Reinforcing rib automatic generation method, system, program, medium and device based on initial undercut form

Abstract

The invention relates to an automatic reinforcing rib generation method based on an initial undercut form. The method comprises the following steps that S1, control curves of the two sides of an undercut are obtained; s2, acquiring undercut control points according to the undercut control curve; s3, a reinforcing rib control point is obtained according to the undercut control point; s4, constructing an undercut reinforcing rib according to the selected reinforcing rib control points; and S5, sequentially obtaining the whole tooth jaw model added with the undercut reinforcing ribs according to the steps S1 to S4. According to the method, the position change can be performed according to the initial automatic undercut form and the tooth characteristics to automatically generate the reinforcing ribs, so that the breakage of the tooth socket model can be reduced to a great extent, and meanwhile, the consumption of manpower and material resources can be greatly reduced.

Description

Technical Field

[0001] The present invention relates to the field of orthodontic technology, and in particular to a method, system, program, medium and device for automatically generating reinforcing ribs based on an initial undercut shape. Background Art

[0002] In traditional orthodontic treatment, the braces need to be firmly attached to the tooth surface to achieve tooth movement and correction. Tooth undercut reinforcement ribs can increase the mechanical fit between the braces and the teeth, improve the retention ability of the braces, and make it less likely to fall off or shift in the complex environment of the oral cavity. For example, in the design of self-ligating brackets, adding undercut reinforcement rib structures can make the brackets better fixed on the teeth, ensuring that the dental arch wire can stably play a corrective role, thereby improving the effect and efficiency of orthodontic treatment. For some patients with irregular tooth morphology, high surface smoothness, or tooth defects, undercut reinforcement ribs can provide additional retention support to ensure the smooth progress of orthodontic treatment.

[0003] Currently, in most orthodontic processes, the methods for automatically generating undercut reinforcement ribs are relatively simple and cannot adapt to the different tooth shapes of each patient. Manual adjustments may cost a lot of manpower and material resources.

[0004] Therefore, it is particularly important to design an automatic rib generation method that can change the position according to the shape of the initial automatic undercut and tooth characteristics. Summary of the invention

[0005] The technical problem to be solved by the present invention is to design a method, system, program, medium and device for automatically generating reinforcing ribs based on the initial concave shape, which can effectively reduce the breakage of the orthodontic appliance, greatly save the consumption of manpower and material resources, and thus solve the existing technical problems.

[0006] In order to solve the above technical problems, the present invention provides a method for automatically generating reinforcing ribs based on the initial undercut shape, comprising the following steps: Step S1: Obtain control curves on both sides of the undercut.

[0007] Step S2: Obtaining undercut control points according to the undercut control curve.

[0008] Step S3: Obtain the rib control point according to the undercut control point, divide the control points on both sides into two parts according to the buccal and lingual sides, and take one control point at the top of the left and right sides of the buccal and lingual sides as the initial position for constructing the undercut rib. The specific method is as follows: According to the control points obtained in step S2, the curve is divided into two parts, buccal and lingual, according to the buccal and lingual directions of the teeth; Obtain the local coordinate system of the undercut, move the coordinate origin along the Z-axis direction (tooth growth direction) to the top of the undercut, and then move the moved point buccolingually by 0.3 to 0.5 times the buccolingual width of the undercut to obtain the corresponding reinforcing rib control points on the buccolingual side.

[0009] Step S4: constructing an undercut stiffener according to the selected stiffener control points.

[0010] Step S5: According to steps S1 to S4, the entire jaw model with undercut reinforcement ribs added is obtained in sequence.

[0011] Furthermore, in step S2, adjacent left and right control points of the undercut are obtained, which are the intersection points of the teeth and the two sides of the undercut, that is, the undercut grid is intersected with the left and right teeth to obtain a circle of intersection lines, and points are evenly sampled on the obtained intersection lines on both sides.

[0012] Furthermore, in step S3, the position of the control point is adjusted according to different tooth positions and gaps, specifically: If there are gap teeth, regardless of the anterior and posterior teeth, two control points are taken on the buccal and lingual sides to construct the undercut reinforcement ribs; If there are no gap teeth, for the front teeth, regardless of the buccal and lingual directions, only one control point is taken on the left and right sides. For the back teeth, two control points are taken as the control points of the undercut reinforcement rib.

[0013] Furthermore, in step S4, the specific method for constructing the undercut reinforcement rib is: constructing a cylindrical point set with the selected control point as the center of the bottom circle, and constructing a cylindrical mesh based on the set of cylindrical points.

[0014] Furthermore, the radius of the cylindrical point set is 0.3 mm to 0.5 mm, and the length is the distance between two corresponding rib control points.

[0015] The present invention also provides a reinforcing rib automatic generation system based on the initial undercut shape, comprising: An undercut control point acquisition module is used to acquire adjacent left and right control points of the undercut according to the undercut control curve; A rib control point acquisition module, used to acquire rib control points according to undercut control points; A rib construction module, used to construct undercut ribs according to selected rib control points; The control module is used to control the undercut control point acquisition module, the rib control point acquisition module and the rib construction module to realize the module functions according to the aforementioned rib automatic generation method based on the initial undercut shape.

[0016] The present invention also provides a device for automatically generating reinforcing ribs based on the initial undercut shape, comprising: at least one processor; and at least one memory in communication with the processor; The memory stores instructions executable by the processor, and the instructions are executed by the processor so that the device executes the aforementioned method for automatically generating reinforcing ribs based on the initial undercut shape.

[0017] The present invention also provides a computer-readable storage medium having computer-executable instructions stored thereon. When a processor executes the computer-executable instructions, the aforementioned method for automatically generating reinforcing ribs based on the initial undercut shape is implemented.

[0018] The present invention also provides a computer program product, comprising computer instructions, which, when executed by a processor, enable a computer device to execute the aforementioned method for automatically generating reinforcing ribs based on an initial undercut shape.

[0019] Beneficial effects of the present invention: The automatic generation method of reinforcing ribs based on the initial undercut shape of the present invention mainly relies on traditional image geometry algorithms, uses the undercut control points of adjacent teeth and the curve point information on both sides of the generated undercut to determine the initial position of the undercut reinforcing ribs, and then fine-tunes the length of the reinforcing ribs according to the width of the undercut to construct undercut reinforcing ribs that can adapt to different tooth position areas. The present invention can automatically generate reinforcing ribs according to the position change of the initial automatic undercut shape and tooth characteristics, which can greatly reduce the breakage of the braces model and greatly save manpower and material resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The specific implementation of the present invention will be further explained below in conjunction with the accompanying drawings.

[0021] Figure 1 It is a flow chart of the method for automatically generating reinforcing ribs based on the initial undercut shape of the present invention; Figure 2 A schematic diagram of control points on two adjacent sides of an undercut in the present invention; Figure 3 It is a schematic diagram of the control points of the undercut reinforcing ribs in the present invention; Figure 4 It is a schematic diagram of the grid shape of a single undercut reinforcing rib in the present invention; Figure 5 Schematic diagram of the position and shape of the undercut reinforcing ribs in the present invention; Figure 6 Schematic diagram of the position and shape of the undercut reinforcing ribs in the present invention; Figure 7 A schematic diagram of the overall jaw model of the undercut reinforcement rib in the present invention; Figure 8 It is a block diagram of the automatic generation system of reinforcing ribs based on the initial undercut shape of the present invention. DETAILED DESCRIPTION Example 1

[0022] Combination Figure 1 This embodiment relates to a method for automatically generating reinforcing ribs based on an initial undercut shape, which specifically includes the following steps: Step S1: Obtain control curves on both sides of the undercut.

[0023] Step S2: Obtaining undercut control points according to the undercut control curve.

[0024] Further, in step S2, adjacent left and right control points of the undercut are obtained, and the control points are the intersection points of the teeth and the two sides of the undercut, that is, the undercut grid is intersected with the teeth on the left and right sides to obtain a circle of intersection lines, and points are evenly sampled on the obtained intersection lines on both sides. Specifically, in this embodiment, the number of points sampled on the left and right sides is 30 points respectively, such as Figure 2 As shown in the figure, the yellow points are the collected points.

[0025] Step S3: Obtain the rib control point according to the undercut control point, divide the control points on both sides into two parts according to the buccal and lingual sides, and take one control point at the top of the left and right sides of the buccal and lingual sides as the initial position for constructing the undercut rib. The specific method is as follows: According to the control points obtained in step S2, the curve is divided into two parts, buccal and lingual, according to the buccal and lingual directions of the teeth; Obtain the local coordinate system of the undercut, move the coordinate origin along the Z-axis direction (tooth growth direction) to the top of the undercut, and then move the moved point buccolingually by 0.3 to 0.5 times the buccolingual width of the undercut to obtain the corresponding reinforcing rib control points on the buccolingual side.

[0026] Furthermore, in step S3, the position of the control point is adjusted according to different tooth positions and gaps, and the specific rule method is as follows: If there are gap teeth, regardless of the anterior and posterior teeth, two control points are taken on the buccal and lingual sides to construct the undercut reinforcement ribs; If there are no gap teeth, for the front teeth, regardless of the buccal and lingual directions, only one control point is taken on the left and right sides. For the back teeth, two control points are taken as the control points of the undercut reinforcement rib.

[0027] Specifically, in this embodiment, if there is a gap tooth, the closest distance between the tooth cavity lines of adjacent teeth between teeth 1-8 (between tooth 1 and tooth 2, between tooth 2 and tooth 3, between tooth 3 and tooth 4, between tooth 4 and tooth 5, between tooth 5 and tooth 6, between tooth 6 and tooth 7, or between tooth 7 and tooth 8) in the X-axis direction (i.e., the direction from the center point of the tooth cavity of the left tooth to the center point of the tooth cavity of the right tooth) is greater than 0.5 mm, then the two teeth are regarded as gap teeth, and regardless of the front and rear teeth, two control points are taken on the buccal and lingual sides to construct the undercut reinforcement rib.

[0028] Specifically, in this embodiment, if there is no gap tooth, only one control point is taken on the left and right sides of the front teeth (between teeth No. 3 and No. 4) (i.e., regardless of buccal and lingual directions), and two control points are taken as the control points of the undercut reinforcement rib according to the aforementioned steps for the posterior teeth (between adjacent teeth No. 4-6, including between teeth No. 4 and No. 5 and between teeth No. 5 and No. 6), such as Figure 3 As shown, the four red points in the figure are the control points of the undercut reinforcement ribs.

[0029] Step S4: constructing an undercut stiffener according to the selected stiffener control points.

[0030] Furthermore, in step S4, the specific method for constructing the undercut reinforcement rib is: construct a cylindrical point set with the selected control point as the center of the bottom circle, and construct a cylindrical mesh based on the cylindrical point set. The mesh shape of a single undercut reinforcement rib is as follows: Figure 4 shown.

[0031] Furthermore, the radius of the cylindrical point set is 0.3 mm to 0.5 mm, and the length is the distance between two corresponding rib control points.

[0032] Specifically, in this embodiment, the reinforcing ribs are all cylindrical in shape and are located at the top of the concave. Figure 5 As shown in the figure, the position and shape of the undercut of the gap teeth are similar to those of normal teeth, the only difference is the length of the reinforcing ribs, such as Figure 6 shown.

[0033] Step S5: According to steps S1 to S4, the whole jaw model with undercut reinforcement ribs added is obtained in sequence. Figure 7 shown. Example 2

[0034] Combination Figure 8 , this embodiment relates to a reinforcing rib automatic generation system based on an initial undercut shape, comprising: An undercut control point acquisition module is used to acquire adjacent left and right control points of the undercut according to the undercut control curve; A rib control point acquisition module, used to acquire rib control points according to undercut control points; A rib construction module, used to construct undercut ribs according to selected rib control points; The control module is used to control the undercut control point acquisition module, the rib control point acquisition module and the rib construction module to realize module functions according to the rib automatic generation method based on the initial undercut shape in Example 1. Example 3

[0035] This embodiment relates to a device for automatically generating reinforcing ribs based on an initial undercut shape, comprising: at least one processor; and at least one memory in communication with the processor; The memory stores instructions executable by the processor, and the instructions are executed by the processor so that the device executes the method for automatically generating reinforcing ribs based on the initial undercut shape in Example 1. Example 4

[0036] This embodiment relates to a computer-readable storage medium having computer-executable instructions stored thereon. When a processor executes the computer-executable instructions, the method for automatically generating reinforcing ribs based on the initial undercut shape in Embodiment 1 is implemented. Example 5

[0037] This embodiment relates to a computer program product, including computer instructions, which, when executed by a processor, enable a computer device to execute the method for automatically generating reinforcing ribs based on an initial undercut shape in Embodiment 1.

[0038] Many specific details are described in the above description to facilitate a full understanding of the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited to the specific implementation disclosed above. At the same time, any person familiar with the art can make many possible changes and modifications to the technical solution of the present invention using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A method for automatically generating reinforcing ribs based on an initial undercut shape, characterized in that: The steps include: Step S1: Obtain control curves on both sides of the undercut; Step S2: obtaining the undercut control point according to the undercut control curve; Step S3: Obtain the rib control point according to the undercut control point, divide the control points on both sides into two parts according to the buccal and lingual sides, and take one control point at the top of the left and right sides of the buccal and lingual sides as the initial position for constructing the undercut rib. The specific method is as follows: According to the control points obtained in step S2, the curve is divided into two parts, buccal and lingual, according to the buccal and lingual directions of the teeth; Obtain the local coordinate system of the undercut, move the coordinate origin along the Z-axis direction to the top of the undercut, and then move the moved point buccal-lingually by 0.3 to 0.5 times the buccal-lingual width of the undercut to obtain the corresponding reinforcing rib control points on the buccal-lingual side; Step S4: constructing an undercut reinforcement rib according to the selected reinforcement rib control points; Step S5: According to steps S1 to S4, the entire jaw model with undercut reinforcement ribs added is obtained in sequence.

2. The method for automatically generating reinforcing ribs based on the initial undercut shape according to claim 1, characterized in that: In step S2, adjacent left and right control points of the undercut are obtained, the control points being the intersection points of the teeth and the two sides of the undercut, and points are evenly sampled on the obtained intersection lines on both sides.

3. The method for automatically generating reinforcing ribs based on the initial undercut shape according to claim 1, characterized in that: In step S3, the position of the control point is adjusted according to different tooth positions and gaps, specifically: If there are gap teeth, regardless of the anterior and posterior teeth, two control points are taken on the buccal and lingual sides to construct the undercut reinforcement ribs; If there are no gap teeth, for the front teeth, regardless of the buccal and lingual directions, only one control point is taken on the left and right sides. For the back teeth, two control points are taken as the control points of the undercut reinforcement rib.

4. The method for automatically generating reinforcing ribs based on the initial undercut shape according to claim 1, characterized in that: In step S4, the specific method for constructing the undercut reinforcement rib is: construct a cylindrical point set with the selected control point as the center of the bottom circle, and construct a cylindrical mesh based on the set.

5. The method for automatically generating reinforcing ribs based on the initial undercut shape according to claim 4, characterized in that: The radius of the cylindrical point set is 0.3 mm to 0.5 mm, and the length is the distance between two corresponding rib control points.

6. A system for automatically generating reinforcing ribs based on the initial undercut shape, characterized in that: include: An undercut control point acquisition module is used to acquire adjacent left and right control points of the undercut according to the undercut control curve; A rib control point acquisition module, used to acquire rib control points according to undercut control points; A rib construction module, used to construct undercut ribs according to selected rib control points; A control module is used to control the undercut control point acquisition module, the rib control point acquisition module and the rib construction module to realize module functions according to the rib automatic generation method based on the initial undercut morphology according to any one of claims 1-5.

7. A device for automatically generating reinforcing ribs based on an initial undercut shape, characterized in that: include: at least one processor; as well as at least one memory in communication with the processor; Wherein, the memory stores instructions executable by the processor, and the instructions are executed by the processor so that the device executes the method for automatically generating reinforcing ribs based on the initial undercut shape as described in any one of claims 1-5.

8. A computer-readable storage medium, characterized in that: Computer execution instructions are stored thereon, and when the processor executes the computer execution instructions, the method for automatically generating reinforcing ribs based on the initial undercut shape as described in any one of claims 1 to 5 is implemented.

9. A computer program product, characterized in that: The method comprises computer instructions, which, when executed by a processor, enable a computer device to execute the method for automatically generating reinforcing ribs based on an initial undercut shape according to any one of claims 1 to 5.

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