CN202490017U - Posterior cervical unilateral-open-door lateral-mass spinous-process steel plate - Google Patents
Posterior cervical unilateral-open-door lateral-mass spinous-process steel plate Download PDFInfo
- Publication number
- CN202490017U CN202490017U CN 201220008577 CN201220008577U CN202490017U CN 202490017 U CN202490017 U CN 202490017U CN 201220008577 CN201220008577 CN 201220008577 CN 201220008577 U CN201220008577 U CN 201220008577U CN 202490017 U CN202490017 U CN 202490017U
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- China
- Prior art keywords
- fixed part
- spinous process
- steel plate
- connecting portion
- screw
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
- A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/70—Spinal positioners or stabilisers ; Bone stabilisers comprising fluid filler in an implant
- A61B17/7071—Implants for expanding or repairing the vertebral arch or wedged between laminae or pedicles; Tools therefor
Abstract
Provided is a posterior cervical unilateral-open-door lateral-mass spinous-process steel plate, which has a stretched Z shape. The steel plate comprises a first fixed part, a second fixed part and a connection part which connects the first and second fixed parts. An obtuse angle is formed between the first fixed part and the connection part, and an obtuse angle is also formed between the second fixed part and the connection part. The steel plate is characterized in that the first fixed part comprises a first fixed part body arranged to the outer wall of a vertebral plate, and a spinous process fixing part matched with the outer wall of a spinous process; and the spinous process fixing part is formed by upwardly bending the end of the first fixed part body and is provided with a first through hole for a spinous process screw to penetrate. Compared with the prior art, the utility model has the beneficial effects that as the thickness of the spinous process is much larger than that of the vertebral plate, the fixing effect of the spinous process screw is better than the stability achieved by vertical arrangement of a screw on a vertebral plate from the perspective of biomechanics; in addition, the top of the spinous process screw can be directly seen, guaranteeing that the screw does not touch a vertebral canal or damage cervical cord, enhancing the surgical safety.
Description
Technical field
This utility model relates to a kind of posterior cervical fixation steel plate.
Background technology
Various clinically at present such as spinal canal stenosis, prolapse of cervical intervertebral disc, various cervical spondylosis such as neck marrow damage often need the decompression of the way of escape.Conventional decompression operation method is the row laminectomy for decompression, with rongeur spinous process and vertebral plate is stung and is removed, and exposes the canalis spinalis of corresponding sections.Carry out internal fixation with the posterior plate immobilization material.Yet this modus operandi makes patient's cervical vertebra movable function lose, and postoperative usually causes intractable pain, and limitation of activity influences operative effect.If the not all right steel plate in vertebral plate decompression back is fixed, then possibly form postoperative cervical spinal instability and kyphosis deformity again.
In recent years, developed in posterior cervical " single open-door " operation as a kind of alternative of laminectomy, not only can be used to treat cervical spondylotic myelopathy, and can prevent cervical spinal instability and kyphosis deformity behind the laminectomy.Operation method is to grind vertical shape bone groove at " side of opening the door " (crack between a door and its frame) vertebral plate and the lateral mass place of associating, makes " V " shape fluting at the corresponding position of " side of opening the door " offside (" hinge side "), keeps the spongy bone and the internal layer cortical bone of 1.0mm thickness.After the hinge side fluting is ready to, cut off open the door the district ligamenta flava and the overlapped part of vertebral plate at two ends up and down, separate cyst wall soft tissue and vein.Open each sections vertebral plate successively.The benefit that posterior cervical " single open-door " operation is merged than way of escape internal fixation is to keep the activity of cervical vertebra, is particularly useful for the operation of long segment.
But " single open-door " operation back " side of opening the door " vertebral plate is closed easily, causes " closing the door " again, causes the clinical symptoms of spinal canal stenosis again.What prevents that vertebral plate from " closing the door " again causes that the canalis spinalis restenosis becomes the focus of research.But in the present spinal column way of escape, still do not have special-purpose being applicable to and keep cervical vertebra vertebral plate opening position, prevent the immobilization material and the device of closing the door again.Use always clinically and fix with colligations such as steel wire or silk threads, very unreliable after fixing, influence operation back effect, or postoperative complication appears.
For this reason; Occur some in the prior art and be specifically designed to the device that posterior cervical opens the door and performs the operation; See that the patent No. is the Chinese utility model patent " new spinal posterior approach lamina reduction fixed part " (Granted publication number for CN201617932U) of ZL201020135415.7, this fixed part is made up of brace and two special screws in a TBE (threaded both ends) hole; All adopting titanium alloy is material; Brace can be moulding in operation.Brace one end is screwed at the vertebral plate stump of not taking away, and the other end is screwed on the vertebral plate that has just resetted, and cracks and locate to fix respectively in the left and right sides of vertebral plate.
Again can referenced patent number be the Chinese utility model patent of ZL200620125952.7 " cervical vertebra open the door fixing head " (Granted publication number be CN201022741Y); This fixing head is processed by a narrow long steel plate; Have vertebral plate fixing head, lateral mass fixing head, connecting plate; Connecting plate connects vertebral plate fixing head and lateral mass fixing head, and at least two screw fixed holes are set on vertebral plate fixing head and the lateral mass fixing head.Vertebral plate fixing head, lateral mass fixing head and connecting plate are stretched Z-shaped.The clamp that further also has an engaging vertebral plate.This fixing head is compared with the disclosed fixing head of ZL201020135415.7; Postoperative stability improves greatly, but has insufficient place slightly, at first; Because cervical vertebra vertebral plate thickness is generally about 3～4mm; Therefore vertebral plate fixedly the time screw not only shorter, fixing insecure, and possibly break through vertebral plate veutro cortex and get into canalis spinalis infringement neck marrow; There is individual variation in each patient of vertebral plate opening part; Like the difference of vertebral plate thickness, the length of vertebral plate opening angle and remaining vertebral plate etc., and the fixing head of unified specification all is unique on the clamping position of setting angle and clamp; Changeless; There is certain difficulty in fine setting, thereby the stability of whole postoperative also is not best, can further improve.
The utility model content
This utility model technical problem to be solved is that a kind of fixation steel plate that in the operation of posterior cervical single open-door, is used to connect lateral mass and spinous process is provided to the above-mentioned state of the art.Change the vertebral plate hold-down screw of existing 3～4mm length into spinous process screw; Regular length can reach 12mm, because spinous process thickness substantially exceeds the thickness of vertebral plate, makes the spinous process screw fixed effect be better than the stability of on vertebral plate, vertically putting nail on the biomechanics; And owing to can look at the nail point of spinous process screw in the art straight; The assurance screw is not invaded canalis spinalis, and damage neck marrow has improved operation safety.
This utility model to solve another technical problem: the clamp of the support vertebral plate of posterior cervical single open-door lateral mass spinous process steel plate can be made corresponding adjustment according to the difference of the actual vertebral plate thickness of patient and the length of remaining vertebral plate.
This utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of posterior cervical single open-door lateral mass spinous process steel plate; This steel plate is tensile Z type; Comprise first fixed part, second fixed part and connect the connecting portion of aforementioned first fixed part and second fixed part; Aforesaid first fixed part becomes an obtuse angle with connecting portion; Aforesaid second fixed part also becomes an obtuse angle with connecting portion, it is characterized in that described first fixed part comprise the body that places the vertebral plate outer wall and with the suitable spinous process fixed part of spinous process outer wall, aforesaid spinous process fixed part by the end of body upwards bending form and have first through hole that supplies spinous process screw to pass through.
Described connecting portion one side is provided with a clamp, forms one between this clamp and the aforesaid body and supplies the bayonet socket of remaining vertebral plate clamping.During installation, body and remaining vertebral plate outer wall interlock, and clamp is held the inwall of remaining vertebral plate, and the head of remaining vertebral plate then is arranged in the bayonet socket, and the setting of clamp makes whole skeleton more firm.
For making clamp can adapt to the difference between the Different Individual, guarantee safety to greatest extent and steadiness, described clamp can be arranged on the connecting portion along the connecting portion length direction movably.
Described connecting portion be provided with one when supplying dilator to strut clamp as a board of fulcrum, this support plate portion is positioned at the clamp below and near second fixed part.For clamp accurately is provided with fast; Can adopt dilator, dilator first struts portion and second portion of strutting forms by what two centres were rotationally connected each other, when clamp is regulated; First strut portion front end be positioned on the clamp; Second strut portion front end be positioned on the board, through control first strut portion front end and second strut the distance of the front end of portion, just can optimum state be transferred in the clamp position.
The preferred following design of the adjustment structure of clamp: described connecting portion alongst forms a bar hole; Accordingly; The end of described clamp has the noses that can in bar hole, move around; Have screw in these noses, an adjustment screw passes aforesaid bar hole and this screw connects as one.Noses adapt to the bar hole inwall, and can not rotate, and are preferably square.
Described connecting portion alongst forms a bar hole, and a plant bone mass is arranged on the connecting portion and along this bar hole and can moves.
The adjusting of plant bone mass is provided with preferred following structure: described plant bone mass end face has a screw hole, and an adjustment screw passes described bar hole and this screw hole connects as one.
Further, form second through hole that a confession lateral mass screw passes through on described second fixed part.
Further, the duct of said first fixing hole and second fixing hole can be designed to bell mouth shape, the fine setting when being convenient to screw and inserting on the angle.
Compared with prior art, the advantage of this utility model is: because spinous process thickness substantially exceeds the thickness of vertebral plate, it is darker to make that spinous process screw is beaten, thereby fixing more firm, and is difficult for invading the neck marrow, guarantees the safety of postoperative.In addition, the clamp of the support vertebral plate of posterior cervical single open-door lateral mass spinous process steel plate can be made accurate adjustment according to the difference of the actual vertebral plate thickness of patient and the length of remaining vertebral plate.Has the important use meaning clinically.
Description of drawings
Fig. 1 is embodiment 1 structural representation.
Fig. 2 is embodiment 1 exploded.
Fig. 3 is that embodiment 1 installs the back state diagram.
Fig. 4 is the enlarged drawing of A portion among Fig. 3.
Fig. 5 is state diagram during the clamp position adjustments among the embodiment 1.
Fig. 6 is embodiment 2 structural representations.
Fig. 7 is embodiment 3 structural representations.
Fig. 8 is embodiment 4 structural representations.
The specific embodiment
Embodiment describes in further detail this utility model below in conjunction with accompanying drawing.
Connecting portion 3 one sides are provided with one along the mobile clamp 5 of connecting portion length direction, form one between this clamp 5 and first fixed part 11 and supply the bayonet socket 53 of remaining vertebral plate clamping.Connecting portion 3 be provided with one when supplying dilator to strut clamp as a board 7 of fulcrum, a board 7 is positioned at clamp 5 belows and near second fixed part 2.
The adjustable structure of clamp is provided with as follows: connecting portion 3 alongst forms a bar hole 31; Accordingly; The end of clamp 5 has the noses 51 that can in bar hole 31, move around; Have screw 52 in these noses 51, adjustment screw 6 is passed bar hole 31 and is connected as one with screw 52.Noses 51 are square bar hole 31 inwalls that adapt to, and can not rotate.
Like Fig. 3 and shown in Figure 4; Posterior cervical single open-door lateral mass spinous process steel plate in the present embodiment is arranged on the state behind one of them cervical vertebra 10; Spinous process fixed part 4 is positioned at spinous process 100 outer walls and fixing through spinous process screw 81, and second fixed part 2 is positioned on the lateral mass 102 also fixing through lateral mass screw 82.Body 11 interlocks with remaining vertebral plate 101 outer walls, and clamp 5 is held the inwall of remaining vertebral plate 101, and the head of remaining vertebral plate 101 then is arranged in the bayonet socket 53.
In conjunction with shown in Figure 5; Dilator 103 first is strutted portion 104 and second and struts portion 105 and form by what two centres were rotationally connected each other; During clamp 5 position adjustments, first strut portion 104 front end be positioned on the clamp 5, second strut portion 105 front end be positioned on the board 7; Through control first strut portion 104 front end and second strut the distance of the front end of portion 105, just can optimum state be transferred in clamp 5 positions.With adjustment screw 6 clamp 5 is fixed after being transferred to suitable position, taken out dilator 103 and get final product.
Claims (9)
1. posterior cervical single open-door lateral mass spinous process steel plate; This steel plate is tensile Z type; Comprise first fixed part, second fixed part and connect the connecting portion of aforementioned first fixed part and second fixed part; Aforesaid first fixed part becomes an obtuse angle with connecting portion; Aforesaid second fixed part also becomes an obtuse angle with connecting portion, it is characterized in that described first fixed part comprise the body that places the vertebral plate outer wall and with the suitable spinous process fixed part of spinous process outer wall, aforesaid spinous process fixed part by the end of body upwards bending form and have first through hole that supplies spinous process screw to pass through.
2. posterior cervical single open-door lateral mass spinous process steel plate according to claim 1 is characterized in that described connecting portion one side is provided with a clamp, forms one between this clamp and aforesaid first fixed part and supplies the bayonet socket of remaining vertebral plate clamping.
3. posterior cervical single open-door lateral mass spinous process steel plate according to claim 2 is characterized in that described clamp can be arranged on the connecting portion along the connecting portion length direction movably.
4. posterior cervical single open-door lateral mass spinous process steel plate according to claim 3, it is characterized in that described connecting portion be provided with one when supplying dilator to strut clamp as a board of fulcrum, this support plate portion is positioned at the clamp below and near second fixed part.
5. posterior cervical single open-door lateral mass spinous process steel plate according to claim 3; It is characterized in that described connecting portion alongst forms a bar hole; Accordingly; The end of described clamp has the noses that can in bar hole, move around, and has screw in these noses, and an adjustment screw passes aforesaid bar hole and this screw connects as one.
6. posterior cervical single open-door lateral mass spinous process steel plate according to claim 1 is characterized in that described connecting portion alongst forms a bar hole, and a plant bone mass is arranged on the connecting portion and along this bar hole and can moves.
7. posterior cervical single open-door lateral mass spinous process steel plate according to claim 6 is characterized in that described plant bone mass end face has a screw hole, and an adjustment screw passes described bar hole and this screw hole connects as one.
8. according to the described posterior cervical single open-door of arbitrary claim lateral mass spinous process steel plate in the claim 1～7, it is characterized in that forming on described second fixed part second through hole that a confession lateral mass screw passes through.
9. posterior cervical single open-door lateral mass spinous process steel plate according to claim 8, the duct that it is characterized in that said first fixing hole and second fixing hole is a bell mouth shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220008577 CN202490017U (en) | 2012-01-10 | 2012-01-10 | Posterior cervical unilateral-open-door lateral-mass spinous-process steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220008577 CN202490017U (en) | 2012-01-10 | 2012-01-10 | Posterior cervical unilateral-open-door lateral-mass spinous-process steel plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202490017U true CN202490017U (en) | 2012-10-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220008577 Expired - Fee Related CN202490017U (en) | 2012-01-10 | 2012-01-10 | Posterior cervical unilateral-open-door lateral-mass spinous-process steel plate |
Country Status (1)
| Country | Link |
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| CN (1) | CN202490017U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102551868A (en) * | 2012-01-10 | 2012-07-11 | 刘观燚 | Posterior cervical spine single open door side block spinous process steel plate |
| CN105266877A (en) * | 2015-11-26 | 2016-01-27 | 广州聚生生物科技有限公司 | Spinal column vertebral plate open-door fixing system |
| CN109009386A (en) * | 2018-09-17 | 2018-12-18 | 北京市富乐科技开发有限公司 | Posterior cervical plate |
-
2012
- 2012-01-10 CN CN 201220008577 patent/CN202490017U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102551868A (en) * | 2012-01-10 | 2012-07-11 | 刘观燚 | Posterior cervical spine single open door side block spinous process steel plate |
| CN105266877A (en) * | 2015-11-26 | 2016-01-27 | 广州聚生生物科技有限公司 | Spinal column vertebral plate open-door fixing system |
| CN109009386A (en) * | 2018-09-17 | 2018-12-18 | 北京市富乐科技开发有限公司 | Posterior cervical plate |
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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: 20121017 Termination date: 20130110 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |