CN206138198U - Vertebral pedicle screw - Google Patents
Vertebral pedicle screw Download PDFInfo
- Publication number
- CN206138198U CN206138198U CN201620956778.4U CN201620956778U CN206138198U CN 206138198 U CN206138198 U CN 206138198U CN 201620956778 U CN201620956778 U CN 201620956778U CN 206138198 U CN206138198 U CN 206138198U
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- CN
- China
- Prior art keywords
- jackscrew
- pitman
- nail seat
- pedicle screw
- screw
- 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.)
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- Surgical Instruments (AREA)
Abstract
The utility model relates to the technical field of medical equipment, concretely relates to vertebral pedicle screw, including screw, nail seat, jackscrew and connective bar, the nail seat is equipped with U type recess on locating the screw on the nail seat, and the jackscrew holding is in U type recess, and the connective bar passes U type recess from the bottom of jackscrew, and the jackscrew supports with the connective bar and holds, the transversal U type of personally submitting of connective bar. The utility model discloses a vertebral pedicle screw changes the U type into through connecting rod -shaped, divides the normal pressure equally under equal locking effect, reduces the jackscrew and explodes an incidence.
Description
Technical field
This utility model is related to technical field of medical instruments, and in particular to a kind of pedicle screw.
Background technology
At present, it is unstable for spinal trauma, slippage, degenerative disease and other single hops or several sections of fracture postcentrum, adopt more
Fixed with spine fixator.Holder kind now on the market is more, but major part all passes through pedicle screw, pedicle of vertebral arch ten thousand
To other corresponding component compositions such as screw, pitman.Modal problem is pedicle screw and be connected in existing holder
Rod is less than normal due to linear contact lay frictional force, makes the applying direction of power uncontrollable, and screwing when jackscrew compresses connection unbalance loading is easily produced,
So that jackscrew, pedicle screw screw thread produce breakoff phenomenon, i.e., quick-fried silk, so as to cause the failure of implant.
Utility model content
The purpose of this utility model is to provide a kind of pedicle screw, U-shaped by the way that connection rod shape is changed to, and is locking on an equal basis
Determine to divide normal pressure under effect equally, reduce the quick-fried silk incidence rate of jackscrew.
For achieving the above object, the technical scheme that this utility model is adopted is：A kind of pedicle screw, the pedicle of vertebral arch
Screw includes screw, nail seat, jackscrew and pitman, and on screw, nail seat is provided with U-shaped groove to nail seat, and jackscrew is placed in U-shaped
In groove, pitman passes through U-shaped groove, jackscrew to support with pitman from the bottom of jackscrew, and the cross section of pitman is U-shaped.
Preferably, the inwall of the U-shaped groove is provided with screw thread, and jackscrew is spirally connected with nail seat.
Preferably, the matching form of the U-shaped pitman and U-shaped groove is closed, pitman and nail seat interference fit.
Preferably, the material of the pitman is titanium alloy.
After above-mentioned technical proposal, this utility model has the positive effect that：
The cross section of the pitman in this utility model is U-shaped, and the shape of existing pitman is circle, using U-shaped
It is advantageous in that, can make that jackscrew contacts with pitman is more stable, and pitman can be divided equally under the equal locking effect of jackscrew
Normal pressure, reduces the quick-fried silk incidence rate of jackscrew.And the U-shaped shape facility of itself can be reduced horizontal company and used probability with anti-rotation.And U
The cylinder of type is bigger than the resistance to intensity of column type, can suitably reduce pitman size, so that whole pedicle screw system size subtracts
It is little.
Description of the drawings
Fig. 1 is vertebral pedicle bolt structure figure of the present utility model；
Fig. 2 is the pitman structure chart in this utility model.
Wherein：1st, screw, 2, nail seat.3rd, jackscrew, 4, pitman.
Specific embodiment
This utility model is described in further detail with reference to the accompanying drawings and detailed description.
In this utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. term should broadly understood, it is for example, it may be fixedly connected, or be detachably connected or integral；Can be
It is mechanically connected, or electrically connects；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two
The connection of element internal or the interaction relationship of two elements.For the ordinary skill in the art, can basis
Concrete condition understands concrete meaning of the above-mentioned term in this utility model.
As shown in Figure 1-2, it is pedicle screw of the present utility model, it includes screw 1, nail seat 2, jackscrew 3 and pitman
4, on screw 1, nail seat 2 is provided with U-shaped groove to nail seat 2, and jackscrew 3 is placed in U-shaped groove.The inwall of U-shaped groove is provided with
Female thread, the outer wall of jackscrew 3 is provided with external screw thread so that jackscrew 3 is spirally connected with nail seat 2.Pitman 4 passes through U-shaped from the bottom of jackscrew 3
Groove.The cross section of pitman 4 is U-shaped, and U-shaped pitman 4 is closed with the matching form of U-shaped groove, pitman 4 and the mistake of nail seat 2
It is full of cooperation, mutually supports therebetween.
Pitman 4 is made from titanium alloy material.
Pitman in this utility model by change its cross section shape, the circle of easy torsional slip is changed to it is U-shaped,
So that jackscrew 3 is more stable with what pitman 4 was contacted, pitman 4 can divide normal pressure equally under the equal locking effect of jackscrew 3,
Reduce by 3 quick-fried incidence rates of jackscrew.Meanwhile, U-shaped pitman 4 is big compared to the resistance to intensity of the structure of column type, in equal stress feelings
The size of pitman 4 can suitably be reduced under condition, and then reduce whole pedicle screw system size.
It will be apparent to those skilled in the art that technical scheme that can be as described above and design, make other various
It is corresponding to change and deformation, and all these change and deformation should all belong to the protection domain of this utility model requirement
Within.
Claims (4)
1. a kind of pedicle screw, it is characterised in that：The pedicle screw includes screw (1), nail seat (2), jackscrew (3) and connects
Take over the baton (4), on screw (1), nail seat (2) is provided with U-shaped groove to nail seat (2), and jackscrew (3) is placed in U-shaped groove, connect
Rod (4) passes through U-shaped groove, jackscrew (3) to support with pitman (4) from the bottom of jackscrew (3), and the cross section of pitman (4) is in U
Type.
2. pedicle screw according to claim 1, it is characterised in that：The inwall of U-shaped groove is provided with screw thread, jackscrew (3)
It is spirally connected with nail seat (2).
3. pedicle screw according to claim 1, it is characterised in that：The shape of U-shaped pitman (4) and U-shaped groove
It is engaged, pitman (4) and nail seat (2) interference fit.
4. pedicle screw according to claim 1, it is characterised in that：The material of pitman (4) is titanium alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620956778.4U CN206138198U (en) | 2016-08-28 | 2016-08-28 | Vertebral pedicle screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620956778.4U CN206138198U (en) | 2016-08-28 | 2016-08-28 | Vertebral pedicle screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206138198U true CN206138198U (en) | 2017-05-03 |
Family
ID=58627377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620956778.4U Active CN206138198U (en) | 2016-08-28 | 2016-08-28 | Vertebral pedicle screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206138198U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106264699A (en) * | 2016-08-28 | 2017-01-04 | 李海洋 | Pedicle screw |
-
2016
- 2016-08-28 CN CN201620956778.4U patent/CN206138198U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106264699A (en) * | 2016-08-28 | 2017-01-04 | 李海洋 | Pedicle screw |
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| GR01 | Patent grant | ||
| GR01 | Patent grant |