CN219700075U - Pedicle screw - Google Patents
Pedicle screw Download PDFInfo
- Publication number
- CN219700075U CN219700075U CN202320615412.0U CN202320615412U CN219700075U CN 219700075 U CN219700075 U CN 219700075U CN 202320615412 U CN202320615412 U CN 202320615412U CN 219700075 U CN219700075 U CN 219700075U
- Authority
- CN
- China
- Prior art keywords
- pedicle screw
- mandrel
- pedicle
- thread section
- utility
- 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.)
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Links
- 238000005452 bending Methods 0.000 claims abstract description 20
- 239000011295 pitch Substances 0.000 claims description 3
- 210000000988 bone and bone Anatomy 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 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
- 238000012545 processing 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
Abstract
The utility model relates to a pedicle screw, which comprises a pedicle screw body and a mandrel arranged in the pedicle screw body, wherein the pedicle screw body is provided with a thread section, the bottom end of the mandrel is of an open structure and is provided with at least two bending parts capable of bending outwards, and the thread section of the pedicle screw body is provided with through holes through which the bending parts can pass one by one. The pedicle screw is matched with the mandrel through the pedicle screw body with special design, and the mandrel can penetrate through the pedicle screw body and be outwards spread, so that the pedicle screw is firmly fixed in bones, and the reliability and safety of an operation are ensured.
Description
Technical Field
The utility model relates to the technical field of medical instruments, in particular to a 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 existing expansion pedicle screw generally comprises a pedicle screw body and a mandrel arranged in the pedicle screw body, and an opening at the bottom end of the pedicle screw body is gradually opened by rotating the mandrel so as to strengthen the fixing strength of the screw. However, the processing technology of the expansion pedicle screw is complex and the manufacturing cost is high.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides the pedicle screw which is simple in structure, convenient to manufacture and firm in fixation.
The utility model is realized by the following technical scheme:
the utility model provides a pedicle screw, includes pedicle screw body and sets up in the internal dabber of pedicle screw, and pedicle screw body has the screw thread section, the dabber bottom is open-ended structure, and it has two at least kinks that can outwards buckle, offer on the screw thread section of pedicle screw body can supply the through-hole that kink one-to-one passed.
Preferably, the thread section includes a first thread section and a second thread section with different pitches sequentially arranged from top to bottom, and the through hole is formed at the second thread section.
In order to facilitate the outward opening of the bending part, the inner side surface of the bottom end of the bending part is an inclined surface which inclines outwards.
In order to reduce the friction force between the outer wall of the bending part and the inner wall of the pedicle screw body, the outer side surface of the bending part is provided with a notch along the length direction.
To facilitate the rotation or movement of the drive spindle, the spindle tip has a notch.
The beneficial effects of the utility model are as follows: the pedicle screw is matched with the mandrel through the pedicle screw body with special design, and the mandrel can penetrate through the pedicle screw body and be outwards spread, so that the pedicle screw is firmly fixed in bones, and the reliability and safety of an operation are ensured.
Drawings
FIG. 1 is a schematic perspective view of a pedicle screw of the utility model;
FIG. 2 is a schematic perspective view of a mandrel according to the present utility model;
fig. 3 is a schematic perspective view of the 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 utility model provides a pedicle screw as shown in figure 1, including pedicle screw body 1 and set up dabber 4 in pedicle screw body 1, pedicle screw body 1 has the screw thread section, the screw thread section includes from last first screw thread section 2 and the second screw thread section 3 that set gradually the pitch is different down, has the cavity in the pedicle screw body 1, dabber 4 sets up in the cavity, can adopt threaded connection between dabber 4 and the cavity, also can adopt interference fit, dabber 4 bottom is open-type structure, it has at least two kinks that can outwards buckle, and offer on the second screw thread section 3 of pedicle screw body 1 can supply the through-hole 5 that kink one-to-one passed.
Specifically, as shown in fig. 2, the whole mandrel 4 is generally in a cylindrical structure, two symmetrically arranged bending parts 6 are arranged at the bottom of the mandrel, the bending parts 6 have an outward-opening elastic force, so that the mandrel can automatically open outwards when the mandrel is not limited by the pedicle screw body 1, the inner side surface at the bottom end of the bending parts 6 is an inclined surface 7 inclined outwards, the inclined surface 7 can guide the bending parts 6 when opening outwards, a notch 8 is formed in the outer side surface of the bending parts 6 along the length direction of the outer side surface, the notch 8 can reduce friction force between the outer wall of the bending parts 6 and the inner wall of the pedicle screw body 4, a notch 9 is formed in the top end of the mandrel 4, and the notch 9 can be matched with a driving tool to realize rotation and movement.
When the pedicle screw is used, the pedicle screw is screwed into a bone, the mandrel 4 is driven by the driving tool to move downwards, when the bending part 6 gradually moves to the through hole 5, the pedicle screw is automatically and outwards opened, and the bending part 6 can penetrate through the through hole 5 and be in contact with the bone as shown in the figure 3, so that the fixation firmness of the pedicle screw is improved.
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.
In addition, in the description of embodiments of the present utility model, unless explicitly stated and limited otherwise, the terms "mounted," "connected," "configured," "provided," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the 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 (5)
1. The utility model provides a pedicle of vertebral arch nail, includes pedicle of vertebral arch nail body and sets up in the internal dabber of pedicle of vertebral arch nail, and pedicle of vertebral arch nail body has screw thread section, its characterized in that: the bottom end of the mandrel is of an open type structure, the mandrel is provided with at least two bending parts capable of bending outwards, and through holes which can be used for the bending parts to pass through one by one are formed in the thread sections of the pedicle screw body.
2. A pedicle screw as claimed in claim 1, wherein: the thread section comprises a first thread section and a second thread section which are sequentially arranged from top to bottom and have different pitches, and the through hole is formed in the second thread section.
3. A pedicle screw as claimed in claim 2, wherein: the inner side surface of the bottom end of the bending part is an inclined surface which inclines outwards.
4. A pedicle screw as claimed in claim 3, wherein: the outer side surface of the bending part is provided with a notch along the length direction.
5. A pedicle screw as claimed in claim 4, wherein: the top end of the mandrel is provided with a notch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320615412.0U CN219700075U (en) | 2023-03-27 | 2023-03-27 | Pedicle screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320615412.0U CN219700075U (en) | 2023-03-27 | 2023-03-27 | Pedicle screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219700075U true CN219700075U (en) | 2023-09-19 |
Family
ID=87983851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320615412.0U Active CN219700075U (en) | 2023-03-27 | 2023-03-27 | Pedicle screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219700075U (en) |
-
2023
- 2023-03-27 CN CN202320615412.0U patent/CN219700075U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |