CN205107856U - Pedicle of vertebral arch spiral shell screw tail end control hold -down bars - Google Patents
Pedicle of vertebral arch spiral shell screw tail end control hold -down bars Download PDFInfo
- Publication number
- CN205107856U CN205107856U CN201520850721.1U CN201520850721U CN205107856U CN 205107856 U CN205107856 U CN 205107856U CN 201520850721 U CN201520850721 U CN 201520850721U CN 205107856 U CN205107856 U CN 205107856U
- Authority
- CN
- China
- Prior art keywords
- hold
- down bars
- pedicle
- tail end
- vertebral arch
- 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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- Surgical Instruments (AREA)
- Prostheses (AREA)
Abstract
The utility model discloses a pedicle of vertebral arch spiral shell screw tail end control hold -down bars, it includes the hold -down bars body, terminal an organic whole of hold -down bars body is connected with the inflated excellent tail of diameter, the diameter of excellent tail be greater than the diameter of hold -down bars body. The utility model discloses a pedicle of vertebral arch spiral shell screw tail end control hold -down bars performs the operation when installing, need not to control the length of hold -down bars body tail end, needn't receive the restriction in the field of vision during installation, can as long as pay close attention to head end length when installing the hold -down bars like this. Convenient to use, simple structure.
Description
Technical field
This utility model belongs to medical instruments field, is specifically related to a kind of pedicle screw tail end and controls hold-down bars.
Background technology
Via Posterior Spinal Approach nail-stick system is applicable to implement temporary or permanent rectification or fixing to thoracic vertebra to the vertebral body of sacral, its objective is and helps to reinforce or promote that bone merges.Its stable, increase fusion rate with rigidity is recovered the superioritys such as physiological camber and is existed.Generally, nail-stick system comprises pedicle screw and hold-down bars, during installation, pedicle screw is screwed into vertebral body, then hold-down bars is located in the U-shaped draw-in groove at pedicle screw top, but when installing pedicle screw hold-down bars at present, tail end is due to tissue stop, the visual field is bad, the length of uncontrollable hold-down bars tail end.Therefore need the nail-stick system designing a kind of novel hold-down bars and use this hold-down bars, the restriction in the visual field when this nail-stick system is installed, need not be subject to.
Utility model content
The purpose of this utility model is to provide a kind of pedicle screw tail end to control hold-down bars.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of pedicle screw tail end controls hold-down bars, and it comprises hold-down bars body, and the end of described hold-down bars body is connected with the excellent tail of enlarged diameter, and the diameter of described excellent tail is greater than the diameter of hold-down bars body.
A kind of pediculus arous vertebrae nail bar fixator, it comprises pedicle of vertebral arch and determines screw and hold-down bars, described hold-down bars is the hold-down bars of said structure, and the top that described pedicle of vertebral arch determines screw is provided with U-shaped draw-in groove, and described U-shaped draw-in groove and the hold-down bars body of described hold-down bars match.
During installation, pedicle screw is screwed into vertebral body, is then located in the U-shaped draw-in groove at pedicle screw top by the hold-down bars body of hold-down bars, the excellent tail of the enlarged diameter of described hold-down bars body tip is fastened on outside U-shaped draw-in groove.Without the need to controlling the length of hold-down bars body tail end, the restriction in the visual field during installation, need not be subject to, as long as pay close attention to head end length when installing hold-down bars like this.
The beneficial effects of the utility model:
The pedicle screw tail end of this utility model design controls hold-down bars, when operation is installed, without the need to controlling the length of hold-down bars body tail end, need not be subject to the restriction in the visual field during installation, as long as pay close attention to head end length when installing hold-down bars like this.Easy to use, structure is simple.
Accompanying drawing explanation
Fig. 1 is that pedicle screw tail end controls hold-down bars structure chart.
Fig. 2 is pediculus arous vertebrae nail bar fixator front view.
Fig. 3 is pediculus arous vertebrae nail bar fixator right view.
Fig. 4 is pediculus arous vertebrae nail bar fixator left view.
Detailed description of the invention
As shown in Figure 1, a kind of pedicle screw tail end controls hold-down bars, and it comprises hold-down bars body 1, and the end of described hold-down bars body 1 is connected with the excellent tail 2 of enlarged diameter, and the diameter of described excellent tail 2 is greater than the diameter of hold-down bars body 1.
As shown in Figure 2, Figure 3 and Figure 4, a kind of pediculus arous vertebrae nail bar fixator, it comprises pedicle of vertebral arch and determines screw 3 and hold-down bars, described hold-down bars is hold-down bars as shown in Figure 1, the top that described pedicle of vertebral arch determines screw 3 is provided with U-shaped draw-in groove 4, and described U-shaped draw-in groove 4 matches with the hold-down bars body 1 of described hold-down bars.During installation, pedicle screw 3 is screwed into vertebral body, in the U-shaped draw-in groove then the hold-down bars body 1 of hold-down bars being located at pedicle screw 3 top 4, the excellent tail 2 of the enlarged diameter of described hold-down bars body 1 end is fastened on outside U-shaped draw-in groove 4.Without the need to controlling the length of hold-down bars body 1 tail end, the restriction in the visual field during installation, need not be subject to, as long as pay close attention to head end length when installing hold-down bars like this, and easy to use, structure is simple.
Claims (2)
1. a pedicle screw tail end controls hold-down bars, it is characterized in that it comprises hold-down bars body (1), the end of described hold-down bars body (1) is connected with the excellent tail (2) of enlarged diameter, and the diameter of described excellent tail (2) is greater than the diameter of hold-down bars body (1).
2. a pediculus arous vertebrae nail bar fixator, it is characterized in that it comprises pedicle of vertebral arch and determines screw (3) and hold-down bars, described hold-down bars is hold-down bars according to claim 1, the top that described pedicle of vertebral arch determines screw (3) is provided with U-shaped draw-in groove (4), and described U-shaped draw-in groove (4) matches with the hold-down bars body (1) of described hold-down bars.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520850721.1U CN205107856U (en) | 2015-10-29 | 2015-10-29 | Pedicle of vertebral arch spiral shell screw tail end control hold -down bars |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520850721.1U CN205107856U (en) | 2015-10-29 | 2015-10-29 | Pedicle of vertebral arch spiral shell screw tail end control hold -down bars |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205107856U true CN205107856U (en) | 2016-03-30 |
Family
ID=55563514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520850721.1U Expired - Fee Related CN205107856U (en) | 2015-10-29 | 2015-10-29 | Pedicle of vertebral arch spiral shell screw tail end control hold -down bars |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205107856U (en) |
-
2015
- 2015-10-29 CN CN201520850721.1U patent/CN205107856U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160330 Termination date: 20171029 |