CN200970263Y - Reducing diameter pediculusarcus vertebrae screw - Google Patents
Reducing diameter pediculusarcus vertebrae screw Download PDFInfo
- Publication number
- CN200970263Y CN200970263Y CN 200620134185 CN200620134185U CN200970263Y CN 200970263 Y CN200970263 Y CN 200970263Y CN 200620134185 CN200620134185 CN 200620134185 CN 200620134185 U CN200620134185 U CN 200620134185U CN 200970263 Y CN200970263 Y CN 200970263Y
- Authority
- CN
- China
- Prior art keywords
- pedicle screw
- reduction
- reducing
- head
- screwed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a reduction vertebral arch pedicle bolt, which comprises body of the vertebral arch pedicle bolt and a reduction sleeve, wherein the reduction sleeve is a cylindrical barrel with an internal diameter matched with body of the vertebral arch pedicle bolt; barrel wall is provided with a reduction groove that extends longitudinally along and penetrates through the barrel body; exterior wall of the barrel is provided with threads; body of the vertebral arch pedicle bolt consists of a head and a screw-in end provided with threads; the screw-in end is screwed into the reduction sleeve. Since the reduction vertebral arch pedicle bolt comprises a body and a reduction sleeve and the reduction sleeve is provided with a reduction groove, the bolt body can be screwed into the reduction sleeve so that the bolt body can spread the reduction sleeve and make close contact between the reduction sleeve and bone tissues; when errors occur with size and gradient of nail holes, such errors can be compensated quickly to ensure connecting strength of bolts and avoid re-punching, and surgical quality is guaranteed.
Description
Technical field
This utility model relates to a kind of screw, refers in particular to a kind of pedicle screw that is used on the human vertebra, belongs to technical field of medical instruments.
Background technology
With the pedicle screw implant into body time, need punching earlier again pedicle screw to be screwed in the nail hole, for osteoporotic patient, the gmatjpdumamics that pedicle screw screws in nail Kong Houyu nail hole wall is very little, and bonding strength is lower; In addition in case in the punching process nail hole produce or the nail hole cross mostly will cause pedicle screw screw in the back connect insecure, influence operation quality.
The utility model content
At above-mentioned situation, the purpose of this utility model is to provide a kind of reducing pedicle screw.
For achieving the above object, technical solution of the present utility model is:
A kind of reducing pedicle screw, form by pedicle screw body and drill holder, described drill holder is the cylindrical tube that internal diameter and described pedicle screw body are complementary, barrel wall is provided with the reducing groove that extends axially and run through whole cylindrical shell along cylindrical shell, cylinder body outer wall is provided with screw thread, the pedicle screw body comprises head and the threaded end that is screwed into is set that this is screwed into end and screws in the drill holder.
Further, to be provided with the cross section be orthohexagonal cavity to described reducing pedicle screw inner body wall.
Further, described reducing pedicle screw inner body wall is provided with cylindrical cavity, and cavity sidewalls is provided with screw thread.
Further, described reducing pedicle screw body is screwed into end for solid.
Further, the head of described pedicle screw body is spherical, and this spherical head is with Universal-head outward.
Because this utility model reducing pedicle screw is made up of pedicle screw body and drill holder, drill holder is provided with the reducing groove, therefore the pedicle screw body being screwed in the drill holder makes the pedicle screw body that drill holder is strutted, thereby drill holder and osseous tissue are combined closely, when appearring in hole size and gradient, error can remedy this error when following closely, guarantee the bonding strength of screw, for osteoporotic patient, the bonding strength of screw can be guaranteed equally.
Description of drawings
Fig. 1 is the cutaway view of this utility model pedicle nail body;
Fig. 2 is this utility model drill holder cutaway view;
Fig. 3 is that the A of Fig. 2 is to view;
Fig. 4 is the cutaway view of the pedicle nail body of this utility model embodiment two.
The specific embodiment
As shown in Figure 1, 2, 3, this utility model reducing pedicle screw comprises pedicle screw body 1 and drill holder 2, pedicle screw body 1 comprises head 11 and is screwed into end 12, it is orthohexagonal groove 111 that head 11 is provided with the cross section, be screwed into end 12 outsides and be provided with screw thread, it is orthohexagonal cavity 121 that inwall is provided with the cross section; Drill holder 2 is the cylindrical tube that internal diameter and pedicle screw body 1 are complementary, and barrel wall is provided with the reducing groove 21 that extends axially and run through whole cylindrical shell along cylindrical shell, and cylinder body outer wall is provided with screw thread 22, and cylindrical shell one end is provided with the anti-structure 24 of revolving;
In the operation process, by the anti-structure 24 of revolving drill holder 2 is screwed in the nail hole earlier, again pedicle screw body 1 is screwed in drill holder 2, the external diameter of pedicle screw body 1 is a bit larger tham the internal diameter of drill holder 2, under the effect of pedicle screw body 1, thus drill holder 2 strut with the nail hole be connected more firm.
In addition, pedicle screw body 1 also can adopt common solid screw, and cavity 121 also can be made as cylindrical, at cavity 121 sidewalls screw thread is set.
Shown in Fig. 4 embodiment two, ' be made as sphere as shown in the figure, this spherical head is with Universal-head 3 outward to the head 11 of pedicle screw body 1, and Universal-head 3 can rotate in 360 ° of scopes relative to head 11 '.
And head is made as shown in the embodiment two spherical and be with Universal-head after, therefore when the nail hole deflects in the operation process, because Universal-head head relatively rotates, so the position of Universal-head just also can be adjusted to, and the position of being located at the nut on the Universal-head can not produce crooked yet.
Claims (5)
1, a kind of reducing pedicle screw, it is characterized in that, form by pedicle screw body and drill holder, described drill holder is the cylindrical tube that internal diameter and described pedicle screw body are complementary, barrel wall is provided with the reducing groove that extends axially and run through whole cylindrical shell along cylindrical shell, cylinder body outer wall is provided with screw thread, and the pedicle screw body comprises head and the threaded end that is screwed into is set that this is screwed into end and screws in the drill holder.
2, reducing pedicle screw as claimed in claim 1 is characterized in that, it is orthohexagonal cavity that described pedicle screw inner body wall is provided with the cross section.
3, reducing pedicle screw as claimed in claim 1 is characterized in that, described pedicle screw inner body wall is provided with cylindrical cavity, and cavity sidewalls is provided with screw thread.
4, reducing pedicle screw as claimed in claim 1 is characterized in that, the end that is screwed into of described pedicle screw body is solid.
As claim 2 or 3 described reducing pedicle screws, it is characterized in that 5, the head of described pedicle screw body is spherical, this spherical head is with Universal-head outward.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620134185 CN200970263Y (en) | 2006-10-27 | 2006-10-27 | Reducing diameter pediculusarcus vertebrae screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620134185 CN200970263Y (en) | 2006-10-27 | 2006-10-27 | Reducing diameter pediculusarcus vertebrae screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200970263Y true CN200970263Y (en) | 2007-11-07 |
Family
ID=38881519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620134185 Expired - Fee Related CN200970263Y (en) | 2006-10-27 | 2006-10-27 | Reducing diameter pediculusarcus vertebrae screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200970263Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107280756A (en) * | 2017-07-21 | 2017-10-24 | 西安康拓医疗技术有限公司 | A kind of medical cranial Bone nail structure |
-
2006
- 2006-10-27 CN CN 200620134185 patent/CN200970263Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107280756A (en) * | 2017-07-21 | 2017-10-24 | 西安康拓医疗技术有限公司 | A kind of medical cranial Bone nail structure |
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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: 20071107 Termination date: 20111027 |