CN117860365A - Method for inserting arc screw - Google Patents
Method for inserting arc screw Download PDFInfo
- Publication number
- CN117860365A CN117860365A CN202311865060.5A CN202311865060A CN117860365A CN 117860365 A CN117860365 A CN 117860365A CN 202311865060 A CN202311865060 A CN 202311865060A CN 117860365 A CN117860365 A CN 117860365A
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- China
- Prior art keywords
- arc
- screw
- shaped
- needle
- fixing
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000002513 implantation Methods 0.000 claims abstract description 4
- 238000010079 rubber tapping Methods 0.000 claims description 3
- 238000005452 bending Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 210000004197 pelvis Anatomy 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000010146 3D printing Methods 0.000 description 2
- 238000012966 insertion method Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Abstract
The invention provides an arc screw implantation method, which comprises the following steps: selecting a proper arc screw and a soft drill; planning a nail feeding position of an arc screw at one end of the spliced object; under the holding of the arc sleeve, the drill bit of the arc soft drill is stopped after moving to a planning position; driving an arc needle into the other part of the object along the middle channel of the arc soft drill, removing the arc soft drill, and reserving the arc needle; placing the arc-shaped body of the arc-shaped screw into an object along the arc-shaped needle and a channel generated by the arc-shaped soft drill to reach a preset planning position, and removing the arc-shaped needle to reserve the arc-shaped body; selecting a proper fixing screw, mounting the fixing screw at the front end of a flexible screwdriver, advancing to the front end along the middle channel of the arc-shaped body together, and rotating the flexible screwdriver to fix the fixing screw in an object; the fixing needle penetrates out of the fixing hole of the arc screw along the tangential direction and is fixed in the object.
Description
Technical Field
The invention belongs to the field of split connection of broken objects, and relates to an arc screw imbedding method which is used for connecting irregularly broken objects suitable for arc screw connection.
Background
At present, straight screws are generally used for connecting broken objects, but arc screws are more suitable for repairing irregular objects, especially broken objects with a general arc shape.
As an example of an arcuate screw connection, the human pelvis is complex and irregular in structure, and existing straight screws do not perfectly fit the bony connection channel, even reducing the effective screw connection channel. The human pelvis structure tends to be arc-shaped, the arc-shaped screw is more suitable for the arc-shaped structure of the pelvis, and simultaneously, the screw channel is effectively increased, so that the safety of clinical operation is improved.
For this situation, as shown in fig. 1, curvaFix provides a solution for flexible arc screws, which has the advantage of very high flexibility in the feeding path, and has great difficulty in process manufacturability, complex kit and high cost due to its special structural design.
Therefore, there is an urgent need in the art for an arc screw insertion method that has a simple structure, a good fixing effect, and a low cost.
Disclosure of Invention
In order to solve the existing problems, the invention provides an arc screw imbedding method, wherein an arc channel is formed in an object to be connected by utilizing a soft drill with a sleeve, an arc screw with a fixed bending radius is selected to connect the spliced object, a fixing screw is assembled at the distal end of the arc screw, a fixing hole is formed on an arc body at the proximal end, and the fixing screw penetrates through the fixing hole to fix the proximal end.
According to an aspect of the present invention, there is provided a method of inserting an arc screw, the arc screw comprising: the arc-shaped body is of a hollow structure; the fixing screw is rotatably arranged at the far end of the arc-shaped body; the fixing hole is arranged at the proximal end of the arc-shaped body;
the implantation method comprises the following steps:
selecting a proper arc screw and a soft drill;
planning a nail feeding position of an arc screw at one end of the spliced object;
under the holding of the arc sleeve, the drill bit of the arc soft drill is stopped after moving to a planning position;
driving an arc needle into the other part of the object along the middle channel of the arc soft drill, removing the arc soft drill, and reserving the arc needle;
placing the arc-shaped body of the arc-shaped screw into an object along the arc-shaped needle and a channel generated by the arc-shaped soft drill to reach a preset planning position, and removing the arc-shaped needle to reserve the arc-shaped body;
selecting a proper fixing screw, mounting the fixing screw at the front end of a flexible screwdriver, advancing to the front end along the middle channel of the arc-shaped body together, and rotating the flexible screwdriver to fix the fixing screw in an object;
the fixing needle penetrates out of the fixing hole of the arc screw along the tangential direction and is fixed in the object.
Further, when the arc screw needs to be withdrawn, the fixing needle is firstly removed;
a flexible screwdriver is used for rotating along the middle channel of the arc-shaped body to unscrew the fixing screw;
and integrally taking out the arc-shaped body and the fixing screw.
Further, the drill bit of the arc-shaped soft drill is arranged outside the front end of the sleeve, the transmission shaft of the soft drill is positioned in the sleeve, the driving device of the soft drill is positioned outside the sleeve, and power is provided for the drill bit through the flexible transmission shaft.
Further, the outer diameter of the drill bit is larger than that of the arc-shaped body, the drill bit is of a hollow structure, and the drill bit is in an impeller shape.
Further, the radian of the sleeve is the same as that of the arc screw and the arc needle.
Further, the distal end of the arc-shaped body is provided with an opening, and the diameter of the opening is smaller than the hollow inner diameter of the arc-shaped body.
Further, a plurality of types of set screws are included, each set screw having a diameter that fits into the opening.
Further, the fixing screw is a self-tapping screw.
Further, the device comprises one or more fixing holes, wherein the fixing holes have different diameters, and different included angles are formed between the fixing holes and the tangent line of the arc-shaped body.
Further, the proximal end of the arc-shaped body is provided with a hammering end face.
The method of the invention can form an arc-shaped channel in the spliced object, and can connect the spliced object by using the arc-shaped screw with fixed bending radius. The arc screw has simple structure, simple and convenient placement method and good connection effect.
Drawings
The foregoing and other objects, features and advantages of the disclosure will be apparent from the following more particular descriptions of exemplary embodiments of the disclosure as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout exemplary embodiments of the disclosure.
Fig. 1 is a schematic view of the overall structure of a CurvaFix arc screw according to the prior art.
Fig. 2 is a schematic view of the structure of the arc-shaped soft drill and the k-wire according to the embodiment of the present invention.
Fig. 3 is a schematic view of the installation of an arc screw according to an embodiment of the present invention.
Fig. 4 is a schematic view of the installation of a set screw according to an embodiment of the present invention.
Fig. 5 is a sectional view of the installation of a set screw according to an embodiment of the present invention.
Fig. 6 is a cross-sectional view of an arc screw according to an embodiment of the present invention after fixation.
In the figure:
the arc-shaped soft drill 1, an arc-shaped needle 2, an arc-shaped body 3, a fixing screw 4, a flexible screwdriver 5, a fixing needle 6 and a fixing hole 7.
Detailed Description
Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The invention provides an arc screw implantation method, wherein the arc screw comprises the following steps: the arc-shaped body is of a hollow structure; the fixing screw is rotatably arranged at the far end of the arc-shaped body; the fixing hole is arranged at the proximal end of the arc-shaped body;
the method for inserting the arc screw comprises the following steps:
selecting a proper arc screw and a soft drill;
planning a nail feeding position of an arc screw at one end of the spliced object;
under the holding of the arc sleeve, the drill bit of the arc soft drill is stopped after moving to a planning position;
driving an arc needle into the other part of the object along the middle channel of the arc soft drill, removing the arc soft drill, and reserving the arc needle;
placing the arc-shaped body of the arc-shaped screw into an object along the arc-shaped needle and a channel generated by the arc-shaped soft drill to reach a preset planning position, and removing the arc-shaped needle to reserve the arc-shaped body;
selecting a proper fixing screw, mounting the fixing screw at the front end of a flexible screwdriver, advancing to the front end along the middle channel of the arc-shaped body together, and rotating the flexible screwdriver to fix the fixing screw in an object;
the fixing needle penetrates out of the fixing hole of the arc screw along the tangential direction and is fixed in the object.
Specifically, a series of arc screws with fixed bending radii can be designed and manufactured in advance, and different bending radii and lengths are suitable for different spliced objects. Alternatively, custom arc screws may be manufactured by 3D printing, depending on the size and shape of the objects to be joined.
Specifically, the arc body is hollow in the middle, the material can be stainless steel, the front end of the arc screw can be connected with a front end (far end) fixing screw, and a rear end (near end) is provided with a fixing needle channel for fixing the arc screw in place.
Specifically, the fixing screw is detachably arranged at the distal end of the arc-shaped body, one or more fixing holes are formed at the proximal end of the arc-shaped body at a preset angle. The distal end of the arc-shaped body is provided with an opening, and the diameter of the opening is smaller than the hollow inner diameter of the arc-shaped body. The diameter of the opening is also smaller than the diameter of the nut of the set screw.
Specifically, a plurality of types of fixing screws, each of which has a diameter adapted to the opening of the arc-shaped body, may be selected according to the condition of the split object. For example, set screws having different lengths, different pitches, or different leading ends may be selected. Preferably, the front end portion of the fixing screw is a self-tapping screw.
Preferably, the proximal end of the arcuate body may be provided with one or more securing holes. The plurality of fixing holes can have different diameters, and different included angles are formed between the plurality of fixing holes and the tangent line of the arc-shaped body. When the proximal end of the arc screw is fixed, a proper fixing needle can be selected to pass through a proper fixing hole according to the specific condition of an object and is placed into the object for fixing.
Preferably, the proximal end of the arcuate body is provided with a hammering end surface which is convenient to operate when placing or withdrawing the arcuate screw, and a hammer may be used to assist in feeding or withdrawing the screw.
The method for inserting the arc screw is particularly suitable for the situation that the straight screw is not suitable for connection, has good connection effect and can not cause the situation of exposed screw.
In order to facilitate understanding of the solution and the effects of the embodiments of the present invention, a specific application example is given below. It will be understood by those of ordinary skill in the art that the examples are for ease of understanding only and that any particular details thereof are not intended to limit the present invention in any way.
As shown in fig. 6, the arc screw of the present embodiment includes an arc body 3, a fixing screw 4, and a fixing hole 7. The arc body 3 is a hollow structure, in this embodiment, the inside of the arc body 3 has arc cylindrical holes with the same radian, and an arc needle can be placed therein. The distal end of the arcuate body 3 has an opening with a diameter smaller than the diameter of the inner arcuate cylindrical bore and smaller than the diameter of the nut of the set screw 4. The fixing screw can be placed to the far end along the arc cylindrical hole inside the arc body 3, the front end of the fixing screw 4 extends out of the opening, the nut is blocked by the opening, and the fixing screw 4 can be fixed in the object, so that the far end of the arc screw is fixed.
A fixing hole 7 is provided at the proximal end of the arc-shaped body 3, and in this embodiment the fixing hole 7 penetrates the side wall of the arc-shaped body 3, preferably along the tangential direction of the arc-shaped body 3. A fixation needle or a fixation pin may be inserted through the fixation hole 7 and fixed in the object, thereby fixing the proximal end of the arc screw.
The whole process of setting, fixing and removing the arc screw is described in detail with reference to fig. 2 to 6. The arc screw can finish nail placement and removal by means of reset planning of broken objects and the mechanical arm of the robot is used for holding and moving.
Firstly, planning and selecting arc screws: for the split situation of the crushed objects, the available arc-shaped channel is planned, and an arc-shaped screw with proper size and proper length and an optimal arc-shaped screw feeding position are recommended. The appropriate arc screw is selected from a series of arc screws with a fixed bending radius, which are designed and manufactured in advance, or the customized arc screw is manufactured by a 3D printing mode.
Next, a suitable soft drill is selected. A series of soft drills with sleeves can be designed in advance, the diameter of the drill bit at the front end slightly exceeds the diameter of the sleeve, the drill bit can freely rotate when being connected with the front end of the sleeve, the drill bit is connected with a flexible hollow shaft in the sleeve, and the tail end of the flexible hollow shaft is connected with power to drive the drill bit to rotate. The sleeve is of an arc-shaped hollow structure, and the radian of the sleeve is consistent with that of a pre-designed and manufactured arc-shaped screw. Specifically, each arc screw with a fixed bending radius is provided with a sleeve with the same radian, so that an arc channel with the same radian can be drilled, and the arc screw can be conveniently placed at the back.
Next, a nail setting process of performing an arc screw by a robot will be described:
1. selecting a proper arc screw according to the planning, wherein the selected parameters comprise the radian and the size of the arc screw, and then selecting a proper sleeve;
2. planning an arc screw feeding position, moving a holding front end tool by a mechanical arm, and positioning at the screw feeding position;
3. the mechanical arm holds the sleeve, the drill bit of the arc-shaped soft drill 1 is arranged at the front end of the sleeve, the transmission shaft of the soft drill is positioned in the sleeve, the driving device of the soft drill is positioned outside the sleeve, and power is provided for the drill bit through the flexible transmission shaft. The outer diameter of the soft drill bit is slightly larger than that of the arc-shaped body 3, and the soft drill bit is of a hollow structure, so that the drill bit is in an impeller shape and is convenient for guiding out residues. The mechanical arm holds the sleeve and the soft drill and stops after moving to a planning position, an arc needle 2 is driven into an object at the front end of the soft drill along the middle channel of the arc soft drill 1, the arc soft drill 1 is removed, and the arc needle 2 is reserved;
4. the arc-shaped body 3 of the arc-shaped screw enters along a channel generated by the arc-shaped needle 2 and the arc-shaped soft drill 1, and the arc-shaped body 3 is driven by the mechanical arm to reach an ideal planning position;
5. the mechanical arm moves back to remove the arc needle 2, and the arc body 3 is reserved.
6. Selecting a proper set screw 4, installing the set screw 4 at the front end of the flexible screwdriver 5, advancing to the front end along the middle channel of the arc-shaped body 3 together, rotating the T-shaped handle of the flexible screwdriver 5 clockwise, fixing the set screw 4 in an object, and removing the flexible screwdriver 5;
7. the fixing needle 6 enters along the tail of the arc-shaped body 3, the fixing needle 6 penetrates out of the fixing hole 7 of the arc-shaped screw along the tangential direction, and the fixing needle 6 is fixed in the object, so that the placement and the fixing of the arc-shaped screw are completed.
Next, the nail removing process is described:
firstly, removing the rear end fixing needle 6;
using a flexible screwdriver 5 to screw the front end fixing screw 4 along the middle channel of the arc-shaped body 3, and rotating the flexible screwdriver 5 anticlockwise to unscrew the front end fixing screw 4;
the arc-shaped body 3 and the front end fixing screw 4 are taken out integrally.
The arc screw insertion method of the invention can be used for the connection of fracture reduction, in particular to the connection after the reduction of pelvis fracture.
It will be appreciated by persons skilled in the art that the above description of embodiments of the invention has been given for the purpose of illustrating the benefits of embodiments of the invention only and is not intended to limit embodiments of the invention to any examples given.
The foregoing description of embodiments of the invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described.
Claims (10)
1. A method of installing an arc screw, the arc screw comprising: the arc-shaped body is of a hollow structure; the fixing screw is rotatably arranged at the far end of the arc-shaped body; the fixing hole is arranged at the proximal end of the arc-shaped body;
the implantation method comprises the following steps:
selecting a proper arc screw and a soft drill;
planning a nail feeding position of an arc screw at one end of the spliced object;
under the holding of the arc sleeve, the drill bit of the arc soft drill is stopped after moving to a planning position;
driving an arc needle into the other part of the object along the middle channel of the arc soft drill, removing the arc soft drill, and reserving the arc needle;
placing the arc-shaped body of the arc-shaped screw into an object along the arc-shaped needle and a channel generated by the arc-shaped soft drill to reach a preset planning position, and removing the arc-shaped needle to reserve the arc-shaped body;
selecting a proper fixing screw, mounting the fixing screw at the front end of a flexible screwdriver, advancing to the front end along the middle channel of the arc-shaped body together, and rotating the flexible screwdriver to fix the fixing screw in an object;
the fixing needle penetrates out of the fixing hole of the arc screw along the tangential direction and is fixed in the object.
2. The method of installing an arc screw of claim 1 wherein the fixation needle is first removed when withdrawal of the arc screw is desired;
a flexible screwdriver is used for rotating along the middle channel of the arc-shaped body to unscrew the fixing screw;
and integrally taking out the arc-shaped body and the fixing screw.
3. The method of claim 1, wherein the arcuate soft drill bit is external to the front end of the sleeve, the drive shaft of the soft drill is located within the sleeve, the drive means of the soft drill is located external to the sleeve, and the drive means of the soft drill is powered by the flexible drive shaft.
4. The method of claim 3, wherein the drill has a larger outer diameter than the arc body and is hollow, and the drill is impeller-shaped.
5. The method of claim 1, wherein the sleeve has an arc that is the same as the arc of the arc screw and the arc needle.
6. The method of claim 1, wherein the distal end of the arcuate body is provided with an opening having a diameter less than the hollow inner diameter of the arcuate body.
7. The method of installing an arc screw of claim 6 comprising a plurality of types of set screws, each set screw having a diameter that fits into the opening.
8. The method of claim 7, wherein the set screw is a self-tapping screw.
9. The method of claim 1, comprising one or more fixation holes having different diameters, the fixation holes having different angles with respect to a tangent line of the arcuate body.
10. The method of claim 1, wherein the proximal end of the arcuate body is provided with a hammering end surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311865060.5A CN117860365A (en) | 2023-12-29 | 2023-12-29 | Method for inserting arc screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311865060.5A CN117860365A (en) | 2023-12-29 | 2023-12-29 | Method for inserting arc screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117860365A true CN117860365A (en) | 2024-04-12 |
Family
ID=90580398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311865060.5A Pending CN117860365A (en) | 2023-12-29 | 2023-12-29 | Method for inserting arc screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117860365A (en) |
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2023
- 2023-12-29 CN CN202311865060.5A patent/CN117860365A/en active Pending
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