CN207613849U - A kind of pedicle nail - Google Patents
A kind of pedicle nail Download PDFInfo
- Publication number
- CN207613849U CN207613849U CN201720139019.3U CN201720139019U CN207613849U CN 207613849 U CN207613849 U CN 207613849U CN 201720139019 U CN201720139019 U CN 201720139019U CN 207613849 U CN207613849 U CN 207613849U
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- CN
- China
- Prior art keywords
- ailhead
- cushion
- nail
- nail rod
- shape
- 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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Abstract
The utility model belongs to the field of medical instrument technology, a kind of pedicle nail, including ailhead, nail rod and the screw thread being arranged in nail rod, the screw thread is double thread, and one of thread depth is relatively low, described nail rod one end is tip, the other end is fixedly connected with the ailhead, the nail rod is arranged with cushion close to one end of the ailhead, the cushion bottom is provided with resilient bushing, the resilient bushing is tightly set in the nail rod on the screw thread of ailhead one end, and the resilient bushing shape is consistent with the thread shape in the nail rod；The cushion matches close to one end shape of ailhead with the ailhead lower shape, and the lower part cladding of the ailhead in the inner, there is flange, the cushion to be resisted against on the flange close to one end of the ailhead by the cushion in the ailhead circumferential direction.It sets screw thread to double thread, substantially increases screw-in speed when screwing in so that operating time is shortened, and working doctor intensity is reduced.
Description
Technical field
The utility model belongs to the field of medical instrument technology more particularly to a kind of pedicle nail.
Background technology
Pedicle of vertebral arch is a part for cone bow, arises from centrum upper back, short and thick, vertical with centrum direction rearward raised,
Its shape is arc-shaped, is merged with centrum, articular process and vertebral plate, and pedicle of vertebral arch is the component part for forming intervertebral foramen.Vertebral arch
Root is also to connect bony structure most strong between centrum and push plate, carries out screw to fix being that reconstruction backbone is steady by pedicle of vertebral arch
Reliable mechanical foundation is provided surely.
Pedicle screws fixation has become the important means of the illness such as treatment spinal trauma, bone lesion or malformation correction.And
Pedicle nail is screwed into that pedicle of vertebral arch speed is slower in the course of surgery at present, increases operating time and the working strength of doctor,
Pedicle nail connect that insecure, withdrawal resistance is poor with pedicle of vertebral arch simultaneously, and backbone is repeatedly under the shear action of flexion-extension motion, most
Fatigability fracture easily occurs.
Utility model content
It is screwed into slow defect to solve pedicle nail of the existing technology, the utility model provides a kind of vertebral arch
Root is followed closely.
In order to solve the above technical problems, technical solution used by the utility model is：A kind of pedicle nail, including nail
Head, nail rod and the screw thread being arranged in the nail rod, the screw thread is double thread, and one of thread depth is relatively low,
Described nail rod one end is tip, and the other end is fixedly connected with the ailhead, and the nail rod is arranged with close to one end of the ailhead
Cushion, the cushion bottom are provided with resilient bushing, and the resilient bushing is tightly set in the nail rod close to ailhead one
On the screw thread at end, and the resilient bushing shape is consistent with the thread shape in the nail rod；The cushion is close to ailhead
One end shape matches with the ailhead lower shape, and the cushion coats the lower part of the ailhead in the inner, the nail
In head circumferential direction there is flange, the cushion to be resisted against on the flange close to one end of the ailhead.
Preferably, the cushion is integrated with the resilient bushing.The two integrated setting, Neng Goubian
It, can be using cushion as the impetus of handheld terminal when the installation of resilient bushing, installation, you can resilient bushing is set in top
Outside the screw thread of bar, while resilient bushing can increase the intensity of mandril tail portion and the screw thread on screw rod and pedicle of vertebral arch binding face
Product and tightening degree improve connection fastness and tension pull out force.
Preferably, the cushion and the resilient bushing are silica gel material.
Preferably, the tip side of the nail rod has notch.The notch forms self tapping cutting edge, is conducive to pedicle of vertebral arch
The screw-in of nail.
Preferably, the ailhead is in bulb shape, top has hexagonal counterbore.The ailhead of the shape of bulb makes vertebra
The screw-in angle of nut nail has controllability.
Further, the part that the ailhead is located at the inside of the cushion has annular groove, in the cushion
Circle is provided with the annular protrusion to match with the annular groove.Annular groove can further increase the connection fastness of cushion and ailhead,
It avoids pedicle nail from tightening rear cushion stress to slip.
Advantageous effect：It sets screw thread to double thread in the application, screw-in speed is substantially increased when screwing in so that
Operating time is shortened, and working doctor intensity is reduced, and two thread depth differences, improves screw thread and pedicle of vertebral arch
Contact area, contacted with the sclerotin of different location, connection it is stronger.In addition, the setting of cushion can tighten pedicle of vertebral arch
Rear support is followed closely between ailhead and pedicle of vertebral arch, pretightning force is provided, avoids pedicle nail from loosening, loosen, while resilient bushing can
Increase the intensity of mandril tail portion and the screw thread on screw rod and pedicle of vertebral arch fitting area and tightening degree, improves connection fastness
With tension pull out force.
Description of the drawings
Fig. 1 is the utility model pedicle nail structural schematic diagram；
The positions Fig. 2 pedicle nail lateral partial structurtes sectional view；
1. nail rod in figure, 11. notches, 2. ailheads, 21. flanges, 22. hexagonal counterbores, 23, annular groove, 3. cushions, 4. elasticity
Bushing.
Specific implementation mode
Embodiment
As illustrated in fig. 1 and 2, a kind of pedicle nail, including ailhead 2, nail rod 1 and the screw thread being arranged in the nail rod 1, institute
The screw thread stated is double thread, and one of thread depth is relatively low, and 1 one end of the nail rod is tip, the point of the nail rod
There is notch 11, the other end to be fixedly connected with the ailhead 2 for portion side, and the ailhead 2 is in bulb shape, and top has hexagonal
Counterbore 22, the nail rod 1 are arranged with cushion 3 close to one end of the ailhead 2, and flexible lining is arranged in 3 bottom of the cushion
Set 4, the resilient bushing 4 is tightly set in the nail rod 1 on the screw thread of 2 one end of ailhead, and 4 shape of the resilient bushing
Consistent with the thread shape in the nail rod 1, the cushion 3 is integrated with the resilient bushing 4, the bullet
Property pad 3 and the resilient bushing 4 are silica gel material；The cushion 3 is under one end shape of ailhead 2 and the ailhead 2
Portion's shape matches, and the lower part cladding of the ailhead 2 in the inner, is had flange by the cushion 3 in 2 circumferential direction of the ailhead
21, the cushion 3 is resisted against close to one end of the ailhead 2 on the flange 21, and the ailhead 2 is located at the cushion
There is annular groove 23,3 inner ring of cushion to be provided with the annular protrusion to match with the annular groove 23 for the part of 3 inside.
When above-mentioned pedicle nail is screwed into pedicle of vertebral arch, it is fast to screw in speed, the time is saved, when being threaded into resilient bushing 4
When position, resilient bushing 4 is threaded into pedicle of vertebral arch therewith, since there is resilient bushing 4 elasticity screw thread and nail rod 1 and vertebra can be improved
Tightness degree between nut is tightened rear cushion 3 and is pressed between ailhead 2 and pedicle of vertebral arch so that screw thread and resilient bushing 4
Connection between pedicle of vertebral arch is even closer, and cushion 3 and resilient bushing 4 have certain cushion performance, and it is anti-to mitigate vertebra
Impact when multiple flexion-extension motion to pedicle nail so that pedicle nail tail portion is not easy to break, improves the service life of pedicle nail,
And due to flange 21 and annular groove 23 there are cushions 3 to be slipped by ailhead 2.
Claims (6)
1. a kind of pedicle nail, it is characterised in that：Include the screw thread of ailhead (2), nail rod (1) and setting in the nail rod (1),
The screw thread is double thread, and one of thread depth is relatively low, and described nail rod (1) one end is tip, the other end and institute
It states ailhead (2) to be fixedly connected, the nail rod (1) is arranged with cushion (3), the cushion close to one end of the ailhead (2)
(3) bottom is provided with resilient bushing (4), and the resilient bushing (4) is tightly set in the nail rod (1) close to ailhead (2) one end
Screw thread on, and the resilient bushing (4) shape is consistent with the thread shape in the nail rod (1)；The cushion (3) is close
One end shape of ailhead (2) matches with the ailhead (2) lower shape, and the cushion (3) is by the lower part of the ailhead (2)
Cladding in the inner, there is flange (21), the cushion (3) to be supported close to one end of the ailhead (2) in ailhead (2) circumferential direction
It leans against on the flange (21).
2. pedicle nail according to claim 1, it is characterised in that：The cushion (3) and the resilient bushing (4)
It is integrated.
3. pedicle nail according to claim 1 or 2, it is characterised in that：The cushion (3) and the resilient bushing
(4) it is silica gel material.
4. pedicle nail according to claim 1, it is characterised in that：The tip side of the nail rod (1) has notch
(11)。
5. pedicle nail according to claim 1, it is characterised in that：The ailhead (2) is in bulb shape, and top has
Hexagonal counterbore (22).
6. pedicle nail according to claim 1, it is characterised in that：The ailhead (2) is located at the cushion (3)
There is annular groove (23), the cushion (3) inner ring to be provided with the convex annular to match with the annular groove (23) for internal part
It rises.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720139019.3U CN207613849U (en) | 2017-02-16 | 2017-02-16 | A kind of pedicle nail |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720139019.3U CN207613849U (en) | 2017-02-16 | 2017-02-16 | A kind of pedicle nail |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207613849U true CN207613849U (en) | 2018-07-17 |
Family
ID=62817308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720139019.3U Active CN207613849U (en) | 2017-02-16 | 2017-02-16 | A kind of pedicle nail |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207613849U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109589163A (en) * | 2019-01-25 | 2019-04-09 | 江苏嘉斯康医疗科技有限公司 | A kind of double thread centrum nail |
-
2017
- 2017-02-16 CN CN201720139019.3U patent/CN207613849U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109589163A (en) * | 2019-01-25 | 2019-04-09 | 江苏嘉斯康医疗科技有限公司 | A kind of double thread centrum nail |
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| GR01 | Patent grant |