CN207734209U - A kind of interarticular screw - Google Patents
A kind of interarticular screw Download PDFInfo
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- CN207734209U CN207734209U CN201720497942.4U CN201720497942U CN207734209U CN 207734209 U CN207734209 U CN 207734209U CN 201720497942 U CN201720497942 U CN 201720497942U CN 207734209 U CN207734209 U CN 207734209U
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- screw
- threaded shank
- interarticular
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Abstract
The utility model discloses a kind of interarticular screws, include nut, threaded shank successively from top to bottom, it is provided with card slot on the nut, the screw portion is upper three sections, the uppermost and lowermost of the threaded shank are thread segment, the interlude of the threaded shank is non-threaded section, and the threaded shank is provided with the helical flute from top to bottom.The screw pitch of the screw thread of the threaded shank is 1.4mm.It is the hollow-core construction of 1.6mm inside the screw.The helical flute is three.The screw lower end is tapered.The screw material is TC4.The screw thread of the threaded shank is dextrorotation.The section of the helical flute is that radius is 1mm.The utility model ideally solves drawbacks described above existing for pedicle screw system, and mutual supplement with each other's advantages is technically formed with pedicle screw system.
Description
Technical field
The utility model is related to medical instruments field, more particularly to a kind of novel for the double spiral shells of vertebra internal fixation operation
The interarticular screw of line.
Background technology
Articular process of lumbar vertebra types screw fixation technique is a kind of more traditional Internal fixation technology, both can be separately as intraspinal solid
Determine technology, can also be used as complementary Internal fixation technology.It is small with wound, bleeding is few, disorganization is few, surgical procedure is simple etc.
Advantage.Compared with the pedicle screw for being widely accepted and having approved, biomechanical property is similar, can provide reliable first
Beginning stability.But traditional pedicle screw fixation systems have the following defects：
1, soft tissue stripping it is extensive 2, excessively strong 3, paraspinal muscle stop be destroyed that 4, bleeding is more, and damaged area is big.So that
Orthopedist considers the use of interarticular screw again.
Zygapophysial joint is the unique really movable joint of backbone intervertebral.Facet Joints face is substantially in sagittal plain,
The backbone axial load for carrying 10%-20% plays the role of anti-rotation and shearing resistance, therefore utilizes the pass of special designing
The prominent screw of section is fixed zygapophysial joint, can limit most of activity of lumbar intervertebral.Studies have shown that most of chronic
Nervous symptoms caused by lower lumbar spine illness are related with articular process hyperplasia, so fixing joint tip out section, reduces the activity of articular process,
It can effectively solve the problems, such as that most of flank pains, direct fixing joint tip out section also become the conjunction of atraumatic disease spinal fusion
Reason approach.
Utility model content
In order to solve the above-mentioned technical problem, the utility model provides a kind of simple and reasonable, solution pedicle screw
Drawbacks described above existing for system, and technically form with pedicle screw system the interarticular screw of mutual supplement with each other's advantages.
Technical problem to be solved in the utility model is achieved through the following technical solutions：
A kind of interarticular screw of the utility model includes from top to bottom nut, threaded shank successively, is arranged on the nut
It is upper three sections to have card slot, the screw portion, and the uppermost and lowermost of the threaded shank are thread segment, the threaded shank
Interlude is non-threaded section, and the threaded shank is provided with the helical flute from top to bottom.
Further, the screw pitch of the screw thread of the threaded shank is 1.4mm.
Further, it is the hollow-core construction of 1.6mm inside the screw.
Further, the helical flute is three.
Further, the screw lower end is tapered.
Further, the screw material is TC4.
Further, the screw thread of the threaded shank is dextrorotation.
Further, the section of the helical flute is the circular arc that radius is 1mm.
According to the above aspect of the present invention, the utility model has at least the following advantages：
A kind of interarticular screw of the utility model, it is simple in structure, it is implanted by homonymy zygapophysial joint under direct-view, position
It is accurate to set comparison, it is easy to operate.The postoperative activity that can effectively reduce zygapophysial joint improves stability, and safety is also simultaneously
No less than pedicle screw system, have bleeding is few, operating time is short, backbone rear structure destroy it is small, using Minimally Invasive Surgery side
The advantages such as formula implantation.Drawbacks described above existing for pedicle screw system is ideally solved, and with pedicle screw system in technology
Upper formation has complementary advantages.
The above description is merely an outline of the technical solution of the present invention, in order to better understand the skill of the utility model
Art means, and can be implemented in accordance with the contents of the specification, below on the preferred embodiment of the present invention and the accompanying drawings in detail
It describes in detail bright as after.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of interarticular screw of the utility model.
1, nut；2, threaded shank；3, card slot；4, uppermost；5, interlude；6, lowermost；7, helical flute.
Specific implementation mode
With reference to the accompanying drawings and examples, specific embodiment of the present utility model is described in further detail.Below
Embodiment is not intended to limit the scope of the present invention for illustrating the utility model.
Shown in Figure 1, a kind of interarticular screw includes from top to bottom nut 1, threaded shank 2 successively, is arranged on nut 1
There is card slot 3, it is upper three sections that threaded shank 2, which is divided, and the uppermost 4 and lowermost 6 of threaded shank 2 are thread segment, the interlude of threaded shank 2
5 be non-threaded section, and threaded shank 2 is provided with the helical flute 7 from top to bottom.
The screw pitch of the screw thread of threaded shank 2 is 1.4mm.It is the hollow-core construction of 1.6mm inside screw.Helical flute 7 is three
Item.Screw lower end is tapered.Screw material is TC4.
The screw thread of threaded shank 2 is dextrorotation.The section of helical flute 7 is the circular arc that radius is 1mm.
A kind of interarticular screw of the utility model, by the way that the two sections of screw thread are arranged to screw thread, interlude is arranged
At non-threaded configurations, spine structure is perfectly matched, while increasing the lock ability to backbone.
A kind of interarticular screw of the utility model is equipped with chip space 7, in articular process of lumbar vertebra types screw fixation technique, screw
The process of implantation will produce tissue debris, and a kind of interarticular screw of the utility model is equipped with chip space 7, for tissue to be discharged
Clast.
A kind of interarticular screw of the utility model uses hollow-core construction, is conveniently operated screw and is precisely set along bone conduction draw pin
Enter, convenient for being oriented to.
A kind of specifically used method of interarticular screw of the utility model is as follows：
Patient uses side-lying body position, determines point of puncture in body surface, cuts the operative incision of 10mm or so, holds bone probe puncture
To the next centrum articular process, bone probe inner core is withdrawn from rotation, and bone conduction draw pin is placed in along bone probe casing, bone is determined by perspective
The position of guid needle.
Reamer in hand-held, the reamer along seal wire rotation merging, blunt separation musculature, until upper centrum articular process
Position.
Quick-mounting handle is connect with outer reamer, outer reamer is incorporated into articular process position along the rotation of interior reamer, is removed
Go out interior reamer, should ensure that any mobile dislocation does not occur for the position of bone conduction draw pin in operating process, set nail service aisle and establish
It completes.
Quick-change handle is installed on bone drill, along bone conduction draw pin from processus articular superior to the direction of inferior articular process and pedicle of vertebral arch into
Row punching, bone drill are equipped with scale, and the depth of punching is determined according to the length of preset pedicle screw, bone is withdrawn from after the completion of screw way
It bores.
Quick-change handle is installed on bone screw tap, for screw way establish with the matched thread of interarticular screw, depth and beat
Hole depth is identical, withdraws from bone screw tap after the completion.
Interarticular screw is together by a threaded connection with bone with screwdriver, Quick-change handle is mounted on bone screwdriver
On, enter service aisle along bone conduction draw pin, inserts screws into screw way, depth is consistent with punching depth, gradually withdraws from after the completion
All surgical instruments, bind up a wound, and operation finishes.
The above description is merely an outline of the technical solution of the present invention, in order to better understand the skill of the utility model
Art means, and can be implemented in accordance with the contents of the specification, below on the preferred embodiment of the present invention and the accompanying drawings in detail
It describes in detail bright as after.
The above is only the preferred embodiment of the utility model, is not intended to limit the utility model, it is noted that
For those skilled in the art, without deviating from the technical principle of the utility model, it can also do
Go out several improvements and modifications, these improvements and modifications also should be regarded as the scope of protection of the utility model.
Claims (8)
1. a kind of interarticular screw, which is characterized in that include nut (1), threaded shank (2), the nut (1) successively from top to bottom
On be provided with card slot (3), the threaded shank (2) is divided into three sections, and the uppermost (4) and lowermost (6) of the threaded shank (2) are equal
Interlude (5) for thread segment, the threaded shank (2) is non-threaded section, and the threaded shank (2) is provided with from top to bottom
Helical flute (7).
2. a kind of interarticular screw according to claim 1, which is characterized in that the screw pitch of the screw thread of the threaded shank (2)
For 1.4mm.
3. a kind of interarticular screw according to claim 1, which is characterized in that be the hollow of 1.6mm inside the screw
Structure.
4. a kind of interarticular screw according to claim 1, which is characterized in that the helical flute (7) is three.
5. a kind of interarticular screw according to claim 1, which is characterized in that the screw lower end is tapered.
6. a kind of interarticular screw according to claim 1, which is characterized in that the screw material is TC4.
7. a kind of interarticular screw according to claim 1, which is characterized in that the screw thread of the threaded shank (2) is dextrorotation.
8. a kind of interarticular screw according to claim 1, which is characterized in that the section of the helical flute (7) is
Radius is the circular arc of 1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720497942.4U CN207734209U (en) | 2017-05-05 | 2017-05-05 | A kind of interarticular screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720497942.4U CN207734209U (en) | 2017-05-05 | 2017-05-05 | A kind of interarticular screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207734209U true CN207734209U (en) | 2018-08-17 |
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ID=63113659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720497942.4U Active CN207734209U (en) | 2017-05-05 | 2017-05-05 | A kind of interarticular screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207734209U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023235783A1 (en) * | 2022-06-03 | 2023-12-07 | Seaspine Orthopedics Corporation | Bone screw apparatus |
-
2017
- 2017-05-05 CN CN201720497942.4U patent/CN207734209U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023235783A1 (en) * | 2022-06-03 | 2023-12-07 | Seaspine Orthopedics Corporation | Bone screw apparatus |
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