CN204520928U - Anterior cervical vertebrae fixed system - Google Patents
Anterior cervical vertebrae fixed system Download PDFInfo
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- CN204520928U CN204520928U CN201420854394.2U CN201420854394U CN204520928U CN 204520928 U CN204520928 U CN 204520928U CN 201420854394 U CN201420854394 U CN 201420854394U CN 204520928 U CN204520928 U CN 204520928U
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- hone lamella
- screw
- screw hole
- cervical vertebrae
- fixed system
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Abstract
The utility model discloses a kind of anterior cervical vertebrae fixed system, this anterior cervical vertebrae fixed system comprises hone lamella (21) and screw (22), (21) are formed with screw hole to hone lamella, in screw hole on screw (22) implantable hone lamella (21), so that hone lamella (21) is connected with vertebral body, retaining ring (23) is embedded with in screw hole on hone lamella (21), screw (22) is implanted after in the screw hole on hone lamella (21), retaining ring (23) contacts with the nut position of screw (22) and expands, so that screw (22) is locked in the screw hole on hone lamella (21).Anterior cervical vertebrae fixed system of the present utility model improves the latch-up structure of screw, and being locked by original pinning changes present screw self-locking structure into, decreases the risk of toner screw, and add locating hole on hone lamella, prevents hone lamella from implanting hour offset.
Description
Technical field
This utility model relates to a kind of anterior cervical vertebrae fixed system, particularly relates to a kind of self-locking anterior cervical vertebrae fixed system.
Background technology
Anterior cervical decompression operation has been widely used in the diseases such as cervical vertebra degenerative lesion, cervical spinal injury, and application after intervertebral disc, Subtotal vertebrectomy in bone grafting internal fixtion is more and more extensive.Anterior cervical decompression and fusion merge spinal cord injury etc. in treatment cervical spondylosis and fracture-dislocation of cervical spine and have obvious superiority, its curative effect is ideal, this operative therapy directly can be removed and cause laminate from spinal cord canalis spinalis front, in many cases, spinal cord and the neural damage suffered are not in a level, its scope is two and multiple segments of spinal cord, treatment should be excised allly cause laminate, just can reach pressurization object.
When anterior cervical vertebrae simple bone graft merges, because On graft area lacks reliable stabilizing measures, easily occur that plant bone mass comes off, bone grafting disunion or delayed union or pseudoarticulation formation.The pseudarthrosis incidence rate of data display anterior cervical decompression bone-graft fusion is up to 26%, and the pseudarthrosis incidence rate of the bone-graft fusion of multi-segmental is higher, becomes a puzzlement clinicist's difficult problem.The appearance of anterior plate fixation, be not only clinical and provide good fixing means, a stable support is provided for Cervical anterior fusion, shortens plant bone mass time of fusion, improves fusion rate, Delayed onset cervical kyphosis can also be prevented and keep cervical vertebrae height.
As depicted in figs. 1 and 2, anterior cervical vertebrae fixed system of the prior art comprises hone lamella 11, screw 12, pinning 13 and locking plate 14.Wherein, pinning 13 is a kind of short screws, is tightened on hone lamella 11, and compress locking plate 14, locking plate 14 is fixed two screws 12 again, prevents from coming off.Thus, in prior art, two screws are only fixed by a pinning, but pinning also has the risk of loose or dislocation, pinning to be fixed effect unsatisfactory, in the actual use procedure of steel plate system, pinning has the case come off, and illustrates that this locking mechanism is so not desirable.
Utility model content
The purpose of this utility model is to provide the anterior cervical vertebrae fixed system that a kind of structure is simple, locking effect is good.
For achieving the above object, the concrete technical scheme of anterior cervical vertebrae fixed system of the present utility model is as follows:
A kind of anterior cervical vertebrae fixed system, comprise hone lamella and screw, hone lamella is formed with screw hole, in screw hole on the implantable hone lamella of screw, to be connected with vertebral body by hone lamella, in the screw hole on hone lamella, be embedded with retaining ring, after in the screw hole on screw placement hone lamella, retaining ring contacts with the nut position of screw and expands, with by the screw hole of screw lock on hone lamella.
Anterior cervical vertebrae fixed system of the present utility model improves the latch-up structure of screw, and being locked by original pinning changes present screw self-locking structure into, decreases the risk of toner screw, and add locating hole on hone lamella, prevents hone lamella from implanting hour offset.
Accompanying drawing explanation
Fig. 1 is the front view of existing anterior cervical vertebrae fixed system;
Fig. 2 is the top view of existing anterior cervical vertebrae fixed system;
Fig. 3 is the front view of anterior cervical vertebrae fixed system of the present utility model;
Fig. 4 is the top view of anterior cervical vertebrae fixed system of the present utility model.
Detailed description of the invention
In order to better understand the purpose of this utility model, structure and function, below in conjunction with accompanying drawing, further detailed description is done to a kind of anterior cervical vertebrae fixed system of the present utility model.
As shown in Figure 3 and Figure 4, anterior cervical vertebrae fixed system of the present utility model comprises hone lamella 21, screw 22 and retaining ring 23.Wherein, hone lamella 21 can be made up of titanium alloy material, such as, adopt and the good Ti6Al4V alloy material of human internal environment's compatibility, to reduce the stimulation of titanium plate to soft tissue.In addition, hone lamella 21 is formed with multiple columniform screw hole, for pedicle screw 22, multiple screw hole is preferably arranged on the two ends of hone lamella 21, and symmetrically.It should be noted, in the present embodiment, hone lamella 21 is preferably arc, and be 150mm-170mm (being preferably 160mm) along the radius of curvature of sagittal plane (a-a cross section), radius of curvature along cross section (b-b cross section) is 20mm-40mm (being preferably 30mm), to match with the dissect physiology form of patient.
Further, retaining ring 23 is embedded in the screw hole on hone lamella 21, can be made up, such as medical expandable sponges of medical expanding material.Thus, in the screw hole on hone lamella 21 after pedicle screw 22, retaining ring 23 can contact with the nut position of screw 22 and expand, and to be locked in the screw hole on hone lamella 21 by screw 22, thus realizes self-locking.
Further, hone lamella 21 is also formed with locating hole 24, locating hole 24 can be arranged between the screw hole of hone lamella 21 end, is preferably the centre position between symmetrically arranged screw hole, for being located by hone lamella 21 temporarily, to prevent from implanting skew.Such as, during operation, after the implantation position determining hone lamella 21, positioning needle can be squeezed in locating hole 24 first on hone lamella 21, and then pedicle screw 22 in screw hole on hone lamella 21, after having performed the operation, positioning needle can be pulled out from the locating hole 24 hone lamella 21.In addition, the middle part of hone lamella 21 also can be formed merges window 25, and by merging window 25, operator clearly can look at terminal plate of vertebral body straight, is convenient to the position confirming plant bone mass and hone lamella.
By specific embodiment, this utility model is further described above; but it should be understood that; here concrete description; should not be construed as the restriction to essence of the present utility model and scope; one of ordinary skilled in the art to the various amendments that above-described embodiment is made, belongs to the scope that this utility model is protected after reading this specification.
Claims (5)
1. an anterior cervical vertebrae fixed system, comprise hone lamella (21) and screw (22), (21) are formed with screw hole to hone lamella, in screw hole on screw (22) implantable hone lamella (21), so that hone lamella (21) is connected with vertebral body, it is characterized in that, retaining ring (23) is embedded with in screw hole on hone lamella (21), screw (22) is implanted after in the screw hole on hone lamella (21), retaining ring (23) contacts with the nut position of screw (22) and expands, so that screw (22) is locked in the screw hole on hone lamella (21).
2. anterior cervical vertebrae fixed system according to claim 1, is characterized in that, (21) are formed with multiple screw hole to hone lamella, and multiple screw hole is arranged on the two ends of hone lamella (21), and symmetrically.
3. anterior cervical vertebrae fixed system according to claim 2, it is characterized in that, hone lamella (21) is formed with the locating hole (24) for being located by hone lamella (21) temporarily, locating hole (24) is arranged between the screw hole of hone lamella (21) end.
4. anterior cervical vertebrae fixed system according to claim 1, is characterized in that, the middle part of hone lamella (21) is formed with the fusion window (25) being convenient to the position confirming plant bone mass and hone lamella.
5. anterior cervical vertebrae fixed system according to claim 1, is characterized in that, hone lamella (21) is arc, and parasagittal radius of curvature is 150mm-170mm, and the radius of curvature along cross section is 20mm-40mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420854394.2U CN204520928U (en) | 2014-12-29 | 2014-12-29 | Anterior cervical vertebrae fixed system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420854394.2U CN204520928U (en) | 2014-12-29 | 2014-12-29 | Anterior cervical vertebrae fixed system |
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| Publication Number | Publication Date |
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| CN204520928U true CN204520928U (en) | 2015-08-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420854394.2U Active CN204520928U (en) | 2014-12-29 | 2014-12-29 | Anterior cervical vertebrae fixed system |
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| CN (1) | CN204520928U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104434286A (en) * | 2014-12-29 | 2015-03-25 | 北京市春立正达医疗器械股份有限公司 | Anterior cervical fixing system |
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2014
- 2014-12-29 CN CN201420854394.2U patent/CN204520928U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104434286A (en) * | 2014-12-29 | 2015-03-25 | 北京市春立正达医疗器械股份有限公司 | Anterior cervical fixing system |
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| GR01 | Patent grant |