CN204744381U - Locking pedicle of vertebral arch screw that takes off - Google Patents
Locking pedicle of vertebral arch screw that takes off Download PDFInfo
- Publication number
- CN204744381U CN204744381U CN201520446669.3U CN201520446669U CN204744381U CN 204744381 U CN204744381 U CN 204744381U CN 201520446669 U CN201520446669 U CN 201520446669U CN 204744381 U CN204744381 U CN 204744381U
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- nut
- hole
- nail
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- vias
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Abstract
The utility model discloses a locking pedicle of vertebral arch screw that takes off, including the head of a nail, the nail body and core, the head of a nail sets up with the nail body is integrative, be provided with the bellmouth orifice in the head of a nail, follow closely internal being provided with along the axially extended screw hole of the nail body, screw hole and bellmouth orifice intercommunication, the core includes the nut and sets up two shell fragments in the nut bottom, the nut is inside to be provided with the hexagonal hole, is provided with the external screw thread that matches with the screw hole on the nut is global, be provided with on the nail body and be used for the shell fragment to stretch out external first through -hole group of nail and second through -hole group, arrange side by side about first through -hole group and the second through -hole group that first through -hole group includes two symmetrical arrangement's first through -hole, second through -hole group is including two symmetrical arrangement's second through -hole. The locking pedicle of vertebral arch screw that takes off of this structure in the use, can avoid not hard up, has guaranteed fixed effect.
Description
Technical field
This utility model relates to medical instruments field, is specifically related to a kind of anti-loose pedicle screw.
Background technology
Along with Chinese population senescence, the gerontal patient of current spinal fracture and spondylolishesis is more old more, and many gerontal patients need operative treatment.Because of osteoporosis, traditional pedicle screw is fixing insecure after settling, and easily occurs that screw is extracted loosening, causes fixation failure, operative failure in reseting procedure.In addition, use the fixing some patients of conventional pedicle screws to need row overhaul technology because of the state of an illness, then will take out former screw and again settle pedicle screw, because of the destruction in Yuan Ding road, inadequate to pedicle screw hold, equally easily cause fixation failure.
Utility model content
In view of this, the purpose of this utility model is to provide a kind of anti-loose pedicle screw, in use, can avoid loosening, and ensures fixed effect.
This utility model is solved the problem by following technological means: a kind of anti-loose pedicle screw, comprise the head of a nail, rivet nut and core body, the described head of a nail and rivet nut are wholely set, bellmouth orifice is provided with in the described head of a nail, be provided with along the axially extended screwed hole of rivet nut in described rivet nut, described screwed hole is communicated with bellmouth orifice, described core body comprises nut and is arranged on the two panels shell fragment bottom nut, described nut inside is provided with hexagon ring, nut side face is provided with the external screw thread mated with screwed hole, described rivet nut is provided with and stretches out the first sets of vias outside rivet nut and the second sets of vias for shell fragment, described first sets of vias and the second sets of vias are arranged in juxtaposition up and down, first sets of vias comprises two the first through holes be arranged symmetrically with, second sets of vias comprises two the second through holes be arranged symmetrically with.
Further, described first through hole and the second through hole all become horn-like.
Further, described first through hole is arranged near the head of a nail.
Further, described shell fragment is provided with bending away from nut one end.
The beneficial effects of the utility model: anti-loose pedicle screw of the present utility model, comprise the head of a nail, rivet nut and core body, the described head of a nail and rivet nut are wholely set, bellmouth orifice is provided with in the described head of a nail, be provided with along the axially extended screwed hole of rivet nut in described rivet nut, described screwed hole is communicated with bellmouth orifice, described core body comprises nut and is arranged on the two panels shell fragment bottom nut, described nut inside is provided with hexagon ring, nut side face is provided with the external screw thread mated with screwed hole, described rivet nut is provided with and stretches out the first sets of vias outside rivet nut and the second sets of vias for shell fragment, described first sets of vias and the second sets of vias are arranged in juxtaposition up and down, first sets of vias comprises two the first through holes be arranged symmetrically with, second sets of vias comprises two the second through holes be arranged symmetrically with.The anti-loose pedicle screw of this structure, in use, can avoid loosening, ensure that fixed effect.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, this utility model is further described.
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
Below with reference to accompanying drawing, this utility model is described in detail, as shown in Figure 1: a kind of anti-loose pedicle screw, comprise the head of a nail 1, rivet nut 2 and core body, the described head of a nail and rivet nut are wholely set, bellmouth orifice 4 is provided with in the described head of a nail, be provided with along the axially extended screwed hole 5 of rivet nut in described rivet nut, described screwed hole is communicated with bellmouth orifice, the two panels shell fragment 32 that described core body comprises nut 31 and is arranged on bottom nut, described nut inside is provided with hexagon ring 6, nut side face is provided with the external screw thread mated with screwed hole, described rivet nut is provided with and stretches out the first sets of vias outside rivet nut and the second sets of vias for shell fragment, described first sets of vias and the second sets of vias are arranged in juxtaposition up and down, first sets of vias comprises two the first through holes 7 be arranged symmetrically with, second sets of vias comprises two the second through holes 8 be arranged symmetrically with.When using this screw, first rivet nut is inserted vertebral body by pedicle of vertebral arch, insert first core body subsequently, concrete, core body is placed to screwed hole entrance by bellmouth orifice, the inner hexagon spanner mated with hexagon ring is utilized to drive cap rotation, make core body threadingly hole precession, two panels shell fragment can not open under the restriction of screwed hole, when by the first sets of vias, by surgical device, shell fragment is avoided to slip in the first through hole, continue precession forward, when two panels shell fragment arrives the second through hole away from nut one end, under elastic force effect, two panels shell fragment slips into the second corresponding through hole respectively, continue precession nut, two panels shell fragment opens, stretched out by the second through hole of correspondence respectively, snap in vertebral cancellous bone, form the first agnail, insert second core body in the same way, the two panels shell fragment of second core body is stretched out by the first through hole of correspondence respectively, snap in spongy bone that pedicle of vertebral arch and vertebral body have a common boundary, form the second agnail, by the firm effect of the first agnail and the second agnail, can avoid loosening, ensure that the fixed effect of this pedicle screw.
Can form bending 9 at above-mentioned shell fragment away from nut one end, can improve the firm effect of the agnail of formation so further, in addition, the span of the second agnail of formation can not be excessive, avoids injured nerve; In addition, by the stretching degree regulating the degree of depth screwing in nut to regulate shell fragment, such as when regulating the stretching degree of the shell fragment stretched out by the second through hole, the nut be connected with this shell fragment screws in darker, and the stretching degree of shell fragment is wider.
As the further improvement of technique scheme, described first through hole and the second through hole all become horn-like.Be convenient to shell fragment slip in the first through hole or the second through hole.
As the further improvement of technique scheme, described first through hole is arranged near the head of a nail.Be convenient to the intersection that the second agnail snaps in pedicle of vertebral arch and vertebral body like this, further ensure firm effect.
What finally illustrate is, above embodiment is only in order to illustrate the technical solution of the utility model and unrestricted, although be described in detail this utility model with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify to the technical solution of the utility model or equivalent replacement, and not departing from aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of right of the present utility model.
Claims (4)
1. an anti-loose pedicle screw, it is characterized in that: comprise the head of a nail (1), rivet nut (2) and core body, the described head of a nail and rivet nut are wholely set, bellmouth orifice (4) is provided with in the described head of a nail, be provided with along the axially extended screwed hole of rivet nut (5) in described rivet nut, described screwed hole is communicated with bellmouth orifice, described core body comprises nut (31) and is arranged on the two panels shell fragment (32) bottom nut, described nut inside is provided with hexagon ring (6), nut side face is provided with the external screw thread mated with screwed hole, described rivet nut is provided with and stretches out the first sets of vias outside rivet nut and the second sets of vias for shell fragment, described first sets of vias and the second sets of vias are arranged in juxtaposition up and down, first sets of vias comprises two the first through holes (7) be arranged symmetrically with, second sets of vias comprises two the second through holes (8) be arranged symmetrically with.
2. anti-loose pedicle screw according to claim 1, is characterized in that: described first through hole and the second through hole all become horn-like.
3. the anti-loose pedicle screw according to claim 1-2 any one, is characterized in that: described first through hole is arranged near the head of a nail.
4. anti-loose pedicle screw according to claim 3, is characterized in that: described shell fragment is provided with bending (9) away from nut one end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520446669.3U CN204744381U (en) | 2015-06-26 | 2015-06-26 | Locking pedicle of vertebral arch screw that takes off |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520446669.3U CN204744381U (en) | 2015-06-26 | 2015-06-26 | Locking pedicle of vertebral arch screw that takes off |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204744381U true CN204744381U (en) | 2015-11-11 |
Family
ID=54459146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520446669.3U Expired - Fee Related CN204744381U (en) | 2015-06-26 | 2015-06-26 | Locking pedicle of vertebral arch screw that takes off |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204744381U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106691570A (en) * | 2017-01-22 | 2017-05-24 | 北京爱康宜诚医疗器材有限公司 | Bolt |
| CN108498155A (en) * | 2018-04-26 | 2018-09-07 | 重庆医科大学附属永川医院 | A kind of anti-rotation pedicle screw of self-locking and its application method |
| CN111728683A (en) * | 2020-07-15 | 2020-10-02 | 四川大学华西医院 | Centrum embedded fixing device |
-
2015
- 2015-06-26 CN CN201520446669.3U patent/CN204744381U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106691570A (en) * | 2017-01-22 | 2017-05-24 | 北京爱康宜诚医疗器材有限公司 | Bolt |
| CN106691570B (en) * | 2017-01-22 | 2020-11-06 | 北京爱康宜诚医疗器材有限公司 | Screw nail |
| CN108498155A (en) * | 2018-04-26 | 2018-09-07 | 重庆医科大学附属永川医院 | A kind of anti-rotation pedicle screw of self-locking and its application method |
| CN108498155B (en) * | 2018-04-26 | 2023-06-20 | 重庆医科大学附属永川医院 | Self-locking anti-rotation pedicle screw and use method thereof |
| CN111728683A (en) * | 2020-07-15 | 2020-10-02 | 四川大学华西医院 | Centrum embedded fixing device |
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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: 20151111 Termination date: 20160626 |