CN202020525U - Spine fixing device and pedicle screw thereof - Google Patents
Spine fixing device and pedicle screw thereof Download PDFInfo
- Publication number
- CN202020525U CN202020525U CN2011200851513U CN201120085151U CN202020525U CN 202020525 U CN202020525 U CN 202020525U CN 2011200851513 U CN2011200851513 U CN 2011200851513U CN 201120085151 U CN201120085151 U CN 201120085151U CN 202020525 U CN202020525 U CN 202020525U
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- screw thread
- nail
- threaded rod
- screw
- back segment
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Abstract
The utility model discloses a pedicle screw for a spine fixing device, comprising a threaded rod (1) and a screw base (2), wherein the threaded rod (1) comprises a rear segment part (11) close to the screw base (2) and a front segment part (12) far away from the screw base (2), and the rear segment part (11) and the front segment part (12) of the threaded rod (1) are respectively provided with a first screw thread (101); the outer of the rear segment part (11) is also provided with a second screw thread (111). The first screw thread (101) and the second screw thread (111) are arranged at the rear segment part (11) of the threaded rod (1), close to the screw base (2), i.e., the number of starts of screw threads of the pedicle screw screwed in cortical bone is relatively increased, thus, the holding force of the pedicle screw is effectively enhanced to ensure that the pedicle screw is well matched with the spine of a human body, and the pedicle screw is prevented from loosening from the spine of the human body. The utility model also discloses the spine fixing device comprising the pedicle screw, which has the same technical effect as the pedicle screw.
Description
Technical field
This utility model relates to technical field of medical instruments, particularly relates to a kind of awl nut nail that is used for spinal fixing device.This utility model also relates to a kind of spinal fixing device that comprises above-mentioned awl nut nail.
Background technology
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 spinal fixing device has obtained extensive use in operative treatments such as spinal column degenerative disease, tumor of spine, the infection of wound spinal column.
Spinal fixing device generally includes pitman and a plurality of awl nut nail.When fixing vertebra, earlier pitman is curved in advance the curved shape on the coronalplane, will bore the spinal column of nut nail implant into body then, re-use pitman and connect a plurality of awl nuts and follow closely, by technology such as transfer rod, pressure bars the human spine is proofreaied and correct subsequently and reset.In this work process, awl nut nail is the unique parts that directly contact with the human spine, thereby awl nut nail is an important components in the spinal fixing device.
Please refer to Fig. 1, Fig. 1 is the structural representation of awl nut nail in the prior art.
Awl nut nail mainly comprise threaded rod 1 ' and nail seat 2 ', threaded rod 1 ' be divided into again near nail seat 2 ' back segment portion 11 ' and away from described nail seat 2 ' leading portion portion 12 '.After will boring nut nail implant into body spinal column, threaded rod 1 ' back segment portion 11 ' match the leading portion portion 12 of threaded rod ' match with the cortical bone of human body with the spongy bone of human body.
In the above-mentioned prior art, the awl nut nail single line regular screw threads structures that adopt more.Briefly introduce the defective of this awl nut nail below.
As shown in Figure 1, threaded rod 1 ' the outside of this awl nut nail only be provided with first screw thread 101 ', first screw thread 101 ' be single thread, behind the implant into body spinal column, because it is less to screw in human spine's screw thread figure number, it is less to human spine's hold to cause boring the nut nail, causes that easily awl nut nail is loosening in the human spine, when serious even can loose from the human spine, this has had a strong impact on the effect that vertebral alignment resets.
Therefore how on the basis of existing technology,, improve the structure of awl nut nail, make it have bigger hold, can improve the reliability that cooperates with the human spine, avoid getting loose from the human spine, be the problem that those skilled in the art need solve at present.
The utility model content
The purpose of this utility model aims to provide a kind of pedicle nail that is used for spinal fixing device, and this pedicle nail has bigger hold, can improve the reliability that cooperates with the human spine.In addition, another purpose of the present utility model provides a kind of spinal fixation system that comprises above-mentioned awl nut nail.
For solving the problems of the technologies described above, this utility model provides a kind of pedicle nail, be used for spinal fixing device, comprise threaded rod and nail seat, described threaded rod comprises that the back segment portion and the leading portion portion of described threaded rod all offer first screw thread near the back segment portion of described nail seat with away from the described leading portion portion of following closely seat; The outside of described back segment portion also offers second screw thread.
Preferably, described second screw thread is identical with the pitch of described first screw thread.
Preferably, the scope of the pitch of described second screw thread is 2mm to 5mm.
Preferably, the pitch of described second screw thread is 3mm.
Preferably, be half of pitch of described second screw thread along the axial distance of described threaded rod between adjacent described first screw thread and described second screw thread in the described back segment portion.
Preferably, the scope of the length of described back segment portion is 3mm to 35mm.
Preferably, the scope of the length of described back segment portion is 15mm to 25mm.
Preferably, described nail seat offers U-lag.
The awl nut nail that is used for spinal fixing device provided by the utility model, it has threaded rod and nail seat, the threaded rod outside offers first screw thread, and threaded rod comprises that the outside of threaded rod back segment portion also offers second screw thread near the back segment portion of nail seat with away from the leading portion portion of following closely seat.
After will boring nut nail implant into body spinal column, the less spongy bone of the leading portion portion of threaded rod and human body bone density matches, and the cortical bone that the back segment portion of threaded rod and human body bone density are bigger matches.Because threaded rod offers first screw thread and second screw thread near the back segment portion of nail seat, the screw thread figure number of promptly boring nut nail screw-in cortical bone increases relatively, effectively strengthened the hold of awl nut nail, avoid boring the nut nail and from cortical bone, get loose, the bigger cortical bone of itself and bone density is well cooperated.Because the less spongy bone of the leading portion portion of threaded rod and bone density cooperates, this leading portion portion does not offer second screw thread and only keeps first screw thread, is in order to prevent from too much to destroy owing to the number of leads structure of spongy bone.
This shows, adopt such structure, make awl nut nail have bigger hold, can improve the reliability that cooperates with the human spine, avoided awl nut nail from the human spine, to get loose effectively.
In addition, for solving the problems of the technologies described above, this utility model also provides a kind of ridge awl fixture, comprises pitman; Described spinal fixing device also comprises a plurality of as above-mentioned each described pedicle nail, and described pitman is connected in the U-lag of each described awl nut nail.Because awl nut nail comprises above-mentioned technique effect, comprise that the spinal fixing device of this awl nut nail also comprises above-mentioned identical technique effect, do not repeat them here.
Description of drawings
Fig. 1 is the structural representation of awl nut nail in the prior art;
Fig. 2 provides the structural representation of awl nut nail for this utility model.
Wherein, the corresponding relation of Reference numeral and component names is among Fig. 1:
1 ' threaded rod; 2 ' nail seat; 11 ' back segment portion; 12 ' leading portion portion; 101 ' the first screw threads.
The corresponding relation of Reference numeral and component names is among Fig. 2:
1 threaded rod; 2 nail seats; 11 back segment portions; 12 leading portion portions; 101 first screw threads; 111 second screw threads; A back segment minister degree; B leading portion minister degree.
The specific embodiment
Core of the present utility model provides a kind of awl nut nail that is used for spinal fixing device, and it has bigger hold, can improve the reliability that cooperates with the human spine, avoids effectively getting loose from the human spine.Another core of the present utility model provides a kind of spinal fixing device that comprises above-mentioned awl nut nail.
In order to make those skilled in the art person understand this utility model scheme better, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 2, Fig. 2 provides the structural representation of awl nut nail for this utility model.
In one embodiment, as shown in Figure 2, pedicle nail provided by the utility model comprises threaded rod 1 and nail seat 2 two parts; Threaded rod 1 is awl nut nail and human spine's a link, and nail seat 2 is links of the pitman of awl nut nail and spinal fixing device.The back segment portion 11 of this threaded rod 1 and leading portion portion 12 all offer first screw thread 101, and threaded rod 1 comprises near the back segment portion 11 of nail seat 2 with away from the leading portion portion 12 of following closely seat 2, and the outside of back segment portion 11 also offers second screw thread 111.
After will boring nut nail implant into body spinal column, the less spongy bone of the leading portion portion 12 of threaded rod 1 and human body bone density matches, and the cortical bone that the back segment portion 11 of threaded rod 1 and human body bone density are bigger matches.Because threaded rod 1 is offered the first alternate screw thread 101 and second screw thread 111 near the back segment portion 11 of nail seat 2, the screw thread figure number of promptly boring nut nail screw-in cortical bone increases relatively, effectively strengthened the hold of awl nut nail, avoid boring the nut nail and from cortical bone, get loose, the bigger cortical bone of itself and bone density is well cooperated.Because the less spongy bone of the leading portion portion 12 of threaded rod 1 and bone density cooperates, this leading portion portion 12 does not offer second screw thread 111 and only keeps first screw thread 101, is the structure for the bigger hold destruction spongy bone that prevents to be brought by second screw thread 111.
This shows, adopt such structure, make awl nut nail have bigger hold, can match with the human spine well, avoided awl nut nail effectively because the little phenomenon that from the human spine, gets loose of hold.
Need to prove; the foregoing description does not limit for the numerical value of the pitch of the pitch of first screw thread and second screw thread; thereby no matter whether the pitch of first screw thread and the pitch of second screw thread equate that equal two kinds of technical schemes should be within protection domain of the present utility model.
Certainly, in order to improve the reliability that pedicle nail cooperates with the human spine, the structure of first screw thread 101 and second screw thread 111 can also be set further.
A kind of preferred embodiment in, the pitch of above-mentioned second screw thread 111 and first screw thread 101 can be identical.Because identical pitch, promptly first screw thread 101 is identical with the axial displacement that second screw thread 111 rotates a circle, this makes when awl nut nail precession human spine, the screw-in speed of the back segment portion 11 of awl nut nail is identical with the screw-in speed of leading portion portion 12, has kept the concordance of whole awl nut nail screw-in speed.The identical specification that meets thread standard spare of pitch of second screw thread 111 and first screw thread 101 makes that also the process for machining and manufacturing of this awl nut nail is simple and convenient.
Certainly, the pitch of above-mentioned second screw thread 111 and first screw thread 101 also can be slightly different, and those skilled in the art can select as required voluntarily.Every outside that is opened in the back segment portion 11 of above-mentioned threaded rod 1, and can strengthen second screw thread 111 of the hold of awl nut nail all should be in protection domain of the present utility model.
Particularly, in order further to improve the hold between pedicle nail and the human spine, the scope of the pitch of second screw thread 111 can be 2mm to 5mm, and more specifically, the pitch of second screw thread 111 can be 3mm.2mm to 5mm is the common pitch of regular screw threads, adopts such pitch scope, meets the specification of regular screw threads standard component, makes that also the process for machining and manufacturing of this awl nut nail is simple and convenient.
Need to prove, the span of above-mentioned 2mm to 5mm and the value of 3mm all be a kind of for example, obviously, no matter the pitch of second screw thread is got any numerical value, all should be within protection domain of the present utility model.
Can be half of the pitch of first screw thread 101 along the axial distance of threaded rod 1 between adjacent first screw thread 101 and second screw thread 111 in the above-mentioned back segment portion 11.Adopt this structure, promptly the distance between back segment portion 11 every adjacent tooth forms is half of pitch of first screw thread 101, the screw thread uniform distribution of threaded rod 1 back segment portion 11.When the human spine implants awl nut nail, can make that awl nut nail gait of march is even, the human spine is also stressed evenly, more helps human spine's the correction that resets.Second screw thread 111 and first screw thread, 101 uniform distribution also meet the specification of thread standard spare, make that also the process for machining and manufacturing of this awl nut nail is simple and convenient.
The length of threaded rod 1 back segment portion 11 can also further be set.
In the concrete embodiment of another kind, as shown in Figure 2, a represents the length of back segment portion 11 among the figure, and b represents the length of leading portion portion 12, and the scope of the length a of above-mentioned back segment portion 11 can be 3mm to 35mm.Because back segment portion 11 at threaded rod 1, first screw thread 101 and second screw thread 111 match with human spine's cortical bone jointly, and the human body cortical bone is in the human spine and is that thin layer distributes, its thickness is also in the scope of 3mm to 35mm, therefore adopt such setting, make the scope of length a of back segment portion 11 and human spine's the length range of cortical bone approaching, thereby make the back segment portion 11 of threaded rod 1 match with human spine's cortical bone better.
Particularly, the scope of the length a of above-mentioned back segment portion 11 can further be 15mm to 25mm.Because most of general populations' human spine's thickness of cortex of bone is 15mm to 25mm, the scope of the length a of the back segment portion 11 of threaded rod 1 is made as with most of general populations' thickness of cortex of bone approaching, makes this awl nut nail more meet most of general populations' human spine's the requirement of physiological structure.
The U-lag that communicates before and after can also being provided with on nail seat 2 middle parts of awl nut nail.When spinal fixing device was worked, the U-lag that the pitman of spinal fixing device passes each awl nut nail was attached thereto.
This utility model also provides a kind of spinal fixing device, and it comprises pitman, also comprises a plurality of above-mentioned pedicle nails, and pitman is connected in the U-lag of each described awl nut nail during work.Because awl nut nail has above-mentioned technique effect, comprise that the spinal fixing device of this awl nut nail also has identical technique effect.
More than spinal fixing device provided by the utility model and awl nut nail thereof are described in detail.Used specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof.Should be understood that; for those skilled in the art; under the prerequisite that does not break away from this utility model principle, can also carry out some improvement and modification to this utility model, these improvement and modification also fall in the protection domain of this utility model claim.
Claims (9)
1. pedicle nail, be used for spinal fixing device, comprise threaded rod (1) and nail seat (2), described threaded rod (1) comprises that the back segment portion (11) and the leading portion portion (12) of described threaded rod (1) all offer first screw thread (101) near the back segment portion (11) of described nail seat (2) with away from the described leading portion portion (12) of following closely seat (2); It is characterized in that the outside of described back segment portion (11) also offers second screw thread (111).
2. pedicle nail according to claim 1 is characterized in that, described second screw thread (111) is identical with the pitch of described first screw thread (101).
3. pedicle nail according to claim 2 is characterized in that, the scope of the pitch of described second screw thread (111) is 2mm to 5mm.
4. pedicle nail according to claim 3 is characterized in that, the pitch of described second screw thread (111) is 3mm.
5. pedicle nail according to claim 2, it is characterized in that it is half of pitch of described second screw thread (101) that described back segment portion (11) goes up between adjacent described first screw thread (101) and described second screw thread (111) along the axial distance of described threaded rod (101).
6. according to each described pedicle nail of claim 1-5, it is characterized in that the scope of the length of described back segment portion (11) is 3mm to 35mm.
7. pedicle nail according to claim 6 is characterized in that, the scope of the length of described back segment portion (11) is 15mm to 25mm.
8. according to each described pedicle nail of claim 1-5, it is characterized in that described nail seat (2) offers U-lag.
9. a spinal fixing device comprises pitman, it is characterized in that, described spinal fixing device also comprises a plurality of as each described pedicle nail of claim 1-8, and described pitman is connected in the U-lag of each described awl nut nail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200851513U CN202020525U (en) | 2011-03-28 | 2011-03-28 | Spine fixing device and pedicle screw thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200851513U CN202020525U (en) | 2011-03-28 | 2011-03-28 | Spine fixing device and pedicle screw thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202020525U true CN202020525U (en) | 2011-11-02 |
Family
ID=44845495
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200851513U Expired - Lifetime CN202020525U (en) | 2011-03-28 | 2011-03-28 | Spine fixing device and pedicle screw thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202020525U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105167835A (en) * | 2014-12-31 | 2015-12-23 | 天津正天医疗器械有限公司 | Locking screw |
-
2011
- 2011-03-28 CN CN2011200851513U patent/CN202020525U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105167835A (en) * | 2014-12-31 | 2015-12-23 | 天津正天医疗器械有限公司 | Locking screw |
| CN105167835B (en) * | 2014-12-31 | 2019-02-15 | 天津正天医疗器械有限公司 | Lock screw |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shanghai Sanyou Medical Devices Co., Ltd. Assignor: Shanghai Tateng Medical Device Co.,Ltd. Contract record no.: 2013310000032 Denomination of utility model: Spine fixing device and pedicle screw thereof Granted publication date: 20111102 License type: Exclusive License Record date: 20130507 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Wang Wenbo Inventor after: Lei Wei Inventor after: Liu Mingyan Inventor after: Wu Chunhui Inventor before: Wang Wenbo |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: WANG WENBO TO: WANG WENBO LEI WEI LIU MINGYAN WU CHUNHUI |
|
| 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: 201209 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 Devices Co., Ltd. Address before: 201209, 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 equipment Limited by Share Ltd Address before: 201807 Jiading District Jia Tang Road, Shanghai, No. 1988 Patentee before: Shanghai Sanyou Medical Devices Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20111102 |
|
| CX01 | Expiry of patent term |