A method of implanting an arcuate screw

Abstract

The application provides a method for implanting an arc screw, which comprises the following steps: selecting a suitable arc screw and a soft drill; planning an implanting position of the arc screw at one end of a split object; stopping the drill bit of the arc soft drill under the holding of the arc sleeve after moving to the planned position; implanting an arc needle into another part of the object along the middle channel of the arc soft drill, removing the arc soft drill and reserving the arc needle; implanting the arc body of the arc screw into the object along the arc needle and the channel generated by the arc soft drill to reach the predetermined planned position, removing the arc needle and reserving the arc body; selecting a suitable fixing screw, installing the fixing screw at the front end of a flexible screwdriver, advancing together along the middle channel of the arc body to the front end, rotating the flexible screwdriver to fix the fixing screw in the object; and fixing a fixing needle in the object along the tangent direction through the fixing hole of the arc screw.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of splicing connection of broken objects, and relates to a method for implanting an arc screw for connecting irregular broken objects suitable for arc screw connection. BACKGROUND

[0002] At present, straight screws are usually used to connect broken objects, but arc screws are more suitable for repairing irregular objects, especially arc-shaped broken objects.

[0003] As an example suitable for arc screw connection, the existing straight screw cannot perfectly fit the connection channel and even reduces the effective screw connection channel. The broken object tends to be arc-shaped, and the arc screw is more suitable for the arc structure of the broken object, while effectively increasing the screw channel.

[0004] In view of this situation, as shown in the prior art, Figure 1 CurvaFix provides a solution of flexible arc screw, which has the advantage of very high flexibility of the screw path, and has great difficulty in process manufacturability, complex supporting tool box and high cost due to its special structure design.

[0005] Therefore, there is an urgent need in the art for an arc screw implantation method with simple structure, good fixing effect and low cost. SUMMARY

[0006] In order to solve the existing problems, the present application provides a method for implanting an arc screw, which uses a soft drill with a sleeve to form an arc-shaped channel in the object to be connected, selects an arc screw with a fixed bending radius to connect the spliced objects, and assembles a fixing screw at the distal end of the arc screw, and a fixing hole is formed on the arc body at the proximal end, and the fixing pin passes through the fixing hole to fix the proximal end.

[0007] According to one aspect of the present application, a method for implanting an arc screw is provided, the arc screw comprising: an arc body, the arc body being a hollow structure; a fixing screw rotatably arranged at the distal end of the arc body; a fixing hole arranged at the proximal end of the arc body;

[0008] The implantation method comprises:

[0009] selecting a suitable arc screw and a soft drill;

[0010] planning the screw insertion position of the arc screw at one end of the spliced object;

[0011] Under the holding of the arc sleeve, the drill bit of the arc soft drill is moved to the planned position and stopped;

[0012] The arc needle is punched along the middle channel of the arc soft drill to the other part of the object, the arc soft drill is removed, and the arc needle is reserved;

[0013] The arc-shaped body of the arc-shaped screw is inserted into the object along the arc-shaped needle and the channel generated by the arc-shaped soft drill to reach the predetermined planning position, and the arc-shaped needle is removed to reserve the arc-shaped body;

[0014] A suitable fixing screw is selected, the fixing screw is installed at the front end of the flexible screwdriver, and the flexible screwdriver is rotated to fix the fixing screw in the object along the middle channel of the arc-shaped body to the front end;

[0015] The fixing needle is fixed in the object along the tangential direction through the fixing hole of the arc-shaped screw.

[0016] Further, when the arc-shaped screw needs to be withdrawn, the fixing needle is removed first;

[0017] The flexible screwdriver is rotated along the middle channel of the arc-shaped body to loosen the fixing screw;

[0018] The arc-shaped body and the fixing screw are taken out as a whole.

[0019] Further, the drill bit of the arc-shaped soft drill is outside the front end of the sleeve, the transmission shaft of the soft drill is located in the sleeve, and the driving device of the soft drill is located outside the sleeve, and power is provided to the drill bit through the flexible transmission shaft.

[0020] Further, the outer diameter of the drill bit is larger than the outer diameter of the arc-shaped body, and the drill bit is a hollow structure and is in the form of an impeller.

[0021] Further, the arc of the sleeve is the same as the arc of the arc-shaped screw and the arc-shaped needle.

[0022] Further, the distal end of the arc-shaped body is provided with an opening, and the diameter of the opening is smaller than the inner diameter of the hollow of the arc-shaped body.

[0023] Further, a plurality of types of fixing screws are included, and the diameter of each type of fixing screw is matched with the opening.

[0024] Further, the fixing screw is a self-tapping screw.

[0025] Further, one or more fixing holes are included, the plurality of fixing holes have different diameters, and the plurality of fixing holes have different included angles with the tangent of the arc-shaped body.

[0026] Further, the proximal end of the arc-shaped body is provided with a hammering end face.

[0027] The method of the present application can form an arc-shaped channel in the spliced object, and the arc-shaped screw with a fixed bending radius can be used to connect the spliced object. The arc-shaped screw has a simple structure and is easy to insert, and has good connection effect. BRIEF DESCRIPTION OF DRAWINGS

[0028] The above and other objects, features and advantages of the present disclosure will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings, in which like reference characters refer to like parts throughout the figures, and in which:

[0029] Figure 1 is a schematic diagram of the overall structure of a CurvaFix arc screw according to the prior art.

[0030] Figure 2 is a schematic diagram of the structure of an arc-shaped soft drill and K-wire according to an embodiment of the present application.

[0031] Figure 3 is a schematic diagram of the installation of an arc screw according to an embodiment of the present application.

[0032] Figure 4 is a schematic diagram of the installation of a fixation screw according to an embodiment of the present application.

[0033] Figure 5 is a cross-sectional view of the installation of a fixation screw according to an embodiment of the present application.

[0034] Figure 6 is a cross-sectional view of the fixation of an arc screw according to an embodiment of the present application.

[0035] In the drawings:

[0036] Arc-shaped soft drill 1, arc-shaped needle 2, arc-shaped body 3, fixation screw 4, flexible screwdriver 5, fixation needle 6, fixation hole 7. DETAILED DESCRIPTION

[0037] Preferred embodiments of the present disclosure will be described herein below with reference to the accompanying drawings. While preferred embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be implemented in various forms and should not be limited by 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 present disclosure to those skilled in the art.

[0038] The present application provides a method for inserting an arc screw, wherein the arc screw comprises: an arc-shaped body, which is a hollow structure; a fixation screw, which is rotatably disposed at a distal end of the arc-shaped body; a fixation hole, which is disposed at a proximal end of the arc-shaped body;

[0039] The method for inserting the arc screw comprises:

[0040] Selecting a suitable arc screw and soft drill;

[0041] Planning the entry position of the arc screw at one end of the spliced object;

[0042] The drill bit of the arc-shaped soft drill is moved to the planned position under the holding of the arc-shaped sleeve and then stopped;

[0043] The arc-shaped needle is driven along the middle channel of the arc-shaped soft drill to another part of the object, the arc-shaped soft drill is removed, and the arc-shaped needle is left;

[0044] The arc-shaped body of the arc-shaped screw is placed in the object along the channel formed by the arc-shaped needle and the arc-shaped soft drill to a predetermined planned position, and the arc-shaped needle is removed and the arc-shaped body is left;

[0045] A suitable fixing screw is selected, the fixing screw is installed at the front end of the flexible screwdriver, and the flexible screwdriver is rotated to fix the fixing screw in the object along the middle channel of the arc-shaped body to the front end;

[0046] The fixing needle is driven along the tangential direction to pass through the fixing hole of the arc-shaped screw and is fixed in the object.

[0047] Specifically, a series of arc-shaped 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, a customized arc-shaped screw can be manufactured by 3D printing according to the size and shape of the object to be connected.

[0048] Specifically, the arc-shaped body is hollow in the middle, and the material can be stainless steel. The front end of the arc-shaped screw can be connected to the front (distal) end fixing screw, and the rear end (proximal) end is pre-provided with a fixing needle channel for fixing the arc-shaped screw placed in position.

[0049] Specifically, the fixing screw is detachably arranged at the distal end of the arc-shaped body, and the fixing hole is one or more and is arranged at the proximal end of the arc-shaped body at a predetermined angle. The distal end of the arc-shaped body is provided with an opening, and the diameter of the opening is smaller than the inner diameter of the hollow of the arc-shaped body. The diameter of the opening is also smaller than the diameter of the screw cap of the fixing screw.

[0050] Specifically, a plurality of types of fixing screws can be selected for use according to the situation of the spliced object, and the diameter of each fixing screw is matched with the opening of the arc-shaped body. For example, fixing screws with different lengths, different pitches, or different front end portions can be selected. Preferably, the front end portion of the fixing screw is a self-tapping screw.

[0051] Preferably, the proximal end of the arc-shaped body can be provided with one or more fixing holes. The plurality of fixing holes can have different diameters, and the plurality of fixing holes have different included angles with the tangent line of the arc-shaped body. When fixing the proximal end of the arc-shaped screw, a suitable fixing needle can be selected to pass through a suitable fixing hole and be placed into the object for fixation according to the specific situation of the object.

[0052] Preferably, the proximal end of the arc-shaped body is provided with a hammering end surface, which facilitates operation when placing or removing the arc-shaped screw, and a hammer can be used to assist in driving or removing the screw.

[0053] The implantation method of the arc-shaped screw is particularly suitable for the case where the straight screw connection is not suitable, has good connection effect, and does not appear the exposed screw condition.

[0054] In order to understand the scheme and effect of the embodiments of the present application, a specific application example is given below. Those skilled in the art should understand that the example is only for the convenience of understanding the present application, and any specific details thereof are not intended to limit the present application in any way.

[0055] As shown in Figure 6 The arc-shaped body 3 is a hollow structure, and in the embodiment, the arc-shaped body 3 has an arc-shaped cylindrical hole with the same arc in the inside, in which the arc-shaped needle can be placed. The distal end of the arc-shaped body 3 has an opening, the diameter of which is smaller than the diameter of the internal arc-shaped cylindrical hole and also smaller than the diameter of the screw cap of the fixed screw 4. The fixed screw can be placed along the arc-shaped cylindrical hole inside the arc-shaped body 3 to the distal end, and the front end of the fixed screw 4 extends from the opening, and the screw cap is blocked by the opening. The fixed screw 4 can be fixed in the object, so as to fix the distal end of the arc-shaped screw.

[0056] The fixed hole 7 is arranged at the proximal end of the arc-shaped body 3, and in the embodiment, the fixed hole 7 penetrates the side wall of the arc-shaped body 3, preferably along the tangent direction of the arc-shaped body 3. The fixed needle or the fixed pin can be used to penetrate the fixed hole 7 and be fixed in the object, so as to fix the proximal end of the arc-shaped screw.

[0057] Referring to Figures 2-6 The embodiment describes the whole process of the implantation, fixation and removal of the arc-shaped screw. The arc-shaped screw of the present application can be implanted and removed by means of the reset planning of the broken object, and the mechanical arm of the robot is held and moved.

[0058] Firstly, the planning and selection of the arc-shaped screw are performed: for the splicing condition of the broken object, the available arc-shaped channel is planned, the suitable arc-shaped screw with suitable size and suitable length is recommended, and the best arc-shaped screw implantation position is recommended. The suitable arc-shaped screw is selected from a series of arc-shaped screws with fixed bending radius designed and manufactured in advance, or the customized arc-shaped screw is manufactured by 3D printing.

[0059] Next, select the appropriate soft drill. A series of sleeve soft drills can be designed in advance, the front end of the drill is slightly larger than the diameter of the sleeve, the drill is connected with the front end of the sleeve and can rotate freely, the drill is connected with the flexible hollow shaft inside the sleeve, the flexible hollow shaft tail is connected with the power, and the drill is driven to rotate. The sleeve is an arc hollow structure, and the curvature of the sleeve is consistent with the arc screw designed and manufactured in advance. Specifically, each arc screw with a fixed bending radius is equipped with a sleeve with the same curvature, so that an arc channel with the same curvature can be drilled, which is convenient for the subsequent placement of the arc screw.

[0060] Next, the process of placing the arc screw by the robot is described:

[0061] 1. Select the appropriate arc screw according to the plan, the parameters include the curvature and size of the arc screw, and then select the appropriate sleeve;

[0062] 2. Plan the screw insertion position of the arc screw, and move the mechanical arm to hold the front end tool and position at the screw insertion position;

[0063] 3. The mechanical arm holds the sleeve, the drill bit of the arc soft drill 1 is at the front end of the sleeve, the transmission shaft of the soft drill is located inside the sleeve, and the driving device of the soft drill is located outside the sleeve, which provides power to the drill bit through the flexible transmission shaft. The outer diameter of the drill bit is slightly larger than the outer diameter of the arc body 3, and it is a hollow structure, and the drill bit is a impeller shape for convenient residue removal. After the mechanical arm holds the sleeve and the soft drill moves to the planned position, it stops, and the arc needle 2 is punched into the object in front 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 retained;

[0064] 4. The arc body 3 of the arc screw is inserted along the channel generated by the arc needle 2 and the arc soft drill 1, and the arc body 3 reaches the ideal planned position under the driving of the mechanical arm;

[0065] 5. The mechanical arm moves backward to remove the arc needle 2, and the arc body 3 is retained.

[0066] 6. Select the appropriate fixed screw 4, install the fixed screw 4 at the front end of the flexible screwdriver 5, and advance together along the middle channel of the arc body 3 to the front end, rotate the T-shaped handle of the flexible screwdriver 5 clockwise, fix the fixed screw 4 in the object, and remove the flexible screwdriver 5;

[0067] 7. Insert the fixed needle 6 along the tail of the arc body 3, the fixed needle 6 penetrates out of the fixed hole 7 of the arc screw along the tangent direction, and the fixed needle 6 is fixed in the object, thereby completing the placement and fixation of the arc screw.

[0068] Next, the process of removing the screw is described:

[0069] First, remove the rear fixed needle 6;

[0070] The flexible screwdriver 5 is used to loosen the front end fixing screw 4 along the middle channel of the arc-shaped body 3 to the front end fixing screw 4, and the flexible screwdriver 5 is rotated counterclockwise to loosen the front end fixing screw 4;

[0071] The arc-shaped body 3 and the front end fixing screw 4 are taken out as a whole.

[0072] It will be understood by those skilled in the art that the above description of the embodiments of the present application is for the purpose of exemplarily illustrating the beneficial effects of the embodiments of the present application, and is not intended to limit the embodiments of the present application to any of the examples given.

[0073] The above has described the embodiments of the present application, the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A method of implanting an arcuate screw, characterized in that, The arc screw comprises an arc body which is a hollow structure, a fixing screw rotatably arranged at a distal end of the arc body, and a fixing hole arranged at a proximal end of the arc body. The implantation method comprises: selecting a suitable arc screw and a soft drill; planning a screw insertion position of the arc screw at one end of the spliced object; stopping the drill bit of the arc soft drill after moving to the planned position under the holding of the arc sleeve; inserting the arc needle along the middle channel of the arc soft drill to the other part of the object, removing the arc soft drill and retaining the arc needle; placing the arc body of the arc screw into the object along the channel generated by the arc needle and the arc soft drill to the predetermined planned position, removing the arc needle and retaining the arc body; selecting a suitable fixing screw, installing the fixing screw at the front end of the flexible screwdriver, and advancing together along the middle channel of the arc body to the front end, rotating the flexible screwdriver to fix the fixing screw in the object; fixing the fixing needle in the object along the tangential direction through the fixing hole of the arc screw; The object does not include a living human or animal body. The distal end of the arc body is provided with an opening, and the diameter of the opening is smaller than the inner diameter of the hollow arc body. The fixing screw is placed in the arc cylindrical hole inside the arc body to the distal end, and the front end of the fixing screw protrudes from the opening, and the nut is blocked by the opening.

2. The method of implanting an arcuate screw according to claim 1, wherein, When the arc screw needs to be removed, the fixing needle is removed first; the fixing screw is loosened by rotating the flexible screwdriver along the middle channel of the arc body; the arc body and the fixing screw are taken out as a whole.

3. The method of implanting an arcuate screw according to claim 1, wherein, The drill bit of the arc soft drill is outside the front end of the sleeve, the transmission shaft of the soft drill is located in the sleeve, and the driving device of the soft drill is located outside the sleeve, and power is provided to the drill bit through the flexible transmission shaft.

4. The method of implanting an arcuate screw according to claim 3, wherein, The outer diameter of the drill bit is larger than the outer diameter of the arc body, and the drill bit is a hollow structure and a impeller.

5. The method of implanting an arcuate screw of claim 1, wherein, The curvature of the sleeve is the same as the curvature of the arc screw and the arc needle.

6. The method of implanting an arcuate screw according to claim 1, wherein, The fixing screw includes a plurality of types, and the diameter of each type is matched with the opening.

7. The method of implanting an arcuate screw according to claim 6, wherein, The fixing screw is a self-tapping screw.

8. The method of implanting an arcuate screw according to claim 1, wherein, The arc body is provided with a plurality of fixing holes having different diameters and different included angles between the plurality of fixing holes and the tangent line of the arc body.

9. The method of implanting an arcuate screw according to claim 1, wherein, The proximal end of the arc body is provided with a hammering end face.

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