CN202490016U - Axis spinous processes screw steel plate - Google Patents
Axis spinous processes screw steel plate Download PDFInfo
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- CN202490016U CN202490016U CN2011205098737U CN201120509873U CN202490016U CN 202490016 U CN202490016 U CN 202490016U CN 2011205098737 U CN2011205098737 U CN 2011205098737U CN 201120509873 U CN201120509873 U CN 201120509873U CN 202490016 U CN202490016 U CN 202490016U
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- connecting plate
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Abstract
The utility model relates to an axis spinous processes screw steel plate comprising a connection plate, a first fixing screw, and a second fixing screw. Two ends of the connection plate are respectively provided with a first connection tunnel and a second connection tunnel. At least one of the first connection tunnel and the second connection tunnel comprises, from top to bottom, a first inner diameter, a second inner diameter, and a third inner diameter. A radial length of the second inner diameter is smaller than that of the first inner diameter as well as that of the third inner diameter. The first fixing screw comprises a first ball head part disposed in the first connection tunnel and a first fixing part disposed in a skeleton. The second fixing screw comprises a second ball head part disposed in the second connection tunnel and a second fixing part disposed in a skeleton. Compared to the prior art, the utility model is advantageous in that the fixing screw disposed on the connection plate is not limited in the direction vertical to the connection plate, and can be adjusted in a plurality of directions in order to adapt to the initially predetermined position of the steel plate; after the position and the angle are determined, the steel plate can be successfully positioned and fixedly connected.
Description
Technical field
This utility model relates to a kind of dentata fixation steel plate.
Background technology
The transverse ligament of atlas fracture of existing human body or Odontoid process do not connect can make the atlas loss of stability, the atlas anterior displacement.Along with the prolongation of the course of disease, the degree of atlas anterior displacement increases the weight of, and the distortion of dentata superior articular surface is tilted to the front lower place, and the soft tissue contracture of extensive region dentata front makes atlas fixing on the position of anterior displacement then, and this situation is called as the stationarity dislocation of atlas.At present, more satisfactory therapeutic scheme is through the oropharynx approach atlas of loosening in this disease of treatment, under the effect of skull traction power, atlas is resetted, and then makes the fixing and bone-graft fusion between the dentata of extensive region from the rear.But loosening at atlas still exists powerful retraction force that it is shifted again after resetting, and its device of internal fixation at dentata rear, extensive region must very firmly just can make atlas fully reset.
Existing extensive region dentata way of escape technique for fixing has the fixation with steel wire method, interlaminar clamp fixation and the pivot side joint screw fixation method through the extensive region.These methods extensive region dentata after resetting that is not suitable for fixedly loosening.Fixation with steel wire between the dentata cantle of extensive region can not stop atlas to the front lower place slippage effectively, and postoperative dislocation recurrence rate is high.And steel wire passes the danger of Spinal Cord under arch of posterior atlas.The interlaminar clamp fixation stops atlas not enough to the strength of front lower place displacement, and operates complicatedly, and clinical practice is difficulty.Pivot side joint screw fixation method is difficult to accomplish in the case that swan neck deformity is arranged the way of escape through the extensive region.
In clinical practice, need a kind of simple to operate, safety; Fixing firm effective extensive region dentata fixed apparatus; Disclose a kind of like this fixed apparatus for this reason in the prior art, seen that the patent No. is the Chinese utility model " extensive region dentata lateral mass nail-plate holder " (Granted publication number for CN2577786Y) of ZL02288645.1, this patent comprises connecting plate and is located at the pedicle screw at connecting plate two ends; Pedicle screw can move up and down in connecting plate bar shaped hole; During use, wherein pedicle screw places the pedicle of vertebral arch of atlas and the pedicle locations of dentata respectively, realizes Atlantoaxial fixing.But having all the time on the parallel lines between this holder pedicle screw, the certain angle that can not stagger each other, controllability is relatively poor, can not adapt to some special connections and fix.Because being exactly screw, the fixing tangible weak point of lamina of axis screw possibly break through veutro cortex entering canalis spinalis infringement neck marrow simultaneously.
The utility model content
This utility model technical problem to be solved is to provide a kind of screw of in a big way, adjusting to stagger angle each other to adapt to highly difficult fixed spinous process of axis screw steel plate to the above-mentioned state of the art.
This utility model another technical problem to be solved is to provide a kind of screw to be difficult for getting into the spinous process of axis screw steel plate that canalis spinalis is invaded the neck marrow to the above-mentioned state of the art.
This utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of spinous process of axis screw steel plate; Comprise connecting plate, first hold-down screw and second hold-down screw; The two ends of this connecting plate have the first connection duct respectively and are connected the duct with second; And aforesaid first hold-down screw and second hold-down screw are connected the duct and are connected the duct with second being arranged at aforesaid first respectively; It is characterized in that the described first connection duct is connected duct internal diameter one of at least and comprises first internal diameter, second internal diameter and the 3rd internal diameter from top to bottom with second; And; The aforesaid second internal diameter radical length is all less than first internal diameter and the 3rd internal diameter, and described first hold-down screw comprises first fixed part of being located at first ball head in the first connection duct and being used to insert skeleton, and described second hold-down screw comprises second fixed part of being located at second ball head in the second connection duct and being used to insert skeleton.
The described first connection duct is connected the duct with second one of at least be " 8 " the word holes of receiving in the middle of two terminal drums.Can adapt to the adjustment of angle on a large scale.
As preferably, the described first connection duct is connected the duct and is " 8 " the word hole of receiving in the middle of two terminal drums with second, and the described first connection duct is connected with second that the duct length direction is vertical each other to be arranged.
As preferably, described connecting plate is the isosceles trapezoid shape, and the described first connection duct is arranged near top margin and parallel connecting plate length direction, and the described second connection duct is arranged near base and vertical connecting plate length direction.
As preferably, the maximum transversal angle between described second hold-down screw and the connecting plate central axis is 100 °, and maximum longitudinal angle is 50 °.
Compared with prior art; The advantage of this utility model is: the direction that is not limited to vertical connecting plate after hold-down screw is located on the connecting plate; Can multi-facetedly regulate, adapting to steel plate initial stage predeterminated position, confirm then can locate smoothly after position and the angle and connect fixing; Operating aspect, applied range; Simultaneously, one of them screw places on the spinous process, and spinous process is a last real part in the cervical vertebra, for screw fixedly provides possibility, can further reduce the generation and the raising of nerve injury and put the nail accuracy rate.
Description of drawings
Fig. 1 is the example structure sketch map.
Fig. 2 is the structural representation at another visual angle of embodiment.
Fig. 3 is a connecting plate structural representation among Fig. 1.
Fig. 4 is along the cutaway view of A-A direction among Fig. 3.
Fig. 5 is the first hold-down screw lateral adjustments angle sketch map.
Fig. 6 is the vertical adjusting angle sketch map of first hold-down screw.
The specific embodiment
Embodiment describes in further detail this utility model below in conjunction with accompanying drawing.
As depicted in figs. 1 and 2; Spinous process of axis screw steel plate comprises connecting plate 3, first hold-down screw 1 and second hold-down screw 2; The two ends of this connecting plate 3 have the first connection duct 31 respectively and are connected duct 32 with second; First hold-down screw 1 and 2 pairs of second hold-down screws are arranged at first respectively and are connected duct 31 and are connected duct 32 with second; First hold-down screw 1 comprises that first fixed part, 12, the second hold-down screws 2 of being located at first ball head 11 in the first connection duct 31 and being used to insert skeleton comprise second fixed part 22 of being located at second ball head 21 in the second connection duct 32 and being used to insert skeleton.
Like Fig. 3 and shown in Figure 4, connecting plate 3 is the isosceles trapezoid shape, and the first connection duct 31 arranges that near top margin and parallel connecting plate length direction the second connection duct 32 is arranged near base and vertical connecting plate length direction.The second connection duct 32 is " 8 " the word hole of receiving in the middle of two terminal drums.The first connection duct 31 is connected the vertical each other layout of duct 32 length directions with second.The second connection duct, 32 internal diameters include first internal diameter, second internal diameter and the 3rd internal diameter from top to bottom, and the second internal diameter radical length H2 is all less than the first internal diameter radical length H1 and the 3rd internal diameter radical length H3.Could realize that like this second ball head 21 rotates.The first connection duct 31 also is the structure setting according to the second connection duct 32.
As shown in Figure 5, second hold-down screw 2 is 100 ° with maximum transversal (vertical connecting plate length direction) angle between connecting plate 3 central axis, and maximum vertically (parallel connecting plate length direction) angle is 50 °.Similarly, first hold-down screw 1 is 50 ° with maximum transversal (vertical connecting plate length direction) angle between connecting plate 3 central axis, and maximum vertically (parallel connecting plate length direction) angle is 100 °.
When using the spinous process of axis screw steel plate in the present embodiment, first hold-down screw 1 places the pedicle locations of atlas, and second hold-down screw 2 can place the spinous process position of dentata.And,, can do the adjustment on the angle to first hold-down screw 1 and second hold-down screw 2 according to the difference slightly of skeleton size and location.
Claims (5)
1. spinous process of axis screw steel plate; Comprise connecting plate, first hold-down screw and second hold-down screw; The two ends of this connecting plate have the first connection duct respectively and are connected the duct with second; And aforesaid first hold-down screw and second hold-down screw are connected the duct and are connected the duct with second being arranged at aforesaid first respectively; It is characterized in that the described first connection duct is connected duct internal diameter one of at least and comprises first internal diameter, second internal diameter and the 3rd internal diameter from top to bottom with second; And; The aforesaid second internal diameter radical length is all less than first internal diameter and the 3rd internal diameter, and described first hold-down screw comprises first fixed part of being located at first ball head in the first connection duct and being used to insert skeleton, and described second hold-down screw comprises second fixed part of being located at second ball head in the second connection duct and being used to insert skeleton.
2. spinous process of axis screw steel plate according to claim 1 is characterized in that the described first connection duct is connected the duct with second one of at least be " 8 " the word holes of receiving in the middle of two terminal drums.
3. spinous process of axis screw steel plate according to claim 2; It is characterized in that the described first connection duct is connected the duct and is " 8 " the word hole of receiving in the middle of two terminal drums with second; And the described first connection duct is connected the vertical each other layout of duct length direction with second.
4. according to the described spinous process of axis screw of arbitrary claim steel plate in the claim 1 ~ 3; It is characterized in that described connecting plate is the isosceles trapezoid shape; And the described first connection duct is arranged near top margin and parallel connecting plate length direction, and the described second connection duct is arranged near base and vertical connecting plate length direction.
5. spinous process of axis screw steel plate according to claim 2 is characterized in that the maximum transversal angle between described second hold-down screw and the connecting plate central axis is 100 °, and maximum longitudinal angle is 50 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205098737U CN202490016U (en) | 2011-12-09 | 2011-12-09 | Axis spinous processes screw steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205098737U CN202490016U (en) | 2011-12-09 | 2011-12-09 | Axis spinous processes screw steel plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202490016U true CN202490016U (en) | 2012-10-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205098737U Expired - Fee Related CN202490016U (en) | 2011-12-09 | 2011-12-09 | Axis spinous processes screw steel plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202490016U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110547871A (en) * | 2019-09-23 | 2019-12-10 | 重庆博仕康科技有限公司 | Photo-magnetic integrated surgical navigation reference frame and marking device |
-
2011
- 2011-12-09 CN CN2011205098737U patent/CN202490016U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110547871A (en) * | 2019-09-23 | 2019-12-10 | 重庆博仕康科技有限公司 | Photo-magnetic integrated surgical navigation reference frame and marking device |
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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: 20121017 Termination date: 20131209 |