Apparatus for establishing orthodontic treatment plan and method for generating clear aligner insertion path by using same

Abstract

Disclosed are an apparatus for establishing an orthodontic treatment plan and a method for generating a clear aligner insertion path. The apparatus for establishing an orthodontic treatment plan and the method for generating a clear aligner insertion path, according to an embodiment of the present invention, generate and display multiple insertion paths including a first insertion path of an anterior teeth region and a second insertion path of a posterior teeth region, by using the teeth axes of individual teeth. Accordingly, user convenience can be improved by minimizing manipulation required for a user to establish a treatment plan.

Description

Orthodontic treatment planning device and method for creating a transparent aligner insertion device using the same

[0001] The present invention relates to image analysis and processing technology, and more specifically, to a technology for establishing a digital dental orthodontic treatment plan through image analysis.

[0002] One type of orthodontic treatment is wire orthodontics. Wire orthodontics utilizes the strength (elasticity) of the wire material, providing a fast and reliable method of correction. Brackets are attached to the wire to provide corrective force in the intended direction. As technology advances, brackets are now being given additional functionality, allowing for correction without the use of wires. A variety of bracket types are available.

[0003] Although bracket technology has advanced significantly, patients increasingly prefer aesthetically pleasing treatment options over technical expertise. Consequently, the number of patients opting for clear aligner treatment has increased.

[0004] Clear aligners are a type of orthodontic treatment that uses clear, reinforced plastic braces to move teeth. Unlike traditional wire-based braces, which are fixed, clear aligners are made of plastic, allowing patients to attach and remove them themselves, resulting in superior aesthetic results.

[0005] The present invention proposes an orthodontic treatment plan establishment device and a method for creating a transparent aligner insertion path, which improve user convenience by minimizing user operations for setting a transparent aligner insertion path when establishing a treatment plan.

[0006] A method for generating a transparent aligner insertion path according to one embodiment includes the steps of segmenting individual teeth from a patient's dental image data, setting a tooth axis for generating a transparent aligner insertion path for the segmented individual teeth, generating setup model data in which the segmented individual teeth are moved to a movement target point according to an orthodontic treatment plan, generating multiple insertion paths including a first insertion path in an anterior region and a second insertion path in a posterior region for attaching and removing a transparent aligner using the tooth axis of each individual tooth in the setup model data, and displaying the generated multiple insertion paths in the setup model data.

[0007] The step of generating multiple insertion paths may include a step of calculating an axial average value for individual teeth included in an anterior region and generating a first insertion path having the calculated axial average value, and a step of calculating an axial average value for individual teeth included in a posterior region and generating a second insertion path having the calculated axial average value.

[0008] In the step of creating multiple insertion paths, a first insertion path can be created at the center position of individual tooth axes in the anterior region in the occlusal plane of the setup model data, and a second insertion path can be created in the left and right posterior regions in the occlusal planes on the left and right sides of the setup model data, respectively.

[0009] The method for creating a transparent aligner insertion path may further include at least one of a step of creating and displaying an undercut area for each tooth based on a first insertion path within an anterior region, and a step of creating and displaying an undercut area for each tooth based on a second insertion path within a posterior region.

[0010] The method for creating a transparent aligner insertion path may further include at least one of a step of creating and displaying a first insertion plane perpendicular to a first insertion path and a step of creating and displaying a second insertion plane perpendicular to a second insertion path.

[0011] In the step of generating and displaying the second insertion plane, when displaying each side, a plane perpendicular to the second insertion paths of the left and right molar regions on the left and right occlusal surfaces of the setup model data is generated as the second insertion plane, respectively, and when displaying both sides together, an additional average value can be calculated for the second insertion paths of the molar regions on both sides on the occlusal surfaces of the setup model data, and a plane perpendicular thereto can be generated as the second insertion plane.

[0012] The method for creating a transparent aligner insertion path may further include a step of modifying the created insertion path by a user operation signal using a manipulator.

[0013] The manipulator includes a guide interface and an angle correction interface arranged around the guide interface, and the angle correction interface may include at least one of a front angle correction interface, a rear angle correction interface, a left angle correction interface, and a right angle correction interface.

[0014] The angle correction interface may further include an initialization interface for initializing the insertion path generated and displayed by the orthodontic treatment planning device.

[0015] The step of modifying may include a step of displaying a manipulator on an insertion plane of an anterior region or a posterior region, a step of receiving a user operation signal for selecting a predetermined angle modification interface within the manipulator, a step of modifying an insertion path angle in predetermined angle units based on the insertion plane according to a predetermined angle unit set when the user operation signal is received, and a step of displaying an insertion path with a modified insertion path angle.

[0016] The step of modifying may further include a step of setting a modification range by insertion and modifying within the set modification range by insertion.

[0017] The range of correction for insertion is set based on the axial angle of each tooth in the current and previous correction stages for each individual tooth whose tooth movement has been confirmed.

[0018] For individual teeth with movement, the insertion correction range can be set based on the deviation of the individual tooth axis angle of the current correction stage compared to the insertion angle created in the current correction stage, and the deviation between the individual tooth axis angles of the previous correction stage and the current correction stage.

[0019] The range of correction for insertion can be set based on the axial angle of the individual tooth with the maximum axial angle within the current orthodontic stage area, in the case of individual teeth without tooth movement.

[0020] In the modification step, the insertion plane and manipulator may be fixed to the screen while the setup model data is updated and displayed by rotating the insertion path by the modified angle, or the setup model data may be updated and displayed by rotating the insertion path by the modified angle while the insertion path is fixed to the screen.

[0021] The method for generating a transparent aligner insertion path may further include a step of checking whether there is residual setup model data, and a step of repeatedly performing multiple insertion path generation for each setup model data until there is no residual setup model data.

[0022] According to another embodiment, a dental orthodontic treatment planning device includes a data acquisition unit that acquires dental image data of a patient, a control unit that segments individual teeth from the dental image data of the patient, sets a tooth axis for generating a transparent aligner insertion path for the segmented individual teeth, generates setup model data in which the segmented individual teeth are moved to a movement target point according to the orthodontic treatment plan, and generates multiple insertion paths including a first insertion path in an anterior region and a second insertion path in a posterior region for attaching and detaching a transparent aligner using the tooth axis of each individual tooth in the setup model data, and a display unit that displays the generated multiple insertion paths in the setup model data.

[0023] According to one embodiment, the orthodontic treatment planning device and the method for generating a clear aligner insertion path can improve user convenience by minimizing user operations for treatment planning. For example, the orthodontic treatment planning device can automate the process of setting a clear aligner insertion path when establishing a treatment plan, thereby minimizing user intervention steps, thereby improving user convenience and improving processing speed. In addition, the user does not need to individually set an insertion path suitable for each tooth model data.

[0024] Figure 1 is a drawing showing the configuration of an orthodontic treatment planning device according to one embodiment of the present invention;

[0025] Figure 2 is a drawing showing the flow of a method for creating a transparent aligner insertion according to an embodiment of the present invention.

[0026] FIG. 3 is a drawing for explaining a method for setting the axis of an individual tooth according to one embodiment of the present invention;

[0027] FIG. 4 is a drawing showing the process of creating an insertion path and an insertion plane in an anterior region and a posterior region according to an embodiment of the present invention through a screen.

[0028] FIG. 5 is a drawing showing a confirmation screen for individual tooth axes and insertions by region according to one embodiment of the present invention.

[0029] FIG. 6 is a drawing showing a first insertion path modification screen of a pre-existing region according to an embodiment of the present invention;

[0030] FIG. 7 is a drawing showing a screen for modifying a second insertion path in a molar region according to one embodiment of the present invention;

[0031] FIG. 8 is a drawing showing a screen displaying an insertion path and an undercut for the insertion path according to one embodiment of the present invention;

[0032] FIG. 9 is a drawing showing a manipulator for insertion correction according to one embodiment of the present invention;

[0033] FIG. 10 is a drawing showing an insertion correction screen according to the selection of the left and right angle correction interface of the manipulator according to one embodiment of the present invention.

[0034] FIG. 11 is a drawing showing an insertion correction screen according to selection of a front / rear angle correction interface of a manipulator according to an embodiment of the present invention.

[0035] FIG. 12 is a drawing showing the range of insertion correction for a moved tooth according to one embodiment of the present invention.

[0036] The advantages and features of the present invention, and the methods for achieving them, will become clearer with reference to the embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. These embodiments are provided only to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Like reference numerals designate like elements throughout the specification.

[0037] In describing embodiments of the present invention, if it is determined that a detailed description of a known function or configuration may unnecessarily obscure the gist of the present invention, such detailed description will be omitted. The terms described below are terms defined in consideration of functions in embodiments of the present invention, and these may vary depending on the intention or custom of the user or operator. Therefore, the definitions should be made based on the contents throughout this specification.

[0038] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the embodiments of the present invention exemplified below may be modified in various other forms, and the scope of the present invention is not limited to the embodiments described below. The embodiments of the present invention are provided to more fully explain the present invention to those skilled in the art.

[0039] Figure 1 is a drawing showing the configuration of an orthodontic treatment plan establishment device according to one embodiment of the present invention.

[0040] Referring to Figure 1, the orthodontic treatment planning device (1) is an electronic device capable of executing software for establishing treatment plans using digital dentistry in an actual dental clinic. Electronic devices include computers, laptops, tablets, and smartphones.

[0041] In one embodiment, the transparent orthodontic method, which is one of the removable orthodontic methods, includes a data preparation step, a tooth movement plan establishment step, and a device manufacturing step.

[0042] In the data preparation stage, the orthodontic treatment planning device (1) acquires the patient's dental image data and segments the teeth and gums from the acquired dental image data.

[0043] Next, in the tooth movement plan establishment step, the orthodontic treatment plan establishment device (1) generates setup model data in which the divided individual teeth are moved to the movement target point according to the orthodontic treatment plan. The setup model data refers to tooth arrangement data in which teeth are moved to an ideal shape according to the treatment plan by establishing an orthodontic diagnosis and treatment plan before performing orthodontic treatment. The orthodontic treatment plan establishment device (1) can generate each setup model data for each intermediate step according to the orthodontic treatment plan up to the final target setup model data.

[0044] Next, in the device manufacturing step, the orthodontic treatment planning device (1) manufactures transparent braces. The transparent braces are structures made of flexible and transparent plastic materials.

[0045] An orthodontic treatment planning device (1) according to one embodiment automates the process of creating a clear aligner insertion path. The insertion path refers to the direction of attachment and detachment of the clear aligner. Hereinafter, the insertion path refers to the insertion path of the clear aligner. The clear aligner obtains retention force in the undercut area of ​​the tooth formed along the insertion path. The undercut area refers to the area where collision occurs when attaching and detaching the clear aligner.

[0046] The orthodontic treatment planning device (1) can automatically generate an insertion path, first present the result of the insertion path generation to the user, and then provide a process for selectively modifying the path if necessary. Accordingly, the insertion path generation process can be automated, eliminating unnecessary steps requiring user intervention, simplifying the overall orthodontic process.

[0047] Hereinafter, with reference to Fig. 1, the configuration of the orthodontic treatment planning device (1) will be described.

[0048] Referring to FIG. 1, a dental orthodontic treatment plan establishment device (1) according to one embodiment includes a data acquisition unit (10), a storage unit (12), a control unit (14), an input unit (16), and a display unit (18).

[0049] The data acquisition unit (10) acquires dental image data for orthodontic treatment. The dental image data may be scan data, CT (Computed Tomography) data, etc.

[0050] The control unit (14) can establish treatment goals for the patient's orthodontic treatment. For example, it can determine and provide information on the tooth arrangement order to correct the patient's teeth to an ideal shape. Furthermore, it can present measurement results for each problem item that reflect the tooth arrangement goal and the difference from the current condition.

[0051] The control unit (14) can establish a treatment plan to achieve established orthodontic treatment goals. For example, the control unit (14) configures orthodontic treatment steps to address the extracted problem items. The orthodontic treatment steps can be divided according to user-specified tooth movement criteria.

[0052] In one embodiment, a control unit (14) creates an insertion path for orthodontic treatment using a transparent aligner. If the insertion path is created at the user's discretion, the retention force may not be uniform during step-by-step blockouts using the insertion path. This is because the retention force and blockout setting area of ​​the transparent aligner may vary depending on the direction of the insertion path. Blockout refers to the removal of undercuts.

[0053] Furthermore, when creating an insertion path based on the user's personal judgment, the insertion path is created based on the user judgment reference plane. This reference plane refers to the plane viewed by the user from any direction when viewing the setup model data. In this case, because it relies on user judgment, quantifying undercuts for each individual tooth is difficult. Furthermore, setting a consistent insertion path for each intermediate step is difficult and requires repeated work, depending on the user's skill level.

[0054] The control unit (14) according to one embodiment can create 'multiple insertion paths' and can create them simultaneously. 'Multiple insertion paths' means creating at least two insertion paths. When a transparent aligner is worn in the oral cavity, it is usually worn in a diagonal direction from the front to the back and from the occlusal surface of the anterior region to the cervical region of the posterior region. Therefore, the control unit (14) can create multiple insertion paths, including a first insertion path of the anterior region and a second insertion path of the posterior region, based on the setup model data, taking into account the actual insertion and removal direction of the transparent aligner. The insertion path creation process of the control unit (14) will be described below with reference to FIG. 2.

[0055] The display unit (18) displays a screen according to the operation performed by the control unit (14). For example, the display unit (18) may display a screen for creating an insertion path, a screen for modifying a created insertion path, etc. The display unit (18) may receive a predetermined user operation signal through the input unit (16) on the insertion path modification screen to modify the insertion path.

[0056] The input unit (16) receives a user operation signal. For example, the input unit (16) may receive a user operation signal for a user interface displayed on the screen. For example, the input unit (16) receives a user operation signal on an insertion modification screen.

[0057] The storage unit (12) stores various data, such as information required for performing the operation of the dental orthodontic treatment planning device (1) and information generated according to the operation. For example, dental image data of individual patients is stored in the storage unit (12) and can be provided to the control unit (14) upon user request.

[0058] FIG. 2 is a diagram illustrating a flow of a method for generating an insertion path according to an embodiment of the present invention.

[0059] Referring to FIGS. 1 and 2, the orthodontic treatment planning device (1) segments individual teeth from a patient's dental image data (S210). The orthodontic treatment planning device (1) can segment individual teeth based on dental image data, for example, CT data. The orthodontic treatment planning device (1) can segment individual teeth using an artificial neural network of artificial intelligence. For example, the orthodontic treatment planning device (1) can learn individual teeth of a patient based on CT data of previous patients, and then segment individual teeth using the learning results.

[0060] Next, the orthodontic treatment planning device (1) sets the tooth long axis of each divided tooth to create an insertion path (S220). At this time, the orthodontic treatment planning device (1) can set the tooth long axis according to the type of data input before virtually moving the tooth. The tooth long axis refers to the axis of the tooth, and the orthodontic treatment planning device (1) can calculate three-dimensional angle information of the tooth long axis as the tooth long axis information to create an insertion path. The three-dimensional angle information of the tooth long axis includes angulation and torque. Angulation is the mesio-distal inclination of the tooth long axis with respect to the occlusal plane from the front of the tooth. Torque is the bucco-lingual inclination of the tooth long axis with respect to the occlusal plane from the side of the tooth. The orthodontic treatment planning device (1) can calculate two pieces of tooth long axis information, angulation and torque, for each individual tooth. An example of setting the tooth long axis will be described later with reference to FIG. 3.

[0061] Next, the orthodontic treatment planning device (1) generates setup model data that moves the segmented individual teeth to the target point according to the orthodontic treatment plan (S230). The setup model data includes the tooth axis information changed by the movement of the segmented individual teeth.

[0062] The orthodontic treatment planning device (1) can generate final target setup model data that has been moved to the final target point, and can also generate intermediate setup model data according to the movement distance setting. At this time, the target point and movement distance can be set by user operation. The setup model data is generated for each orthodontic step, and there may be multiple sets.

[0063] In addition, in step S230, the orthodontic treatment planning device (1) can generate an intermediate setup model that has been moved to a movement target point. To this end, the orthodontic treatment planning device (1) can segment individual teeth using the user's dental image data in the intermediate state of orthodontic treatment in step S210, set the dental axis of the individual teeth in step S220, and then generate intermediate setup model data based on the user's orthodontic treatment plan in step S230.

[0064] Next, the orthodontic treatment planning device (1) uses the tooth axis of each individual tooth of the setup model data to create multiple insertion paths including a first insertion path in the anterior region and a second insertion path in the posterior region for attaching and detaching transparent aligners (S240). The anterior region is a region including the left and right central incisors to the canines. The posterior region is a region including the left and right first premolars to the second molars. The orthodontic treatment planning device (1) can create a second insertion path and a third insertion path for the posterior region separately on the left and right sides, respectively. The second insertion path and the third insertion path are created in the same way for the left and right posterior regions, respectively, and the same modification method is applied. Hereinafter, a description will be given assuming multiple insertion paths including the first and second insertion paths.

[0065] In step S240, the orthodontic treatment planning device (1) can calculate the axial average value for individual teeth included in the anterior region and create a first insertion path having the calculated axial average value. In addition, the device can calculate the axial average value for individual teeth included in the posterior region and create a second insertion path having the calculated axial average value.

[0066] Here, the mean value may be any one of the arithmetic mean, geometric mean, and harmonic mean. In the present invention, the axial mean value for individual teeth is used, but other values ​​such as variance and standard deviation may be used in addition to the mean.

[0067] Furthermore, the orthodontic treatment planning device (1) calculates an average value for all individual teeth within the anterior or posterior region, but it is also possible to select a specific individual tooth from among all individual teeth within the relevant region and calculate an average value for the selected tooth. Furthermore, a method of assigning a weight to the tooth axis of a specific individual tooth from among all individual teeth is also possible. The first insertion path generation process will be described below with reference to FIGS. 5 to 8.

[0068] Next, the orthodontic treatment planning device (1) displays the generated multiple insertion paths in the setup model data (S250).

[0069] Next, the orthodontic treatment planning device (1) can generate an insertion plane perpendicular to the generated multiple insertion paths in the setup model data (S260). The first insertion path and the second insertion path are expressed as one axis, but this has a disadvantage in that it is not easy to confirm because it is displayed only as a point or a straight line depending on the manipulation action of the user to confirm the data. Therefore, the orthodontic treatment planning device (1) can generate a plane perpendicular to each insertion path, i.e., an 'insertion plane', so that the user can visually confirm the multiple insertion paths from all directions of the data. At this time, the insertion plane is an auxiliary means for visually displaying the insertion paths on the screen, and if there is another method that can visually confirm the insertion paths, the insertion plane can be omitted from the screen.

[0070] Next, the orthodontic treatment planning device (1) can modify the generated multiple insertion paths by a user operation signal using a manipulator (S270). To this end, the orthodontic treatment planning device (1) can display the manipulator on the insertion plane on the occlusal surface as the insertion path for each region. Here, the insertion plane on the occlusal surface represents one of the various orientation screens of the setup model data when entering the insertion plane selection.

[0071] In this case, the user can immediately check the alignment status of the setup model data according to the insertion angle during the modification operation.

[0072] Next, the orthodontic treatment planning device (1) checks whether there is any remaining setup model data (S280), and repeats the aforementioned processes (S240 to S270) until there is no remaining setup model data. That is, the orthodontic treatment planning device (1) creates an insertion path for each setup model data. Similarly, since other setup model data have the axis information of the segmented teeth, insertion path creation (S240), insertion plane creation (S260), and insertion path modification (S270) are possible through the aforementioned procedures. For example, if a certain level of undercut and retention force are given to the insertion path set in the previous step, even if the axis angle is different depending on the tooth movement status in each orthodontic step, a uniform retention force can be given to the setup model data in all orthodontic steps.

[0073] FIG. 3 is a drawing for explaining a method for setting the axis of an individual tooth according to one embodiment of the present invention.

[0074] Referring to FIGS. 1 and 3, the orthodontic treatment planning device (1) sets an axis for creating an insertion path for each divided individual tooth. The orthodontic treatment planning device (1) can set the axis differently depending on whether the input data includes CT data. For example, when CT data is included, the orthodontic treatment planning device (1) divides the crown area (31) and the root area (32) and then sets the extension line connecting the centers of gravity (34, 35) of the two areas (31, 32) as the axis. In contrast, when CT data is not included, the orthodontic treatment planning device (1) divides the crown area (31) and the open area (33) and then sets the extension line (34, 36) connecting the centers of gravity of the two areas (31, 33) as the axis.

[0075] The orthodontic treatment planning device (1) can coordinate not only the three-dimensional rotational movement angle of the tooth axis but also the linear movement distance based on the occlusal plane of the setup model data on the labial surface, buccal surface, lingual surface, mesial surface, and distal surface for each divided individual tooth.

[0076] The orthodontic treatment planning device (1) can produce three-dimensional angular information of the tooth axis as axial information to create an insertion path. The three-dimensional angular information of the tooth axis includes angulation and torque. Angulation is the mesiodistal inclination of the tooth axis with respect to the occlusal plane from the front of the tooth. Torque is the buccolingual inclination of the tooth axis with respect to the occlusal plane from the side of the tooth. The orthodontic treatment planning device (1) can produce two types of axial angular information, angulation and torque, for each individual tooth.

[0077] FIG. 4 is a drawing illustrating a process of creating an insertion path and an insertion plane in an anterior region and a posterior region according to an embodiment of the present invention through a screen.

[0078] Referring to Fig. 4, the orthodontic treatment planning device (1) divides the anterior region and the posterior region into areas based on the positions of individual teeth (410). The anterior region includes the area from the left and right central incisors to the canines. The posterior region includes the area from the left and right first premolars to the second molars.

[0079] Next, the orthodontic treatment planning device (1) sets the axes of individual teeth in the anterior region and sets the axes of individual teeth in the posterior region (420).

[0080] Next, the orthodontic treatment planning device (1) creates a first insertion path in the anterior teeth area and a second insertion path in the posterior teeth area (430).

[0081] To create a first insertion path, the orthodontic treatment planning device (1) can calculate an axial average value for individual teeth included in the anterior region and create a first insertion path having the calculated axial average value.

[0082] For example, the orthodontic treatment planning device (1) calculates the average axial angle values ​​of the angulation and torque of individual teeth within the anterior region. Subsequently, a first insertion path having the average axial angle values ​​of the angulation and torque of individual teeth can be created. At this time, the average axial angle value of the first insertion path can be set to 0º as a default value.

[0083] Likewise, in order to create a second insertion path, the orthodontic treatment planning device (1) can calculate an axial average value for individual teeth included in the molar region and set the calculated axial average value as the second insertion path.

[0084] For example, the orthodontic treatment planning device (1) calculates the average axial angle values ​​of the angulation and torque of individual teeth within the molar region. Subsequently, a second insertion path having the average axial angle values ​​of the angulation and torque of individual teeth can be created. At this time, the average axial angle value of the second insertion path can be set to 0º as a default value.

[0085] The orthodontic treatment planning device (1) can display the first insertion path and the second insertion path created on the setup model data.

[0086] Next, the orthodontic treatment planning device (1) can generate a first insertion plane perpendicular to the first insertion path and a second insertion plane perpendicular to the second insertion path (440).

[0087] The first and second insertion paths are represented by a single axis, but this has the disadvantage of being difficult to confirm because the data is displayed only as points or straight lines depending on the user's manipulation action. Therefore, the orthodontic treatment planning device (1) can create a plane perpendicular to each insertion path, i.e., an "insertion plane," so that the user can visually confirm multiple insertion paths from all directions of the data.

[0088] Next, the orthodontic treatment planning device (1) can display the first insertion path and the first insertion plane, the second insertion path and the second insertion plane together in the setup model data (450).

[0089] Furthermore, the first and second insertion paths set by the orthodontic treatment planning device (1) can be modified by user operation. At this time, the orthodontic treatment planning device (1) can set a modification limit range for the first and second insertion paths. This is because setting the insertion path modification range can prevent treatment failure due to incorrect insertion path settings.

[0090] The orthodontic treatment plan establishment device (1) sets the insertion correction range based on the tooth with the largest axial angle among the individual teeth in each area, but can also set the insertion correction range based on whether or not the individual teeth move within the intermediate setup model data.

[0091] When the average angulation and torque angles for each region, calculated through the above procedure, are displayed three-dimensionally on individual teeth, a single axis is created. Applying the average angulations for the anterior and posterior regions to each individual tooth within each region provides a basis for quantifying the undercuts required for transparent aligner fabrication and for performing blockouts.

[0092] FIG. 5 is a drawing showing a confirmation screen for individual tooth axes and insertions by region according to one embodiment of the present invention.

[0093] The orthodontic treatment planning device (1) provides an insertion path confirmation screen after setting the insertion path. The insertion path confirmation screen includes setup model data viewed from multiple directions. The multiple directions may include the front (5), the back (6), two sides (7), and the occlusal surface (8).

[0094] The orthodontic treatment planning device (1) can generate and display 2 to 3 insertion paths per setup model data. For example, in the case of the anterior region, one first insertion path (50) is generated and displayed, and in the case of the posterior region, one to two second insertion paths (51, 52) are generated and displayed. The orthodontic treatment planning device (1) generates insertion planes corresponding to the number of insertion paths.

[0095] The orthodontic treatment planning device (1) can create and display an anterior undercut area (53) of each tooth based on the first insertion path (50) within the anterior region. Similarly, the orthodontic treatment planning device (1) can create and display an undercut area of ​​each tooth based on the second insertion path (51, 52) within the posterior region.

[0096] FIG. 6 is a drawing illustrating a first insertion path modification screen of a pre-existing region according to one embodiment of the present invention.

[0097] Referring to FIGS. 1 and 6, the first insertion path (50) in the anterior region is located at the center of the individual tooth axes in the anterior region on the occlusal surface of the setup model data. This location coincides with the midline of the setup model data.

[0098] The orthodontic treatment planning device (1) can display the first insertion plane (60) of the anterior region as a vertical plane at the position of the first insertion path (50).

[0099] The orthodontic treatment planning device (1) can display on the screen the anterior undercut area (53) of individual teeth within the anterior region based on the first insertion path (50) of the anterior region so that the user can check it.

[0100] The orthodontic treatment planning device (1) displays a manipulator (61) on the first insertion plane (60) of setup model data in the direction of the occlusal plane, thereby enabling modification of the first insertion path (50) through user operation via the manipulator (61).

[0101] FIG. 7 is a drawing showing a screen for modifying a second insertion path in a molar region according to one embodiment of the present invention.

[0102] Referring to FIGS. 1 and 7, the second insertion paths (51, 52) in the molar region are respectively located at the center of the first premolar to second molar axes on the left and right occlusal surfaces of the setup model data.

[0103] The orthodontic treatment planning device (1) can display the second insertion plane (70) of the molar region as a vertical plane at the position of the second insertion path (51, 52). The second insertion plane (70) of the molar region can be displayed as one or two depending on the program environment settings.

[0104] When displaying each side separately, the orthodontic treatment planning device (1) generates a plane perpendicular to the second insertion path (51, 52) of the left and right molar regions on the left and right occlusal surfaces of the setup model data as a second insertion plane.

[0105] When displaying both sides together, as illustrated in Fig. 7, the orthodontic treatment planning device (1) calculates an additional average value for the second insertion paths (61, 62) of the molar regions on both sides in the occlusal surfaces of the setup model data and creates a plane perpendicular thereto as the second insertion plane (70). At this time, the second insertion plane (70) must be located on the midline of the setup model data.

[0106] The orthodontic treatment planning device (1) can display on the screen the molar undercut area (73) of individual teeth within the molar area based on the second insertion path (51, 52) of the molar area so that the user can check it.

[0107] The orthodontic treatment planning device (1) displays a manipulator (71) on the second insertion plane (70) of setup model data in the direction of the occlusal plane, thereby enabling modification of the second insertion path (51, 52) through user operation via the manipulator (71).

[0108] FIG. 8 is a drawing showing a screen displaying an insertion path and an undercut for the insertion path according to one embodiment of the present invention.

[0109] Referring to FIGS. 1 and 8, the orthodontic treatment planning device (1) can display on the screen the undercut areas of individual teeth within a set area based on the insertion path of the set area so that the user can check them. At this time, the orthodontic treatment planning device (1) can create the undercut area based on the difference between the insertion path angle and the tooth axis angle of the individual teeth.

[0110] For example, as illustrated in Fig. 8, the orthodontic treatment planning device (1) displays the anterior undercut area (53) of individual teeth within the corresponding anterior region on the screen based on the first insertion path (50) of the set anterior region.

[0111] In addition, the orthodontic treatment planning device (1) can display on the screen the molar undercut area (73) of individual teeth within the molar area based on the second insertion path (51, 52) of the set molar area so that the user can check it.

[0112] In Fig. 8, mandibular data is shown as an example, but the same can be applied to maxillary data.

[0113] FIG. 9 is a drawing illustrating a manipulator for insertion correction according to one embodiment of the present invention.

[0114] Referring to FIGS. 1 and 9, the orthodontic treatment planning device (1) can correct the insertion angle by a user operation signal via a manipulator. The insertion angle correction can be performed through insertion plane angle correction, which is easier for the user to identify than the insertion path.

[0115] The manipulator (9) for insertion correction includes a circular guide interface (90) and an angle correction interface placed on the guide interface (90).

[0116] The guide interface (90) may be circular, but need not be circular, and may be provided in the form of a square or other polygon. The center (96) of the guide interface (90) may be positioned so as to coincide with the center of the insertion plane, but the position is not limited thereto.

[0117] The angle correction interface may include a front angle correction interface (91) that adjusts the angle forward based on the occlusal surface, a back angle correction interface (92) that adjusts the angle backward, a left angle correction interface (93) that adjusts the angle to the left, and a right angle correction interface (94) that adjusts the angle to the right.

[0118] Furthermore, the angle correction interface may further include an initialization interface (95) for initializing the insertion path generated and provided by the orthodontic treatment planning device (1). When the user selects the initialization interface (95), the orthodontic treatment planning device (1) is initialized to the initially provided insertion path, ignoring any previous correction work.

[0119] Below, the operation of modifying the insertion path by modifying the insertion plane for each region is described.

[0120] When the orthodontic treatment planning device (1) receives a user operation signal for selecting a predetermined angle modification interface within the manipulator (9), the orthodontic treatment planning device (1) modifies the angle of the insertion plane according to a predetermined angle unit set by the user operation signal. Furthermore, the orthodontic treatment planning device (1) simultaneously changes and displays the insertion angle of the corresponding area. At this time, the insertion angle unit to be modified can be changed according to the user's preferences.

[0121] The orthodontic treatment planning device (1) can set the insertion correction range differently depending on whether individual teeth move within the same area. In this case, the orthodontic treatment planning device (1) can set the insertion correction and undercut indication not to be applied any further for the moving teeth that have first reached the insertion correction range when the insertion correction function for each area is operated, and not to exceed that value.

[0122] The methods for insertion correction in the anterior region and the insertion correction in the posterior region are similar, but in the case of insertion correction in the posterior region, insertion correction can be performed on both sides or on one side. At this time, it is possible to distinguish and indicate whether the center position of the manipulator corresponding to the center of the second insertion plane in the posterior region is on the occlusal surface of the unilateral posterior region or on the midline of the setup model data being worked on.

[0123] As the insertion angle is modified by the insertion path modification function using the manipulator, the insertion plane and the manipulator can be fixed on the screen while the setup model data is rotated and updated by the modified angle in the insertion path. As another example, in the front / back / side directions of the setup model data, the setup model data can be fixed on the screen while the insertion path is rotated and updated by the modified angle. Accordingly, the user can intuitively check the position of the model data according to the insertion direction based on the insertion path and the setup model data. Therefore, the user does not need to separately manipulate and check the position of the data to check the insertion path or undercut.

[0124] FIG. 10 is a drawing showing an insertion correction screen according to selection of a left and right angle correction interface of a manipulator according to an embodiment of the present invention.

[0125] Referring to FIGS. 1, 9 and 10, when the orthodontic treatment planning device (1) receives a user manipulation signal for selecting the left angle correction interface (93) or the right angle correction interface (94) in the manipulator (9), it corrects the insertion plane to the left or right by a predetermined angle unit (e.g., 1º). Furthermore, the orthodontic treatment planning device (1) simultaneously changes and displays the angle of the insertion path (100) of the corresponding area. At this time, the insertion path angle unit to be corrected can be changed according to the user's preferences.

[0126] Please note that the screens before and after modification in Fig. 10 are exaggerated representations of the changes to help understand the present invention.

[0127] FIG. 11 is a drawing showing an insertion correction screen according to selection of a front / rear angle correction interface of a manipulator according to one embodiment of the present invention.

[0128] Referring to FIGS. 1, 9, and 11, when the orthodontic treatment planning device (1) receives a user manipulation signal for selecting the anterior angle correction interface (91) or the posterior angle correction interface (92) within the manipulator (9), the device corrects the insertion plane forward or backward by a predetermined angle unit (e.g., 1º). Furthermore, the orthodontic treatment planning device (1) simultaneously changes and displays the angle of the insertion path (100) of the corresponding area. At this time, the insertion path angle unit to be corrected can be changed according to the user's preferences.

[0129] Please note that the screens before and after modification in Fig. 11 are exaggerated representations of the changes to help understand the present invention.

[0130] FIG. 12 is a drawing showing the range of insertion correction for a moved tooth according to one embodiment of the present invention.

[0131] Referring to FIGS. 1 and 12, the transparent orthodontic treatment method performs treatment by wearing the transparent orthodontic device manufactured in the current orthodontic stage in accordance with the previous orthodontic stage or the patient's current dentition. Accordingly, when the insertion path provided by the orthodontic treatment planning device (1) is modified by user manipulation, the axial angle deviation from the previous orthodontic stage in the current orthodontic stage is taken into account to facilitate axial correction.

[0132] If the insertion angle is corrected without comparison with the previous orthodontic step, the orthodontic force may be excessively transmitted in the area where there is tooth movement induced by the setup, causing the transparent aligner to break, or may be insufficient, making it difficult for the orthodontic treatment to proceed properly. Therefore, the orthodontic treatment planning device (1) can set the insertion angle correction range based on whether or not individual teeth move by comparing the setup model data of the current orthodontic step with the setup model data of the previous orthodontic step so that the intended orthodontic force can be applied to the transparent aligner.

[0133] For example, since the purpose of the orthodontic treatment planning device (1) is to deliver orthodontic force by creating an optimal undercut, the range of insertion path correction is set for each tooth whose movement has been confirmed by considering the created insertion path and whether the tooth has moved compared to the previous orthodontic step. Whether the tooth has moved can be confirmed by changes in the tooth axis angle.

[0134] The orthodontic treatment planning device (1) sets the insertion correction range by considering the 'deviation of the individual tooth axis angle of the current orthodontic stage compared to the insertion angle created in the current orthodontic stage' and the 'deviation between the individual tooth axis angles of the previous orthodontic stage and the current orthodontic stage' for individual teeth with movement. The 'deviation between the individual tooth axis angles' refers to the deviation between the larger and smaller values ​​among the axial angles of individual teeth with movement.

[0135] For example, in the case of '{the insertion angle (120) generated in the current orthodontic step - the deviation (124) between the individual tooth axis angle (122) with the largest value among the axes of individual teeth that have moved in the current orthodontic step} > {the individual tooth axis angle (121) with the largest value among the axes of individual teeth that have moved in the previous orthodontic step - the deviation (125) between the individual tooth axis angle (122) with the largest value among the axes of individual teeth that have moved in the current orthodontic step}', the orthodontic treatment planning device (1) sets the minimum value of 'the deviation (125) between the individual tooth axis angle with the largest value among the axes of individual teeth that have moved in the previous orthodontic step and the individual tooth axis angle with the largest value among the axes of individual teeth that have moved in the current orthodontic step' as the insertion correction range of individual teeth.

[0136] In contrast, in the case where '{the insertion path angle (120) generated in the current correction stage - the deviation (124) between the individual tooth axis angle (122) with the largest value among the axes of individual teeth that have moved in the current correction stage} < {the individual tooth axis angle (121) with the largest value among the axes of individual teeth that have moved in the previous correction stage - the deviation (125) between the individual tooth axis angle (122) with the largest value among the axes of individual teeth that have moved in the current correction stage}', the minimum value of 'the insertion path angle generated in the current correction stage - the individual tooth axis angle deviation (124) with the largest value among the axes of individual teeth that have moved in the current correction stage' is set as the insertion path correction range of individual teeth.

[0137] As another example, in the case of individual teeth without tooth movement, the insertion correction range is set based on the axial angle of the individual tooth with the maximum axial angle within the current orthodontic stage area, thereby preventing the user from setting an excessive insertion angle.

[0138] When modifying an insertion operation based on the insertion plane (123), it is easier for the user to identify it.

[0139] The present invention has been described above, focusing on specific embodiments thereof. Those skilled in the art will appreciate that the present invention can be implemented in modified forms without departing from its essential characteristics. Therefore, the disclosed embodiments should be considered illustrative rather than limiting. The scope of the present invention is set forth in the claims, not the foregoing description, and all differences within the scope equivalent thereto should be construed as being encompassed by the present invention.

Claims

1. In a method for creating a transparent aligner insertion path using an orthodontic treatment planning device, A step of segmenting individual teeth from a patient's dental image data; A step of setting the axis for creating a transparent aligner by inserting it into a split individual tooth; A step of creating setup model data for moving segmented individual teeth to the target point according to the orthodontic treatment plan; A step of creating multiple insertion paths including a first insertion path in the anterior region and a second insertion path in the posterior region for attaching and removing transparent aligners using the axis of each individual tooth of the setup model data; and A step of displaying the generated multiple insertion paths in the above setup model data; A method for producing a transparent aligner insertion device, characterized in that it includes a .

2. In the first paragraph, the step of creating a multiple insertion path is A step of calculating the axial average value for individual teeth included in the anterior region and creating a first insertion path having the calculated axial average value; and A step of calculating an axial average value for individual teeth included in the molar region and creating a second insertion path having the calculated axial average value; A method for producing a transparent aligner insertion device, characterized in that it includes a .

3. In the first paragraph, the step of creating a multiple insertion path is In the occlusal plane of the setup model data, the first insertion path is created at the center position of the individual tooth axes within the anterior region, A method for creating a transparent aligner insertion path, characterized in that a second insertion path is created in the left and right molar regions, respectively, in the occlusal surfaces on the left and right sides of the setup model data.

4. In the first paragraph, the method of creating a transparent aligner insertion A step of creating and displaying an undercut area for each tooth based on the first insertion path within the anterior region; and A step of creating and displaying an undercut area for each tooth based on the second insertion path within the molar area; A method for producing a transparent aligner insert, characterized in that it further comprises at least one of:

5. In the first paragraph, the method of creating a transparent aligner insertion A step of creating and displaying a first insertion plane perpendicular to the first insertion path; and A step of creating and displaying a second insertion plane perpendicular to the second insertion path; A method for producing a transparent aligner insert, characterized in that it further comprises at least one of:

6. In the fifth paragraph, the step of creating and displaying the second insertion plane When displaying each side, a plane perpendicular to the second insertion path of the left and right molar areas on the left and right occlusal surfaces of the setup model data is created as a second insertion plane, respectively. A method for creating a transparent aligner insertion path, characterized in that when displaying both sides together, an additional average value is calculated for the second insertion path of the molar region on both sides from the occlusal surfaces of the setup model data on both sides, and a plane perpendicular thereto is created as the second insertion plane.

7. In the first paragraph, the method of creating a transparent aligner insertion A step of modifying the generated multiple insertion path by a user operation signal using a manipulator; A method for producing a transparent aligner insert, characterized in that it further includes.

8. In paragraph 7, the manipulator It includes a guide interface and an angle correction interface placed on the guide interface, A method for creating a transparent aligner insertion device, characterized in that the angle correction interface includes at least one of a front angle correction interface, a back angle correction interface, a left angle correction interface, and a right angle correction interface.

9. In paragraph 8, the angle correction interface A method for generating a transparent aligner insertion path, characterized in that it further includes an initialization interface for initializing the insertion path generated and displayed by the orthodontic treatment planning device.

10. In paragraph 7, the step of modifying A step of displaying a manipulator on the insertion plane of the anterior or posterior region; A step of receiving a user operation signal for selecting a predetermined angle correction interface within the manipulator; A step of correcting the insertion angle based on the insertion plane according to a set angle unit when receiving a user operation signal; and A step of displaying an insertion path with an angle modified by an insertion path; A method for producing a transparent aligner insertion device, characterized in that it includes a .

11. In paragraph 7, the step of modifying A step of setting a modification range by insertion and modifying within the set modification range by insertion; A method for producing a transparent aligner insert, characterized in that it further includes.

12. In paragraph 11, The range of correction for insertion is set based on the axial angle of each tooth in the current correction stage and the previous correction stage for each individual tooth whose movement has been confirmed. A method for creating a transparent brace insertion path, characterized in that the insertion path correction range is set according to the deviation of the individual tooth axis angle of the current correction stage compared to the insertion path angle created in the current correction stage for individual teeth with movement, and the deviation between the individual tooth axis angles of the previous correction stage and the current correction stage.

13. In paragraph 11, A method for creating a transparent brace insertion path, characterized in that the insertion correction range is set based on the axial angle of an individual tooth with the maximum axial angle within the current orthodontic stage area in the case of an individual tooth without movement.

14. In paragraph 7, the step of modifying A method for creating a transparent aligner insertion path, characterized in that when modifying an insertion path, the insertion plane and the manipulator are fixed to the screen and the setup model data is updated and displayed by rotating the insertion path by the angle modified, or the setup model data is fixed to the screen and the insertion path is updated and displayed by rotating the insertion path by the angle modified.

15. In the first paragraph, the method of creating a transparent aligner insertion A step of checking whether there is residual setup model data; and A step of repeatedly performing generation with multiple inserts for each setup model data until there is no remaining setup model data; A method for producing a transparent aligner insert, characterized in that it further includes.

16. Data acquisition unit for acquiring dental image data of the patient; A control unit that segments individual teeth from a patient's dental image data, sets a tooth axis for creating a transparent aligner insertion path for the segmented individual teeth, creates setup model data in which the segmented individual teeth are moved to a movement target point according to an orthodontic treatment plan, and creates multiple insertion paths including a first insertion path in an anterior region and a second insertion path in a posterior region for attaching and removing the transparent aligner using the tooth axis of each individual tooth in the setup model data; and A display section that displays the generated multiple insertion paths in the setup model data; A dental orthodontic treatment planning device comprising:

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