CN202458646U - Posterior lumbar dynamic fixing device - Google Patents
Posterior lumbar dynamic fixing device Download PDFInfo
- Publication number
- CN202458646U CN202458646U CN2012200237653U CN201220023765U CN202458646U CN 202458646 U CN202458646 U CN 202458646U CN 2012200237653 U CN2012200237653 U CN 2012200237653U CN 201220023765 U CN201220023765 U CN 201220023765U CN 202458646 U CN202458646 U CN 202458646U
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- helical spring
- pitman
- horizontal
- contiguous block
- connecting rod
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Abstract
A posterior lumbar dynamic fixing device relates to a motive power stabilizing device which fixes a lumbar through a pedicle of vertebral arch. The posterior lumbar dynamic fixing device is provided with two coiled spring connecting levers, and the upper end portion and the lower end portion of each coiled spring connecting lever are respectively provided with a pedicle of vertebral arch screw. The middle of each coiled spring connecting lever is provided with at least two circles of coiled springs, and the upper portion and the lower portion of each coiled spring connecting lever are provided with a transverse connecting block, wherein the transverse connecting blocks on the upper portions of the two coiled spring connecting levers are fixedly connected with a transverse connecting rod, and the transverse connecting blocks on the lower portions of the two coiled spring connecting levers are fixedly connected with a transverse connecting rod.
Description
Technical field
This utility model relates to a kind of orthopaedics and uses internal fixation device, especially relates to the fixedly dynamical stability device of lumbar vertebra of a kind of pedicle.
Background technology
The pedicle fixedly dynamical stability device of lumbar vertebra can Wicresoft be implanted, and does not destroy spine structures such as intervertebral disc, is that the lumbar vertebral posterior dynamic fixing is used the most a kind of.The existing pedicle fixedly dynamical stability device of lumbar vertebra can be divided into low rigidity flexible fastening, the fixing two kinds of designs of hinge type.Hinge type fixes (Cosmic etc.) though the range of activity of preservation spinal; But owing to be not real flexible fastening, the movable bump that produces of initial and whole spinal column in latter stage, the stress that fixture is born is also inhomogeneous; Simultaneously its ability of sharing load a little less than, the risk of internal fixation failure is relatively large.Low rigidity fixture has the spring assembly (like DSS II etc.) of low elastic modulus, and wherein two DSS II spring assemblies use two helical spring pitmans, and the middle part of every helical spring pitman is provided with helical spring, both ends are straight-bar up and down.The upper end of left and right two helical spring pitmans and bottom are respectively established a pedicle screw and are locked respectively in the and arranged on left and right sides pedicle of vertebral arch of upper and lower two pleurocentrums of unstability spinal column.Two DSS spring assemblies are the unstability spinal column fixedly, though more satisfactory, mostly the material of existing helical spring pitman is the above titanium alloy of 75GPa, and elastic modelling quantity is higher, and helical spring pitman diameter is thinner, is generally the 3-5 millimeter, and size is disunity also.The diameter that the helical spring pitman is thinner also must cause its fatigue resistance less, and long-term effect is doubtful.Simultaneously, this pair of DSS spring assembly rotational stabilization is relatively poor.
The utility model content
This utility model aims to provide that a kind of fatigue resistance is big, rotational stabilization better, the lumbar vertebral posterior dynamic fixation device of preservation spinal mobility at utmost simultaneously.
The technical scheme of this utility model is: a kind of lumbar vertebral posterior dynamic fixation device, have two helical spring pitmans, and a pedicle screw is established in the upper end of every helical spring pitman and bottom; The helical spring at every helical spring pitman middle part has two circles at least; A horizontal contiguous block is established in the upper and lower of every helical spring pitman; The horizontal contiguous block on two helical spring pitman tops is fixedly connected a horizontal connecting rod, and the horizontal contiguous block of two helical spring pitman bottoms is fixedly connected a horizontal connecting rod.
Implement in the structure preferred: the radial section of said helical spring pitman is oval.Through the axial length (cross section square) of suitable selection helical spring pitman radial section different directions, can adjust required axial rigidity of different unstability spinal columns and lateral bending rigidity.
Implement in the structure preferred: the outer end of said pedicle screw has the slot of accepting said helical spring pitman, and the two side of this slot is established screw thread and screwed togather the jackscrew of the said helical spring pitman of roof pressure; The periphery of said pedicle screw outer end is provided with a plurality of hole clippings, and these hole clippings are accepted the dop of throw.This pedicle screw is easy in art to cooperate throw to use, and also is easy to fix with the helical spring pitman through jackscrew be connected.
Implement in the structure preferred: the inboard of said horizontal contiguous block has the guide groove that runs through; The lateral part of this horizontal contiguous block is provided with the jack that runs through this guide groove edge and can peg graft said horizontal connecting rod, and this horizontal contiguous block is established screw near the top of this jack and screwed togather the jackscrew of the said horizontal connecting rod of roof pressure.
Implement in the structure preferred: said helical spring pitman is processed with the low beta-titanium alloy that plays of Ti-24Nb-4Zr-7.9Sn.This helical spring pitman elastic modelling quantity is 30Gpa, and rigidity relatively is fit to and intensity is high, help keeping fixed-segment, but fatigue resistance is high, long-term effect is better.
This utility model lumbar vertebral posterior dynamic fixation device, diameter, the helical spring number of turns of two helical spring pitmans of increase do not change the rigidity of fixture in this direction when gaining in strength, and fatigue resistance improves greatly.Two helical spring pitmans are increased horizontal-associates through four horizontal contiguous blocks and two horizontal connecting rods, when keeping unstability rachiocamposis kinematic dexterity, strengthened whole rotational stabilization, preservation spinal mobility at utmost simultaneously.
Description of drawings
Fig. 1 is the perspective view of an embodiment of this utility model lumbar vertebral posterior dynamic fixation device.
Fig. 2 is the perspective view of helical spring pitman among Fig. 1 embodiment.
Fig. 3 is the perspective view of pedicle screw among Fig. 1 embodiment.
Fig. 4 is the perspective view of horizontal contiguous block among Fig. 1 embodiment.
The specific embodiment
One, embodiment one
The stereochemical structure of an embodiment of this utility model lumbar vertebral posterior dynamic fixation device, as shown in Figure 1.This device has two helical spring pitmans 1, and a pedicle screw 2 is established in the upper end of every helical spring pitman 1 and bottom; A horizontal contiguous block 3 is established in the upper and lower of every helical spring pitman 1; The horizontal contiguous block 3 that the horizontal contiguous block 3 on two helical spring pitman 1 tops is fixedly connected 4, two helical spring pitman 1 bottoms of a horizontal connecting rod is fixedly connected a horizontal connecting rod 4.
Please referring to Fig. 3: the major part of the pedicle screw 2 that titanium alloy is processed is the nail bodies 21 that have bone thread; The outer end 22 of pedicle screw 2 is bigger; Have the slot 23 of accepting helical spring pitman 1 on the outer face of outer end 22, the two side of slot 23 is established screw thread and is screwed togather the jackscrew 26 of roof pressure helical spring pitman.The periphery of pedicle screw 2 outer ends 22 is provided with two big hole clippings of setting up relatively 24 and two groups of lesser calorie holes 25 of setting up relatively, and these hole clippings 24,25 are used to accept the dop of throw, so that this pedicle screw 2 locked the pedicle of vertebral arch of lumbar vertebra.
Please referring to Fig. 4: the inboard of the horizontal contiguous block 3 that titanium alloy is processed has the guide groove 32 that runs through; Laterally the lateral part of contiguous block is provided with the jack 33 that runs through guide groove 32 edges and can peg graft horizontal connecting rod 4, and horizontal contiguous block 3 is established screw near the top 31 of jack 33 and screwed togather the jackscrew 34 of the horizontal connecting rod 4 of roof pressure.
During use, with throw two pedicle screws 2 are locked respectively in the left side pedicle of vertebral arch of upper and lower two pleurocentrums of unstability spinal column earlier.The upper straight rod portion 11 of a helical spring pitman 1, following straight-bar portion 13 are put into the slot 23 of upper and lower both sides pedicle screw 2 respectively, and make this helical spring pitman 1 middle spiral spring 12 outside.Be screwed together in screw thread and this helical spring pitman 1 of roof pressure of upper and lower two pedicle screw 2 slots 23 respectively with two jackscrews 26, it be fixedly connected with two pedicle screws 2 be integral.So, in the right side pedicle of vertebral arch of upper and lower two pleurocentrums of unstability spinal column, lock upper and lower two pedicle screws 2 respectively, and with two other jackscrew 26 two pedicle screws 2 of another root helical spring pitman 1 and this are fixedly connected and are integral.Make the guide groove 32 of two horizontal contiguous blocks 3 relative, pass the jack 33 of these two horizontal contiguous blocks 3 with a horizontal connecting rod 4.With the horizontal guide groove 32 of the contiguous block 3 upper straight rod portion 11 of entangling unstability left of spine helical spring pitman 1 in left side wherein; The guide groove 32 of the horizontal contiguous block 3 in right side entangles the upper straight rod portion 11 of unstability spinal column right side helical spring pitman 1; Make two jackscrews 34 this horizontal connecting rod 4 of roof pressure respectively, it is fixedly connected with two helical spring pitmans 1 is integral.So, at unstability spinal column downside two other horizontal contiguous block 3 and another horizontal connecting rod 4 is set.Two helical spring pitmans 1 form the stable horizontal-associate of square shape through two horizontal connecting rods 4.
The above is merely this utility model preferred embodiment, does not limit the scope that this utility model is implemented with this, and the equivalence of doing according to the technical scheme and the description of this utility model changes and modification, all should belong to the scope that this utility model is contained.
Claims (5)
1. a lumbar vertebral posterior dynamic fixation device has two helical spring pitmans, and a pedicle screw is established in the upper end of every helical spring pitman and bottom; It is characterized in that: the helical spring at every helical spring pitman middle part has two circles at least; A horizontal contiguous block is established in the upper and lower of every helical spring pitman; The horizontal contiguous block on two helical spring pitman tops is fixedly connected a horizontal connecting rod, and the horizontal contiguous block of two helical spring pitman bottoms is fixedly connected a horizontal connecting rod.
2. a kind of lumbar vertebral posterior dynamic fixation device according to claim 1 is characterized in that: the radial section of said helical spring pitman is for oval.
3. a kind of lumbar vertebral posterior dynamic fixation device according to claim 1; It is characterized in that: the outer end of said pedicle screw has the slot of accepting said helical spring pitman, and the two side of this slot is established screw thread and screwed togather the jackscrew of the said helical spring pitman of roof pressure; The periphery of said pedicle screw outer end is provided with a plurality of hole clippings, and these hole clippings are accepted the dop of throw.
4. according to claim 1 or 2 or 3 described a kind of lumbar vertebral posterior dynamic fixation devices; It is characterized in that: the inboard of said horizontal contiguous block has the guide groove that runs through; The lateral part of this horizontal contiguous block is provided with the jack that runs through this guide groove edge and can peg graft said horizontal connecting rod, and this horizontal contiguous block is established screw near the top of this jack and screwed togather the jackscrew of the said horizontal connecting rod of roof pressure.
5. according to claim 1 or 2 or 3 described a kind of lumbar vertebral posterior dynamic fixation devices, it is characterized in that: said helical spring pitman is processed with the low beta-titanium alloy that plays of Ti-24Nb-4Zr-7.9Sn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200237653U CN202458646U (en) | 2012-01-18 | 2012-01-18 | Posterior lumbar dynamic fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200237653U CN202458646U (en) | 2012-01-18 | 2012-01-18 | Posterior lumbar dynamic fixing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202458646U true CN202458646U (en) | 2012-10-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200237653U Expired - Fee Related CN202458646U (en) | 2012-01-18 | 2012-01-18 | Posterior lumbar dynamic fixing device |
Country Status (1)
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| CN (1) | CN202458646U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104546094A (en) * | 2015-01-26 | 2015-04-29 | 杨春 | Extending tension type non-fusion fixation system |
| CN104546093A (en) * | 2015-01-26 | 2015-04-29 | 杨春 | Stretch type three-vertebra double-gap posterior non-fusion fixation system |
| CN104644253A (en) * | 2013-11-20 | 2015-05-27 | 杨春 | Tension type lumbar vertebra posterior-path no-fusion fixing system |
| CN104799927A (en) * | 2015-05-11 | 2015-07-29 | 北京贝思达生物技术有限公司 | Spinal internal fixation screw-rod device |
| CN105326545A (en) * | 2014-08-11 | 2016-02-17 | 天津康立尔生物科技有限公司 | Immobilized pedicle screw |
| CN106264699A (en) * | 2016-08-28 | 2017-01-04 | 李海洋 | Pedicle screw |
| CN106923896A (en) * | 2015-12-29 | 2017-07-07 | 徐丽明 | A kind of medical pedicle screw of new specialty |
| US9895174B2 (en) | 2014-03-18 | 2018-02-20 | Empire Technology Development Llc | Orthopedic stiffening device |
-
2012
- 2012-01-18 CN CN2012200237653U patent/CN202458646U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104644253A (en) * | 2013-11-20 | 2015-05-27 | 杨春 | Tension type lumbar vertebra posterior-path no-fusion fixing system |
| US9895174B2 (en) | 2014-03-18 | 2018-02-20 | Empire Technology Development Llc | Orthopedic stiffening device |
| CN105326545A (en) * | 2014-08-11 | 2016-02-17 | 天津康立尔生物科技有限公司 | Immobilized pedicle screw |
| CN104546094A (en) * | 2015-01-26 | 2015-04-29 | 杨春 | Extending tension type non-fusion fixation system |
| CN104546093A (en) * | 2015-01-26 | 2015-04-29 | 杨春 | Stretch type three-vertebra double-gap posterior non-fusion fixation system |
| CN104799927A (en) * | 2015-05-11 | 2015-07-29 | 北京贝思达生物技术有限公司 | Spinal internal fixation screw-rod device |
| CN106923896A (en) * | 2015-12-29 | 2017-07-07 | 徐丽明 | A kind of medical pedicle screw of new specialty |
| CN106264699A (en) * | 2016-08-28 | 2017-01-04 | 李海洋 | Pedicle 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: 20121003 Termination date: 20180118 |
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| CF01 | Termination of patent right due to non-payment of annual fee |