CN216365218U - Multi-edge self-tapping pedicle screw - Google Patents
Multi-edge self-tapping pedicle screw Download PDFInfo
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- CN216365218U CN216365218U CN202023115148.XU CN202023115148U CN216365218U CN 216365218 U CN216365218 U CN 216365218U CN 202023115148 U CN202023115148 U CN 202023115148U CN 216365218 U CN216365218 U CN 216365218U
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Abstract
The utility model relates to a multi-edge self-tapping pedicle screw, which comprises a threaded rod with a hollow middle part and a screw seat; the front end of the threaded rod is a blade part consisting of a plurality of blades. The utility model has the beneficial effects that: compared with the prior art, the head of the hollow pedicle screw is provided with the self-tapping blade part consisting of the multiple blades, the hollow pedicle screw can be directly screwed in after the guide pin is positioned, reaming and tapping are not needed, the operation time is shortened to the maximum extent, the pain of a patient is reduced, the bleeding amount can be reduced, and great help is provided for the rehabilitation of the patient.
Description
Technical Field
The utility model relates to the technical field of medical instruments, in particular to a multi-edge self-tapping pedicle screw.
Background
The pedicle screw technique has the advantages of three-column fixation, is a well-established spinal surgical technique, and is widely applied. The traditional method adopts a posterior incision open type operation, needs to widely strip structures such as paraspinal muscles, ligaments and the like, is easy to cause the loss of nerve supply of the paraspinal muscles, and is easy for patients to leave sequelae such as lumbar and back pain, stiffness and the like. The operation has large wound, much bleeding and long hospitalization time, and increases the pain and economic burden of patients. The percutaneous minimally invasive pedicle screw technology is applied to clinic in recent years, has small wound, less blood loss and quick recovery, and achieves certain curative effect. At present, a percutaneous pedicle screw system and corresponding minimally invasive surgical instruments are mainly developed by foreign companies and are released in the market, hollow pedicle screws are adopted, the length and the radian of a rod are preset, the instrument design is complicated, the manufacturing process difficulty is high, particularly the processing difficulty of the hollow pedicle screws is high, the manufacturing cost is high, the price is high, and the surgical operation is complex. The percutaneous minimally invasive pedicle screw and rod fixing system and the matched apparatus adopted in China are roughly divided into two categories, one category is still similar to foreign pedicle screws, the hollow pedicle screw design is adopted, and the length and radian of the rod are preset, so that the same defects exist; the other type of non-hollow pedicle screw is applied, but the positioning effect of the hollow pedicle screw cannot be achieved in the process of using the non-hollow pedicle screw, the screw placing position of the pedicle screw is difficult to accurately control, longitudinal rod installation can be completed only by additionally forming holes, and the connecting screw, the extension rod and various sleeves need to be assembled and disassembled for many times, so that the operation is very complicated.
Meanwhile, when the existing hollow pedicle screw is screwed into a vertebral body, the existing hollow pedicle screw needs to be positioned firstly, then hole expansion and a company are carried out, and then the hollow pedicle screw can be screwed in, so that the operation time is long, and the pain of a patient is not relieved.
Disclosure of Invention
Aiming at the current situation of the prior art, the utility model provides a self-tapping pedicle screw with multiple cutting edges.
The specific scheme of the utility model is as follows: a multi-edge self-tapping pedicle screw comprises a threaded rod with a hollow middle part and a screw seat; the front end of the threaded rod is a blade part consisting of a plurality of blades.
Furthermore, the cutting edge is obliquely arranged, and the height of the first cutting edge end is greater than that of the second cutting edge end.
Furthermore, the blades are arranged in an end-to-end connection mode through the side walls, and the first blade end of the previous blade is connected with the second blade end of the next blade.
Furthermore, arc-shaped concave parts are arranged on the cutting edges, and the arc-shaped concave parts of the plurality of cutting edges are combined to form through holes communicated with the hollow part of the threaded rod.
Further, the number of the cutting edges is three.
Furthermore, the nail seat is a U-shaped groove formed by combining two arc-shaped opposite parts, and internal threads are arranged on the inner wall of each arc-shaped opposite part.
Furthermore, the arc-shaped opposite part is provided with a fixing hole.
Furthermore, a concave part is arranged on the outer end face of the blade.
The utility model has the beneficial effects that: compared with the prior art, the head of the hollow pedicle screw is provided with the self-tapping blade part consisting of the multiple blades, the hollow pedicle screw can be directly screwed in after the guide pin is positioned, reaming and tapping are not needed, the operation time is shortened to the maximum extent, the pain of a patient is reduced, the bleeding amount can be reduced, and great help is provided for the rehabilitation of the patient.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
FIG. 2 is a schematic view of the blade structure.
The attached drawings are marked with: 1. a threaded rod; 2. a nail seat; 3. a blade; 301. a first blade end; 302. a second blade end; 4. perforating; a. an internal thread; 201. and (7) fixing holes.
Detailed Description
As shown in figures 1-2, the multi-edge self-tapping pedicle screw comprises a threaded rod 1 with a hollow middle part and a screw seat 2; the front end of the threaded rod 1 is a blade part consisting of a plurality of blades 3.
Through the setting that adopts above-mentioned technical scheme, form self tapping cutting part through 3 links up of a plurality of cutting edges, carry out the step of reaming and tapping when having saved the operation, can directly twist the pedicle of vertebral arch nail through self tapping cutting part, save the operation time.
As a further description of the above technical solution: the cutting edge 3 is obliquely arranged, and the height of the end of the first cutting edge 3 is greater than that of the end of the second cutting edge 3.
Through the setting that adopts above-mentioned technical scheme, set up cutting edge 3 slope, and the blade that is located the 3 ends of first cutting edge of higher position is less than the blade that is located the 3 ends of second cutting edge of lower position, screws into earlier the 3 ends of first cutting edge of little cutting edge when the screw into, and area of contact is little when screwing into, presses powerfully.
As a further description of the above technical solution: through the setting of lateral wall end to end linking between the cutting edge 3, the 3 ends of first cutting edge of preceding cutting edge 3 link up with the 3 ends of second cutting edge of next cutting edge 3.
Through the setting that adopts above-mentioned technical scheme, link up adjacent 3 end-to-end of cutting edge and set up and form self tapping cutting part, conveniently twist.
As a further description of the above technical solution: arc-shaped concave parts are arranged on the cutting edges 3, and the arc-shaped concave parts of the cutting edges 3 are combined to form through holes 4 communicated with the hollow of the threaded rod 1.
As a further description of the above technical solution: the number of the cutting edges 3 is three.
As a further description of the above technical solution: the nail seat 2 is a U-shaped groove formed by combining two arc-shaped opposite parts, and internal threads a are arranged on the inner walls of the arc-shaped opposite parts.
As a further description of the above technical solution: the opposite arc-shaped parts are provided with fixing holes 201.
As a further description of the above technical solution: and a concave part is arranged on the outer end surface of the blade 3.
Through the arrangement of the technical scheme, the concave part is arranged on the outer end face of the blade, so that the weight of the whole blade part is reduced.
The use mode of the utility model is consistent with that of the existing hollow pedicle screw, and the details are not repeated herein.
The utility model has the advantages that: compared with the prior art, the head of the hollow pedicle screw is provided with the self-tapping blade part consisting of the multiple blades, the hollow pedicle screw can be directly screwed in after the guide pin is positioned, reaming and tapping are not needed, the operation time is shortened to the maximum extent, the pain of a patient is reduced, the bleeding amount can be reduced, and great help is provided for the rehabilitation of the patient.
The above is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. The utility model provides a many blades self tapping pedicle of vertebral arch nail which characterized in that: comprises a threaded rod with a hollow middle part and a nail seat; the front end of the threaded rod is a blade part consisting of a plurality of blades.
2. The multi-edged self-tapping pedicle screw as claimed in claim 1, wherein: the upper end face of the blade is obliquely arranged, and the height of the first blade end is greater than that of the second blade end.
3. The multi-edged self-tapping pedicle screw as claimed in claim 1, wherein: the blades are arranged in an end-to-end connection mode through the side walls, and the first blade end of the previous blade is connected with the second blade end of the next blade.
4. The multi-edged self-tapping pedicle screw as claimed in claim 1, wherein: the cutting edges are provided with arc-shaped concave parts, and the arc-shaped concave parts of the plurality of cutting edges are combined to form a through hole communicated with the hollow part of the threaded rod.
5. The multi-edged self-tapping pedicle screw as claimed in claim 1, wherein: the number of the cutting edges is three.
6. The multi-edged self-tapping pedicle screw as claimed in claim 1, wherein: the nail seat is a U-shaped groove formed by combining two arc-shaped opposite parts, and internal threads are arranged on the inner walls of the arc-shaped opposite parts.
7. The multi-edged self-tapping pedicle screw as claimed in claim 6, wherein: the arc-shaped opposite part is provided with a fixing hole.
8. The multi-edged self-tapping pedicle screw as claimed in claim 1, wherein: and a concave part is arranged on the outer end surface of the cutting edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023115148.XU CN216365218U (en) | 2020-12-22 | 2020-12-22 | Multi-edge self-tapping pedicle screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023115148.XU CN216365218U (en) | 2020-12-22 | 2020-12-22 | Multi-edge self-tapping pedicle screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216365218U true CN216365218U (en) | 2022-04-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023115148.XU Active CN216365218U (en) | 2020-12-22 | 2020-12-22 | Multi-edge self-tapping pedicle screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216365218U (en) |
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2020
- 2020-12-22 CN CN202023115148.XU patent/CN216365218U/en active Active
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