CN203777035U - Pedicle screw - Google Patents
Pedicle screw Download PDFInfo
- Publication number
- CN203777035U CN203777035U CN201420088425.8U CN201420088425U CN203777035U CN 203777035 U CN203777035 U CN 203777035U CN 201420088425 U CN201420088425 U CN 201420088425U CN 203777035 U CN203777035 U CN 203777035U
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- CN
- China
- Prior art keywords
- screw
- annular base
- annular
- shaped cover
- nut
- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a pedicle screw, comprising a U-shaped sleeve, an annular midware and a screw; the screw comprises a screw rod and a screw cap; bosses are respectively arranged in the symmetric direction of the outer surface of the screw cap; the U-shaped sleeve comprises an annular base and two side walls integrally molded on the annular base; positioning bayonets are respectively arranged at opposite insides of the side walls; limiting bosses are respectively arranged at the opposite sides of the inner ring of the annular base; the annular midware comprises an annular base and two integrally molded side walls which are symmetrically arranged on the annular base; snaps are respectively arranged at the outsides of the upper parts of the side walls; the screw rod of the screw penetrates through an opening in the annular base of the U-shaped cover; the bosses on the screw cap are respectively clamped in limiting concave tables of the annular base; the annular midware is arranged in the U-shaped cover at the upper part of the screw cap; the snaps of the annular midware are respectively clamped in the positioning bayonets of the U-shaped cover to limit the screw cap; the screw rotates in the plane vertical to the rising direction of the bosses by taking the screw cap as the rotary center.
Description
Technical field
This utility model is directly involved in medical field, particularly a kind of pedicle screw only planar rotating.
Background technology
At clinical common employing spinal internal fixation system, spinal injury is treated, and in spinal internal fixation system, pedicle screw is set and is fixed on vertebrae, is part indispensable in spinal internal fixation system.
Whether common pedicle screw can rotate according to head of screw at present, is mainly divided into two classes: directed pedicle screw and Universal pedicle screw.Compare with directed pedicle screw, Universal pedicle screw has the advantages such as clinical manipulation is simple, usability is strong, uses more extensive.But due to patient's different syndromes, some patient only needs pedicle screw mainly at a rotation with in surface, does not need large-scale rotation, this demand is that directed pedicle screw and Universal pedicle screw all cannot meet.
In view of this, those skilled in the art, for the problems referred to above, provide a kind of pedicle screw only planar rotating.
Summary of the invention
This utility model provides a kind of pedicle screw, has overcome the difficulty of prior art, can guarantee that screw is mainly at a rotation with in surface, and can not rotate on a large scale, meets pointedly patient's demand.
This utility model adopts following technical scheme:
This utility model provides a kind of pedicle screw, comprises U-shaped cover, annular intermediate member and screw;
Described screw comprises screw rod and nut, is respectively equipped with a boss on the symmetry direction of described nut outer surface;
Described U-shaped cover comprises an annular base and be symmetricly set on the integrated two side on described annular base, and the inner side that described sidewall is relative is respectively equipped with a limited bayonet, and the opposite side of described annular base inner ring is respectively equipped with a spacing concave station;
Described annular intermediate member comprises an annular base and be symmetricly set on the integrated two side on described annular base, and the outside of described side wall upper part is respectively equipped with a buckle;
The screw rod of described screw is through the opening of the annular base of described U-shaped cover, boss on described nut is stuck in the spacing concave station of described annular base, described annular intermediate member is arranged in described U-shaped cover, the top of described nut, the buckle of described annular intermediate member is connected to respectively in the limited bayonet of described U-shaped cover, described nut is limited in the annular base of described U-shaped cover, described screw be take described nut as center of rotation, rotates in the plane perpendicular to described boss protrusion direction.
Preferably, the annular base of described annular intermediate member is provided with and inside contracts shoulder towards the opening inner side of described nut.
Preferably, the top of described nut is provided with the multistage shoulder that stairstepping inside contracts, and when described nut rotates, described multistage shoulder does not contact the shoulder that inside contracts of described annular intermediate member.
Preferably, the angle rotatable of described screw is 30 °.
Preferably, the opposite side of the sidewall of described U-shaped cover is respectively equipped with female thread.
Preferably, also comprise and implant rod and locknut, described implantation rod inserts in U-shaped cover, described locknut meshes the described female thread on described sidewall, after described locknut screws, compress described implantation rod and annular intermediate member, described multistage shoulder with inside contract shoulder secure fit.
Preferably, described spacing concave station is at the spacing described boss of horizontal plane direction.
Preferably, described boss is hemispherical boss.
Pedicle screw of the present utility model can guarantee that screw is mainly at a rotation with in surface, and can not rotate on a large scale, meets pointedly patient's demand.
Below in conjunction with drawings and Examples, further illustrate this utility model.
Accompanying drawing explanation
Fig. 1 is the exploded view of pedicle screw of the present invention;
Fig. 2 is the axonometric chart of the U-shaped cover in the present invention;
Fig. 3 is the axonometric chart of the annular intermediate member in the present invention;
Fig. 4 is the axonometric chart of the screw in the present invention;
Fig. 5 be pedicle screw of the present invention partly cut open exploded view;
Fig. 6 be pedicle screw of the present invention partly cut open constitutional diagram;
Fig. 7 is the screw rotating range schematic diagram of pedicle screw of the present invention; And
Fig. 8 is the using state schematic diagram of pedicle screw of the present invention.
reference numeral
1 U-shaped cover
11 annular bases
12 sidewalls
13 limited bayonets
14 spacing concave stations
15 female threads
2 annular intermediate member
21 annular bases
22 sidewalls
23 buckles
24 inside contract concave station
3 screws
31 screw rods
32 nuts
33 boss
34 multistage shoulders
4 implant rod
5 locknuts
The specific embodiment
Below by Fig. 1 to 8, introduce a kind of specific embodiment of the present utility model
As shown in Fig. 1 to 8, a kind of pedicle screw of the present utility model, comprises U-shaped cover 1, annular intermediate member 2 and screw 3; Described screw 3 comprises screw rod 31 and nut 32, is respectively equipped with a boss 33 on the symmetry direction of described nut 32 outer surfaces; Described U-shaped cover 1 comprises an annular base 11 and is symmetricly set on the integrated two side 12 on described annular base 11, the relative inner side of described sidewall 12 is respectively equipped with a limited bayonet 13, and the opposite side of described annular base 11 inner rings is respectively equipped with a spacing concave station 14; Described annular intermediate member 2 comprises an annular base 21 and is symmetricly set on the integrated two side 22 on described annular base 21, and the outside on described sidewall 22 tops is respectively equipped with a buckle 23; The screw rod 31 of described screw 3 is through the opening 15 of the annular base 11 of described U-shaped cover 1, boss 33 on described nut 32 is stuck in the spacing concave station 14 of described annular base 11, described annular intermediate member 2 is arranged in described U-shaped cover 1, the top of described nut 32, the buckle 23 of described annular intermediate member 2 is connected to respectively in the limited bayonet 13 of described U-shaped cover 1, described nut 32 is limited in the annular base 11 of described U-shaped cover 1, it is center of rotation that described screw 3 be take described nut 32, rotates in the plane perpendicular to described boss 33 protrusion direction.
The annular base 21 of described annular intermediate member 2 is provided with and inside contracts shoulder 24 towards the opening inner side of described nut 32.The top of described nut 32 is provided with the multistage shoulder 34 that stairstepping inside contracts, and when described nut 32 rotates, what described multistage shoulder 34 did not contact described annular intermediate member 2 inside contracts shoulder 24.
Described boss 33 is hemispherical boss, but not as limit, can be also cylindrical etc.
The opposite side of the sidewall 12 of described U-shaped cover 1 is respectively equipped with female thread 15, be used for coordinating implantation rod 4 and locknut 5, described implantation rod 4 inserts in U-shaped cover 1, described female thread 15 on the described sidewall 12 of described locknut 5 engagement, after described locknut 5 screws, compress described implantation rod 4 and annular intermediate member 2, described multistage shoulder 34 with inside contract shoulder 24 secure fit.
Actual service condition of the present utility model is as follows:
Opening 15 by the screw rod of described screw 3 31 through the annular base 11 of described U-shaped cover 1, boss 33 on described nut 32 is stuck in the spacing concave station 14 of described annular base 11, in described annular intermediate member 2, be enclosed within described U-shaped cover 1, the top of described nut 32, the buckle 23 of described annular intermediate member 2 is connected to respectively in the limited bayonet 13 of described U-shaped cover 1, described nut 32 is limited in the annular base 11 of described U-shaped cover 1, it is center of rotation that described screw 3 be take described nut 32, rotates in the plane perpendicular to described boss 33 protrusion direction.After combination, described spacing concave station 14 is at the spacing described boss 33 of horizontal plane direction, fixing in any range that described screw 3 amplitude of oscillation is 30 °.Then by the described female thread 15 on the described sidewall 12 of described locknut 5 engagement, after described locknut 5 screws, compress described implantations rod 4 and annular intermediate member 2, described multistage shoulder 34 and inside contract shoulder 24 secure fit.Wherein, the anglec of rotation of described screw 3 be subject to U-shaped cover 1 annular base 11 stop spacingly, in the present embodiment, the angle rotatable of described screw 3 is 30 °, but not as limit, can more greatly also can be less, determine according to the actual requirements.
Eventually the above, pedicle screw of the present utility model can guarantee that screw is mainly at a rotation with in surface, and can not rotate on a large scale, meets pointedly patient's demand.
Above-described embodiment is only for illustrating technological thought and the feature of this patent, its object is the content that makes those skilled in the art can understand this patent and implements according to this, can not only with the present embodiment, limit the scope of the claims of this patent, be equal variation or the modification that all spirit disclosing according to this patent is done, still drop in the scope of the claims of this patent.
Claims (8)
1. a pedicle screw, is characterized in that: comprise U-shaped cover (1), annular intermediate member (2) and screw (3);
Described screw (3) comprises screw rod (31) and nut (32), on the symmetry direction of described nut (32) outer surface, is respectively equipped with a boss (33);
Described U-shaped cover (1) comprises an annular base (11) and is symmetricly set on the integrated two side (12) on described annular base (11), the relative inner side of described sidewall (12) is respectively equipped with a limited bayonet (13), and the opposite side of described annular base (11) inner ring is respectively equipped with a spacing concave station (14);
Described annular intermediate member (2) comprises an annular base (21) and is symmetricly set on the integrated two side (22) on described annular base (21), and the outside on described sidewall (22) top is respectively equipped with a buckle (23);
The screw rod (31) of described screw (3) is through the opening (15) of the annular base (11) of described U-shaped cover (1), boss (33) on described nut (32) is stuck in the spacing concave station (14) of described annular base (11), described annular intermediate member (2) is arranged in described U-shaped cover (1), the top of described nut (32), the buckle (23) of described annular intermediate member (2) is connected to respectively in the limited bayonet (13) of described U-shaped cover (1), described nut (32) is limited in the annular base (11) of described U-shaped cover (1), it is center of rotation that described screw (3) be take described nut (32), upper rotation in the plane perpendicular to described boss (33) protrusion direction.
2. pedicle screw as claimed in claim 1, is characterized in that: the annular base (21) of described annular intermediate member (2) is provided with and inside contracts shoulder (24) towards the opening inner side of described nut (32).
3. pedicle screw as claimed in claim 2, it is characterized in that: the top of described nut (32) is provided with the multistage shoulder (34) that stairstepping inside contracts, when described nut (32) rotates, what described multistage shoulder (34) did not contact described annular intermediate member (2) when rotary state inside contracts shoulder (24).
4. pedicle screw as claimed in claim 3, is characterized in that: the angle rotatable of described screw (3) is 30 °.
5. pedicle screw as claimed in claim 4, is characterized in that: the opposite side of the sidewall (12) of described U-shaped cover (1) is respectively equipped with female thread (15).
6. pedicle screw as claimed in claim 5, it is characterized in that: also comprise and implant rod (4) and locknut (5), described implantation rod (4) inserts in U-shaped cover (1), described locknut (5) meshes the described female thread (15) on described sidewall (12), after described locknut (5) screws, compress described implantation rod (4) and annular intermediate member (2), described multistage shoulder (34) with inside contract shoulder (24) secure fit.
7. the pedicle screw as described in any one in claim 1 to 6, is characterized in that: described spacing concave station (14) is at the spacing described boss of horizontal plane direction (33).
8. the pedicle screw as described in any one in claim 1 to 6, is characterized in that: described boss (33) is hemispherical boss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420088425.8U CN203777035U (en) | 2014-02-28 | 2014-02-28 | Pedicle screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420088425.8U CN203777035U (en) | 2014-02-28 | 2014-02-28 | Pedicle screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203777035U true CN203777035U (en) | 2014-08-20 |
Family
ID=51313283
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420088425.8U Expired - Fee Related CN203777035U (en) | 2014-02-28 | 2014-02-28 | Pedicle screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203777035U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106806010A (en) * | 2015-12-02 | 2017-06-09 | 东北大学 | Thoracic and lumbar vertebral posterior fine motion fixed system |
-
2014
- 2014-02-28 CN CN201420088425.8U patent/CN203777035U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106806010A (en) * | 2015-12-02 | 2017-06-09 | 东北大学 | Thoracic and lumbar vertebral posterior fine motion fixed 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: 20140820 |