A design method for variable-section root canal file

Abstract

The present invention relates to a method for designing a variable-section root canal file, comprising: constructing a starting base circle and a terminating base circle, and determining a starting section in the starting base circle, and determining a terminating section in the terminating base circle; determining a corresponding terminating point of any starting point in the starting section in the terminating section; determining construction parameters according to design requirements; obtaining a spiral line from any starting point to the corresponding terminating point according to the construction parameters; obtaining a variable-section root canal file according to the spiral line from any starting point to the corresponding terminating point. The beneficial effect of the present invention is that the present invention allows the design of a variable-section root canal file with different requirements to be achieved by adjusting the design parameters. This high degree of flexibility and customizability enables the present invention to design the most suitable root canal file for different types of complex root canals, thereby improving the success rate of treatment.

Description

Technical Field

[0001] The invention relates to the technical field of root canal files, and more specifically, to a design method for a root canal file with a variable cross-section. Background Art

[0002] Root canal files are mainly used to treat common oral diseases such as pulp disease and periapical periodontitis, and are the core instruments for root canal preparation. Due to the fixed taper and cross-sectional shape of the single needle, traditional root canal files are prone to the "screwing-in" effect of the thread, excessive cutting of the inner wall of the root canal, difficulty in flushing, and easy breakage during use. For a single root canal file needle, combining root canal files with different cross-sectional shapes along the axial direction can not only ensure high cutting efficiency, but also reduce the amount of center steel, obtain better elasticity, and increase the ability to remove dentin debris. The cross-sectional shape of a single root canal file needle along the axial direction needs to change smoothly to eliminate the step surface and side penetration of the root canal caused by the sudden change of the cross-sectional shape, but there is currently no description of the design method for smooth change of cross-sectional shape. Summary of the invention

[0003] The purpose of the present invention is to address the deficiencies of the prior art and to propose a design method for a variable-section root canal file.

[0004] In a first aspect, a method for designing a variable-section root canal file is provided, comprising:

[0005] Step 1: construct a starting base circle and a terminating base circle, and determine a starting section in the starting base circle and a terminating section in the terminating base circle; project the terminating section into the starting section to ensure that the centers of the base circles where the two sectional shapes are located coincide with each other;

[0006] Step 2: Determine any starting point in the starting section At the corresponding end point of the end section ;

[0007] Step 3: Determine the construction parameters according to the design requirements; the construction parameters include the starting angle of the spiral line , starting point of the spiral Corresponding radius in the starting section , the end point of the spiral Corresponding radius in the end section , helix axial starting coordinate and the helix axial end coordinates ;

[0008] Step 4: Obtain any starting point according to the construction parameters To the corresponding end point A spiral line; according to any starting point To the corresponding end point The spiral line is used to obtain a variable-section root canal file.

[0009] Preferably, step 3 comprises:

[0010] Step 3.1: Construct a three-dimensional rectangular coordinate system and use the straight line connecting the center of the starting base circle and the center of the ending base circle as Axis axis;

[0011] Step 3.2: Determine the starting angle of the spiral , the starting angle of the helix Starting point After connecting with the center of the starting base circle The angle between the positive half axis and the helix; determine the starting point of the helix Corresponding radius in the starting section and the end point of the spiral Corresponding radius in the end section ; Determine the axial starting coordinate of the helix , helix axial end coordinate .

[0012] Preferably, in step 4, obtaining any starting point To the corresponding end point The spiral line includes:

[0013] Describe the parametric equation from the starting point Move to the end point In process , , The change of coordinates is expressed as:

[0014]

[0015] in,( , , ) describes the coordinates of the helix’s motion path, The angle of rotation of the helix.

[0016] As a preference, it also includes:

[0017] Step 5: Adjust the design parameters to achieve the design of variable-section root canal files with different requirements.

[0018] Preferably, step 5 comprises:

[0019] Step 5.1, change the initial section shape and the final section shape;

[0020] Step 5.2: Change the radius of the starting base circle and the end base circle radius ;

[0021] Step 5.3: Change the axial starting coordinate and the axial end coordinates .

[0022] In a second aspect, a variable-section root canal file obtained by any method described in the first aspect is provided.

[0023] In a third aspect, a variable-section root canal file design system is provided, which is used to execute any of the methods described in the first aspect, including:

[0024] A construction module is used to construct a starting base circle and a terminating base circle, and determine a starting section in the starting base circle and a terminating section in the terminating base circle; the terminating section is projected into the starting section to ensure that the centers of the base circles where the two sectional shapes are located coincide with each other;

[0025] The first determination module is used to determine any starting point in the starting section At the corresponding end point of the end section ;

[0026] The second determination module is used to determine the construction parameters according to the design requirements; the construction parameters include the starting angle of the spiral line , starting point of the spiral Corresponding radius in the starting section , the end point of the spiral Corresponding radius in the end section , helix axial starting coordinate and the helix axial end coordinates ;

[0027] The acquisition module is used to obtain any starting point according to the construction parameters. To the corresponding end point A spiral line; according to any starting point To the corresponding end point The spiral line is used to obtain a variable-section root canal file.

[0028] According to a fourth aspect, a computer storage medium is provided, wherein a computer program is stored in the computer storage medium; when the computer program is executed on a computer, the computer executes any method described in the first aspect.

[0029] The beneficial effects of the present invention are:

[0030] 1. The present invention allows the design of variable-section root canal files with different requirements to be achieved by adjusting design parameters. This high degree of flexibility and customizability enables the present invention to design the most suitable root canal files for different types of complex root canals, thereby improving the success rate of treatment.

[0031] 2. The invention accurately calculates the structural parameters of the spiral line, such as the spiral line starting angle, radius and axial coordinates, etc. The variable cross-section root canal file designed by this method is more reasonable in structure, can evenly withstand various forces during the treatment process, and effectively reduces the risk of the instrument breaking in the root canal. This not only protects the safety of the patient, but also reduces the interruption of treatment and additional costs caused by instrument damage.

[0032] 3. The present invention constructs the starting base circle and the ending base circle, and accurately determines the corresponding relationship between the starting section and the ending section. This method can design a variable-section root canal file that is highly matched with the actual shape of the root canal. This personalized design ensures the accurate guidance and penetration of the root canal file in the root canal, reduces the difficulty and error of treatment caused by shape mismatch, and improves the accuracy of treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A flow chart of a method for designing a variable-section root canal file;

[0034] Figure 2 It is a schematic diagram of the alignment of the center of the base circle of the cross-section of the variable-section root canal file before and after deformation;

[0035] Figure 3 Establish a schematic diagram of the coordinate system in the design method of variable-section root canal files;

[0036] Figure 4a It is a spiral trajectory diagram;

[0037] Figure 4b Another spiral trajectory diagram;

[0038] Figure 5 This is an example diagram of a spiral line of a variable-section root canal file;

[0039] Figure 6a It is a lateral three-dimensional structural diagram of a variable-section root canal file;

[0040] Figure 6b It is a lateral three-dimensional structural diagram of another variable-section root canal file;

[0041] Figure 7a A three-dimensional diagram of an integral root canal file that realizes variable cross-section;

[0042] Figure 7b A three-dimensional diagram of another integral root canal file that realizes variable cross-section;

[0043] Figure 8 The schematic diagram of the structure of a variable-section root canal file design system is shown in FIG. DETAILED DESCRIPTION

[0044] The present invention is further described below in conjunction with embodiments. The description of the following embodiments is only used to help understand the present invention. It should be noted that for ordinary persons in the art, without departing from the principle of the present invention, the present invention can also be modified in some ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0045] Embodiment 1:

[0046] Embodiment 1 of the present application provides a method for designing a variable-section root canal file, comprising:

[0047] Step 1: construct a starting base circle and an ending base circle, and determine a starting section in the starting base circle and a ending section in the ending base circle; project the ending section into the starting section, such as Figure 2 As shown, ensure that the centers of the base circles of the two cross-sectional shapes coincide.

[0048] Specifically, the starting base circle and the ending base circle are the circumscribed circles of the starting section and the ending section, respectively. The starting section and the ending section can be of any shape, determined according to actual needs. For example, Figure 6a As shown, the starting cross section can be a flat triangle, such as Figure 6b As shown, the terminal section is a convex triangle.

[0049] Step 2: Determine any starting point in the starting section At the corresponding end point of the end section .

[0050] Specifically, when the terminal section is projected onto the starting section, the base circle centers of the starting base circle and the terminal base circle coincide with each other, and the center and the starting point are connected. , the center and the starting point The intersection of the line connecting the two ends of the section is the starting point. At the corresponding end point of the end section .

[0051] Step 3: Determine the construction parameters according to the design requirements; the construction parameters include the starting angle of the spiral line , starting point of the spiral Corresponding radius in the starting section , the end point of the spiral Corresponding radius in the end section , helix axial starting coordinate and the helix axial end coordinates .

[0052] Step 3 includes:

[0053] Step 3.1: Figure 3As shown, a three-dimensional rectangular coordinate system is constructed, and the straight line connecting the center of the starting base circle and the center of the ending base circle is taken as Axis axis;

[0054] Step 3.2: Determine the starting angle of the spiral , the starting angle of the helix Starting point After connecting with the center of the starting base circle The angle between the positive half axis and the helix; determine the starting point of the helix Corresponding radius in the starting section and the end point of the spiral Corresponding radius in the end section ; Determine the axial starting coordinate of the helix , helix axial end coordinate .

[0055] The starting point of the spiral Corresponding radius in the starting section Starting point Distance to the center of the starting base circle, end point of the spiral Corresponding radius in the end section End point The distance to the center of the ending base circle.

[0056] Step 4: Figure 4a and Figure 4b As shown, according to the construction parameters, any starting point is obtained To the corresponding end point A spiral line; according to any starting point To the corresponding end point The spiral line is used to obtain a variable-section root canal file.

[0057] It should be noted that the intermediate process of the deformation of the two cross sections is gradual, and the entire process is achieved by deforming the starting cross section by one pitch. In addition, the movement of the helix can be described by the change of radius, angle and axial coordinate. Move to the end point It can be regarded as a process in which a point rotates and rises along a certain taper. The total angle that the point needs to rotate to complete the complete deformation of the cross-sectional shape is , so the rotation angle It can describe the point relative to the starting point of the spiral Since the movement is completed gradually, it can be considered that the change of each parameter used to describe the spiral shape is equal to the rate of change of the rotation angle. Among them, the rate of change of the rotation angle is .

[0058] Then, in step 4, the acquisition of any starting point To the corresponding end point The spiral line includes:

[0059] Describe the parametric equation from the starting point Move to the end point In process , , The change of coordinates is expressed as:

[0060]

[0061] in,( , , ) describes the coordinates of the helix’s motion path, The angle of rotation of the helix.

[0062] It should be noted that the realization of the variable cross-section root canal file is to rotate the initial cross-section along the central axis, move forward, and change the distance of each point to the axis. Therefore, the method proposed in this application is to use a parametric method to describe the spiral trajectory when any point on the starting cross-section is deformed to the corresponding point of the ending cross-section, thereby realizing the design of the variable cross-section root canal file. Figure 7a and Figure 7b As shown, the present application designs a variable-section root canal file having a flat triangle starting section and a convex triangle ending section according to the spiral trajectory when any point on the starting section is deformed to the corresponding point of the ending section.

[0063] Embodiment 2:

[0064] Based on Example 1, Example 2 of the present application provides a more specific design method for a variable cross-section root canal file, such as Figure 1 As shown, including:

[0065] Step 1: construct a starting base circle and a terminating base circle, and determine a starting section in the starting base circle and a terminating section in the terminating base circle; project the terminating section into the starting section to ensure that the centers of the base circles where the two sectional shapes are located coincide with each other;

[0066] Step 2: Determine any starting point in the starting section At the corresponding end point of the end section ;

[0067] Step 3: Determine the construction parameters according to the design requirements; the construction parameters include the starting angle of the spiral line , starting point of the spiral Corresponding radius in the starting section , the end point of the spiral Corresponding radius in the end section , helix axial starting coordinate and the helix axial end coordinates ;

[0068] Step 4: Obtain any starting point according to the construction parameters To the corresponding end point A spiral line; according to any starting point To the corresponding end point The spiral line is used to obtain a variable-section root canal file.

[0069] Step 5: Adjust the design parameters to achieve the design of variable-section root canal files with different requirements.

[0070] Step 5 includes:

[0071] Step 5.1, change the initial section shape and the final section shape;

[0072] Step 5.2: Change the radius of the starting base circle and the end base circle radius ;

[0073] Step 5.3: Change the axial starting coordinate and the axial end coordinates .

[0074] For example, the construction parameters are given as follows: the base circle radius of the starting section , the base circle radius of the end section , helix starting angle , helix axial starting coordinate , helix axial end coordinate Based on this example, we can draw the following spiral motion trajectory equation: Figure 5 The spiral line shown.

[0075] The present invention can achieve designs with different cross-section changes by adjusting design parameters, and can realize smooth changes in the cross-section of the root canal file to adapt to different design requirements, providing ideas for the design and structural optimization of variable-section root canal files to meet the diverse needs of clinical treatment.

[0076] It should be noted that the parts in this embodiment that are the same or similar to those in Embodiment 1 can be referenced to each other and will not be described in detail in this application.

[0077] Embodiment 3:

[0078] On the basis of Examples 1 and 2, Figure 8 As shown, Embodiment 3 of the present application provides a variable-section root canal file design system, comprising:

[0079] A construction module is used to construct a starting base circle and a terminating base circle, and determine a starting section in the starting base circle and a terminating section in the terminating base circle; the terminating section is projected into the starting section to ensure that the centers of the base circles where the two sectional shapes are located coincide with each other;

[0080] The first determination module is used to determine any starting point in the starting section At the corresponding end point of the end section ;

[0081] The second determination module is used to determine the construction parameters according to the design requirements; the construction parameters include the starting angle of the spiral line , starting point of the spiral Corresponding radius in the starting section , the end point of the spiral Corresponding radius in the end section , helix axial starting coordinate and the helix axial end coordinates ;

[0082] The acquisition module is used to obtain any starting point according to the construction parameters. To the corresponding end point A spiral line; according to any starting point To the corresponding end point The spiral line is used to obtain a variable-section root canal file.

[0083] Specifically, the system provided in this embodiment is a system corresponding to the method provided in Embodiments 1 and 2. Therefore, the parts in this embodiment that are the same or similar to Embodiments 1 and 2 can be referenced to each other and will not be repeated in this application.

Claims

1. A method for designing a variable-section root canal file, characterized in that: include: Step 1: construct a starting base circle and a terminating base circle, and determine a starting section in the starting base circle and a terminating section in the terminating base circle; project the terminating section into the starting section to ensure that the centers of the base circles where the two sectional shapes are located coincide with each other; Step 2: Determine any starting point in the starting section At the corresponding end point of the end section ; Step 3: Determine the construction parameters according to the design requirements; the construction parameters include the starting angle of the spiral line , starting point of the spiral Corresponding radius in the starting section , the end point of the spiral Corresponding radius in the end section , helix axial starting coordinate and the helix axial end coordinates ; Step 4: Obtain any starting point according to the construction parameters To the corresponding end point A spiral line; according to any starting point To the corresponding end point The spiral line is used to obtain a variable-section root canal file.

2. The method for designing a variable cross-section root canal file according to claim 1, characterized in that: Step 3 includes: Step 3.1: Construct a three-dimensional rectangular coordinate system and use the straight line connecting the center of the starting base circle and the center of the ending base circle as Axis axis; Step 3.2: Determine the starting angle of the spiral , the starting angle of the helix Starting point After connecting with the center of the starting base circle The angle between the positive half axis and the helix; determine the starting point of the helix Corresponding radius in the starting section and the end point of the spiral Corresponding radius in the end section ; Determine the axial starting coordinate of the helix , helix axial end coordinate .

3. The method for designing a variable cross-section root canal file according to claim 2, characterized in that: In step 4, the acquisition of any starting point To the corresponding end point The spiral line includes: Describe the parametric equation from the starting point Move to the end point In process , , The change of coordinates is expressed as: ； in,( , , ) describes the coordinates of the helix’s motion path, The angle of rotation of the helix.

4. The method for designing a variable cross-section root canal file according to claim 3, characterized in that: Also includes: Step 5: Adjust the design parameters to achieve the design of variable-section root canal files with different requirements.

5. The method for designing a variable cross-section root canal file according to claim 4, characterized in that: Step 5 includes: Step 5.1, change the initial section shape and the final section shape; Step 5.2: Change the radius of the starting base circle and the end base circle radius ; Step 5.3: Change the axial starting coordinate and the axial end coordinates .

6. A root canal file with a variable cross-section obtained by the method according to any one of claims 1 to 5.

7. A variable-section root canal file design system, characterized in that: The method for executing any one of claims 1 to 5 comprises: A construction module is used to construct a starting base circle and a terminating base circle, and determine a starting section in the starting base circle and a terminating section in the terminating base circle; the terminating section is projected into the starting section to ensure that the centers of the base circles where the two sectional shapes are located coincide with each other; The first determination module is used to determine any starting point in the starting section At the corresponding end point of the end section ; The second determination module is used to determine the construction parameters according to the design requirements; the construction parameters include the starting angle of the spiral line , starting point of the spiral Corresponding radius in the starting section , the end point of the spiral Corresponding radius in the end section , helix axial starting coordinate and the helix axial end coordinates ; The acquisition module is used to obtain any starting point according to the construction parameters. To the corresponding end point A spiral line; according to any starting point To the corresponding end point The spiral line is used to obtain a variable-section root canal file.

8. A computer storage medium, characterized in that: The computer storage medium stores a computer program; when the computer program is executed on a computer, the computer executes any one of the methods described in claims 1 to 5.

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