CN220141789U - Dynamic pedicle screw - Google Patents
Dynamic pedicle screw Download PDFInfo
- Publication number
- CN220141789U CN220141789U CN202320880139.4U CN202320880139U CN220141789U CN 220141789 U CN220141789 U CN 220141789U CN 202320880139 U CN202320880139 U CN 202320880139U CN 220141789 U CN220141789 U CN 220141789U
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- China
- Prior art keywords
- screw
- threaded part
- core rod
- bottom end
- utility
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- 239000007787 solid Substances 0.000 claims description 4
- 238000011161 development Methods 0.000 claims description 2
- 230000018109 developmental process Effects 0.000 claims description 2
- 230000006835 compression Effects 0.000 abstract description 2
- 238000007906 compression Methods 0.000 abstract description 2
- 230000035876 healing Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 208000015122 neurodegenerative disease Diseases 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 208000037959 spinal tumor Diseases 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 230000008733 trauma Effects 0.000 description 1
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- Surgical Instruments (AREA)
- Prostheses (AREA)
Abstract
The utility model relates to a dynamic pedicle screw which comprises a ball screw, a spherical ring and a screw seat, wherein the top end of the screw seat is pressed into the ball screw through the spherical ring, the screw seat comprises a core rod and a hollow threaded part, the threaded part is sleeved outside the core rod, a cylindrical gap is formed between the threaded part and the core rod, and the bottom end of the threaded part and the bottom end of the core rod are integrally formed. According to the dynamic pedicle screw, a cylindrical gap is arranged between the threaded part and the core rod, after the vertebral body is implanted, two ends of the screw are subjected to compression force of the vertebral body, the core rod can move slightly, so that a fracture block can continuously move relatively within a certain range, and secondary healing of a fracture part is caused.
Description
Technical Field
The utility model relates to the technical field of medical instruments, in particular to a dynamic pedicle screw.
Background
The pedicle screw technology is the most commonly used fixing method in the current spinal surgery, and is widely applied to the fields of lumbar degenerative diseases, spinal tumors, spinal infection, spinal trauma and the like.
The screw thread section of the existing pedicle screw is of a general integral solid structure, and can not move after being implanted into the vertebral body.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides the dynamic pedicle screw which has a simple structure and is convenient to use and beneficial to fracture recovery.
The utility model is realized by the following technical scheme:
the utility model provides a developments pedicle of vertebral arch nail, includes bulb screw, spherical ring and nail seat, the nail seat top is through spherical ring pressure equipment in bulb screw, the nail seat includes core bar and hollow screw thread portion, the screw thread portion cover is located the core bar outside, has cylindric clearance between screw thread portion and the core bar, screw thread portion bottom and core bar bottom integrated into one piece.
Preferably, the core rod tip has a bulb portion corresponding to a spherical ring.
In order to facilitate the micro-movement of the core rod, the top end of the threaded part is provided with an opening.
Preferably, the bottom end of the threaded portion has a solid taper portion, and the bottom end of the core rod and the taper portion are integrally formed.
The beneficial effects of the utility model are as follows: according to the dynamic pedicle screw, a cylindrical gap is arranged between the threaded part and the core rod, after the vertebral body is implanted, two ends of the screw are subjected to compression force of the vertebral body, the core rod can move slightly, so that a fracture block can continuously move relatively within a certain range, and secondary healing of a fracture part is caused.
Drawings
FIG. 1 is a cross-sectional view of a dynamic pedicle screw of the utility model;
fig. 2 is a schematic view of the dynamic pedicle screw of the utility model in use.
Detailed Description
The preferred embodiments of the present utility model will be described in detail below with reference to the attached drawings so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present utility model. The directional terms referred to in the present utility model, such as "up", "down", "front", "back", "left", "right", "top", "bottom", etc., refer only to the directions of the attached drawings. Accordingly, directional terminology is used to describe and understand the utility model and is not limiting of the utility model.
The dynamic pedicle screw shown in fig. 1 comprises a ball screw 1, a spherical ring 2 and a screw seat, wherein the top end of the screw seat is pressed into the ball screw 1 through the spherical ring 2.
Specifically, the nail seat comprises a core rod 3 and a hollow threaded portion 4, the threaded portion 4 is sleeved outside the core rod 3, a cylindrical gap 5 is formed between the threaded portion 4 and the core rod 3, an opening is formed in the top end of the threaded portion 4, the cylindrical gap 5 extends out of the opening, a ball head portion 6 is arranged at the top end of the core rod 3, the ball head portion 6 corresponds to the spherical ring 2, a solid taper portion 7 is formed in the bottom end of the threaded portion 4, and the bottom end of the core rod 3 and the taper portion 7 are integrally formed.
When the vertebral body is implanted, as shown in fig. 2, both ends of the screw are compressed by the vertebral body, the core rod 3 moves slightly (deflects) to enable the fracture block to move continuously and relatively within a certain range, so that the fracture part is healed secondarily.
It should be noted that, the present utility model is not related to the part that is the same as or can be implemented by the prior art.
The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.
Claims (3)
1. The utility model provides a developments pedicle of vertebral arch nail, includes bulb screw, spherical ring and nail seat, nail seat top is through spherical ring pressure equipment in bulb screw, its characterized in that: the nail seat comprises a core bar and a hollow threaded part, wherein the threaded part is sleeved outside the core bar, a cylindrical gap is formed between the threaded part and the core bar, the bottom end of the threaded part and the bottom end of the core bar are integrally formed, the bottom end of the threaded part is provided with a solid conical part, and the bottom end of the core bar and the conical part are integrally formed.
2. The dynamic pedicle screw as claimed in claim 1, wherein: the top end of the core rod is provided with a ball head part, and the ball head part corresponds to the spherical ring.
3. The dynamic pedicle screw as claimed in claim 1, wherein: the top end of the threaded part is provided with an opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320880139.4U CN220141789U (en) | 2023-04-19 | 2023-04-19 | Dynamic pedicle screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320880139.4U CN220141789U (en) | 2023-04-19 | 2023-04-19 | Dynamic pedicle screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220141789U true CN220141789U (en) | 2023-12-08 |
Family
ID=89006015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320880139.4U Active CN220141789U (en) | 2023-04-19 | 2023-04-19 | Dynamic pedicle screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220141789U (en) |
-
2023
- 2023-04-19 CN CN202320880139.4U patent/CN220141789U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |