CN203369955U - Single-axis pedicle screw - Google Patents
Single-axis pedicle screw Download PDFInfo
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- CN203369955U CN203369955U CN201320426195.7U CN201320426195U CN203369955U CN 203369955 U CN203369955 U CN 203369955U CN 201320426195 U CN201320426195 U CN 201320426195U CN 203369955 U CN203369955 U CN 203369955U
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Abstract
The utility model provides a single-axis pedicle screw which comprises a screw body, a screw seat and a limiting piece. The screw body comprises a screw head and a screw rod, the upper half part of the screw head is a cylindrical face, the lower half part of the screw head is a spherical face, the axis of the cylindrical face is perpendicular to that of the screw rod, the two ends of the screw head are planes, the screw body penetrates through the screw seat, the limiting piece is connected to the screw seat, and the two ends of the screw head are located in the limiting piece. The single-axis pedicle screw has the rotation freedom degree in one direction, reset operation can be carried out in a spine surgery, reset loss is avoided, and work staff can conveniently mount and connect the screw.
Description
Technical field
This utility model relates to technical field of medical instruments, relates in particular to a kind of pedicle screw of the single shaft for spinal operation.
Background technology
The application of internal fixation of spine technology has had the history of decades.Along with the development of spinal biomechanics research and material science, the internal fixation of spine technology has obtained huge advance made, to such an extent as to be widely applied in the operative treatments such as spinal column degenerative disease, tumor of spine, wound Spondylitis.Generally, the internal fixation of spine operation comprises following step: 1, preoperative preparation; 2, He Ding road, pedicle of vertebral arch location is prepared; 3, implant pedicle screw; 4, bending pitman, load pitman; 5, precompressed pitman, interim locking; 6, orthopedic resetting; 7, final locking, be close to and take over the baton with spiral plug lock.
In above step, pedicle screw used is mainly fixed angle pedicle screw or multiaxis pedicle screw, orthopedic the resetting of step 6 is the most difficult and the most complicated operation, in this this process, when using pedicle screw fixation device, existing fixed angle pedicle screw can not swing, and implants and the reset operation difficulty; When by the multiaxis pedicle screw fixation device, because multiaxis pedicle screw angle is flexible, can not fixed-direction and angle, can't carry out reset operation, easily cause the loss that resets.Therefore in this process, need the doctor will possess superb technology and level, and this process does not have relevant technology and scheme to instruct how concrete operations of doctor when practical operation yet, this has not only increased the limitation of doctor when operation greatly, has also seriously hindered carrying out of spinal operation.Therefore need a kind of in spinal operation the single shaft pedicle screw of easy orthopedic reset operation.
The utility model content
But the technical problems to be solved in the utility model is to provide a kind of facilitates orthopedic reset operation, the single shaft pedicle screw of the partial rotational of losing of avoiding in operation process resetting, to overcome the above-mentioned defect of prior art.
In order to solve the problems of the technologies described above, this utility model adopts following technical scheme: a kind of single shaft pedicle screw, comprise screw, screw base and locating part, described screw comprises head of screw and shank of screw, the described first half at head of screw is cylindroid, the Lower Half of head of screw is provided with spherical or cylindroid, the axis of described cylindroid and the axis of shank of screw are perpendicular, the both ends of the surface of head of screw are plane, described screw is located on screw base, described locating part is connected on screw base, within the both ends of the surface of head of screw are positioned at locating part.
Preferably, the Lower Half of described head of screw is spherical.
Further, the upper end of described screw base has screwed hole and U-lag, the lower end of screw base has the through hole passed for shank of screw and the ball-and-socket matched with described spherical, described screwed hole and described through hole are connected, described locating part comprises a top board and two claws from top board to downward-extension, described top board is pressed in the top of head of screw, and two claws are stuck on the both ends of the surface of head of screw, and the inwall of screw base is provided with and described two stopper slots that claw matches.
Further, also have inner hexagonal hole on described head of screw, the bottom of described top board be provided with head of screw on the cylindrical groove that matches of cylindroid, top board is provided with the through hole relative with inner hexagonal hole.
Further, on the inwall of the screw base of described screwed hole below, also be provided with annular flange flange, described top board is stuck in the annular flange flange below.
As mentioned above, single shaft pedicle screw of the present utility model, have following beneficial effect: head of screw of the present utility model has the rotational freedom in an axial plane, can reset operation when carrying out operation on vertebra, the loss of avoiding resetting, and the installation that this utility model is convenient to the staff connects.
The accompanying drawing explanation
The structure chart that Fig. 1 and Fig. 2 are screw base of the present utility model and cutaway view.
Fig. 3 is bolt structure figure of the present utility model.
Fig. 4 is locating part structure chart of the present utility model.
Fig. 5 is motion principle figure of the present utility model.
In figure: 1 screw base 11 U-lags
12 screwed hole 13 stopper slots
14 ball-and-socket 15 through holes
16 annular flange flange 2 screws
21 head of screw 22 shanks of screw
23 spherical 24 planar end surfaces
25 planar end surface 26 inner hexagonal holes
27 cylindroid 3 locating parts
31 base plate 32 claws
33 cylindrical groove 34 through holes
The specific embodiment
The structure that Figure of description illustrates, ratio, size etc., equal contents in order to coordinate description to disclose only, understand and read for person skilled in the art scholar, not in order to limit the enforceable qualifications of this utility model, therefore the technical essential meaning of tool not, the adjustment of the modification of any structure, the change of proportionate relationship or size, do not affecting under the effect that this utility model can produce and the purpose that can reach, all should still drop in the scope that technology contents that this utility model discloses can contain.Simultaneously, in this description, quote as " on ", the term such as D score, 'fornt', 'back', " centre ", also only for ease of understanding of narrating, but not in order to limit the enforceable scope of this utility model, the change of its relativeness or adjustment, under without essence change technology contents, when also being considered as the enforceable category of this utility model.
As Fig. 1 to as shown in Fig. 5, this utility model comprises screw 2, screw base 1 and locating part 3, described screw 2 comprises head of screw 21 and shank of screw 22, as shown in Figure 3, the first half of head of screw 21 is provided with cylindroid 27, the Lower Half of head of screw 21 is provided with spherical 23 or cylindroid 27, wherein the axis of the axis of cylindroid 27 and shank of screw 22 is perpendicular, the both ends of the surface 24 of head of screw 21, 25 is plane, described screw 2 penetrates screw base 1 from screw base 1 upper end, and then described locating part 3 is connected on screw base 1, and the both ends of the surface 24 of head of screw 21, 25 be positioned at locating part 3 within.
In the present embodiment, preferred, as shown in Figure 3, the Lower Half of head of screw 21 is spherical 23.Screw base 1 as depicted in figs. 1 and 2, its upper end has screwed hole 12 and U-lag 11, the lower end of screw base 1 has the through hole 15 passed for shank of screw 22 and the ball-and-socket 14 matched with spherical 23, described screwed hole 12 and described through hole 15 are connected, and also are provided with stopper slot 13 on the inwall of screw base 1.As shown in Figure 4, locating part 3 comprises a top board 31 and two claws 32 from top board 31 to downward-extension, and described claw 32 matches with stopper slot 13.When combination, first screw 2 is penetrated to screw base 1 from U-lag 11 these ends, described spherical 23 and ball-and-socket 14 match, again locating part 3 is embedded to screw base 1 from U-lag 11 tops, make top board 31 be positioned at the top of head of screw 21, two claws 32 are stuck on the both ends of the surface 24,25 of head of screw 21, and two claws 32 match with stopper slot 13 again simultaneously, thereby have realized that the position of 3 pairs of both ends of the surface of locating part 24,25 limits.In anabolic process, in order to guarantee the position stability of locating part 3, also be provided with annular flange flange 16 on screw base 1 inwall of described screwed hole 12 belows, when locating part 3 is embedded into screw base 1, top board 31 is stuck in annular flange flange 16 belows, after combination, locating part 3, in shift position that axially just can not be careless, has been guaranteed the excellent operability of this device when practical application like this.Preferably, the top of head of screw 21 also has inner hexagonal hole 26, the bottom of described top board 31 be provided with head of screw 21 on the cylindrical groove 33 that matches of cylindroid 27, top board 31 is provided with the through hole 34 relative with inner hexagonal hole 26, the effect of this through hole 34 is when operation, is convenient to instrument hexagonal head screw cutter and coordinates with inner hexagonal hole 36 this device is screwed in vertebra through through hole 34; After coordinating, described cylindroid 27 and cylindrical groove 33 make the cooperation between screw 2 and locating part 3 more stable.As shown in Figure 5, formed complete single shaft pedicle screw after screw base 1, screw 2 and locating part 3 are combined after, because two end faces 24,25 on head of screw 21 have been defined, and the Lower Half of head of screw 21 is sphericals 23, therefore screw 2 can only be take head of screw 21 and be rotated as fulcrum in monoplane.
When practical operation, first this device was screwed in vertebra by hexagonal head screw cutter and coordinating of inner hexagonal hole 26, adjust position, pitman is placed in U-lag 11, plug screw being screwed in to bolt block 1 matches and merges the compression pitman with screwed hole 12 again, as need reset or adjust, rotating screw seat 1 gets final product.
In sum, single shaft pedicle screw of the present utility model, the problem that can not be resetted in the time of can solving operation on vertebra.So, thereby this utility model has effectively overcome practical problems more of the prior art, very high use value is arranged aspect operation on vertebra.
Above-mentioned embodiment is illustrative principle of the present utility model and effect thereof only, but not for limiting this utility model.This utility model also many aspects can also be improved under the prerequisite without prejudice to overall thought, for person skilled in the art scholar, all can, under spirit of the present utility model and category, can be modified or change above-described embodiment.Therefore, have in technical field under such as and usually know that the knowledgeable modifies or changes not breaking away from all equivalences that complete under spirit that this utility model discloses and technological thought, must be contained by claim of the present utility model.
Claims (5)
1. a single shaft pedicle screw, comprise screw (2), screw base (1) and locating part (3), described screw comprises head of screw (21) and shank of screw (22), it is characterized in that: the first half of described head of screw (21) is cylindroid (27), the Lower Half of head of screw (21) is provided with spherical (23) or cylindroid (27), the axis of the axis of described cylindroid (27) and shank of screw (22) is perpendicular, the both ends of the surface (24 of head of screw (21), 25) be plane, described screw (2) is located on screw base (1), described locating part (3) is connected on screw base (1), the both ends of the surface (24 of head of screw (21), 25) within being positioned at locating part (3).
2. single shaft pedicle screw according to claim 1, it is characterized in that: the Lower Half of described head of screw (21) is spherical (23).
3. single shaft pedicle screw according to claim 2, it is characterized in that: the upper end of described screw base (1) has screwed hole (12) and U-lag (11), the lower end of screw base (1) has the through hole (15) passed for shank of screw (22) and the ball-and-socket (14) matched with described spherical (23), described screwed hole (12) and described through hole (15) are connected, described locating part (3) comprises a top board (31) and two claws (32) from top board (31) to downward-extension, described top board (31) is pressed in the top of head of screw (21), two claws (32) are stuck in the both ends of the surface (24 of head of screw (21), 25) on, the inwall of screw base (1) is provided with the stopper slot (13) matched with described two claws (32).
4. single shaft pedicle screw according to claim 3, it is characterized in that: also have inner hexagonal hole (26) on described head of screw (21), the bottom of described top board (31) be provided with and head of screw (21) on the cylindrical groove (33) that matches of cylindroid (27), top board (31) is provided with the through hole (34) relative with inner hexagonal hole (26).
5. single shaft pedicle screw according to claim 3 is characterized in that: also be provided with annular flange flange (16) on the inwall of the screw base (1) of described screwed hole (12) below, described top board (31) is stuck in annular flange flange (16) below.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320426195.7U CN203369955U (en) | 2013-07-17 | 2013-07-17 | Single-axis pedicle screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320426195.7U CN203369955U (en) | 2013-07-17 | 2013-07-17 | Single-axis pedicle screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203369955U true CN203369955U (en) | 2014-01-01 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320426195.7U Expired - Lifetime CN203369955U (en) | 2013-07-17 | 2013-07-17 | Single-axis pedicle screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203369955U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104825221A (en) * | 2015-05-14 | 2015-08-12 | 林健泽 | Improved pedicle screw |
| CN104825222A (en) * | 2015-05-14 | 2015-08-12 | 林健泽 | X-axis one-way pedicle screw |
| CN104825218A (en) * | 2015-05-14 | 2015-08-12 | 林健泽 | Y-axis one-way pedicle screw |
| CN105496539A (en) * | 2016-01-20 | 2016-04-20 | 北京大学深圳医院 | Pedicle screw loading radioactive particles |
-
2013
- 2013-07-17 CN CN201320426195.7U patent/CN203369955U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104825221A (en) * | 2015-05-14 | 2015-08-12 | 林健泽 | Improved pedicle screw |
| CN104825222A (en) * | 2015-05-14 | 2015-08-12 | 林健泽 | X-axis one-way pedicle screw |
| CN104825218A (en) * | 2015-05-14 | 2015-08-12 | 林健泽 | Y-axis one-way pedicle screw |
| CN105496539A (en) * | 2016-01-20 | 2016-04-20 | 北京大学深圳医院 | Pedicle screw loading radioactive particles |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI SANYOU MEDICAL EQUIPMENT CO., LTD. Free format text: FORMER OWNER: SHANGHAI TATENG MEDICAL DEVICE CO.,LTD. Effective date: 20140704 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 201201 PUDONG NEW AREA, SHANGHAI TO: 201807 JIADING, SHANGHAI |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140704 Address after: 201807 Jiading District Jia Tang Road, Shanghai, No. 1988 Patentee after: SHANGHAI SANYOU MEDICAL Co.,Ltd. Address before: 201201, Pudong New Area, Shanghai Qing Road 356, 3, 2 floor Patentee before: Shanghai Tateng Medical Device Co.,Ltd. |
|
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201807 Jiading District Jia Tang Road, Shanghai, No. 1988 Patentee after: SHANGHAI SANYOU MEDICAL Co.,Ltd. Address before: 201807 Jiading District Jia Tang Road, Shanghai, No. 1988 Patentee before: SHANGHAI SANYOU MEDICAL Co.,Ltd. |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20170711 Address after: 201807 Jiading District Jia Tang Road, Shanghai, No. 1988 Co-patentee after: THE FOURTH MILITARY MEDICAL University Patentee after: SHANGHAI SANYOU MEDICAL Co.,Ltd. Address before: 201807 Jiading District Jia Tang Road, Shanghai, No. 1988 Patentee before: SHANGHAI SANYOU MEDICAL Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140101 |
|
| CX01 | Expiry of patent term |