Method, program, system and device for automatically adjusting form of eruption cap based on tooth hole line of adjacent tooth

Abstract

The invention relates to an automatic germinating cap form adjusting method based on tooth hole lines of adjacent teeth. The method comprises the following steps: S1, acquiring germinating cap grid data of upper and lower jaws, and determining adjacent tooth positions on the left and right sides of each germinating cap; s2, obtaining tongue-side nearest points of tooth hole lines on the left side and the right side and a tooth root lowest point, closest to the tongue side, of the eruption cap grid; s3, calculating the projection distance between the lowest point of the canine tooth and incisor tooth eruption cap and the lowest point of the adjacent tooth in the Z-axis direction; and S4, carrying out TPS deformation on the germinating cap of which the projection distance between the lowest point of the bottom of the germinating cap and the lowest point of the adjacent tooth does not meet the production requirement. According to the method, the height relation between the root part of the germination cap and the adjacent teeth is calculated by utilizing the tooth hole line and the feature points of the germination cap, so that the form of the germination cap is automatically adjusted. According to the method, the form of the eruption cap obtained after automatic adjustment can better meet the requirement of a cutting line, the cutting line is smoother, a doctor does not need to adjust the form of the eruption cap again, and therefore manpower and time can be saved to a certain degree.

Description

Technical Field

[0001] The present invention relates to the field of digital oral technology, and in particular to a method, program, system and device for automatically adjusting the shape of an eruption cap based on an adjacent tooth cavity line. Background Art

[0002] Eruption caps are usually used in the period of children's tooth replacement. When the eruption path of permanent teeth is not smooth and there are phenomena such as retained deciduous teeth, during the process of dental correction, it is necessary to add eruption caps to reserve sufficient growth space for the unerupted teeth. Eruption caps are designed for the patient's teeth that have not yet fully erupted. They are mainly used in the early correction process of adolescents to avoid hindering the normal eruption of teeth. At the same time, they prevent the mandibular anterior teeth from erupting vertically or tilting labially, reserving space for the growth of teeth. The preparation process of the braces requires the control of the eruption cap shape, and a suitable eruption cap can also stabilize the braces.

[0003] However, the artificially designed and placed eruption cap shape may not be fully adapted to production. The position of the eruption cap that is too high or too low will affect the normal production of the orthodontic appliance and whether the orthodontic appliance has appropriate correction force. In the past, the shape of the eruption cap was only designed and adjusted by the doctor, which may lead to certain production irregularities. However, since the addition of the eruption cap is completely dependent on the manual work of the design doctor, if production problems are caused by improper addition, the only option is to rework and redesign the plan.

[0004] Therefore, automatically adjusting the eruption cap shape according to the status of adjacent teeth to adapt it to production and ensure the correction strength of the orthodontic appliance has become an indispensable part of reducing production losses. Summary of the invention

[0005] The technical problem to be solved by the present invention is to design a method, program, system and device for automatically adjusting the morphology of an eruption cap based on the cavity line of adjacent teeth. With the help of traditional image geometry algorithms, the cavity line and the characteristic points of the eruption cap are used to calculate the height relationship between the root of the eruption cap and the adjacent teeth, and then the morphology of the eruption cap is automatically adjusted, thereby solving the existing technical problems.

[0006] In order to solve the above technical problems, the present invention provides a method for automatically adjusting the eruption cap morphology based on the adjacent tooth cavity line, comprising the following steps: Step S1: Obtain the eruption cap grid data of the upper and lower jaws, and determine the adjacent tooth positions on the left and right sides of each eruption cap.

[0007] Step S2: Obtain the lingual nearest point of the tooth cavity lines on the left and right sides, and the lowest point of the tooth root closest to the lingual side of the eruption cap grid.

[0008] Step S3: Calculate the projection distance between the lowest point of the eruption caps of the canine and incisor and the lowest point of the adjacent teeth in the Z-axis direction.

[0009] Step S4: Perform TPS deformation on the eruption cap whose projection distance between the lowest point of the bottom of the eruption cap and the lowest point of the adjacent tooth does not meet the production requirements.

[0010] Furthermore, step S1 specifically includes the following steps: Step S11: Acquire all eruption cap data of the upper and lower jaws according to the tooth attachment type.

[0011] Step S12: The intersection line of each eruption cap grid and the gingival grid is obtained, and the center point C of the intersection line obtained by the eruption cap is compared with the position of each center point of each normal tooth cavity line to obtain the cavity center point of the left and right normal teeth closest to the center point C and the tooth position numbers on the left and right sides.

[0012] Furthermore, in step S2, obtaining the closest point on the lingual side of the tooth cavity line on the left and right sides specifically includes the following steps: Step S211: Adjust the local coordinates of the tooth so that the Y-axis direction points to the tongue side and the Z-axis direction points to the root growth direction.

[0013] Step S212: construct two rays L1 and L2 in the Y-axis direction of the left and right teeth respectively, taking the center points of the left and right tooth cavity lines as the origins.

[0014] Step S213: Calculate the projection points of each point on the left and right tooth cavity lines to L1 and L2 respectively. According to the obtained projection points, calculate the distance from the projection points to the ray origin, and find the corresponding maximum projection points P1 and P2, where P1 and P2 are the closest points on the lingual side of the left and right tooth cavities respectively.

[0015] Furthermore, in step S2, obtaining the lowest point of the tooth root closest to the lingual side of the eruption cap grid specifically includes the following steps: Step S221: Adjust the local coordinates of the eruption cap so that its Y-axis direction points to the lingual side and its Z-axis direction points to the root growth direction.

[0016] Step S222: Taking the center point of the eruption cap as the origin, and taking the Y axis and the Z axis as the directions, respectively construct rays L3 and L4.

[0017] Step S223: traverse all points on the grid, project each point onto rays L3 and L4 respectively, obtain the corresponding distances distY and distZ, calculate the sum of the distances distY and distZ, and obtain the maximum distance point P3, where P3 is the lowest point of the tooth root closest to the lingual side on the eruption cap grid.

[0018] Furthermore, in step S3, a ray L5 is constructed with the center point of the eruption cap of the canine or incisor as the origin and the Z axis of the eruption cap as the direction, and the midpoint Pc of the nearest points on the lingual side of the left and right tooth cavities obtained in step S2 and the lowest point of the tooth root closest to the lingual side of the eruption cap grid are projected onto L5 to obtain the corresponding projection distances distC and distM, respectively.

[0019] Furthermore, in step S4, the distances distC and distM obtained in step S3 are compared. If distC is greater than distM or distC is less than or equal to distM and the difference between distM and distC is less than 1, the TPS deformation algorithm is used to deform the root of the eruption cap.

[0020] Furthermore, in order to avoid subsequent cutting and production problems caused by the eruption cap being too long, a distance d is reserved between the root of the deformed eruption cap and the bottom of the jaw, and the distance d ranges from 1.5 mm to 2.5 mm.

[0021] The present invention also provides an automatic adjustment system for the eruption cap morphology based on the adjacent tooth cavity line, comprising: The data acquisition module includes a first data acquisition unit and a second data acquisition unit. The first data acquisition unit is used to acquire the eruption cap grid data of the upper and lower jaws and determine the adjacent tooth positions on the left and right sides of each eruption cap; the second data acquisition unit is used to acquire the lingual nearest point of the tooth cavity line on the left and right sides and the lowest point of the tooth root closest to the lingual side of the eruption cap grid.

[0022] The data calculation module is used to calculate the projection distance between the lowest point of the eruption caps of the canine and incisor and the lowest point of the adjacent teeth in the Z-axis direction.

[0023] The data judgment module is used to judge whether the projection distance between the lowest point of the bottom of the eruption cap and the lowest point of the adjacent tooth meets the production requirements.

[0024] The deformation module is used to perform TPS deformation on the eruption cap whose projection distance between the lowest point of the bottom of the eruption cap and the lowest point of the adjacent tooth does not meet the production requirements.

[0025] The present invention also provides an automatic adjustment device for the eruption cap shape based on the adjacent tooth cavity line, comprising: at least one processor; and at least one memory in communication with the processor; Wherein, the memory stores instructions that can be executed by the processor, and the instructions are executed by the processor to enable the device to perform the aforementioned method for automatically adjusting the eruption cap morphology based on the adjacent tooth cavity line.

[0026] 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 adjusting the morphology of an eruption cap based on adjacent tooth cavity lines.

[0027] Beneficial effects of the present invention: The method for automatically adjusting the eruption cap morphology based on the adjacent tooth cavity line of the present invention uses a traditional image geometry algorithm to calculate the height relationship between the eruption cap root and the adjacent teeth using the cavity line and the characteristic points of the eruption cap, and then automatically adjusts the eruption cap morphology. The eruption cap morphology obtained after automatic adjustment by the method of the present invention is more able to meet the requirements of the cutting line, making the cutting line smoother, and the doctor does not need to adjust the eruption cap morphology again, thereby saving manpower and time to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The specific implementation of the present invention will be further explained below in conjunction with the accompanying drawings.

[0029] Figure 1 It is a flow chart of the method for automatically adjusting the eruption cap morphology based on the adjacent tooth cavity line in the present invention; Figure 2 It is a schematic diagram of the lowest point of the eruption cap and the lingual side of the adjacent teeth in the present invention; Figure 3 This is a height comparison diagram of the lowest point distance in the present invention; Figure 4 This is a comparison diagram before and after the root extension in the present invention; Figure 5 This is a grid comparison diagram before and after the cap is deformed in the present invention; Figure 6 It is a system block diagram of the system for automatically adjusting the eruption cap morphology based on the adjacent tooth cavity line in the present invention. DETAILED DESCRIPTION Example 1

[0030] Combination Figure 1 As shown, the method for automatically adjusting the eruption cap shape based on the adjacent tooth cavity line in this embodiment specifically includes the following steps: Step S1: Obtain the eruption cap grid data of the upper and lower jaws, and determine the adjacent tooth positions on the left and right sides of each eruption cap.

[0031] In this embodiment, preferably, step S1 specifically includes the following steps: Step S11: Acquire all eruption cap data of the upper and lower jaws according to the tooth attachment type.

[0032] Step S12: The intersection line of each eruption cap grid and the gingival grid is obtained, and the center point C of the intersection line obtained by the eruption cap is compared with the position of each center point of each normal tooth cavity line to obtain the cavity center point of the left and right normal teeth closest to the center point C and the tooth position numbers on the left and right sides.

[0033] Step S2: Obtain the nearest lingual point of the tooth cavity line on both sides, and the lowest point of the tooth root closest to the lingual side of the eruption cap mesh, such as Figure 2 shown.

[0034] In this embodiment, in step S2, obtaining the closest points of the lingual side of the tooth cavity lines on the left and right sides specifically includes the following steps: Step S211: Adjust the local coordinates of the tooth so that the Y-axis direction points to the tongue side and the Z-axis direction points to the root growth direction.

[0035] Step S212: construct two rays L1 and L2 in the Y-axis direction of the left and right teeth respectively, taking the center points of the left and right tooth cavity lines as the origins.

[0036] Step S213: Calculate the projection points of each point on the left and right tooth cavity lines onto the rays L1 and L2 respectively. Calculate the distance from the projection point to the origin of the ray based on the obtained projection points, where the distance of the point in the positive direction of the ray is greater than 0, and vice versa. Find the corresponding maximum value projection points P1 and P2, where P1 and P2 are the closest points on the lingual side of the left and right tooth cavities respectively.

[0037] In this embodiment, preferably, in step S2, obtaining the lowest point of the tooth root closest to the lingual side of the eruption cap grid specifically includes the following steps: Step S221: Adjust the local coordinates of the eruption cap so that its Y-axis direction points to the lingual side and its Z-axis direction points to the root growth direction.

[0038] Step S222: Taking the center point of the eruption cap as the origin, and taking the Y axis and the Z axis as the directions, respectively construct rays L3 and L4.

[0039] Step S223: traverse all points on the grid, project each point onto rays L3 and L4 respectively, and obtain the corresponding distances distY and distZ according to the calculation in step S213, calculate the sum of the distances distY and distZ, and obtain the distance and maximum value point P3, where P3 is the lowest point of the tooth root closest to the lingual side on the eruption cap grid.

[0040] Specifically, in this embodiment, the eruption caps of different tooth positions are distinguished according to the type of the eruption cap attachment, and the canine and incisor eruption caps are marked as true, as the eruption caps that may need to be deformed.

[0041] Step S3: Calculate the projection distance between the lowest point of the eruption caps of the canine and incisor and the lowest point of the adjacent teeth in the Z-axis direction.

[0042] In this embodiment, preferably, in step S3, the center point of the eruption cap of the canine or incisor is taken as the origin, and the Z axis of the eruption cap is taken as the direction to construct a ray L5, and the midpoint Pc of the closest points on the lingual side of the left and right tooth cavities obtained in step S2 and the lowest point of the root closest to the lingual side of the eruption cap grid are projected onto L5, and the corresponding projection distances distC and distM are obtained respectively. The height distance comparison of the lowest point in the Z axis direction is as follows: Figure 3 shown.

[0043] Step S4: Perform TPS deformation on the eruption cap whose projection distance between the lowest point of the bottom of the eruption cap and the lowest point of the adjacent tooth does not meet the production requirements.

[0044] In this embodiment, preferably, in step S4, the distances distC and distM obtained in step S3 are compared. If distC is greater than distM or distC is less than or equal to distM and the difference between distM and distC is less than 1, the TPS deformation algorithm is used to deform the root of the eruption cap.

[0045] In this embodiment, in order to avoid the subsequent cutting production problems caused by the excessive length of the eruption cap, a distance d is reserved between the root of the deformed eruption cap and the bottom of the jaw. The range of distance d is 1.5 mm to 2.5 mm. Specifically, in this embodiment, d is 2.0 mm. Figure 4 , before and after the emergence of the cap shape change Figure 5 shown. Figure 4 The middle blue is the extended eruption cap mesh, which can be seen to have penetrated deep into the gums; Figure 5 The black grid is the original eruption cap structure before extension, and the blue grid is the structure of the eruption cap root after extension. Figure 5 It can be seen that the mesh morphology of the eruption cap remains basically unchanged, while the root area undergoes extension deformation. Example 2

[0046] Combination Figure 6 As shown, the automatic adjustment system of the eruption cap morphology based on the adjacent tooth cavity line in this embodiment includes: The data acquisition module includes a first data acquisition unit and a second data acquisition unit. The first data acquisition unit is used to acquire the eruption cap grid data of the upper and lower jaws and determine the adjacent tooth positions on the left and right sides of each eruption cap; the second data acquisition unit is used to acquire the lingual nearest point of the tooth cavity line on the left and right sides and the lowest point of the tooth root closest to the lingual side of the eruption cap grid.

[0047] The data calculation module is used to calculate the projection distance between the lowest point of the eruption caps of the canine and incisor and the lowest point of the adjacent teeth in the Z-axis direction.

[0048] The data judgment module is used to judge whether the projection distance between the lowest point of the bottom of the eruption cap and the lowest point of the adjacent tooth meets the production requirements.

[0049] The deformation module is used to perform TPS deformation on the eruption cap whose projection distance between the lowest point of the bottom of the eruption cap and the lowest point of the adjacent tooth does not meet the production requirements.

[0050] Preferably, this embodiment further includes a control module, which controls the data acquisition module, the data calculation module, the data judgment module and the deformation module to perform various operations according to the method for automatic adjustment of the eruption cap morphology based on the adjacent tooth cavity line in Example 1. Example 3

[0051] The automatic adjustment device for the eruption cap shape based on the adjacent tooth cavity line in this embodiment includes: 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 adjusting the eruption cap morphology based on the adjacent tooth cavity line in Example 1. Example 4

[0052] A computer program product in this embodiment includes computer instructions, which, when executed by a processor, enable a computer device to execute the method for automatically adjusting the morphology of an eruption cap based on adjacent tooth cavity lines as in the embodiment. Example 5

[0053] The computer-readable storage medium in this embodiment stores computer execution instructions thereon. When the processor executes the computer execution instructions, the method for automatically adjusting the eruption cap morphology based on the adjacent tooth cavity line as in Example 1 is implemented.

[0054] 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 adjusting the eruption cap morphology based on the adjacent tooth cavity line, characterized in that: The steps include: Step S1: Obtaining the eruption cap grid data of the upper and lower jaws, and determining the adjacent tooth positions on the left and right sides of each eruption cap; Step S2: obtaining the closest lingual point of the tooth cavity lines on the left and right sides, and the lowest point of the tooth root closest to the lingual side of the eruption cap grid; Step S3: Calculate the projection distance between the lowest point of the eruption caps of the canine and incisor and the lowest point of the adjacent teeth in the Z-axis direction; Step S4: Perform TPS deformation on the eruption cap whose projection distance between the lowest point of the bottom of the eruption cap and the lowest point of the adjacent tooth does not meet the production requirements.

2. The method for automatically adjusting the eruption cap morphology based on the adjacent tooth cavity line according to claim 1, characterized in that: Step S1 specifically includes the following steps: Step S11: Acquire all eruption cap data of the upper and lower jaws according to the tooth attachment type; Step S12: The intersection line of each eruption cap grid and the gingival grid is obtained, and the center point C of the intersection line obtained by the eruption cap is compared with the position of each center point of each normal tooth cavity line to obtain the cavity center point of the left and right normal teeth closest to the center point C and the tooth position numbers on the left and right sides.

3. The method for automatically adjusting the eruption cap morphology based on the adjacent tooth cavity line according to claim 1, characterized in that: In step S2, obtaining the closest point on the lingual side of the tooth cavity line on the left and right sides specifically includes the following steps: Step S211: adjusting the local coordinates of the tooth so that the Y-axis direction points to the tongue side and the Z-axis direction points to the root growth direction; Step S212: construct two rays L1 and L2 in the Y-axis direction of the left and right teeth respectively, taking the center points of the left and right tooth cavity lines as the origins; Step S213: Calculate the projection points of each point on the left and right tooth cavity lines to L1 and L2 respectively. According to the obtained projection points, calculate the distance from the projection points to the ray origin, and find the corresponding maximum projection points P1 and P2, where P1 and P2 are the closest points on the lingual side of the left and right tooth cavities respectively.

4. The method for automatically adjusting the eruption cap morphology based on the adjacent tooth cavity line according to claim 1, characterized in that: In step S2, obtaining the lowest point of the tooth root closest to the lingual side of the eruption cap grid specifically includes the following steps: Step S221: adjusting the local coordinates of the eruption cap so that its Y-axis direction points to the lingual side and its Z-axis direction points to the root growth direction; Step S222: Taking the center point of the eruption cap as the origin, and taking the Y axis and the Z axis as the directions, respectively construct rays L3 and L4; Step S223: traverse all points on the grid, project each point onto rays L3 and L4 respectively, obtain the corresponding distances distY and distZ, calculate the sum of the distances distY and distZ, and obtain the maximum distance point P3, where P3 is the lowest point of the tooth root closest to the lingual side on the eruption cap grid.

5. The method for automatically adjusting the eruption cap morphology based on the adjacent tooth cavity line according to claim 1, characterized in that: In step S3, a ray L5 is constructed with the center point of the eruption cap of the canine or incisor as the origin and the Z axis of the eruption cap as the direction. The midpoint Pc of the nearest points on the lingual side of the left and right tooth cavities obtained in step S2 and the lowest point of the root closest to the lingual side of the eruption cap grid are projected onto L5 to obtain the corresponding projection distances distC and distM, respectively.

6. The method for automatically adjusting the eruption cap morphology based on the adjacent tooth cavity line according to claim 5, characterized in that: In step S4, the distances distC and distM obtained in step S3 are compared. If distC is greater than distM or distC is less than or equal to distM and the difference between distM and distC is less than 1, the TPS deformation algorithm is used to deform the root of the eruption cap.

7. The method for automatically adjusting the eruption cap morphology based on the adjacent tooth cavity line according to claim 6, characterized in that: A distance d is reserved between the root of the deformed eruption cap and the bottom of the jaw, and the distance d ranges from 1.5 mm to 2.5 mm.

8. An automatic adjustment system for the eruption cap morphology based on the adjacent tooth cavity line, characterized in that: include: The data acquisition module includes a first data acquisition unit and a second data acquisition unit, wherein the first data acquisition unit is used to acquire the eruption cap grid data of the upper and lower jaws and determine the adjacent tooth positions on the left and right sides of each eruption cap; the second data acquisition unit is used to acquire the lingual nearest point of the tooth cavity line on the left and right sides and the lowest point of the tooth root closest to the lingual side of the eruption cap grid; A data calculation module is used to calculate the projection distance between the lowest point of the eruption caps of the canine and incisor and the lowest point of the adjacent teeth in the Z-axis direction; A data judgment module is used to judge whether the projection distance between the lowest point of the bottom of the eruption cap and the lowest point of the adjacent tooth meets the production requirements; The deformation module is used to perform TPS deformation on the eruption cap whose projection distance between the lowest point of the bottom of the eruption cap and the lowest point of the adjacent tooth does not meet the production requirements.

9. An automatic adjustment device for the eruption cap shape based on the adjacent tooth cavity line, 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 automatic adjustment of the eruption cap morphology based on the adjacent tooth cavity line described in any one of claims 1-7.

10. 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 adjusting the morphology of an eruption cap based on adjacent tooth cavity lines as described in any one of claims 1 to 7.

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