CN2577786Y - Lateral atlantoepistrophic block nail plate fixer - Google Patents
Lateral atlantoepistrophic block nail plate fixer Download PDFInfo
- Publication number
- CN2577786Y CN2577786Y CN 02288645 CN02288645U CN2577786Y CN 2577786 Y CN2577786 Y CN 2577786Y CN 02288645 CN02288645 CN 02288645 CN 02288645 U CN02288645 U CN 02288645U CN 2577786 Y CN2577786 Y CN 2577786Y
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- China
- Prior art keywords
- screw
- pedicle
- screwed
- connecting plate
- extensive region
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Abstract
The utility model discloses a fixing device for nail plates for lateral atlantoaxial blocks, which comprises a connecting plate. Two holes are arranged in the connecting plate, and vertebral arch root screw nails used for fixation respectively penetrate through the holes. Matched screw nuts are arranged on the vertebral arch root screw nails used for fixation. The utility model has simple structure, can make the atlantoaxial strongly fixed in a three-dimensional mode. Because the vertebral arch root screw nails used for fixation, which has gradually changeable thread height, are used in the fixing device, the break resisting performance of the screw nails is enhanced, and the pull resisting performance of the screw nails is enhanced. In addition, the utility model is convenient to operate in operation and ensures safety.
Description
Technical field
This utility model belongs to the Orthopeadic Surgery holder, especially a kind of extensive region dentata lateral mass nail-plate holder.
Background technology
The transverse ligament of atlas fracture of 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 through pivot side, extensive region joint screw fixation method.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, postoperative dislocation recurrence rate height.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.
The way of escape is difficult to finish in the case that swan neck deformity is arranged through pivot side, extensive region joint screw fixation method.
In clinical practice, need a kind of simple to operate, safety, fixing firm effective extensive region dentata fixed apparatus.
Summary of the invention
The purpose of this utility model is to improve deficiency of the prior art, a kind of fixing-stable used when the disease of irreducible dislocation of atlas is implemented reattachment surgery, safe and reliable is provided, and do not need in advance with the extensive region dentata fully reset, easy to operate extensive region dentata lateral mass nail-plate holder.
The purpose of this utility model is achieved in that
The extensive region dentata lateral mass nail-plate holder that this utility model provides comprises a connecting plate, on this connecting plate, be provided with two holes, in described hole, respectively wear and be equipped with a fixing pedicle screw of using, described pedicle screw is provided with a convex shoulder, this convex shoulder is divided into the section of being screwed into that is screwed in the skeleton with pedicle screw and is used for fixing the canned paragraph of connecting plate, on described section of being screwed into and canned paragraph, be equipped with screw thread, on this fixing canned paragraph, be connected with the nut that is complementary with pedicle screw.This two hole is preferably slotted hole, so that the spacing of the hold-down screw on this connecting plate can be adjusted within the specific limits, so that this holder can be suitable for different spacing between different patients' atlas and the dentata within the specific limits.
When using this extensive region dentata lateral mass nail-plate holder enforcement atlas to reset fixedly, one on this holder can be fixed and insert along the lateral mass of atlas longitudinal axis by the arch of posterior atlas root with the section of being screwed into of pedicle screw.The arch of posterior atlas root, the section of being screwed into of another root pedicle screw enters pedicle of vertebral arch along the dentata interarticularis,pars, wears described connecting plate then on the canned paragraph of two hold-down screws.At this moment, the extensive region dentata may still be in slight dislocation state, only otherwise the compressing spinal cord gets final product, be spirally connected the canned paragraph of pedicle screw with the locking of connecting plate and pedicle screw with described nut then, this device is fixed on after the extensive region dentata sentences, and by screwing described nut, the anterior displacement atlas is just had the effect of post-tensioning, locking in the process of described connecting plate and pedicle screw with nut, atlas just resets gradually.And can making the extensive region dentata be stabilized on the reset position, the structure of this holder locks.
Fixing screw thread with the section of being screwed on the pedicle screw on this holder preferably its end directly has tapering, and promptly the degree of depth of this screw thread is the structure that is shoaled gradually near the root at convex shoulder place by the screw taper.The degree of depth that has the screw thread of the section of being screwed on the general screw now is consistent, the screw of this structure is not suitable for this device, because employed pedicle screw is different from and is used for breast in this extensive region dentata lateral mass nail-plate holder, the screw that lumbar vertebra etc. are located, because pedicle of vertebral arch is thinner, pedicle screw can not design too slightly, but pedicle screw needs to screw in the skeleton than the depths, and this holder is to place inside of human body for a long time, the screw that screw thread is dark excessively, the intensity of the cross section of screw is lower, fracture than being easier to, it is danger close that this screw is used for this holder.Otherwise, if use the shallow excessively screw of screw thread, then in operation, be not easy screw threads is gone in the skeleton, in addition, if screw thread is shallow excessively, screw also is pulled out in skeleton easily.And the pedicle screw that this holder provides is darker screw thread at taper, and to the root of screw, also be that screw places the stressed maximum of skeleton, the easiest place that fractures that more shallow screw thread is set, such structure both can guarantee in operation that pedicle screw successfully screws in skeleton and has stronger resistance to plucking and go out performance, and can make the stressed big part of root of this screw obtain higher intensity and non-frangibility again.
The depth of the screw thread of described pedicle screw from the root of shank of screw to taper changes the excessive danger that also can have fracture, the screw-in of the too small then screw of depth variation of screw thread also can be poor, it is also relatively poor that resistance to plucking goes out performance, calculate and test through theory, found out the preferred values scope that the screw thread depth of the described section of being screwed into of this pedicle screw changes, by the taper of the screw section of being screwed into to the end tapering directly of root screw thread usually 1: 12～28.When the external diameter of the screw section of being screwed into during at 3～4 millimeters, preferably 2 ± 0.5 millimeters in the footpath, the end of the taper screw thread of screw, and equate with the external diameter of screw thread at its core diameter of thread of root of screw.
In addition, employed two its thread rotary orientations of described screw are preferably opposite in this holder.Because the art open country that undergos surgery at the pedicle of vertebral arch place is very little, make the described convex shoulder place that can not clamp pedicle screw in the fixed process of connecting plate at hold-down nut with instrument, if the rotation direction of described screw is identical, Atlantoaxial translation dislocation then takes place in the process of fastening this screw of bilateral in operation easily, and use the opposite screw of rotation direction, can avoid the appearance of translation dislocation.
The extensive region dentata lateral mass nail-plate fixer structure that this utility model provides is simple, and operation technique is convenient, can make the extensive region dentata obtain strong three-dimensional fixation.Further,, not only improved the anti-performance that fractures of screw but also strengthened its going out property of resistance to plucking because this holder uses the pedicle screw of depth of thread gradual change, and in can performing the operation handled easily, guarantee safety.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
The main TV structure sketch map of the extensive region dentata lateral mass nail-plate holder that Fig. 1 provides for this utility model;
Fig. 2 is the right TV structure sketch map of holder shown in Figure 1;
Fig. 3 is the structural representation that the pedicle screw in the holder is connected with nut;
The fixing sketch map of atlas and dentata of the extensive region dentata lateral mass nail-plate holder that provides with this utility model is provided Fig. 4.
The specific embodiment
As illustrated in fig. 1 and 2, the extensive region dentata lateral mass nail-plate holder that this utility model provides comprises a connecting plate 1, on connecting plate 1, be provided with two slotted holes 11, in hole 11, respectively wear and be equipped with a fixing pedicle screw 2 of using, on pedicle screw 2, be provided with the nut 3 that is complementary.
Hold-down screw 2 on this holder is provided with a convex shoulder 22, convex shoulder 22 is divided into section of being screwed into 21 that is screwed in the skeleton and the canned paragraph 23 that is used for fixing connecting plate with pedicle screw, be equipped with screw thread on section of being screwed into 21 and canned paragraph 23, the degree of depth of the screw thread on the section of being screwed into 21 is the structure that is shoaled gradually to root 212 by screw taper 211.
As shown in Figure 3, screw 2 sections of being screwed into 21 by taper 211 to the variation of the degree of depth of root 212 screw threads can be, by the taper 211 of the screw section of being screwed into 21 tapering 1: 12～28 to the footpath, the end of root 212 screw threads.When the external diameter of the screw section of being screwed into 21 during, directly be 2 ± 0.5 millimeters at the end of the taper screw thread of screw, and equate with the external diameter of screw thread at its core diameter of thread of root of screw at 3～4 millimeters.
Employed two screws, 2 its thread rotary orientations are opposite in this holder.A screw is a right-handed thread, and another screw is a left hand thread.
Show this holder fixed situation on atlas 4 and dentata 5 as Fig. 4, a pedicle screw 3 is wherein inserted the arch of posterior atlas root along the atlas 4 lateral mass longitudinal axis, another root pedicle screw 3 enters pedicle of vertebral arch along dentata 5 interarticularis,parses, again connecting plate 1 is worn on these two pedicle screws 3 by two slotted holes 11 on it, fix by screwing on nut then, promptly atlas 4 and dentata 5 can be done stable fixing.
Claims (6)
1, a kind of extensive region dentata lateral mass nail-plate holder, it is characterized in that: comprise a connecting plate, on this connecting plate, be provided with two holes, in described hole, respectively wear and be equipped with a fixing pedicle screw of using, described pedicle screw is provided with a convex shoulder, the section of being screwed into that this convex shoulder is divided into pedicle screw to be screwed in the skeleton and be used for fixing the canned paragraph of connecting plate is equipped with screw thread on described section of being screwed into and canned paragraph, be provided with the nut that is complementary on this fixes with pedicle screw.
2, extensive region according to claim 1 dentata lateral mass nail-plate holder, it is characterized in that: two holes on the described connecting plate are slotted hole.
3, extensive region according to claim 1 dentata lateral mass nail-plate holder is characterized in that: the screw thread of the section of being screwed into of described pedicle screw directly has tapering for its end, and promptly its degree of depth is the structure that is shoaled gradually to the root at convex shoulder place by the screw taper.
4, extensive region according to claim 3 dentata lateral mass nail-plate holder is characterized in that: described fixing tapering with this screw thread of pedicle screw is 1: 12～28.
5, according to claim 1 or 4 described pedicle screws, it is characterized in that:, directly be 2 ± 0.5 millimeters at the end of the taper screw thread of screw, and equate with the external diameter of screw thread at its core diameter of thread of root of screw when the external diameter of the screw section of being screwed into during at 3～4 millimeters.
6, according to claim 1 or 2 or 3 or 4 or 5 described extensive region dentata lateral mass nail-plate holders, it is characterized in that: the thread rotary orientation of described two pedicle screws is opposite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02288645 CN2577786Y (en) | 2002-11-22 | 2002-11-22 | Lateral atlantoepistrophic block nail plate fixer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02288645 CN2577786Y (en) | 2002-11-22 | 2002-11-22 | Lateral atlantoepistrophic block nail plate fixer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2577786Y true CN2577786Y (en) | 2003-10-08 |
Family
ID=33748463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02288645 Expired - Lifetime CN2577786Y (en) | 2002-11-22 | 2002-11-22 | Lateral atlantoepistrophic block nail plate fixer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2577786Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106108996A (en) * | 2016-07-18 | 2016-11-16 | 哈尔滨理工大学 | A kind of pedicle screw holder |
| CN107255111A (en) * | 2017-07-06 | 2017-10-17 | 江苏永昊高强度螺栓有限公司 | Bimetallic Contiuum type bolt |
-
2002
- 2002-11-22 CN CN 02288645 patent/CN2577786Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106108996A (en) * | 2016-07-18 | 2016-11-16 | 哈尔滨理工大学 | A kind of pedicle screw holder |
| CN107255111A (en) * | 2017-07-06 | 2017-10-17 | 江苏永昊高强度螺栓有限公司 | Bimetallic Contiuum type bolt |
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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 | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20121122 Granted publication date: 20031008 |