CN102670295B - Internal fixation device of spine - Google Patents
Internal fixation device of spine Download PDFInfo
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- CN102670295B CN102670295B CN201210181370.0A CN201210181370A CN102670295B CN 102670295 B CN102670295 B CN 102670295B CN 201210181370 A CN201210181370 A CN 201210181370A CN 102670295 B CN102670295 B CN 102670295B
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- connecting plate
- spine
- slide block
- fixation device
- internal fixation
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Abstract
The invention discloses an internal fixation device of a spine, which comprises a nail body, a locking nut, a connecting plate and a sliding block, wherein the connecting plate is provided with a long groove, the sliding block is provided with a through hole, the sliding block is matched with the connecting plate and can move along the long grove, the nail body penetrates through the through hole and the long groove, the locking nut is in threaded connection with the nail body, and the nail body is located by the locking nut. When the spine is restored, the nail body of the internal fixation device of spine is implanted in the spine and penetrates through the sliding block and the connecting plate, and the sliding block can move along the long groove of the connecting plate, so that the restoring regulation of the nail body is realized; and then the nail body is locked by the locking nut, and in the locking process, because the through hole of the sliding block is used for limiting the position of the nail body, the restoring loss can not be caused. According to the internal fixation device of the spine, the restoring loss in a restoring locking process is eliminated, and the spine can obtain a better restoring effect.
Description
Technical field
The present invention relates to technical field of medical instruments, particularly relate to a kind of internal fixation device of spine.
Background technology
In recent years, along with spinal biomechanics research and the development of material science, internal fixation of spine technology is in spinal column degenerative disease, tumor of spine, wound to such an extent as to be widely applied in the operative treatments such as Spondylitis.
The apparatus that internal fixation of spine operation uses comprises internal fixation device of spine and rod.First internal fixation device of spine is fixed on vertebral body, then rod is arranged in internal fixation device of spine, make internal fixation device of spine relative with rod fixing.Operation internal fixation device of spine moves, and vertebral body is moved, realizes the orthopedic reset to vertebral body.
Please refer to Fig. 1, Fig. 1 is the structural representation of a kind of typical internal fixation device of spine and rod, and Fig. 2 is the structural representation of the internal fixation device of spine shown in Fig. 1, and Fig. 3 is the side view of the internal fixation device of spine shown in Fig. 2.
Rivet nut 1` is arranged in the vertical through holes of nail seat 2`, and rivet nut 1` can rotate around the axis of himself, and the thread segment of rivet nut 1` lower end implants vertebral body, and excellent 3` is successively through the longitudinal hole 21` of nail seat 2`, and the trend of excellent 3` is the trend of spinal column.
Rivet nut 1` is assemblied in nail seat 2` by spherical cover 6`, assembles secondary gear piece 5` and locking nut 4` successively on the upside of spherical cover 6`, and the adjustable angle of spherical cover 6` makes its axes normal in longitudinal hole 21`, and its place plane is parallel to the axis of excellent 3`.
Regulate internal fixation device of spine, the reset of vertebral body can be realized, the vertebral body resetted is fixed, vertebral body can be made to recover its original curve.But in practical operation, after internal fixation device of spine resets, in the process of being fixed by locking nut 4`, can produce resets loses, and make vertebral body not recover its original curve completely, reset effect is bad.
Therefore, how reducing the reset of internal fixation device of spine in reset operation process and lose, make vertebral body obtain good orthopedic reset effect, is the technical problem that those skilled in the art are badly in need of solving at present.
Summary of the invention
The object of this invention is to provide a kind of internal fixation device of spine, the reset that this internal fixation device of spine can be eliminated in reset locking process is lost, and vertebral body can obtain good reset effect.
In order to realize above-mentioned technical purpose, the invention provides a kind of internal fixation device of spine, comprise rivet nut, locking nut, connecting plate and slide block, described connecting plate has elongated slot, described slide block has through hole, and described slide block and described connecting plate matched merge and can move along described elongated slot; Described rivet nut is through described through hole and described elongated slot; Described locking nut is threaded with described rivet nut, and described rivet nut is located by described locking nut.
Preferably, the both sides of the elongated slot of described connecting plate have chuck, and described chuck is along two long limit distributions of described elongated slot, and the two ends of described slide block have the fixture block coordinated with described chuck.
Preferably, the faying face of described slide block and described connecting plate is arc surface, and the faying face of described rivet nut and described slide block or described connecting plate is also arc surface.
Preferably, the through hole of described slide block is elliptical aperture, the major axis of described ellipse and the long axis normal of described elongated slot.
Preferably, described slide block is positioned on the downside of described connecting plate; The upside of described connecting plate has groove, and the downside of described locking nut has the boss with described groove fit.
Preferably, described slide block is positioned on the upside of described connecting plate, and the upside of described slide block has groove, and described locking nut has the boss with described groove fit.
Preferably, also comprise afterbody pipe, described afterbody pipe and described rivet nut removably connect.
Preferably, described rivet nut is connected with described afterbody gas thread, and the female thread on described rivet nut top is connected with described afterbody pipe, and external screw thread is connected with described locking nut.
Preferably, described rivet nut and described afterbody pipe are hollow structure.
Preferably, in the elongated slot of described connecting plate, two described rivet nuts are at least set.
The invention provides a kind of internal fixation device of spine, comprise rivet nut, locking nut, connecting plate and slide block, connecting plate has elongated slot, and slide block has through hole, and slide block and connecting plate matched merge and can move along elongated slot; Rivet nut is through through hole and elongated slot; Locking nut is threaded with rivet nut, and rivet nut is located by locking nut.
When carrying out corpus vertebrae replacement operation, the rivet nut of internal fixation device of spine is implanted vertebral body, rivet nut is through slide block and connecting plate, slide block can move along the elongated slot of connecting plate, the reset realizing rivet nut regulates, and then locks rivet nut by locking nut, in locking process, because the through hole of slide block is to the restriction of rivet nut position, can not produce resets loses.The reset that the internal fixation device of spine of this structure eliminates in reset locking process is lost, and vertebral body can obtain good reset effect.
In a kind of mode, the both sides of the elongated slot of described connecting plate have chuck, and described chuck is along two long limit distributions of described elongated slot, and the two ends of described slide block have the fixture block coordinated with described chuck.
Slide block is coordinated with the chuck of connecting plate by the fixture block at its two ends, and slide block is realized along the movement of elongated slot by the relative sliding of fixture block and chuck.
Concrete, the through hole of described slide block is elliptical aperture, the major axis of described ellipse and the long axis normal of described elongated slot.
Rivet nut is through the through hole of slide block, and rivet nut can carry out position adjustments at the long axis direction of elliptical aperture, achieves the lateral adjustments of internal fixation device of spine.
In a kind of embodiment, described slide block is positioned on the downside of described connecting plate; The upside of described connecting plate has groove, and the downside of described locking nut has the boss with described groove fit.
Rivet nut first through the through hole of slide block, then through the elongated slot of connecting plate, is then locked by locking nut, and the groove fit on the upside of the downside of locking nut and connecting plate, realizes fixing.
In another kind of embodiment, described slide block is positioned on the upside of described connecting plate, and the upside of described slide block has groove, and described locking nut has the boss with described groove fit.
Rivet nut first through the elongated slot of connecting plate, then through the through hole of slide block, is then locked by locking nut, and the groove fit on the upside of the downside of locking nut and slide block, realizes fixing.
In another kind of mode, also comprise afterbody pipe, described afterbody pipe and described rivet nut removably connect.The rivet nut with afterbody pipe is longer, conveniently carries out implant procedure and reset operation, after rivet nut is fixing, can take off afterbody pipe.
Concrete, described rivet nut can be threaded with described afterbody pipe, then the female thread on described rivet nut top is connected with described afterbody pipe, and external screw thread is connected with described locking nut.
In a kind of preferred mode, two described rivet nuts are at least set in the elongated slot of described connecting plate.
When carrying out corpus vertebrae replacement, determine the quantity of the rivet nut implanted according to the concrete condition of vertebral body, i.e. the quantity of the interior rivet nut arranged of the elongated slot of connecting plate.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of typical internal fixation device of spine and rod;
Fig. 2 is the structural representation of the internal fixation device of spine shown in Fig. 1;
Fig. 3 is the side view of the internal fixation device of spine shown in Fig. 2;
Fig. 4 is the structural representation of a kind of detailed description of the invention of internal fixation device of spine provided by the present invention;
Fig. 5 is the side view cutaway drawing of the internal fixation device of spine shown in Fig. 4;
The structural representation of the connecting plate that Fig. 6 is the internal fixation device of spine shown in Fig. 4 and a kind of detailed description of the invention of slide block;
The top view that Fig. 7 is the connecting plate shown in Fig. 6 and slide block;
The structural representation of a kind of detailed description of the invention of locking nut that Fig. 8 is the internal fixation device of spine shown in Fig. 4.
Detailed description of the invention
Core of the present invention is to provide a kind of internal fixation device of spine, and the reset that this internal fixation device of spine can be eliminated in reset locking process is lost, and vertebral body can obtain good reset effect.
In order to make those skilled in the art person understand the present invention program better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Please refer to Fig. 4 and Fig. 5, Fig. 4 is the structural representation of a kind of detailed description of the invention of internal fixation device of spine provided by the present invention, and Fig. 5 is the side view cutaway drawing of the internal fixation device of spine shown in Fig. 4.
In a kind of concrete embodiment, the invention provides a kind of internal fixation device of spine, comprise rivet nut 1, locking nut 2, connecting plate 3 and slide block 4, described connecting plate 3 has elongated slot 31, described slide block 4 has through hole 41, and described slide block 4 coordinates with described connecting plate 3 and can move along described elongated slot 31; Described rivet nut 1 is through described through hole 41 and described elongated slot 31; Described locking nut 2 is threaded with described rivet nut 1, and described rivet nut 1 is located by described locking nut 2.
When carrying out corpus vertebrae replacement operation, the rivet nut 1 of internal fixation device of spine is implanted vertebral body, rivet nut 1 is through slide block 4 and connecting plate 3, slide block 4 can move along the elongated slot 31 of connecting plate 3, the reset realizing rivet nut 1 regulates, and then locks rivet nut 1 by locking nut 2, in locking process, due to the restriction of through hole 41 pairs of rivet nut 1 positions of slide block 4, can not produce resets loses.The reset that the internal fixation device of spine of this structure eliminates in reset locking process is lost, and vertebral body can obtain good reset effect.
Please refer to Fig. 6 and Fig. 7, the structural representation of the connecting plate that Fig. 6 is the internal fixation device of spine shown in Fig. 4 and a kind of detailed description of the invention of slide block, the top view that Fig. 7 is the connecting plate shown in Fig. 6 and slide block.
In embodiment concrete further, the both sides of the elongated slot 31 of described connecting plate 3 have chuck 32, and described chuck 32 is along two long limit distributions of described elongated slot 31, and the two ends of described slide block 4 have the fixture block 42 coordinated with described chuck 32.
Slide block 4 is coordinated with the chuck 32 of connecting plate 3 by the fixture block 42 at its two ends, and slide block 4 is realized along the movement of elongated slot 31 by the relative sliding of fixture block 42 with chuck 32.Chuck 32 is equivalent to be arranged on the track outside elongated slot 31 liang of long limits, and when fixture block 42 slides along chuck 32, namely slide block 4 moves along elongated slot 31.
Fixture block 42 coordinates the version that can be set to as shown in Figure 6 with chuck 32, the structure that fixture block 42 embeds the chuck 32 of rail mounted can also be set to, certainly, the version that fixture block 42 matches with chuck 32 is not only confined to situation as above, other can relative engagement slide version also can apply in the present invention.
Concrete, described slide block 4 is arc surface with the faying face of described connecting plate 3, and described rivet nut 1 is also arc surface with the faying face of described slide block 4 or described connecting plate 3.
The faying face contacted in rivet nut 1, connecting plate 3 and slide block 4 three is arc surface, makes rivet nut 1 have good degree of freedom, can rotate certain angle, the adjustment of position in facilitating rivet nut 1 to reset.
Preferably, the through hole 41 of described slide block 4 is elliptical aperture, the major axis of described ellipse and the long axis normal of described elongated slot 31.
Rivet nut 1 is through the through hole 41 of slide block 4, and when through hole 41 is elliptical aperture, rivet nut 1 can carry out position adjustments at the long axis direction of elliptical aperture, achieves the lateral adjustments of internal fixation device of spine.
It should be noted that, the direction of the major axis of elongated slot 31 is longitudinally, the trend of longitudinal direction and spinal column; Be laterally with the direction of the long axis normal of elongated slot 21, laterally perpendicular to the trend of spinal column.Slide block 4 coordinates with connecting plate 3 makes vertebral body both achieve longitudinally to regulate and also achieve lateral adjustments.
Please refer to Fig. 8, the structural representation of a kind of detailed description of the invention of locking nut that Fig. 8 is the internal fixation device of spine shown in Fig. 4.
In a kind of concrete embodiment, described slide block 4 is positioned on the downside of described connecting plate 3; The upside of described connecting plate 3 has groove 33, and the downside of described locking nut 2 has the boss 21 coordinated with described groove 33.
Rivet nut 1 first through the through hole 41 of slide block 4, then passes the elongated slot 31 of connecting plate 3, and then locked by locking nut 2, the boss 21 of the downside of locking nut 2 coordinates with the groove 33 on the upside of connecting plate 3, realizes fixing.
In another kind of concrete embodiment, described slide block 4 is positioned on the upside of described connecting plate 3, and the upside of described slide block 4 has groove, and described locking nut 2 has the boss 21 with described groove fit.
Rivet nut 1 first through the elongated slot 31 of connecting plate 3, then through the through hole 41 of slide block 4, is then locked by locking nut 2, and the groove fit on the upside of the boss 21 of the downside of locking nut 2 and slide block 41, realizes fixing.
The boss 21 of locking nut 2 can be spheric, and spherical and above-mentioned groove fit, the faying face contacted therebetween achieves and is locked.Certainly, locking nut 2 also can be other structures with the faying face of groove.
One preferred embodiment in, also comprise afterbody pipe 5, described afterbody pipe 5 and described rivet nut 1 removably connect.
The rivet nut 1 be connected with afterbody pipe 5 is longer, more convenient when carrying out implant procedure and reset operation to vertebral body, after fixing for rivet nut 1, can take off afterbody pipe 5, when needing to adjust rivet nut 1, can be installed in rivet nut 1 by afterbody pipe 5 again.
In further embodiment, described rivet nut 1 is threaded with described afterbody pipe 5, and the female thread on described rivet nut 1 top is connected with described afterbody pipe 5, and external screw thread is connected with described locking nut 2.
Obviously, rivet nut 1 is not limited only to be threaded with the connected mode of afterbody pipe 5, and the connected mode of other convenient disassemblies also can be applied in the present invention, such as clamp connection.
Further in detailed description of the invention, described rivet nut 1 is hollow structure with described afterbody pipe 5.
Rivet nut 1 and afterbody pipe 5 can be hollow structure on the basis meeting himself hardness strength, can reduce the weight of internal fixation device of spine like this, reduce the gravity of the internal fixation device of spine self being applied to vertebral body, contribute to the reset of vertebral body.
For the various embodiments described above, two described rivet nuts 1 are at least set in the elongated slot 31 of described connecting plate 3.
When carrying out corpus vertebrae replacement, determine the quantity of the rivet nut 1 implanted according to the concrete condition of vertebral body, namely the quantity of the interior rivet nut 1 arranged of elongated slot 31 of connecting plate 3, also determines the length of connecting plate 3.
In order to contribute to the reset of vertebral body, connecting plate 3 has certain radian usually, and the radian of connecting plate 3 can be set to any position of spinal column all can be general, also can arrange the connecting plate 3 with specific arc specially for the needs of spinal column particular location.
In the application of reality, all rivet nuts 1 implanting vertebral body can be fixed with same connecting plate 3, also can arrange multiple connecting plate 3, make to share a connecting plate 3 at a distance of nearer rivet nut 1.
Above internal fixation device of spine provided by the present invention is described in detail.Apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (9)
1. an internal fixation device of spine, it is characterized in that, comprise rivet nut (1), locking nut (2), connecting plate (3) and slide block (4), described connecting plate (3) has elongated slot (31), described slide block (4) has through hole (41), and described slide block (4) coordinates with described connecting plate (3) and can be mobile along described elongated slot (31); Described rivet nut (1) is through described through hole (41) and described elongated slot (31); Described locking nut (2) is threaded with described rivet nut (1), and described rivet nut (1) is located by described locking nut (2);
Two described rivet nuts (1) are at least set in the elongated slot (31) of described connecting plate (3);
Described connecting plate (3) has certain radian.
2. internal fixation device of spine as claimed in claim 1, it is characterized in that, the both sides of the elongated slot (31) of described connecting plate (3) have chuck (32), described chuck (32) is along two long limit distributions of described elongated slot (31), and the two ends of described slide block (4) have the fixture block (42) coordinated with described chuck (32).
3. internal fixation device of spine as claimed in claim 2, it is characterized in that, described slide block (4) is arc surface with the faying face of described connecting plate (3), and described rivet nut (1) is also arc surface with the faying face of described slide block (4) or described connecting plate (3).
4. internal fixation device of spine as claimed in claim 3, it is characterized in that, the through hole (41) of described slide block (4) is elliptical aperture, the major axis of described ellipse and the long axis normal of described elongated slot (31).
5. internal fixation device of spine as claimed in claim 4, is characterized in that, described slide block (4) is positioned at described connecting plate (3) downside; The upside of described connecting plate (3) has groove (33), and the downside of described locking nut (2) has the boss (21) coordinated with described groove (33).
6. internal fixation device of spine as claimed in claim 4, it is characterized in that, described slide block (4) is positioned at described connecting plate (3) upside, the upside of described slide block (4) has groove, and described locking nut (2) has and the boss of described groove fit (21).
7. the internal fixation device of spine as described in any one of claim 1 to 6, is characterized in that, also comprises afterbody pipe (5), and described afterbody pipe (5) and described rivet nut (1) removably connect.
8. internal fixation device of spine as claimed in claim 7, it is characterized in that, described rivet nut (1) is threaded with described afterbody pipe (5), the female thread on described rivet nut (1) top is connected with described afterbody pipe (5), and external screw thread is connected with described locking nut (2).
9. internal fixation device of spine as claimed in claim 8, is characterized in that, described rivet nut (1) and described afterbody pipe (5) are hollow structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210181370.0A CN102670295B (en) | 2012-06-04 | 2012-06-04 | Internal fixation device of spine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210181370.0A CN102670295B (en) | 2012-06-04 | 2012-06-04 | Internal fixation device of spine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102670295A CN102670295A (en) | 2012-09-19 |
| CN102670295B true CN102670295B (en) | 2015-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210181370.0A Active CN102670295B (en) | 2012-06-04 | 2012-06-04 | Internal fixation device of spine |
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| Country | Link |
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| CN (1) | CN102670295B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102920502B (en) * | 2012-11-09 | 2014-10-08 | 上海三友医疗器械有限公司 | Extension sheets of pedicle screw tail, expander, and tamper reset rod |
| CN107212918A (en) * | 2017-07-07 | 2017-09-29 | 遵义医学院附属医院 | It is a kind of to prevent from resetting the internal fixation device of spine lost |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5368594A (en) * | 1991-09-30 | 1994-11-29 | Fixano S.A. | Vertebral osteosynthesis device |
| US5425732A (en) * | 1992-01-16 | 1995-06-20 | Ulrich; Heinrich | Implant for internal fixation, particularly spondylodesis implant |
| CN101366656A (en) * | 2007-08-16 | 2009-02-18 | 上海锐植医疗器械有限公司 | Dynamic spine internal fixation system |
| CN101516282A (en) * | 2006-09-18 | 2009-08-26 | 华沙整形外科股份有限公司 | Orthopedic plate system |
| CN102068303A (en) * | 2011-01-13 | 2011-05-25 | 邱勇 | Pedicle screw |
| CN202589632U (en) * | 2012-06-04 | 2012-12-12 | 上海拓腾医疗器械有限公司 | Spine internal fixing device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2773106B2 (en) * | 1995-10-06 | 1998-07-09 | 株式会社ロバート・リード商会 | Vertebral fixation device |
-
2012
- 2012-06-04 CN CN201210181370.0A patent/CN102670295B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5368594A (en) * | 1991-09-30 | 1994-11-29 | Fixano S.A. | Vertebral osteosynthesis device |
| US5425732A (en) * | 1992-01-16 | 1995-06-20 | Ulrich; Heinrich | Implant for internal fixation, particularly spondylodesis implant |
| CN101516282A (en) * | 2006-09-18 | 2009-08-26 | 华沙整形外科股份有限公司 | Orthopedic plate system |
| CN101366656A (en) * | 2007-08-16 | 2009-02-18 | 上海锐植医疗器械有限公司 | Dynamic spine internal fixation system |
| CN102068303A (en) * | 2011-01-13 | 2011-05-25 | 邱勇 | Pedicle screw |
| CN202589632U (en) * | 2012-06-04 | 2012-12-12 | 上海拓腾医疗器械有限公司 | Spine internal fixing device |
Non-Patent Citations (1)
| Title |
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| JP特开平9-98983A 1997.04.15 * |
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| CN102670295A (en) | 2012-09-19 |
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Owner name: SHANGHAI SANYOU MEDICAL EQUIPMENT CO., LTD. Free format text: FORMER OWNER: SHANGHAI TATENG MEDICAL DEVICE CO.,LTD. Effective date: 20140716 |
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Effective date of registration: 20140716 Address after: 201800, 1988, Jia Tong Road, Jiading District, Shanghai, Jiading District Applicant after: Shanghai Sanyou Medical Devices Co., Ltd. Address before: 201209, Pudong New Area, Shanghai Qing Road 356, 3, 2 floor Applicant before: Shanghai Tateng Medical Device Co.,Ltd. |
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Address after: 201807 Jiading District Jia Tang Road, Shanghai, No. 1988 Patentee after: Shanghai Sanyou medical equipment Limited by Share Ltd Address before: 201800, 1988, Jia Tong Road, Shanghai, Jiading District Patentee before: Shanghai Sanyou Medical Devices Co., Ltd. |