CN101411642A - System for fixing anterior cervical and capable of preventing overcompensation movement - Google Patents
System for fixing anterior cervical and capable of preventing overcompensation movement Download PDFInfo
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- CN101411642A CN101411642A CNA2008100798209A CN200810079820A CN101411642A CN 101411642 A CN101411642 A CN 101411642A CN A2008100798209 A CNA2008100798209 A CN A2008100798209A CN 200810079820 A CN200810079820 A CN 200810079820A CN 101411642 A CN101411642 A CN 101411642A
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Abstract
The invention relates to an anterior cervical fixing system capable of preventing overcompensation motion, which belongs to the technical field of surgical instrument. The anterior cervical fixing system adopts the technical proposal that the anterior cervical fixing system comprises a fused vertebra fixing plate used for fixing two or a plurality of vertebra bodies, an adjacent vertebra fixing plate used for fixing adjacent vertebra bodies, and a limit ligament which connects the fused vertebra fixing plate and the adjacent vertebra fixing plate, so as to limit the spacing distance between the fused vertebra fixing plate and the adjacent vertebra fixing plate. The anterior cervical fixing system can support the vertebral body of a surgical section, can realize fusion of decompression sections and simultaneously change the stress concentration phenomenon of adjacent sections of the decompression sections and prevent or relieve degeneration of intervertebral discs of the adjacent sections, has a simple structure, and is convenient to operate when being used for surgeries.
Description
Technical field
The present invention relates to a kind of orthopedic medical device, be specifically related to a kind of fixture, belong to technical field of surgical instrument anterior cervical operation.
Background technology
Anterior cervical decompression bone graft fusion ACDF (Anterior Cervical Discectomy and Fusion) is the standard procedures method for the treatment of cervical spondylotic myelopathy and cervical spondylotic radiculopathy at present clinically.Through the observation on Clinical Application in surplus 50 years, though this operation method nerve decompression effect is obvious, fusion rate height between vertebral body.But, there is its inherent defective in ACDF art formula itself: after the lesion segment decompression is merged, though realized removing the purpose of nerve compression, also kept the stable and height of sections, but the motor function between the sections has been lost, the motor function of this part forfeiture must be by the compensatory flexion movement function with the performance cervical vertebra of the hyperkinesia of its adjacent segment, this will cause the adjacent segment stress concentration and further aggravate the regression of adjacent segment intervertebral disc, causes the sick ASD (Adjacent Segment Disease) of adjacent segment behind the anterior cervical vertebrae fusion.ACDF postoperative ASD has very high incidence rate, has considerable patient to need operative treatment once more because of ASD.Therefore, spinal surgery is clinical to press for so a kind of device at present, and it can change the stress concentration phenomenon of its adjacent segment when realizing that the decompression sections merges, prevent or slow down the generation of adjacent segment regression.
Summary of the invention
Technical problem to be solved by this invention provides a kind of anterior cervical fixation device, behind this device implant surgery position, can play a supporting role to the vertebral body that needs merge sections, again can be under the situation that keeps the adjacent segment motor function hyperkinesia and the stress concentration of restriction adjacent segment.
For addressing the above problem, the present invention adopts following technical scheme:
A kind of anterior cervical fixation system that prevents the overcompensation campaign, comprise the fusion vertebra fixing head that is used for fixing two or more vertebral bodys, the adjacent vertebra fixing head that is used for fixing adjacent vertebral bodies in the formation, and between fusion vertebra fixing head and adjacent vertebra fixing head, connect to limit the spacing ligament that both space.
The above-mentioned anterior cervical fixation system that prevents the overcompensation campaign, described fusion vertebra fixing head two ends are provided with snap ring, and spacing ligament is connected on the snap ring; On the described adjacent vertebra fixing head lockable mechanism is set, it is fixing that lockable mechanism is regulated the back with spacing ligament.
The above-mentioned anterior cervical fixation system that prevents the overcompensation campaign, described lockable mechanism is draw-in groove and lock banking stop, and described draw-in groove is arranged on adjacent vertebra fixing head one side, and lock banking stop is installed in the draw-in groove.
The above-mentioned anterior cervical fixation system that prevents the overcompensation campaign, described lockable mechanism is a hold-down screw.
The above-mentioned anterior cervical fixation system that prevents the overcompensation campaign, described spacing ligament adopts polyester belt.
The present invention is applicable to the fixing of two or more vertebral bodys, and merging the vertebra fixing head can fix by hold-down screw on it and pathological changes vertebral body, and the adjacent vertebra fixing head at its two ends then can fix with two adjacent vertebral bodys up and down; Simultaneously since merge be equipped with between vertebra fixing head and the adjacent vertebra fixing head can relative motion the spacing ligament of polyester, so just make that flexion and extension, axially-movable between the last hypocentrum that the pathological changes vertebral body is adjacent are still kept, but prevent hyperkinesia because of the restriction of spacing ligament, thereby reduce the compensatory activity of contiguous vertebral body, help preventing the acceleration regression of adjacent vertebral bodies.According to the difference of pathological changes vertebral body quantity, the cone quantity of middle steel plate cross-over connection can be two, three or four.
Spacing ligament among the present invention adopts polyester belt, and polyester material has high tensile strength and histocompatibility, the ligament made from polyester material can bear repeatedly high strength stress and the indefatigability fracture; The vertebral body fixing head adopts the inboard easy applying curved design that is consistent with cervical curvature, guarantees that fully the fixed-segment plant bone mass merges required stability requirement, helps bone-graft fusion.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the A-A generalized section of Fig. 1;
Fig. 3 is a connection diagram of the present invention;
Fig. 4 is a user mode reference diagram of the present invention.
Each label is expressed as follows among the figure: merge the vertebra fixing head 1.; 2. adjacent vertebra fixing head; 3. spacing ligament; 4. snap ring; 5. draw-in groove; 6. hold-down screw; 7. lock banking stop.
The specific embodiment
Shown in accompanying drawing 1,2, the present invention is merged vertebra fixing head 1, adjacent vertebra fixing head 2 and spacing ligament 3 by comprising in constituting, and the two ends of described fusion vertebra fixing head are bored fixing head by spacing ligament with the neighbour and linked to each other.Merge vertebra fixing head two ends and snap ring 4 is set, fixedly connected spacing ligament 3 on the snap ring; On the described adjacent vertebra fixing head lockable mechanism is set.Described lockable mechanism comprises draw-in groove 5 and lock banking stop 7, and described draw-in groove is arranged on adjacent vertebra fixing head one side, and lock banking stop can be installed in the draw-in groove.During use, lockable mechanism is connected with spacing ligament on the snap ring.Described lock banking stop cross section forms Z type bend, can well tighten spacing ligament, is difficult for getting loose.For spacing ligament is definitely locked, the lockable mechanism that described adjacent vertebra is decided on the plate can be hold-down screw.Be respectively equipped with fixing screw hole on above-mentioned fusion vertebra fixing head and the adjacent vertebra fixing head, can fixing head be fixed on the vertebral body by hold-down screw.
As shown in Figure 4, using method of the present invention is, behind the anterior cervical decompression bone grafting operation, install in the place ahead of bone-graft fusion sections and to merge the vertebra fixing head and tighten hold-down screw and fix, merge the vertebra fixing head and mainly play stably and merge the effect of sections, for effective fusion of later stage plant bone mass or various Invasive lumbar fusion devices creates conditions, at the two ends up and down of merging the vertebra fixing head, be fixed with the spacing ligament that polyester material is made, mainly bring into play its tension band effect.At fusion sections adjacent segment adjacent vertebra fixing head is installed, on the adjacent vertebra fixing head draw-in groove structure is arranged, the spacing ligament of polyester that merges on the vertebra fixing head is imported by the inlet of introducer from adjacent vertebra fixing head below, enter after turning back in the draw-in groove of adjacent vertebra fixing head, use the spacing ligament of polyester between tension regulator tension fusion vertebra fixing head and adjacent vertebra fixing head, regulate behind the suitable tension force in the draw-in groove that lock banking stop packed into, use approximator to tighten spacing ligament, excise the unnecessary spacing ligament of polyester.
Below its concrete operations are described below:
1) patient gets dorsal position after anaesthetizing successfully, gets the throat otch after the sterilization shop is single, appears the place ahead of pathological changes cervical vertebra sections and adjacent segment vertebral body the place ahead of lesion segment downwards through the sternocleidomastoid inner edge.
2) adopt conventional ACDF method, intervertebral disc, hyperosteogeny even the whole vertebral body of excision lesion segment are decompressed to spinal cord the place ahead.Take from body bone piece or various Invasive lumbar fusion device, titanium net etc. and prune suitable back implantation bony defect place, embedding is real.
3) the fusion vertebra fixing head of selection appropriate length is placed in the place ahead of merging the sections vertebral body, is screwed into four pieces of hold-down screws and fixes.
4) in the adjacent segment that merges sections adjacent vertebra fixing head is installed,, can on the adjacent segment vertebral body above or below the fusion sections, an adjacent vertebra fixing head be installed separately, or two adjacent vertebra fixing heads be installed simultaneously thereon down according to patient's situation.Tighten the fixing adjacent vertebra fixing head of two pieces of hold-down screws.
5) open the spacing ligament of polyester that merges on the vertebra fixing head, introducer is passed in the draw-in groove of adjacent vertebra fixing head, hook the pilot hole on the spacing ligament of polyester, the porch of the spacing ligament of polyester from adjacent vertebra fixing head below imported, go into draw-in groove after turning back.
6) use the spacing ligament of tension regulator tension polyester, it is being kept under the tensile situation that needs, use approximator that lock banking stop is locked in the draw-in groove, excise the unnecessary spacing ligament of polyester.
7) the back layer-by-layer suture that irrigates, operation finishes.
In clinical manipulation,, can't realize satisfied effect of easing stress in most cases though artificial intercalated disc displacement has kept the motor function of sections.Adopt the present invention then can reach the abundant effect of easing stress of ACDF, can intervene and control its intrinsic problem ASD again.If also there is intervertebral disc degeneration in sections above or below the need fusion sections, quicken to cause nervous symptoms in order to prevent its postoperative regression, the clinician is often merged it simultaneously, this way sacrificed one normal relatively at present, the later also further motor function of the sections of regression, this is undoubtedly a kind of extremely unreasonable very helpless again selection.Adopt then effective head it off of cervical vertebra half restricted type anterior plate system; lesion segment is fully being reduced pressure the fixed while of steel plate; adjacent regression takes place but be not enough to also cause that the sections of nervous symptoms adds with adjacent vertebra fixing head for it; like this by the semi-rigid connection between adjacent vertebra fixing head and the fusion vertebra fixing head; will the intervertebral disc " protection " of the adjacent segment of regression takes place; if the regression process of this intervertebral disc stops even reversing; then avoided excessive fusion; if its regression further develops, still can it be merged by second operation.On lumbar vertebra, there is half more strong inner fixing device to be applied to clinical, but cervical vertebra does not have effective spinous process and the pedicle of vertebral arch structure can be for utilizing, and there are vital tissue structures such as esophagus, nerve in the place ahead, therefore is difficult to design half strong inner fixing device complicated, high incisura.The present invention is ingenious to utilize the spacing ligament of polyester will merge the vertebra fixing head and adjacent vertebra fixing head couples together, semirigid internal fixation or elasticity internal fixation have been realized at cervical vertebra, merging the vertebra fixing head provides decompression sections bone-graft fusion needed powerful the support, adjacent vertebra fixing head has then effectively limited the compensatory motion of decompression adjacent segment, and will merge the stress concentration that sections causes and further shift to a distant place, solved the stress interference of ACDF, therefore will effectively control and prevent ACDF postoperative ASD adjacent segment.
Claims (5)
1. anterior cervical fixation system that can prevent the overcompensation campaign, it is characterized in that: comprise the fusion vertebra fixing head (1) that is used for fixing two or more vertebral bodys, the adjacent vertebra fixing head (2) that is used for fixing adjacent vertebral bodies in the formation, and between fusion vertebra fixing head and adjacent vertebra fixing head, connect to limit the spacing ligament (3) that both space.
2. the anterior cervical fixation system that prevents the overcompensation campaign according to claim 1 is characterized in that: described fusion vertebra fixing head two ends are provided with snap ring (4), and spacing ligament (3) is connected on the snap ring; On the described adjacent vertebra fixing head lockable mechanism is set, it is fixing that lockable mechanism is regulated the back with spacing ligament.
3. the anterior cervical fixation system that prevents the overcompensation campaign according to claim 2 is characterized in that: described lockable mechanism is draw-in groove (5) and lock banking stop (7), and described draw-in groove is arranged on adjacent vertebra fixing head one side, and lock banking stop is installed in the draw-in groove.
4. the anterior cervical fixation system that prevents the overcompensation campaign according to claim 2 is characterized in that: described lockable mechanism is a hold-down screw.
5. according to claim 1,2, the 3 or 4 described anterior cervical fixation systems that prevent the overcompensation campaign, it is characterized in that: described spacing ligament adopts polyester belt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100798209A CN101411642B (en) | 2008-11-24 | 2008-11-24 | System for fixing anterior cervical and capable of preventing overcompensation movement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100798209A CN101411642B (en) | 2008-11-24 | 2008-11-24 | System for fixing anterior cervical and capable of preventing overcompensation movement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101411642A true CN101411642A (en) | 2009-04-22 |
| CN101411642B CN101411642B (en) | 2010-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100798209A Expired - Fee Related CN101411642B (en) | 2008-11-24 | 2008-11-24 | System for fixing anterior cervical and capable of preventing overcompensation movement |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104042317A (en) * | 2014-06-16 | 2014-09-17 | 姜永庆 | Spine fixing system |
| CN110811803A (en) * | 2019-10-29 | 2020-02-21 | 四川大学华西医院 | Cervical vertebra anterior oblique transverse fixing steel plate |
| CN111529035A (en) * | 2020-05-28 | 2020-08-14 | 四川大学华西医院 | Anterior cervical adjacent vertebra degeneration prevention buffer device |
-
2008
- 2008-11-24 CN CN2008100798209A patent/CN101411642B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104042317A (en) * | 2014-06-16 | 2014-09-17 | 姜永庆 | Spine fixing system |
| CN110811803A (en) * | 2019-10-29 | 2020-02-21 | 四川大学华西医院 | Cervical vertebra anterior oblique transverse fixing steel plate |
| CN111529035A (en) * | 2020-05-28 | 2020-08-14 | 四川大学华西医院 | Anterior cervical adjacent vertebra degeneration prevention buffer device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101411642B (en) | 2010-09-15 |
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Granted publication date: 20100915 Termination date: 20111124 |