CN204121147U - A kind of Wicresoft lumbosacral spine locking axis is to fusion internal fixation system lock screw - Google Patents
A kind of Wicresoft lumbosacral spine locking axis is to fusion internal fixation system lock screw Download PDFInfo
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- CN204121147U CN204121147U CN201420495568.0U CN201420495568U CN204121147U CN 204121147 U CN204121147 U CN 204121147U CN 201420495568 U CN201420495568 U CN 201420495568U CN 204121147 U CN204121147 U CN 204121147U
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- screw
- wicresoft
- internal fixation
- fixation system
- system lock
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Abstract
The utility model discloses a kind of Wicresoft lumbosacral spine locking axis to fusion internal fixation system lock screw, comprise interconnective axial restraint screw and monodirectional locking screw, axial restraint screw is provided with some through holes, in through hole, is provided with female thread; One end of monodirectional locking screw is movably connected in through hole.Described axial restraint screw comprises screw front portion and screw rear portion, and screw front portion and screw rear portion are respectively arranged with a through hole.This utility model structure is simple, reasonable in design, can improve anti-rotation stability, and small end threaded portion rotates in the through hole of interlocking on axial restraint screw and carries out monodirectional locking, makes it not easily to exit, and has anti-rotation, incompressible, stretch-proof, counter-bending function.
Description
Technical field
This utility model belongs to medical instruments field, specifically, relates to a kind of Wicresoft lumbosacral spine locking axis to fusion internal fixation system lock screw.
Background technology
Lumbosacral fusion is a kind of common surgical mode of the diseases such as clinical treatment lumbosacral spine degenerated, shakiness.Current routine clinical anterior approach easy damaged internal organs, blood vessel and nerve, posterior approach is large to the interference of spinal column physiological function, does not meet the biomethanics structure of spinal column.In the recent decade, along with Wicresoft's theory and scientific and technical development, operation such as the Novel lumbar anterior minimally invasive being representative with peritoneoscope front road lockhole, mini-invasive incision, Percutaneous fixation fusion etc. achieves rapid progress.
All adopt the operation of outer putting property to merging internal fixtion between lumbosacral spine both at home and abroad at present, its wound is large, hemorrhage many, easy infection, and rehabilitation duration is long.Within 2004, proposed by the people such as Cragg of the U.S., the invasive surgery axially merging internal fixtion between lumbosacral spine is that Internal fixation technology is merged in a kind of new Wicresoft occurred in recent years, and be used widely in American-European countries, China from 2006 in clinical middle application, it is little that it has wound, goes out insufficiency of blood, not easy infection, the many merits such as rehabilitation is fast and remain the complete structure of spinal column, and its fusion internal fixtion rate is higher, the hospital stays is short.Therefore, the extremely favor of spinal surgeons, its clinical practice is also in the trend increased year by year.
But find that though lumbosacral spine axially merges internal fixtion and has better anteflexion and lateral stability in clinical studies, and poor on rotational stabilization.The internal fixation by nail-stick system of the lumbosacral spine way of escape is often needed to be aided with for improving anti-rotational stability, so axially fusion internal fixation operation and screw-rod internal fixation operation, and surgery cost is expensive, numerous compatriots are difficult to bear, and this operation technique is cumbersome, operating time is long, and wound increases thereupon, hemorrhagely also increases.
So invent a kind of for the lock screw of lumbosacral spine locking axis to fusion internal fixtion, just become a problem demanding prompt solution.
Summary of the invention
The technical problems to be solved in the utility model overcomes above-mentioned defect, provide a kind of structure simple, reasonable in design and Wicresoft's lumbosacral spine locking axis that can improve anti-rotation stability to fusion internal fixation system lock screw.
For solving the problem, the technical scheme that this utility model adopts is:
A kind of Wicresoft lumbosacral spine locking axis, to fusion internal fixation system lock screw, comprises interconnective axial restraint screw and monodirectional locking screw, axial restraint screw is provided with some through holes, is provided with female thread in through hole; One end of monodirectional locking screw is movably connected in through hole.
Described axial restraint screw comprises screw front portion and screw rear portion, and screw front portion and screw rear portion are respectively arranged with a through hole.
The other end of monodirectional locking screw is provided with six cylindrical end portions.
The anterior diameter of described screw is less than screw rear portion diameter, and screw front portion and screw rear portion are respectively arranged with screw thread.
The afterbody at described screw rear portion has endoporus, is provided with screw thread in endoporus, and is provided with occlusion breach.
Interior hexagonal is provided with in the rear-end endoporus of screw.
The shape of occlusion breach can be determined by actual needs, and the cross sectional shape of occlusion breach can be rectangle.
Described monodirectional locking screw comprises small end threaded portion and holds threaded portion greatly, and the screw thread of large end threaded portion is cancellous threads; Described small end threaded portion is connected with the through hole whorl on axial restraint screw.
The bottom of small end threaded portion is round bottom.
The small end threaded portion of monodirectional locking screw and the length of large end threaded portion are the most appropriate selections than between 1:1.2-1.8, and the diameter of small end threaded portion and large end threaded portion is than being 1:1.08-1.3.
The screw of axial restraint screw length that is anterior and screw rear portion is the most appropriate selection than between 1:0.5-2, and screw is anterior and the diameter ratio at screw rear portion is 1:1.05-2.
Owing to have employed above-mentioned technical scheme, compared with prior art, this utility model structure is simple, reasonable in design, anti-rotation stability can be improved, small end threaded portion rotates in the through hole of interlocking on axial restraint screw and carries out monodirectional locking, makes it not easily to exit, and has anti-rotation, incompressible, stretch-proof, counter-bending function.
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail simultaneously.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of embodiment of this utility model;
Fig. 2 is the structural representation of a kind of embodiment axial restraint of this utility model screw;
Fig. 3 is the structural representation of a kind of embodiment monodirectional locking of this utility model screw;
Fig. 4 is the right view of Fig. 2.
Detailed description of the invention
Embodiment:
As shown in Figure 1, a kind of Wicresoft lumbosacral spine locking axis, to fusion internal fixation system lock screw, comprises interconnective axial restraint screw and monodirectional locking screw 2, axial restraint screw is provided with some through holes 13, is provided with female thread in through hole 13; One end of monodirectional locking screw 2 is movably connected in through hole 13.
Described axial restraint screw comprises screw anterior 11 and screw rear portion 12, and screw anterior 11 and screw rear portion 12 are respectively arranged with a through hole 13.
The other end of monodirectional locking screw 2 is provided with six cylindrical end portions 21.
As shown in Figure 2, anterior 11 diameters of described screw are less than screw rear portion diameter 12, and screw anterior 11 and screw rear portion 12 are respectively arranged with screw thread.
As shown in Figure 4, the afterbody at described screw rear portion 12 has endoporus 15, is provided with screw thread and interior hexagonal in endoporus 15, and is provided with occlusion breach 14.The shape of occlusion breach 14 can be determined by actual needs, and the cross sectional shape of occlusion breach 14 can be rectangle.
As shown in Figure 3, described monodirectional locking screw 2 comprises small end threaded portion 22 and large end threaded portion 23, and the screw thread of large end threaded portion 23 is cancellous threads, and the bottom of small end threaded portion 22 is round bottom; Described small end threaded portion 22 is threaded with the through hole 13 on axial restraint screw.
Consider the problem of actual use, the small end threaded portion 22 of monodirectional locking screw 2 and the length of large end threaded portion 23 are the most appropriate selections than between (1:1.2)-(1:1.8), and the diameter of small end threaded portion 22 and large end threaded portion 23 is than being (1:1.08)-(1:1.3).Meanwhile, the length at screw anterior 11 and screw rear portion 12 is the most appropriate selection than between (1:0.5)-(1:2), and the diameter at screw anterior 11 and screw rear portion 12 is than being (1:1.05)-(1:2).In aforementioned proportion, incompressible, stretch-proof of the present utility model, bending resistance are best, and have best anti-rotation stability.
This utility model structure is simple, reasonable in design, can improve anti-rotation stability, and small end threaded portion rotates in the through hole of interlocking on axial restraint screw and carries out monodirectional locking, makes it not easily to exit, and has anti-rotation, incompressible, stretch-proof, counter-bending function.
This utility model is not limited to above-mentioned preferred forms, and anyone should learn the structure change made under enlightenment of the present utility model, and every have identical or akin technical scheme with this utility model, all belongs to protection domain of the present utility model.
Claims (10)
1. Wicresoft's lumbosacral spine locking axis is to a fusion internal fixation system lock screw, it is characterized in that: comprise interconnective axial restraint screw and monodirectional locking screw, axial restraint screw is provided with some through holes, is provided with female thread in through hole; One end of monodirectional locking screw is movably connected in through hole.
2. according to the Wicresoft's lumbosacral spine locking axis described in claim 1 to fusion internal fixation system lock screw, it is characterized in that: described axial restraint screw comprises the anterior and screw rear portion of screw, and screw front portion and screw rear portion are respectively arranged with a through hole.
3. according to the Wicresoft's lumbosacral spine locking axis described in claim 2 to fusion internal fixation system lock screw, it is characterized in that: the anterior diameter of described screw is less than screw rear portion diameter, the anterior and screw rear portion of screw is respectively arranged with screw thread.
4. according to the Wicresoft's lumbosacral spine locking axis described in claim 3 to fusion internal fixation system lock screw, it is characterized in that: the afterbody at described screw rear portion has endoporus, is provided with screw thread in endoporus, and is provided with occlusion breach.
5. according to the Wicresoft's lumbosacral spine locking axis described in claim 4 to fusion internal fixation system lock screw, it is characterized in that: in the rear-end endoporus of screw, be provided with interior hexagonal.
6. according to the Wicresoft's lumbosacral spine locking axis described in claim 4 to fusion internal fixation system lock screw, it is characterized in that: the cross sectional shape of occlusion breach can be rectangle.
7. according to the Wicresoft's lumbosacral spine locking axis described in claim 1 to fusion internal fixation system lock screw, it is characterized in that: described monodirectional locking screw comprises small end threaded portion and holds threaded portion greatly, the screw thread holding greatly threaded portion is cancellous threads; Described small end threaded portion is connected with the through hole whorl on axial restraint screw.
8. according to the Wicresoft's lumbosacral spine locking axis described in claim 7 to fusion internal fixation system lock screw, it is characterized in that: the bottom of small end threaded portion is round bottom.
9. according to the Wicresoft's lumbosacral spine locking axis described in claim 7 to fusion internal fixation system lock screw, it is characterized in that: the length of the small end threaded portion of axial monodirectional locking screw and large end threaded portion is than at 1:(1.2-1.8) between be the most appropriate selection, and the diameter of small end threaded portion and large end threaded portion is than being 1:(1.08-1.3).
10. according to the Wicresoft's lumbosacral spine locking axis described in claim 7 to fusion internal fixation system lock screw, it is characterized in that: the screw front portion of hold-down screw and the length ratio at screw rear portion are at 1:(0.5-2), and screw is anterior and the diameter ratio at screw rear portion is 1:(1.05-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420495568.0U CN204121147U (en) | 2014-08-29 | 2014-08-29 | A kind of Wicresoft lumbosacral spine locking axis is to fusion internal fixation system lock screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420495568.0U CN204121147U (en) | 2014-08-29 | 2014-08-29 | A kind of Wicresoft lumbosacral spine locking axis is to fusion internal fixation system lock screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204121147U true CN204121147U (en) | 2015-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420495568.0U Expired - Fee Related CN204121147U (en) | 2014-08-29 | 2014-08-29 | A kind of Wicresoft lumbosacral spine locking axis is to fusion internal fixation system lock screw |
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| Country | Link |
|---|---|
| CN (1) | CN204121147U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104173099A (en) * | 2014-08-29 | 2014-12-03 | 南华大学 | Locking screw of minimally invasive lumbosacral vertebrae locking axial fusion internal fixation system |
-
2014
- 2014-08-29 CN CN201420495568.0U patent/CN204121147U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104173099A (en) * | 2014-08-29 | 2014-12-03 | 南华大学 | Locking screw of minimally invasive lumbosacral vertebrae locking axial fusion internal fixation system |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150128 Termination date: 20180829 |