CN201290754Y - Cervical vertebra front-path fixation device with semi-limitation function - Google Patents
Cervical vertebra front-path fixation device with semi-limitation function Download PDFInfo
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- CN201290754Y CN201290754Y CNU2008201066504U CN200820106650U CN201290754Y CN 201290754 Y CN201290754 Y CN 201290754Y CN U2008201066504 U CNU2008201066504 U CN U2008201066504U CN 200820106650 U CN200820106650 U CN 200820106650U CN 201290754 Y CN201290754 Y CN 201290754Y
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- fixing head
- fixation device
- adjacent
- ligament
- vertebra fixing
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Abstract
The utility model provides an anterior cervical fixation device with a semi-constraint function, belonging to the technical field of surgical instruments. The technical scheme is that the anterior cervical fixation device comprises a fixing plate for an cervical vertebra requiring a surgery, a fixing plate for the adjacent vertebra, and a limiting ligament; both ends of the fixing plate for the cervical vertebra requiring the surgery are connected with the fixing plate for the adjacent vertebra by the limiting ligament. While supporting the segmental cervical vertebra requiring the surgery and realizing the fusion of the decompressed segments, the anterior cervical fixation device with the semi-constraint function also changes the stress concentration in the adjacent segments and prevents or slows down the degradation of intervertebral discs of the adjacent segments. Moreover, the anterior cervical fixation device with the semi-constraint function has the advantages of simple structure and easy operation when being used in the surgeries.
Description
Technical field
This utility model relates to a kind of orthopedic medical device, is specifically related to a kind of fixture to anterior cervical operation, belongs to technical field of surgical instrument.
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
The technical problems to be solved in the utility model 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 solving the problems of the technologies described above, this utility model adopts following technical scheme:
A kind of anterior cervical fixation device with half limitation function comprises art vertebra fixing head, adjacent vertebra fixing head and spacing ligament in the formation, the two ends of described art vertebra fixing head are bored fixing head by spacing ligament with the neighbour and linked to each other.
Above-mentioned anterior cervical fixation device with half limitation function, described art 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.
Above-mentioned anterior cervical fixation device with half limitation function, 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.
Above-mentioned anterior cervical fixation device with half limitation function, described lockable mechanism is a hold-down screw.
This utility model is applicable to the fixing of two or more vertebral bodys, art vertebra fixing head can fix by hold-down screw on it and pathological changes vertebral body, the adjacent vertebra fixing head at its two ends then can fix with two adjacent vertebral bodys up and down, the vertebral body of damage is supported and protects; Simultaneously since be equipped with between art 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 in this utility model 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 utility model;
Fig. 2 is the A-A generalized section of Fig. 1;
Fig. 3 is a connection diagram of the present utility model;
Fig. 4 is this utility model user mode reference diagram.
Each label is expressed as follows among the figure: 1. art vertebra fixing head; 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, this utility model is by comprising art vertebra fixing head 1, adjacent vertebra fixing head 2 and spacing ligament 3 in constituting, and the two ends of described art vertebra fixing head are bored fixing head by spacing ligament with the neighbour and linked to each other.Art vertebra fixing head two ends are provided with snap ring 4, 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 art 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, operation method of the present utility model is, behind the anterior cervical decompression bone grafting operation, art vertebra fixing head is installed in the place ahead of bone-graft fusion sections and is tightened hold-down screw and fix, art vertebra fixing head is mainly played stably and is merged 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 art 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 on the art 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 art 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 operation is 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 art 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 on the art 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 cervical vertebra half restricted type anterior plate system 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 art 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 ingenious spacing ligament of polyester that utilizes of this device couples together art vertebra fixing head and adjacent vertebra fixing head, semirigid internal fixation or elasticity internal fixation have been realized at cervical vertebra, art 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.
More than be a kind of splendid embodiment of this utility model, all equalizations of being done according to this utility model claim scope change and modify, all in this utility model protection domain.
Claims (4)
1. anterior cervical fixation device with half limitation function, it is characterized in that: comprise art vertebra fixing head (1), adjacent vertebra fixing head (2) and spacing ligament (3) in the formation, the two ends of described art vertebra fixing head are bored fixing head by spacing ligament with the neighbour and are linked to each other.
2. the anterior cervical fixation device with half limitation function according to claim 1 is characterized in that: described art 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.
3. the anterior cervical fixation device with half limitation function 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 device with half limitation function according to claim 2 is characterized in that: described lockable mechanism is a hold-down screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201066504U CN201290754Y (en) | 2008-11-24 | 2008-11-24 | Cervical vertebra front-path fixation device with semi-limitation function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201066504U CN201290754Y (en) | 2008-11-24 | 2008-11-24 | Cervical vertebra front-path fixation device with semi-limitation function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201290754Y true CN201290754Y (en) | 2009-08-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201066504U Expired - Fee Related CN201290754Y (en) | 2008-11-24 | 2008-11-24 | Cervical vertebra front-path fixation device with semi-limitation function |
Country Status (1)
| Country | Link |
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| CN (1) | CN201290754Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110338895A (en) * | 2019-08-20 | 2019-10-18 | 北京大学第三医院（北京大学第三临床医学院） | Support, fixed, fusing device between a kind of vertebral plate |
-
2008
- 2008-11-24 CN CNU2008201066504U patent/CN201290754Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110338895A (en) * | 2019-08-20 | 2019-10-18 | 北京大学第三医院（北京大学第三临床医学院） | Support, fixed, fusing device between a kind of vertebral plate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090819 Termination date: 20101124 |