Orthodontic planning method using a mandibular movement simulation with condylar inclination angle when manufacturing transparent braces, and orthodontic planning apparatus implementing the method

Abstract

A method for planning orthodontic treatment using a mandibular movement simulation with an angle of condylar inclination applied during the fabrication of clear aligners, and an orthodontic planning device for implementing the same are disclosed. To this end, a method for planning orthodontic treatment is provided, comprising the steps of: determining the tooth movement stage through a mandibular movement simulation with the patient's angle of condylar inclination applied; performing a mandibular movement simulation with the angle of condylar inclination applied for each tooth movement stage to generate occlusal information for each stage; and generating information for fabricating clear aligners for each stage according to the occlusal information for each stage. According to the present invention, occlusal safety can be improved to enhance the accuracy of the tooth movement treatment plan.

Description

Technology Field

[0001] The present invention relates to a dental orthodontic planning method using a mandibular movement simulation with an overbite angle applied when manufacturing a clear aligner, and a dental orthodontic planning device implementing the same. More specifically, the invention relates to a dental orthodontic planning method and a dental orthodontic planning device implementing the same, which can improve safety during dental orthodontics and improve the accuracy of tooth movement treatment planning by applying an overbite angle to the mandibular movement simulation. Background Technology

[0002] Generally, malocclusion refers to a condition where the teeth are misaligned and the occlusion of the upper and lower teeth is abnormal. Malocclusion can lead to functional problems, such as unclear pronunciation, as well as aesthetic issues, such as a protruding mouth or facial asymmetry. Furthermore, uneven teeth make brushing difficult, resulting in health problems such as cavities and gum disease. Such malocclusion can be corrected to a normal occlusion through orthodontic treatment.

[0003] Recently, clear aligner orthodontic treatment has become widely used to correct malocclusion. This method involves fabricating clear aligners in stages and replacing them on the teeth to gradually move the teeth to their final target position. While treatment plans were previously established based solely on the patient's tooth alignment, mandibular movement influences the formation of occlusal relationships and tooth movement during actual orthodontic treatment. Furthermore, the condylar inclination angle—the angle parallel to the path of the condyle during mandibular movement—varies from patient to patient. Consequently, orthodontic treatment that fails to account for mandibular movement incorporating the condylar inclination angle can lead to malocclusion or reduce the effectiveness of the correction. Prior art literature

[0004] Republic of Korea Registered Patent No. 10-2346563 (2022.01.03.) The problem to be solved

[0005] Accordingly, the objective of the present invention is to provide a dental orthodontic planning method that utilizes a mandibular movement simulation with an overbite angle applied during the production of a clear aligner, which can improve occlusal safety by reflecting individual mandibular movement characteristics to enable the production of a patient-customized clear aligner, and a dental orthodontic planning device that implements the same. means of solving the problem

[0006] To achieve the objectives of the present invention as described above, the orthodontic planning method using mandibular movement simulation of the present invention comprises: (a) a step of determining a tooth movement stage through mandibular movement simulation applying the patient's condylar inclination angle; (b) a step of generating step-by-step occlusal information by performing a mandibular movement simulation applying the condylar inclination angle for each tooth movement stage; and (c) a step of generating step-by-step clear aligner manufacturing information according to the step-by-step occlusal information.

[0007] In addition, the orthodontic planning method using mandibular movement simulation of the present invention is characterized by further comprising: (d) a step of receiving additional oral scan information during treatment and analyzing the tooth movement step; and (e) a step of modifying the tooth movement step and repeating steps (b) through (d) when the tooth movement information is changed.

[0008] In addition, the orthodontic planning method using mandibular movement simulation of the present invention further comprises, prior to step (a), a step of collecting the patient's orthodontic diagnostic information in the orthodontic planning device; and a step of determining the condylar inclination angle by measuring the inclination of the path along which the condyle moves within the temporomandibular joint while reproducing the movement of the mandible based on a 3D model of the patient's oral cavity generated by combining CBCT (Cone-Beam Computed Tomography) image information and oral scan information among the orthodontic diagnostic information.

[0009] And the orthodontic planning method using mandibular movement simulation of the present invention may further include: (f) a step of determining the tooth movement stage when the tooth movement information has not changed; and (g) a step of returning to step (d) when the orthodontic treatment has not been completed.

[0010] The above step-by-step occlusal information is characterized by including at least one of the following: an accurate occlusal state in the oral cavity, the interlocking of upper and lower teeth, the type and severity of malocclusion such as crowded teeth, protruding mouth, and deep bite, and data for simulating tooth movement.

[0011] Meanwhile, an orthodontic planning device for implementing an orthodontic planning method using mandibular movement simulation is characterized by comprising: a storage unit in which a mandibular movement simulation program is stored; a display unit in which the mandibular movement simulation is displayed; a user command input unit in which a user command for performing the mandibular movement simulation displayed on the display unit and a user command for determining the tooth movement steps are input; and a processor unit that applies the patient's condylar inclination angle to the mandibular movement simulation to display it on the display unit, performs the mandibular movement simulation with the condylar inclination angle applied according to the tooth movement steps determined by the user command to generate step-by-step occlusion information, and then generates step-by-step clear aligner manufacturing information according to the step-by-step occlusion information.

[0012] In addition, the orthodontic treatment device of the present invention further includes a data transmission and reception unit that receives oral scan information during treatment; and the processor unit is characterized by repeating the process of analyzing tooth movement stages using the oral scan information during treatment, modifying the tooth movement stages when the tooth movement information is changed, performing a mandibular movement simulation applying the condylar inclination angle to each tooth movement stage to generate step-by-step occlusal information, and then generating step-by-step clear aligner manufacturing information according to the step-by-step occlusal information.

[0013] The above processor unit is characterized by determining the condylar inclination angle by measuring the inclination of the path along which the condyle moves within the temporomandibular joint while reproducing the movement of the mandible based on a 3D model of the patient's oral cavity generated by combining CBCT (Cone-Beam Computed Tomography) image information and oral scan information among the orthodontic diagnostic information received through the above data transmission and reception unit.

[0014] In addition, the processor unit is characterized by controlling the data transmission and reception unit to confirm the tooth movement stage when the tooth movement information has not changed, and to additionally receive oral scan information during treatment when the orthodontic treatment has not been completed, analyzing the tooth movement stage using the oral scan information during treatment, and when the tooth movement information has changed, modifying the tooth movement stage to perform a mandibular movement simulation applying the condylar inclination angle for each tooth movement stage to generate step-by-step occlusal information, and then repeating the process of generating step-by-step clear aligner manufacturing information according to the step-by-step occlusal information. Effects of the invention

[0015] Through the orthodontic planning method using a mandibular movement simulation with an overbite angle applied when manufacturing a clear aligner according to the present invention and the orthodontic planning device implementing the same, occlusal safety can be improved through orthodontic treatment that reflects the individual's mandibular movement characteristics, and temporomandibular joint disorders can be prevented, the accuracy of tooth movement treatment planning can be improved, and the frequency of remanufacturing of clear aligners can be reduced.

[0016] In addition, to determine the stages and goals of clear aligner treatment, it is possible to simultaneously evaluate how mandibular movement changes as teeth continuously evolve step by step, thereby determining the treatment goals and tooth movement stages to achieve a functional occlusal state for each patient.

[0017] Furthermore, not only mandibular movement but also changes in the occlusal points of the teeth can be observed without jaw movement when reproducing mandibular movement, thereby allowing for the improvement of abnormal tooth contact and interference during the tooth movement phase.

[0018] The present invention can improve the occlusal relationship by not only determining the tooth movement stage through mandibular movement but also simultaneously evaluating the condition of the tooth roots and alveolar bone. Brief explanation of the drawing

[0019] FIG. 1 is a flowchart for explaining a tooth orthodontic method according to an embodiment of the present invention, FIG. 2a is a drawing illustrating a CBCT image for confirming the condylar inclination angle of a patient in an orthodontic method according to an embodiment of the present invention. FIGS. 2B and 2C are drawings showing the angle of condylar inclination used in an orthodontic method according to an embodiment of the present invention. FIGS. 3a and 3b are drawings showing a simulation of mandibular movement in an orthodontic method according to an embodiment of the present invention, and FIG. 4 is a block diagram showing the schematic configuration of an orthodontic planning device that implements an orthodontic method according to an embodiment of the present invention. Specific details for implementing the invention

[0020] The features and effects of the present invention described above will become clearer through the following detailed description in conjunction with the attached drawings, and accordingly, a person skilled in the art to which the present invention pertains will be able to easily implement the technical concept of the present invention.

[0021] The present invention is capable of various modifications and may take various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the invention to the specific disclosed forms, and it should be understood that the invention includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention.

[0022] Throughout the specification, when a part is described as 'comprising' a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components, and it should be understood that this does not preclude in advance the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0023] In this specification, the term "~part" includes a unit realized by hardware, a unit realized by software, and a unit realized using both. Additionally, one unit may be realized using two or more hardware, and two or more units may be realized by one hardware.

[0024] Hereinafter, with reference to the attached drawings, a method for orthodontic treatment using a personalized clear aligner manufactured by reflecting mandibular movement information according to a preferred embodiment of the present invention and an orthodontic planning device implementing the same (hereinafter referred to as the 'orthodontic treatment method and orthodontic planning device') will be described in detail.

[0025] FIG. 1 is a flowchart for explaining a dental orthodontic method according to an embodiment of the present invention, FIG. 2a is a diagram illustrating a CBCT image for confirming the condylar inclination angle of a patient in a dental orthodontic method according to an embodiment of the present invention, FIG. 2b and FIG. 2c are diagrams showing the condylar inclination angle used in a dental orthodontic method according to an embodiment of the present invention, and FIG. 3a and FIG. 3b are diagrams showing a mandibular movement simulation in a dental orthodontic method according to an embodiment of the present invention.

[0026] According to FIG. 1, first, the patient's orthodontic diagnostic information is collected in an orthodontic planning device (200) (S100). The orthodontic diagnostic information collected here includes radiographic information and clinical photographic information. The radiographic information includes panoramic radiographic information that can identify the alignment of the entire dentition, the jawbone, and the location of teeth that have not yet erupted or wisdom teeth, lateral cephalometric radiographic information that can identify skeletal problems such as the growth direction and relationship of the upper and lower jaws and the inclination of the teeth, and CBCT (Cone-Beam Computed Tomography) image information that can precisely analyze the tooth and skeletal structure in a three-dimensional image. The clinical photographic information includes extraoral photographic information that can identify aesthetic aspects such as facial asymmetry, protruding mouth, and the degree of gum exposure by taking pictures of the patient's face from the front and side and smiling, and oral scan information that can identify the alignment of teeth, the inclination of teeth, the size of teeth, and the presence or absence of cavities within the oral cavity.

[0027] The orthodontic planning device (200) analyzes the orthodontic diagnostic information to determine the patient's condylar inclination angle (S110). That is, the condylar inclination angle is determined by measuring the slope of the path along which the condyle, a protruding joint portion at the end of the mandible, moves within the jaw joint while reproducing the movement of the mandible based on a 3D model of the patient's oral cavity created by combining the CBCT image information and oral scan information exemplified in FIG. 2a among the orthodontic diagnostic information.

[0028] The condylar angle varies from patient to patient and is classified into the sagittal condylar angle and the lateral condylar angle depending on the direction of mandibular movement. As shown in Fig. 2b, the sagittal condylar angle (S) refers to the angle at which the mandibular condyle moves when the mandible is protruded forward. The lateral condylar angle is classified into the medical condylar guidance angle and the Bennett angle. The lateral condylar angle (M) is the angle at which the medial joint of the mandible moves when the mandible is moved sideways, as shown in Fig. 2b, and the Bennett angle (B) is the angle representing the difference between the direction of movement of one condyle and the direction of movement of the opposite condyle when the mandible is moved sideways, as shown in Fig. 2c. Here, the distance the opposite condyle moves is called the Immediate Side Shift (ISS).

[0029] The tooth movement stage is determined through a mandibular movement simulation applying the patient's condylar inclination angle (S120). As exemplified in Fig. 3a, the simulation is started by applying the Bennett angle, ISS, and condylar inclination angle. After predicting the three-dimensional movement path of the tooth and the final occlusal state through the simulation, the tooth movement stage targeting the final occlusal state is determined. Once the simulation is complete, as exemplified in Fig. 3b, the process of moving the tooth from its initial position to the target position is divided into several stages while reproducing the occlusal movement by moving the slider. The occlusal point color for the selected time point is displayed on the tooth model.

[0030] A mandibular movement simulation with an overbite angle applied is performed for each stage of tooth movement to generate step-by-step occlusal information (S130). At this time, occlusal changes according to tooth movement are predicted at each stage, and excessive occlusal force is prevented from being applied. The step-by-step occlusal information includes the accurate occlusal state in the oral cavity, the occlusion of the upper and lower teeth, the type and severity of malocclusion such as crowded teeth, protruding mouth, and deep bite, and data for simulating tooth movement.

[0031] By applying the condylar inclination angle to mandibular movement simulations, occlusal safety and functional rationality can be enhanced. Specifically, through anterior-posterior mandibular movement with the condylar inclination angle applied, it is possible to verify whether anterior guidance occurs and check for disclusion in the posterior region, thereby allowing for correction of posterior depression, anterior extrusion, and anterior labial inclination. Through lateral mandibular movement with the condylar inclination angle applied, working-side guiding teeth and non-working-side tooth contact can be identified, allowing for improvements in tooth position and torque to achieve functional occlusion. Furthermore, through vertical mandibular movement with the condylar inclination angle applied, occlusal contact points and occlusal interference can be verified, enabling correction of the vertical position, torque, and buccolingual position of anterior and posterior teeth to ensure stable occlusion.

[0032] According to the occlusal information for each stage, manufacturing information for a clear aligner suitable for each stage is generated (S140). That is, the position of the tooth at each stage is calculated to generate 3D model data of the tooth moving to the target point, and design information for a clear aligner is generated according to the 3D tooth model of each stage.

[0033] Additional oral scan data is received during treatment to analyze tooth movement information (S150). The change in 3D coordinates of the teeth to be corrected in the oral scan data during treatment is compared with the previous step to calculate the amount and direction of tooth movement, thereby verifying whether the patient's orthodontic treatment is proceeding as planned. If the tooth movement information changes (S160-Y), the tooth movement step is modified (S170), and steps S130 through S150 are repeated. If the tooth movement information does not change (S160-N), the tooth movement step is finalized (S180).

[0034] If orthodontic treatment is not completed (S190-N), return to step S150 to receive additional oral scan information during treatment and analyze tooth movement information (S150). Steps S130 through S180 are repeated until orthodontic treatment is completed (S190-Y).

[0035] FIG. 4 is a block diagram showing the schematic configuration of an orthodontic planning device (200) that implements an orthodontic method according to an embodiment of the present invention.

[0036] Referring to FIG. 4, the orthodontic planning device (200) of the present invention includes a data transmission and reception unit (210), a storage unit (230), a user command input unit (250), a display unit (270), and a processor unit (290). Each component may be integrated, added, or omitted according to the specifications of the orthodontic planning device (200) actually implemented. That is, as needed, two or more components may be combined into one component, or one component may be subdivided into two or more components. Furthermore, the functions performed in each block are intended to explain the embodiments of the present disclosure, and the specific operations or devices thereof do not limit the scope of the present invention.

[0037] The data transmission / reception unit (210) receives orthodontic diagnostic information generated by an external device (not shown) and transmits clear aligner manufacturing information generated by the orthodontic planning device (200) to a clear aligner manufacturing device such as a 3D printer. The orthodontic diagnostic information received through the data transmission / reception unit (210) includes radiographic information and clinical photographic information. The radiographic information includes panoramic radiographic information that can identify the alignment of the entire dentition, the jawbone, and the location of teeth that have not yet erupted or wisdom teeth; lateral cephalometric radiographic information that can identify skeletal problems such as the growth direction and relationship of the upper and lower jaws and the inclination of the teeth; and CBCT image information that can precisely analyze the tooth and skeletal structure in a three-dimensional image. The clinical photographic information includes extraoral photographic information that can identify aesthetic aspects such as facial asymmetry, protruding mouth, and the degree of gum exposure by taking pictures of the patient's face from the front and side and smiling, and oral scan information that can identify the alignment of teeth, the inclination of teeth, the size of teeth, and the presence or absence of cavities within the oral cavity.

[0038] The storage unit (230) can store data that supports various functions of the orthodontic planning device (200). That is, the storage unit (230) can store multiple applications running on the orthodontic planning device (200), data for the operation of the orthodontic planning device (200), commands, and at least one program command. At least some of these applications may exist on the orthodontic planning device (200) from the time of shipment for the basic functions of the orthodontic planning device (200), or may be downloaded from an external server via wired or wireless communication. The storage unit (230) stores a mandibular movement simulation program and orthodontic diagnostic information received through the data transmission and reception unit (210). In addition, occlusal information for each tooth movement stage generated by the processor unit (290), which will be described later, is stored.

[0039] The user command input unit (250) is a component for receiving user commands and is composed of a user input device such as a mouse, keypad, jog dial, or joystick. Through the user command input unit (250), user commands for performing mandibular movement simulations applying the patient's condylar inclination angle, user commands for determining tooth movement steps, or user commands for transmitting clear aligner manufacturing information are input. Additionally, the patient's condylar inclination angle may be directly input through the user command input unit (250).

[0040] The display unit (270) displays information processed by the orthodontic planning device (200). For example, the display unit (270) displays information on the execution screen of an application running on the orthodontic planning device (200), or UI (User Interface) and GUI (Graphic User Interface) information corresponding to the execution screen information. The display unit (270) may be combined with a touch-type user command input unit (250) to receive user commands. As illustrated in FIG. 2a, CBCT image information for determining the condylar inclination angle is displayed on the display unit (270). Additionally, as illustrated in FIG. 3a, a mandibular movement simulation process with the condylar inclination angle applied is displayed, and as illustrated in FIG. 3b, menus for determining tooth movement stages are displayed.

[0041] The processor unit (290) can control the overall operation of the orthodontic planning device (200) and can provide or process appropriate information or functions by processing signals, data, information, etc. that are input or output through the components of the orthodontic planning device (200) or by running an application program stored in the storage unit (230). In addition, the processor unit (290) can control at least some of the components of the orthodontic planning device (200) to run an application program stored in the storage unit (230). Furthermore, the processor unit (290) can operate at least two or more of the components included in the orthodontic planning device (200) in combination with each other to run an application program.

[0042] The processor unit (290) may be composed of one or more cores and may be any of the various commercial processors. For example, the processor unit (290) may include the device's Central Processing Unit (CPU), General Purpose Graphics Processing Unit (GPUGP), Tensor Processing Unit (TPU), etc. Additionally, the processor unit (290) may be composed of a dual processor or other multi-processor architecture.

[0043] In the present invention, the processor unit (290) determines the patient's condylar inclination angle by analyzing the orthodontic diagnostic information received through the data transmission and reception unit (210). That is, the processor unit (290) determines the condylar inclination angle by measuring the slope of the path along which the condyle, a protruding joint portion at the outermost end of the mandible, moves within the jaw joint while reproducing the movement of the mandible based on a 3D model of the patient's oral cavity created by combining the CBCT image information and oral scan information exemplified in FIG. 2a among the orthodontic diagnostic information.

[0044] Then, the processor unit (290) determines the tooth movement stage through a mandibular movement simulation applying the patient's condylar inclination angle. At this time, the condylar inclination angle may be directly input by the user through the user command input unit (250). The processor unit (290) starts the simulation by applying the Bennett angle, ISS, and condylar inclination angle, as exemplified in FIG. 3a. When the simulation is completed, a menu capable of reproducing occlusal movement is displayed, as exemplified in FIG. 3b.

[0045] The user operates the user command input unit (250) to move the slider to reproduce occlusal movement and divides the process of moving the tooth to be corrected from its initial position to its target position into several stages. At this time, the processor unit (290) performs a mandibular movement simulation with an overbite angle applied for each tooth movement stage to generate occlusal information for each stage. The occlusal information for each stage includes the accurate occlusal state in the oral cavity, the interlocking of the upper and lower teeth, the type and severity of malocclusion such as crowded teeth, protruding mouth, and deep bite, and data for simulating tooth movement.

[0046] The processor unit (290) generates clear aligner manufacturing information for each stage according to the step-by-step occlusal information. That is, it calculates the position of the teeth for each stage to generate 3D model data of the teeth moving to the target point, and generates design information for the clear aligner according to the 3D tooth model of each stage. The generated clear aligner manufacturing information is transmitted to the clear aligner manufacturing device through the data transmission and reception unit (210).

[0047] When additional oral scan data is received during treatment through the data transmission and reception unit (210), the processor unit (290) compares the change in 3D coordinates of the teeth to be corrected in the received oral scan data with the previous stage to calculate the amount and direction of tooth movement and check tooth movement information to see if the patient's tooth correction is proceeding as planned. If the processor unit (290) determines that the tooth movement information has changed, it modifies the tooth movement stage and performs a mandibular movement simulation with an overbite angle applied for each stage to regenerate occlusal information for each stage. Then, the processor unit (290) generates clear aligner manufacturing information suitable for each stage according to the regenerated occlusal information for each stage.

[0048] The processor unit (290) analyzes tooth movement information when additional oral scan information is received during treatment until the orthodontic treatment is completed, and if it is determined that the tooth movement information has changed, it regenerates step-by-step occlusion information to repeat the process of generating clear aligner manufacturing information.

[0049] The foregoing description of the present invention is for illustrative purposes only, and those skilled in the art will understand that other specific forms can be easily modified without altering the technical spirit or essential features of the present invention. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. For example, each component described as a single unit may be implemented in a distributed manner, and components described as distributed may likewise be implemented in a combined form.

[0050] The scope of the present invention is defined by the claims set forth below rather than by the detailed description above, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts thereof should be interpreted as being included within the scope of the present invention. Explanation of the symbols

[0051] 200 : Orthodontic planning device 210 : Data transceiver 230 : Storage section 250 : User command input section 270: Display unit 290: Processor unit

Claims

Claim 1 A method for planning orthodontic treatment using a mandibular movement simulation implemented by an orthodontic planning device, comprising: (a) a step of determining a tooth movement stage through a mandibular movement simulation applying the patient's condylar inclination angle; (b) a step of generating step-by-step occlusal information by performing a mandibular movement simulation applying the condylar inclination angle for each tooth movement stage; and (c) a step of generating step-by-step clear aligner manufacturing information according to the step-by-step occlusal information; and further comprising, prior to step (a), a step of collecting the patient's orthodontic diagnostic information in the orthodontic planning device; and a step of determining the condylar inclination angle by measuring the inclination of the path along which the condyle moves within the temporomandibular joint while reproducing the movement of the mandible based on a 3D model of the patient's oral cavity generated by combining CBCT (Cone-Beam Computed Tomography) image information and oral scan information among the orthodontic diagnostic information. Claim 2 In claim 1, (d) by additionally receiving oral scan information during treatment and calculating the amount and direction of tooth movement by comparing the 3D coordinate change of the tooth to be corrected in the oral scan information with the previous step, A method for planning orthodontic treatment using mandibular movement simulation, further comprising: a step of analyzing the above tooth movement steps; and (e) a step of modifying the tooth movement steps and repeating steps (b) to (d) if the tooth movement information is changed. Claim 3 delete Claim 4 A method for planning orthodontic treatment using mandibular movement simulation, characterized in that, in paragraph 2, it further comprises: (f) a step of determining the tooth movement stage when the tooth movement information has not changed; and (g) a step of returning to step (d) when the orthodontic treatment has not been completed. Claim 5 A method for planning orthodontic treatment using mandibular movement simulation according to claim 1, characterized in that the step-by-step occlusal information includes an accurate occlusal state within the oral cavity, the interlocking of upper and lower teeth, types of malocclusion including crowded teeth, protruding mouth, and deep bite, the relationship with the growth direction of the upper and lower jaws according to the malocclusion, the severity of skeletal problems including tooth inclination, and at least one of Bennett angle, ISS (Immediate Side Shift), and condylar inclination angle as data for simulating tooth movement. Claim 6 An orthodontic planning device for implementing an orthodontic planning method using mandibular movement simulation, comprising: a storage unit for storing a mandibular movement simulation program; a display unit for displaying the mandibular movement simulation; and a user command input unit for inputting a user command for performing the mandibular movement simulation displayed on the display unit and a user command for determining a tooth movement step. The system includes a processor unit that applies the patient's condylar inclination angle to the mandibular movement simulation and displays it on the display unit, performs a mandibular movement simulation applying the condylar inclination angle according to the tooth movement stage determined by the user command to generate step-by-step occlusal information, and then generates step-by-step clear aligner manufacturing information according to the step-by-step occlusal information; and further includes a data transmission and reception unit that receives oral scan information during treatment; wherein the processor unit analyzes the tooth movement stage by calculating the amount and direction of tooth movement by comparing the 3D coordinate change of the tooth to be corrected in the oral scan information with the previous stage using the oral scan information during treatment, and if the tooth movement information changes, modifies the tooth movement stage to perform a mandibular movement simulation applying the condylar inclination angle according to the tooth movement stage to generate step-by-step occlusal information, and repeats the process of generating step-by-step clear aligner manufacturing information according to the step-by-step occlusal information; and among the orthodontic diagnostic information received through the data transmission and reception unit, CBCT (Cone-Beam Computed Tomography). An orthodontic planning device characterized by determining the condylar inclination angle by measuring the inclination of the path along which the condyle moves within the temporomandibular joint while reproducing the movement of the mandible based on a 3D model of the patient's oral cavity generated by combining tomography image information and oral scan information. Claim 7 delete Claim 8 delete Claim 9 In claim 6, the processor unit determines the tooth movement stage when the tooth movement information has not changed, controls the data transmission and reception unit to additionally receive oral scan information during treatment when the orthodontic treatment has not been completed, analyzes the tooth movement stage by calculating the amount and direction of tooth movement by comparing the 3D coordinate change of the tooth to be corrected in the oral scan information with the previous stage using the oral scan information during treatment, and when the tooth movement information has changed, modifies the tooth movement stage, performs a mandibular movement simulation applying the condylar inclination angle for each tooth movement stage to generate step-by-step occlusion information, and then repeats the process of generating step-by-step clear aligner manufacturing information according to the step-by-step occlusion information. Claim 10 An orthodontic planning device according to claim 6, characterized in that the above-mentioned step-by-step occlusal information includes an accurate occlusal state within the oral cavity, the interlocking of upper and lower teeth, types of malocclusion including crowded teeth, protruding mouth, and deep bite, the relationship with the growth direction of the upper and lower jaws according to the malocclusion, the severity of skeletal problems including tooth inclination, and at least one of Bennett angle, ISS (Immediate Side Shift), and condylar inclination angle as data for simulating tooth movement.

Images