screw of two pitch airscrew of the present utility model, comprises screw body and ailhead, arranges screw thread at screw body outer peripheral face, and ailhead is arranged on the side of screw body, and the same screw thread on screw body has two kinds of different pitch.
This utility model can also adopt following technical measures:
Described screw body is less than the thread pitch away from ailhead side near the thread pitch of ailhead side.
Described screw body is hollow-core construction.
The advantage that this utility model has and good effect are:
In the hollow Universal pedicle screw of two pitch airscrew of the present utility model, the nearly far-end of screw is different pitch, is equipped with hollow hole, by guide pin as guiding, exactly screw pedicle is screwed into vertebral body, and contributes to maintaining boring; Prevent screw loosening, slippage, and exactly screw pedicle can be screwed into vertebral body, can in bone or the bone with harder extra cortical region and softer spongiosa interior zone there is best constant intensity, at utmost decompose screw stress, strengthen going out property of resistance to plucking, to reduce operation technique difficulty, improve therapeutic effect.
Accompanying drawing explanation
Fig. 1 is the hollow Universal pedicle screw schematic diagram of two pitch airscrew of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, the hollow Universal pedicle screw of this utility model two pitch airscrew is described further.
As shown in Figure 1, the hollow Universal pedicle screw of two pitch airscrew of the present utility model, comprise screw body 1 and ailhead 2, arrange screw thread at screw body outer peripheral face, ailhead is arranged on the side of screw body, and the same screw thread on screw body has two kinds of different pitch.
As seen from the figure, screw body is less than the screw thread 3b pitch away from ailhead side near the screw thread 3a pitch of ailhead side.Two kinds of different pitch screws correspond respectively in bone or have the bone of harder extra cortical region and softer spongiosa interior zone, so screw body has corresponding constant intensity for zones of different, at utmost decompose screw stress, make fixing more firm.
Screw body is hollow-core construction (not shown), and screw body arranges the hollow hole coaxial with screw body, and hollow hole runs through screw body, by guide pin as guiding, exactly screw pedicle can be screwed into vertebral body.
The above, it is only preferred embodiment of the present utility model, not any pro forma restriction is done to this utility model, although this utility model with preferred embodiment openly as above, but, and be not used to limit this utility model, any those skilled in the art, do not departing within the scope of technical solutions of the utility model, certainly the technology contents of announcement can be utilized to make a little change or modification, become the Equivalent embodiments of equivalent variations, in every case be the content not departing from technical solutions of the utility model, according to any simple modification that technical spirit of the present utility model is done above embodiment, equivalent variations and modification, all belong in the scope of technical solutions of the utility model.
Claims (3)
1. the hollow Universal pedicle screw of two pitch airscrew, comprises screw body and ailhead, arranges screw thread at screw body outer peripheral face, and ailhead is arranged on the side of screw body, it is characterized in that, the same screw thread on screw body has two kinds of different pitch.
2. the hollow Universal pedicle screw of two pitch airscrew according to claim 1, is characterized in that: screw body is less than the thread pitch away from ailhead side near the thread pitch of ailhead side.
3. the hollow Universal pedicle screw of two pitch airscrew according to claim 1, is characterized in that: screw body is hollow-core construction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420863056.5U CN204446085U (en) | 2014-12-31 | 2014-12-31 | The hollow Universal pedicle screw of two pitch airscrew |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420863056.5U CN204446085U (en) | 2014-12-31 | 2014-12-31 | The hollow Universal pedicle screw of two pitch airscrew |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204446085U true CN204446085U (en) | 2015-07-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420863056.5U Active CN204446085U (en) | 2014-12-31 | 2014-12-31 | The hollow Universal pedicle screw of two pitch airscrew |
Country Status (1)
| Country | Link |
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| CN (1) | CN204446085U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108670399A (en) * | 2018-06-13 | 2018-10-19 | 迪恩医疗科技有限公司 | The universal unidirectional unification pedicle of vertebral arch screw of vertebral column minimally invasive nails on nail system |
-
2014
- 2014-12-31 CN CN201420863056.5U patent/CN204446085U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108670399A (en) * | 2018-06-13 | 2018-10-19 | 迪恩医疗科技有限公司 | The universal unidirectional unification pedicle of vertebral arch screw of vertebral column minimally invasive nails on nail system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |