CN201441445U - Fixer in spine - Google Patents
Fixer in spine Download PDFInfo
- Publication number
- CN201441445U CN201441445U CN2009200283594U CN200920028359U CN201441445U CN 201441445 U CN201441445 U CN 201441445U CN 2009200283594 U CN2009200283594 U CN 2009200283594U CN 200920028359 U CN200920028359 U CN 200920028359U CN 201441445 U CN201441445 U CN 201441445U
- Authority
- CN
- China
- Prior art keywords
- pedicle screw
- pedestal
- screw
- vertebral pedicle
- locking 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
Links
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 46
- 238000009434 installation Methods 0.000 abstract description 8
- 238000010008 shearing Methods 0.000 abstract 1
- 208000007103 Spondylolisthesis Diseases 0.000 description 3
- 206010039722 scoliosis Diseases 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 206010041569 spinal fracture Diseases 0.000 description 2
- 208000010392 Bone Fractures Diseases 0.000 description 1
- 206010017076 Fracture Diseases 0.000 description 1
- 210000000988 bone and bone Anatomy 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000000693 hamate bone Anatomy 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 208000015122 neurodegenerative disease Diseases 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
Images
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- Surgical Instruments (AREA)
Abstract
The utility model relates to a fixer in a spine, which comprises a vertebral pedicle screw, a base, a locking nut, a locking screw and a connecting stick. A vertebral pedicle screw installment hole and a connecting stick installment hole are respectively arranged on different sides of the base; the vertebral pedicle screw is provided with a sphere structure which is matched with a concave sphere arranged at the lower part of the vertebral pedicle screw installment hole; the bottom of the locking nut is connected with a press plate with teeth; the base is provided with an arc-shaped boss with teeth; the teeth on the press plate and the teeth on the base are meshed; and the locking nut and the vertebral pedicle screw are connected and locked in a matching way and are installed on the base together. The bottom of the press plate of the fixer is a concave cambered surface with teeth; the upper part of the vertebral pedicle screw installment hole is in a flaring structure with a flaring angle of 20 degrees. Since the fixer in a spine can disperse stress acted on the vertebral pedicle screw during installation, screw breaking and screw release can be avoided, side shearing force resistance can be improved; when in installment, both the base and the vertebral pedicle screw can be arranged at ideal positions, therefore, the fixer in a spine can be operated flexibly and conveniently.
Description
Technical field
This utility model relates to a kind of bone surgery medical apparatus, specifically a kind of internal fixation of spine device that is used for backbone correcting.
Background technology
We know, at present, the disease to other unstable spines such as the correction of spinal trauma, fracture, lumbar spondylolisthesis and scoliosis, spinal column degenerative diseases adopts the spinal fixation device to fix more.Existing spinal fixation device kind is more, mainly contain the Ha Shi rod, apparatuses such as Shandong Ge Shi rod, by pedicle nail or universal pedicle nail, hamulus of hamate bone etc. composition is installed, pedicle nail has long screw thread pedicle nail, and it is fixed on the pedestal, fixes by locking nut, the relative pedestal of pedicle nail generally can not pendulum angle, and just the relative pedicle nail of pedestal can not be adjusted angle.Be applied to the stress on the pedicle nail during installation, the broken nail that stress concentration is caused or take off phenomenon such as nail and take place, the operation installation difficulty is big, the operation underaction is convenient, also has a strong impact on the effect of operation.
Summary of the invention
Technical problem to be solved in the utility model is to overcome above-mentioned the deficiencies in the prior art, provide a kind of simple in structure, locking is convenient, the relative pedestal adjustable swing of pedicle nail angle, disperseed stress effectively, avoid broken nail or taken off nail, strengthened the internal fixation of spine device of anti-lateral shear power.
The technical scheme in the invention for solving the above technical problem is: a kind of internal fixation of spine device, it is by pedicle screw, pedestal, locking nut, lock-screw and pitman are formed, antarafacial is provided with pedicle screw installing hole and pitman installing hole on the pedestal, pitman is locked by lock-screw, it is characterized in that: the long screw thread top of said pedicle screw has spherical structure, the concave spherical surface that is provided with pedicle screw installing hole bottom on the pedestal matches, the locking nut bottom that is positioned at pedicle screw installing hole top flexibly connects a toothed pressing plate, pedestal is provided with toothed arc boss, tooth on the pressing plate is meshed with tooth on the pedestal arc boss, locking nut is connected locking with the pedicle screw threaded engagement, is installed on the pedestal together.
The said pressing plate of this utility model is provided with the pedicle screw through hole, and the bottom surface is toothed cancave cambered surface.
The said pedestal pedicle screw of this utility model installing hole top is the enlarging structure, and flaring angle is 20 °.The pedicle screw installing hole of enlarging structure allows long screw thread pedicle screw to swing within it, and the full swing angle [alpha] is 20 °, and the pedicle nail after just connecting can be swung in 20 ° of angle ranges and circle round.The relative pedicle nail of pedestal can be adjusted angle easily like this, and then by the pedestal pitman that is locked.
This utility model is owing to the spherical structure on the pedicle screw matches with the concave spherical surface of pedestal pedicle screw installing hole, the relative pedicle nail of pedestal can be adjusted setting angle, against existing technologies, this utility model is eliminated effectively and has been disperseed to be applied to when installing stress on the pedicle nail, the broken nail probability that stress concentration is caused is near minimum, avoid broken nail or taken off nail, strengthened anti-lateral shear power, the position of pedestal, pedicle nail all easier can be in the ideal position of requirement during installation, the operation installation difficulty reduces, flexible and convenient operation.This utility model can be used for the uses such as correction of spinal fracture, lumbar spondylolisthesis and scoliosis.
Description of drawings
The utility model will be further described below in conjunction with accompanying drawing:
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is this utility model perspective view.
Fig. 3 is this utility model partition structural representation.
Fig. 4 is the generalized section of this utility model pedestal pedicle screw installing hole.
1. pedicle screws among the figure, 2. pedestal, 3. locking nut, 4. lock-screw, 5. pitman.
The specific embodiment
From Fig. 1, Fig. 2, Fig. 3 as can be seen, a kind of internal fixation of spine device, it is made up of pedicle screw 1, pedestal 2, locking nut 3, lock-screw 4 and pitman 5, antarafacial is provided with pedicle screw installing hole and pitman installing hole on the pedestal 2, and pitman 5 is locked on pedestal 2 by lock-screw 4.
Characteristics of the present utility model are: the long screw thread top of said pedicle screw 1 has spherical structure 11, and the middle part is provided with the screw thread 12 that cooperates with locking nut 3.The concave spherical surface 21 that pedicle screw installing hole bottom is provided with on the pedestal 2, pedestal 2 are provided with toothed arc boss 22, and pedestal 2 pedicle screw installing hole tops are enlarging structure 23, and flaring angle is 20 °.The locking nut 3 that is positioned at pedestal 2 pedicle screw installing hole tops is provided with female thread 32, and the bottom flexibly connects a toothed pressing plate 30.Locking nut 3 axially is connected by the annular snap platform with pressing plate 30, and as shown in Figure 1, pressing plate 30 does not rotate with locking nut 3.Said pressing plate 30 is provided with the pedicle screw through hole, and the bottom surface is the cancave cambered surface of band tooth 31.Pedestal 2 is provided with toothed arc boss 22, tooth 31 on the pressing plate is meshed with tooth on the pedestal arc boss 22, locking nut 3 is connected locking with pedicle screw 1 threaded engagement, by the tooth engagement fit on tooth on the pressing plate 31 and the pedestal arc boss 22, is installed on the pedestal 2 together.
As shown in Figure 4.The said pedestal of this utility model 2 pedicle screw installing hole tops are enlarging structure 23, and flaring angle is 20 °.The pedicle screw installing hole of enlarging structure like this allows long screw thread pedicle screw 1 to swing within it, and the full swing angle [alpha] is 20 °, and the pedicle nail after just connecting can be swung in 20 ° of angle ranges and circle round.Pedestal 3 relative pedicle nails 1 can be adjusted angle more easily like this, and then by the pedestal pitman that is locked.
Spherical structure on this utility model pedicle screw matches with the concave spherical surface of pedestal pedicle screw installing hole, the relative pedestal adjustable swing of pedicle nail angle, be applied to the stress on the pedicle nail when having eliminated effectively by installation, the broken nail probability that stress concentration is caused is near minimum, avoid broken nail or taken off nail, strengthened anti-lateral shear power, the position of pedestal, pedicle nail all easier can be in the ideal position of requirement during installation, the operation installation difficulty reduces, flexible and convenient operation.This utility model can be used for the uses such as correction of spinal fracture, lumbar spondylolisthesis and scoliosis.
Claims (3)
1. internal fixation of spine device, it is by pedicle screw, pedestal, locking nut, lock-screw and pitman are formed, antarafacial is provided with pedicle screw installing hole and pitman installing hole on the pedestal, pitman is locked by lock-screw, it is characterized in that: the long screw thread top of said pedicle screw has spherical structure, the concave spherical surface that is provided with pedicle screw installing hole bottom on the pedestal matches, the locking nut bottom that is positioned at pedicle screw installing hole top flexibly connects a toothed pressing plate, pedestal is provided with toothed arc boss, tooth on the pressing plate is meshed with tooth on the pedestal arc boss, locking nut is connected locking with the pedicle screw threaded engagement, is installed on the pedestal together.
2. internal fixation of spine device according to claim 1 is characterized in that: said pressing plate is provided with the pedicle screw through hole, and the bottom surface is toothed cancave cambered surface.
3. internal fixation of spine device according to claim 1 is characterized in that: said pedestal pedicle screw installing hole top is the enlarging structure, and flaring angle is 20 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200283594U CN201441445U (en) | 2009-06-29 | 2009-06-29 | Fixer in spine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200283594U CN201441445U (en) | 2009-06-29 | 2009-06-29 | Fixer in spine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201441445U true CN201441445U (en) | 2010-04-28 |
Family
ID=42546120
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200283594U Expired - Fee Related CN201441445U (en) | 2009-06-29 | 2009-06-29 | Fixer in spine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201441445U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109549696A (en) * | 2017-09-27 | 2019-04-02 | 上海三友医疗器械股份有限公司 | A kind of adjustable double flute internal fixation device of spine and bone screws |
-
2009
- 2009-06-29 CN CN2009200283594U patent/CN201441445U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109549696A (en) * | 2017-09-27 | 2019-04-02 | 上海三友医疗器械股份有限公司 | A kind of adjustable double flute internal fixation device of spine and bone screws |
| CN109549696B (en) * | 2017-09-27 | 2024-03-22 | 上海三友医疗器械股份有限公司 | Adjustable double-groove spine internal fixation device and bone screw |
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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 |
Granted publication date: 20100428 Termination date: 20150629 |
|
| EXPY | Termination of patent right or utility model |