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EP-4582050-B1 - METHOD, COMPUTING DEVICE AND COMPUTER PROGRAM FOR PROVIDING SOLUTION FOR ESTABLISHING ORTHODONTIC PLANNING USING 3D TOOTH MODEL

EP4582050B1EP 4582050 B1EP4582050 B1EP 4582050B1EP-4582050-B1

Inventors

  • CHO, Heonjae
  • OH, SEUNGYOUNG

Dates

Publication Date
20260513
Application Date
20250103

Claims (12)

  1. A method of providing a solution for establishing orthodontic planning using a 3D tooth model by a computing device, the method comprising: generating the 3D tooth model including a plurality of individual tooth models generated by individually modeling each of a plurality of teeth for a target (S110); and providing the solution for establishing orthodontic planning based on the generated 3D tooth model (S120), characterized in that the providing of the solution includes: establishing temporary orthodontic planning for the at least one tooth based on a crown area of at least one individual tooth model corresponding to at least one of the plurality of teeth that requires correction; reviewing the established temporary orthodontic planning based on a root area of the at least one individual tooth model; and providing a solution for establishing final orthodontic planning based on the review result of the established temporary orthodontic planning.
  2. The method of claim 1, wherein the reviewing of the established temporary orthodontic planning includes: calculating an expected amount of orthodontic movement for the root area of the at least one tooth corresponding to an amount of unit orthodontic movement based on the amount of unit orthodontic movement for the at least one tooth according to the established temporary orthodontic planning, the amount of unit orthodontic movement including a unit movement amount and a unit rotation amount in a direction based on at least one of an X-axis, a Y-axis, and a Z-axis; and determining whether the calculated expected correction amount is greater than or equal to a threshold value, and the providing of the solution for establishing the final orthodontic planning includes providing information on the calculated expected amount of orthodontic movement, and when the calculated expected amount of orthodontic movement is greater than or equal to the threshold value, guiding adjustment of the amount of unit orthodontic movement according to the calculated expected amount of orthodontic movement or automatically adjusting the amount of unit orthodontic movement according to the calculated expected amount of orthodontic movement.
  3. The method of claim 2, wherein the calculating of the expected amount of orthodontic movement for the root area of the at least one tooth includes: setting an axis in a longitudinal direction of the tooth on the root area of the at least one individual tooth model; setting a center of movement on the root area of the at least one individual tooth model; and calculating the expected amount of orthodontic movement for the root area of the at least one tooth corresponding to the amount of unit orthodontic movement using the set axis and the set center of movement.
  4. The method of claim 3, wherein the setting of the center of movement includes setting the center of movement on the root area of the at least one individual tooth model using at least one of a method of setting the center of movement based on a user input acquired through a user interface (UI) that outputs the generated 3D tooth model and a method of automatically setting the center of movement based on a landmark located on the root area of the at least one individual tooth model.
  5. The method of claim 1, wherein the reviewing of the established temporary orthodontic planning includes: determining an expected movement direction and an expected movement amount of a root area of a specific tooth when a crown area of the specific tooth moves in a specific direction according to the established temporary orthodontic planning; and determining a position of the root area of the specific tooth based on the determined expected movement direction and the determined expected movement amount.
  6. The method of claim 1, wherein the reviewing of the established temporary orthodontic planning includes: calculating an orthodontic amount of the root area relative to an orthodontic amount of the crown area for each of the plurality of individual tooth models using the generated 3D tooth model; and calculating an orthodontic period for the at least one tooth based on the calculated orthodontic amount of the root area relative to the orthodontic amount of the crown area, and the providing of the solution for establishing the final orthodontic planning includes providing information on the calculated orthodontic period.
  7. The method of claim 6, wherein the calculating of the orthodontic period includes: when correction from a first point to a second point is required for a specific tooth, dividing a section from the first point to the second point based on the amount of unit orthodontic movement for the specific tooth according to the established temporary orthodontic planning; and calculating the orthodontic period for the at least one tooth based on the number of divided sections.
  8. The method of claim 1, wherein the providing of the solution includes: when movement from a current position to a target position is required for at least one of the plurality of teeth, determining an amount of unit orthodontic movement for the at least one tooth using at least one individual tooth model corresponding to each of the at least one tooth; and establishing orthodontic planning including information on the determined amount of unit orthodontic movement and the orthodontic period expected to be required when correcting the at least one tooth according to the determined amount of unit orthodontic movement, and providing information on the established orthodontic planning.
  9. The method of claim 8, wherein the providing of the information on the established orthodontic planning includes simulating the correction of the at least one tooth according to the established orthodontic planning through the generated 3D tooth model, and providing a result of the simulation together with the information on the established orthodontic planning.
  10. The method of claim 8, wherein the generating of the 3D tooth model includes: dividing a plurality of first areas corresponding to each of the plurality of teeth from tooth scan data; dividing a plurality of second areas corresponding to each of the plurality of teeth from tooth scan data; and generating a plurality of individual tooth models by aligning the plurality of divided first areas with the plurality of divided second areas, and generating the 3D tooth model by arranging each of the plurality of generated individual tooth models at a position of a tooth corresponding to each of the plurality of generated individual tooth models.
  11. A computing device (100) for performing a method of providing a solution for establishing orthodontic planning using a 3D tooth model, the computing device comprising: a processor (110); a network interface (140); a memory (120); and a computer program (151) loaded into the memory and executed by the processor, wherein the computer program includes: an instruction for generating the 3D tooth model including a plurality of individual tooth models generated by individually modeling each of a plurality of teeth for a target; and an instruction for providing the solution for establishing orthodontic planning based on the generated 3D tooth model, characterized in that the providing of the solution includes: establishing temporary orthodontic planning for the at least one tooth based on a crown area of at least one individual tooth model corresponding to at least one of the plurality of teeth that requires correction; reviewing the established temporary orthodontic planning based on a root area of the at least one individual tooth model; and providing a solution for establishing final orthodontic planning based on the review result of the established temporary orthodontic planning.
  12. A computer program (151) stored on a computing device-readable recording medium, coupled to the computing device to perform a method of providing a solution for establishing orthodontic planning using a 3D tooth model, wherein the computer program includes the following operations: generating the 3D tooth model including a plurality of individual tooth models generated by individually modeling each of a plurality of teeth for a target; and providing the solution for establishing orthodontic planning based on the generated 3D tooth model, characterized in that the providing of the solution includes: establishing temporary orthodontic planning for the at least one tooth based on a crown area of at least one individual tooth model corresponding to at least one of the plurality of teeth that requires correction; reviewing the established temporary orthodontic planning based on a root area of the at least one individual tooth model; and providing a solution for establishing final orthodontic planning based on the review result of the established temporary orthodontic planning.

Description

BACKGROUND 1. Field of the Invention The present invention relates to a method, computing device, and computer program for providing a solution for establishing orthodontic planning using a 3D tooth model. 2. Discussion of Related Art In general, uneven dentition or uneven malocclusion of teeth may cause abnormal development of teeth themselves, abnormal development of a jawbone, etc. People with uneven dentition or malocclusion cover their mouths when talking or laughing with others due to the dentition, and may also become passive in interpersonal relationships, making it difficult to lead a satisfactory social life. In addition, when eating food, food may not be ground evenly and may get stuck between teeth, which may cause various dental diseases or diseases of the digestive system. Therefore, in order to solve this problem, an orthodontic technology is being applied that causes the movement of teeth along with the remodeling of an alveolar bone surrounding the teeth by continuously applying force to the teeth. Meanwhile, systematic knowledge of the movement of teeth is required during orthodontic treatment, an accurate dental laboratory process should be established as the basis, and systematic monitoring is essential in the actual clinical process. In the past, various programs for orthodontic treatment were developed, and 3D tooth models were created and analyzed through these programs to more accurately establish the orthodontic planning. However, the movement of teeth includes linear and rotational movements, and in order to plan the linear and rotational movements more accurately, it is important to accurately set the axis and center of rotation of a tooth, and therefore information on a root is very important to more accurately establish orthodontic planning. However, because conventional orthodontic programs establish orthodontic planning by considering only a crown area of a tooth, it is difficult to establish accurate orthodontic planning. US 2007/0168152 A1 discloses acquiring a digital model of a patient's teeth, automatically detecting reference data or features based on the digital model, and automatically computing dental measurements based on said reference data or features. US 2023/080308 A1 discloses a method and system for optimizing dental aligner geometry. US 2023/005593 A1 discloses systems and methods for manufacturing an orthodontic appliance. WO 2018/118200 A1 discloses orthodontic planning systems. WO 2023/220837 A1 discloses a system and method for orthodontic appliance delivery. US 2005/208449 A1 discloses root-based tooth moving sequencing. US 2022/211467 A1 discloses orthodontic attachment systems and methods. SUMMARY OF THE INVENTION The present invention is directed to providing a method, a computing device, and computer program for providing a solution for establishing orthodontic planning using a 3D tooth model capable of more accurately establishing the orthodontic planning by generating the 3D tooth model by performing accurate modeling on not only a crown area but also a root area and establishing the orthodontic planning using the generated 3D tooth model. The problems to be solved by the present invention are not limited to the above-described problems, and other problems that are not described may be obviously understood by those skilled in the art from the following description. According to the present invention, there is provided a method of providing a solution for establishing orthodontic planning using a 3D tooth model by a computing device according to claim 1, a computing device according to claim 11, and a computer program stored on a computer device-reading recording medium coupled to the computing device, according to claim 12. Preferred features are set out in the dependent claims. Other detailed contents of the present invention are described in a detailed description and are illustrated in the drawings. BRIEF DESCRIPTION OF DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent to those of ordinary skill in the art by describing exemplary embodiments thereof in detail with reference to the accompanying drawings, in which: FIG. 1 is a diagram illustrating a system for providing a solution for establishing orthodontic planning using a 3D tooth model according to an embodiment of the present invention;FIG. 2 is a diagram for describing a hardware configuration of a computing device according to another embodiment of the present invention;FIG. 3 is a flowchart of a method of providing a solution for establishing orthodontic planning using a 3D tooth model according to another embodiment of the present invention;FIG. 4 is a flowchart for describing a method of generating a 3D tooth model in various embodiments;FIGS. 5A and 5B are diagrams illustrating tooth scan data and tooth computed tomography (CT) data used for generating a 3D tooth model in various embodiments; andFIGS. 6A and 6B are diagrams