Modification method for tooth in digital dental model, recording medium, and apparatus therefor

Abstract

The present invention relates to a method for modifying a tooth in a digital dental model, a recording medium, and an apparatus therefor. The method for modifying a tooth in a dental model, according to the present invention, comprises: generating a center control UI having a plurality of center control points indicating a center of rotation and displaying the center control UI on a landmark on the tooth axis of a tooth selected for modification; generating a movement control UI for input regarding movement and rotation of the identified tooth and displaying the movement control UI on the basis of any one of the plurality of center control points; and if a change of the center of rotation is requested via the center control UI, moving and displaying the movement control UI on the basis of the center control point corresponding to the change request. Accordingly, ease of manipulation in modifying the position of a tooth can be improved, and usability can be enhanced by automatically detecting, as center control points related to the center of rotation, points corresponding to landmarks on each tooth and providing the detected points to a user as selectable options.

Description

Method for modifying teeth in a digital tooth model, recording medium and device thereof

[0001] The present invention relates to a method for correcting teeth in a digital tooth model, a recording medium, and a device therefor, and more particularly, to a method for correcting rotation and movement of teeth in a digital tooth model.

[0002] Dental treatments utilizing digital dental software, such as orthodontics, prosthetics, and dentures, involve acquiring patient data, developing a treatment plan, fabricating prosthetics, performing treatment, and confirming treatment results. During dental diagnosis and treatment planning, dental software is used to modify the patient's teeth on a dental model, aligning them into the desired shape.

[0003] When arranging teeth using this dental software, users can rotate or move individual teeth by manipulating the on-screen GUI (Graphical User Interface). Conventional dental software often has a fixed center of rotation for teeth or offers insufficient options for various user movements, leading to unnecessary manipulation and potentially degraded usability.

[0004] In order to solve the problems described above, the purpose of the present invention is to improve the operability of tooth position correction by moving the tooth correction UI (User Interface) according to the setting of the center of movement or rotation so that the user can easily operate it, and to automatically detect points corresponding to landmarks in each tooth as center control points with respect to the center of rotation and provide them as selection options to the user, thereby improving the usability. In addition, the purpose is to calculate the amount of movement and rotation according to the movement and rotation and display them on the screen to provide them to the user.

[0005] The above object can be achieved by a method for modifying teeth in a digital tooth model performed by a computing device, the method comprising: a step of identifying a selection of teeth to be modified in the digital tooth model; a step of generating a center control UI for designating a center control point that serves as a center of movement or rotation and displaying it on the axis of the identified tooth, and a step of generating a movement control UI for controlling movement and rotation of the tooth and displaying it based on the center control point; a step of identifying a command for rotation or movement input through the movement control UI and displaying the tooth by rotating or moving it; and a step of calculating and displaying the amount of rotation or movement according to the rotation or movement of the tooth.

[0006] Here, if a change of the center is requested through the center adjustment UI, a step of moving and displaying the movement adjustment UI based on the center adjustment point corresponding to the change request may be further included.

[0007] In addition, the center adjustment UI further includes a line representing an axis; and the center adjustment points may include at least three points representing an apex, a root, a cervical, a crown, and an edge on the axis.

[0008] Additionally, the movement control UI may include up, down, left, and right movement keys and clockwise and counterclockwise rotation keys.

[0009] Here, the movement control UI is created in a circular shape centered on the central control point, and the up, down, left, and right direction movement keys and the rotation key can be displayed by overlapping on the circle.

[0010] And, the step of displaying the teeth by rotating or moving them can display the teeth before and after the rotation or movement by overlapping them.

[0011] Additionally, the amount of rotation or the amount of movement can be calculated based on one of the edge or cusp of the tooth, and at least one of the midline, occlusal reference plane, anterior tooth line, and arch line.

[0012] In addition, when the above teeth are displayed in the posterior direction, the amount of lateral movement and rotation based on the midline, and the amount of vertical movement based on the occlusal reference plane are calculated and displayed.

[0013] When the above teeth are displayed in the left and right lateral directions, the forward and backward movement amount based on the anterior tooth line, the rotation amount, and the vertical movement amount based on the occlusal reference plane are calculated and displayed.

[0014] When the above teeth are indicated in the direction of the maxillary and mandibular surfaces, the amount of lateral movement can be based on the midline, the amount of anteroposterior movement can be based on the anterior tooth line, and the amount of movement can be based on the arch line.

[0015] Furthermore, the step of displaying the tooth by rotating or moving the tooth may change the direction in which the tooth is displayed in a direction in which the rotation or movement of the tooth is easily identifiable according to the rotation or movement, and may display the tooth by moving the center adjustment UI and the movement adjustment UI to a changed position corresponding to the changed display direction of the tooth.

[0016] And, when addition or deletion of the central control point on the axis is selected, a step of adding or deleting the central control point on the axis may be further included.

[0017] Additionally, the method may further include a step of displaying data information about the tooth in a table.

[0018] Meanwhile, the above object can be achieved by a device for performing tooth modification in a digital tooth model, comprising a memory and a processor, wherein the processor identifies a selection of a tooth to be modified in the digital tooth model; generates a center control UI for designating a center control point that serves as a center of movement or rotation and displays it on the axis of the identified tooth; generates a movement control UI for controlling movement and rotation of the tooth and displays it based on the center control point; identifies a command for rotation or movement input through the movement control UI and displays the tooth by rotating or moving it; and calculates and displays the amount of rotation or movement according to the rotation or movement of the tooth.

[0019] As described above, the method for correcting teeth in a digital tooth model according to the present invention, the recording medium, and the device thereof improve the operability of tooth position correction by moving the tooth correction UI according to the setting of the center of rotation so as to facilitate user operation, and automatically detects points corresponding to landmarks in each tooth as center control points with respect to the center of rotation and provides them as selection options to the user, thereby improving usability. In addition, the amount of movement and rotation according to movement and rotation can be calculated and displayed on the screen, thereby providing the user with intuitive and accurate measurement values.

[0020] FIG. 1 schematically illustrates the configuration of a device for performing tooth correction in a digital tooth model according to one embodiment of the present invention.

[0021] FIG. 2 is a flowchart of a method for modifying teeth in a digital tooth model according to one embodiment of the present invention.

[0022] FIGS. 3A and 3B illustrate examples of screens for explaining a method of modifying teeth in a digital dental model according to one embodiment of the present invention.

[0023] FIG. 4a is a conceptual diagram for explaining a center adjustment UI according to one embodiment of the present invention, and FIG. 4b illustrates the rotational movement of a tooth when the center of rotation in FIG. 4a is set to the apex, root, cervical, crown, and edge, respectively.

[0024] FIG. 5 illustrates an example of a tooth modification UI according to each rotation center setting according to one embodiment of the present invention.

[0025] FIG. 6 illustrates the amount of movement and a calculation method when the center of rotation is set to the alveolar diameter in tooth #11 according to one embodiment of the present invention.

[0026] Figures 7a and 7b illustrate an example of a screen after tooth movement according to one embodiment of the present invention.

[0027] FIGS. 8A and 8B illustrate examples of frontal views of tooth rotation according to one embodiment of the present invention.

[0028] FIG. 9 illustrates an example of a screen in the right-side direction of tooth rotation according to one embodiment of the present invention.

[0029] FIG. 10 illustrates an example of a screen of the maxillary occlusal plane direction of tooth rotation according to one embodiment of the present invention.

[0030] Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

[0031] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, detailed descriptions of well-known functions or components that may obscure the gist of the present invention will be omitted in the following description and the accompanying drawings. It should also be noted that, where possible, identical components are indicated with the same reference numerals throughout the drawings.

[0032] The terms and words used in this specification and claims described below should not be interpreted as limited to their conventional or dictionary meanings, but should be interpreted with meanings and concepts that conform to the technical idea of ​​the present invention based on the principle that the inventor can appropriately define the concept of the term to best describe his or her invention. Therefore, the embodiments described in this specification and the configurations illustrated in the drawings are merely the most preferred embodiments of the present invention and do not represent all of the technical idea of ​​the present invention. Therefore, it should be understood that there may be various equivalents and modified examples that can replace them at the time of filing this application.

[0033] FIG. 1 schematically illustrates the configuration of a device (100) for performing correction of teeth in a digital dental model according to one embodiment of the present invention. This device (100) is an electronic device capable of executing software for performing orthodontic diagnosis or planning based on dental medical images, and refers to a computing device such as a computer, a notebook computer, a laptop computer, a tablet PC, or a smartphone. The device (100) for performing correction of teeth in a digital dental model according to one embodiment of the present invention can be applied to dental software for performing orthodontic analysis and diagnosis, or planning based on a patient's dental model.

[0034] Referring to FIG. 1, a device (100) for performing tooth correction in a digital tooth model according to one embodiment of the present invention includes a memory (10) in which data and program codes are stored and a processor (20) for executing the same.

[0035] The memory (10) is a recording medium readable from a computing device, and may be configured to include non-volatile memory such as Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), flash memory, volatile memory such as Random Access Memory (RAM), as well as a Hard Disk Drive (HDD), a Solid State Disk (SSD), a removable disk, or any type of computer-readable recording medium well known in the art to which the present invention pertains. The memory (10) stores various data, commands, and / or information. For example, at least one computer program code executed by the processor (20) may be stored. Such computer program code may be loaded into the memory (10) from a floppy drive, disk, memory card, etc. separate from the memory (10) built into the device. The memory (10) stores software for orthodontic diagnosis, and patient dental data, etc. In the present invention, the digital tooth model includes MRI (Magnetic Resonance Imaging), CT (Computerized Tomography), scan data, X-ray, panorama, etc., or a tooth model created therefrom.

[0036] The processor (20) is for executing and processing computer program instructions by performing basic logic, calculation, operation, etc., and may be configured to include at least one of a CPU (Central Processing Unit), an MPU (Micro Processor Unit), an MCU (Micro Controller Unit), a GPU (Graphics Processing Unit), or any other type of processor well known in the technical field of the present invention. The computer program code stored in the memory (10) is loaded into the processor (20) and executed. The processor (20) executes the algorithm stored in the memory (10) to load a medical image of a patient and perform a series of functions such as setting and storing landmarks, correction analysis, and diagnosis.

[0037] As illustrated in FIG. 1, a device (100) for performing a method of modifying teeth in a digital teeth model according to one embodiment of the present invention may further include a display (30) for displaying data and images, a user interface (40) for receiving user input, and a communication interface (50) for linking with the outside.

[0038] The user interface (40) may include, for example, an input device such as a microphone, a keyboard, or a mouse. The communication interface (50) may include, for example, one or more networks among networks (20) such as a personal area network (PAN), a local area network (LAN), a campus area network (CAN), a metropolitan area network (MAN), a wide area network (WAN), a broadband network (BBN), and the Internet.

[0039] Hereinafter, with reference to FIGS. 2 to 10, a method for modifying teeth in a digital tooth model performed by a device (100) (or processor (20)) according to an embodiment of the present invention will be described. FIG. 2 is a flowchart illustrating a method for modifying teeth in a digital tooth model according to an embodiment of the present invention, and FIGS. 3a and 3b illustrate examples of screens for explaining a method for modifying teeth in a digital tooth model according to an embodiment of the present invention.

[0040] When a user executes a computer program according to the present invention through a user interface (40) and selects a digital tooth model of a specific patient on the program screen, the device (100) retrieves the selected digital tooth model from the memory (10) and displays it on the display (30) (S10). (a) of Fig. 3a illustrates a screen displaying a digital tooth model (200) of a patient.

[0041] The user selects a tooth to be modified from a digital tooth model (200) displayed on the screen via a user interface (40) (S11). In the present invention, modification is performed by selecting a single individual tooth. The display and modification of the selected tooth in the digital tooth model (200) can be applied in all directions, including the six directions of the front, back, right side, left side, maxillary occlusal plane, and mandibular occlusal plane.

[0042] Figure 3a (b) is a screen when an individual tooth (201) is selected. When an individual tooth (201) is selected as in Figure 3a (b), only the corresponding tooth (201) may be clearly displayed in the digital tooth model (200) and the remaining teeth may be blurred. The selection of the tooth may be made through the user interface (40), and when the user interface (40) is a mouse, the selected tooth (201) may be left-clicked for more than 1 second to enter the modification state. However, there are no restrictions on the user operation method for selecting the tooth and entering the modification state. In the following embodiment, an example in which the digital tooth model (200) is displayed in the front screen when the #11 tooth (201) is selected will be described.

[0043] When entering the modification state of a tooth (201) through the user interface (40), the device (100) generates a tooth modification UI and displays it on the screen (S12). (a) of Fig. 3b is an example of a screen when entering the modification state of a selected tooth (201), and (b) of Fig. 3b is an enlarged view of a portion of (a) of Fig. 3b including the tooth modification UI.

[0044] The tooth modification UI includes a center adjustment UI (310) for selecting a center of movement or rotation, and a movement adjustment UI (320) for controlling the rotation or movement of the tooth. The center adjustment UI (310) includes a plurality of center adjustment points indicating a center of rotation on the tooth axis. In addition, the center adjustment UI (310) may further include a line indicating the tooth axis. In the center adjustment UI (310), the plurality of center adjustment points that serve as centers of rotation include at least three points among points indicating an apex, a root, a cervical, a crown, and an edge on the tooth axis. The apex, root, cervical, crown, and edge on the tooth axis correspond to landmarks that serve as references in actual orthodontic diagnosis or prosthesis design. In the present embodiment, an example in which all five points described above are displayed on the tooth axis corresponding to such actual landmarks is described.

[0045] The movement control UI (320) is for receiving an input for moving or rotating a tooth with one of a plurality of center control points displayed on the axis of the center control UI (310) as the rotation center, and may include up, down, left, and right movement keys (322), a counterclockwise rotation key (321'), and a clockwise rotation key (321"). The movement control UI (320) is created in a circular shape like a handle with the center control point set as the rotation center as the center, and in order to increase the user's operability, the up, down movement keys and the rotation keys may be gathered and positioned in one area of ​​the circular shape, for example, on the right side.

[0046] When the device (100) enters the correction state of the selected tooth, it identifies the positions corresponding to the axis and the plurality of rotation centers in the selected tooth, generates a center adjustment UI (310), and generates a circular movement adjustment UI (320) centered on a preset rotation center (point) among the plurality of center adjustment points, and displays it at the corresponding position. Here, the center adjustment point preset as the rotation center may be a point designated as the default among five points, or a control point set as the rotation center during a previous operation.

[0047] FIG. 4a is a conceptual diagram for explaining a center adjustment UI (310) according to one embodiment of the present invention, and FIG. 4b illustrates the rotational movement of a tooth (201) when the center of rotation (CR) in FIG. 4a is set to the apex, root, rim, crown, and edge, respectively.

[0048] The apex (point) on the tooth axis is the point located at the end of the root, and refers to the most extreme point in the root direction where the root and the axis overlap. When the tooth (201) is rotated with this point as the center of rotation (CR), controlled tipping of the tooth (201) is possible, as shown in the rotation pattern in FIG. 4b. The root (point) on the tooth axis refers to the midpoint between the cervical and apical root within the root area. When the tooth (201) is rotated with the root as the center of rotation (CR), an uncontrolled tipping pattern in which tooth movement and rotation occur simultaneously appears, as shown in FIG. 4b. This same pattern is observed even when the cervical and crown are the centers of rotation. The cervical (point) on the tooth axis refers to the point where the axis meets the boundary between the crown and the root, and the crown (point) on the tooth axis is the same concept as the root (point), and refers to the midpoint between the cervical and the edge. The edge (point) on the axis refers to the crown-direction extreme point where the crown and axis overlap, which are opposite points to the root apex, and pure root movement is possible when rotating at that position. In the present embodiment, only the center control points indicating five rotation centers are mentioned, but according to another embodiment, the user can add and designate any point located on the axis, and further, of course, the preset center control points can be deleted. In addition, according to one embodiment of the present invention, similar to FIG. 4B, when a tooth (201) is rotated or moved, the tooth in its original position and the tooth after rotation or movement can be displayed together. For example, the tooth before and after rotation or movement can be displayed by emphasizing the edge of the tooth, as in FIG. 4B, or by displaying at least one or more of brightness, saturation, and color differently. This allows the user to easily recognize changes due to rotation and movement.

[0049] When a change in the rotation center is requested through the center adjustment UI (310), the device (100) moves and displays the movement adjustment UI (320) based on the center adjustment point corresponding to the requested change in the rotation center (S14).

[0050] FIG. 5 illustrates an example of a tooth modification UI according to each rotation center setting according to one embodiment of the present invention. In FIG. 5, (a) illustrates a tooth modification UI when the rotation center is an edge on the tooth axis, (b) illustrates a case where the rotation center is a crown, (c) illustrates a case where the rotation center is a tooth rim, (d) illustrates a case where the rotation center is a tooth root, and (e) illustrates a case where the rotation center is a tooth apex. Referring to FIG. 5, the movement control UI (320) moves up and down along the line of the tooth axis according to the rotation center set in the center control UI (310). In this way, in the present invention, when the user sets one of a plurality of center control points on the tooth axis as a desired rotation center, the center of the circular movement control UI (320) moves in real time to the same position as the set rotation center, as shown in FIG. 5, thereby facilitating user operation and intuitive modification.

[0051] When a selection of movement or rotation of a tooth (201) is identified through a movement control UI (320) (S15), the device (100) displays the tooth (201) by moving or rotating it in response to the identified selection (S16). As described above, it is possible to improve the intuitiveness of the user by simultaneously displaying the tooth in the original position and the tooth in the moved position. Meanwhile, tooth movement is possible within the bone arch region (213) displayed simultaneously with individual tooth selection as shown in Drawing 3, and movement or rotation of the tooth axis outside the bone arch region is restricted.

[0052] The device (100) calculates and displays the amount of rotation and movement according to rotation or movement (S17). The amount of rotation and movement can be intuitively displayed on the tooth (201) as in (d) of Fig. 3, or detailed tooth measurement data can be displayed using a separate measurement table.

[0053] For tooth movement to be converted into numerical values ​​and input, there must be a reference point for measurement and measurement. In one embodiment of the present invention, the reference points for measurement are set to include the edge of the anterior teeth, the buccal cusp of the premolar, and the mesiobuccal cusp of the molar. It should be noted that the reference points for measurement can be changed according to the user's preference.

[0054] Looking again at these reference points, when the central control points representing the apex, root, alveolar rim, and crown are set as the rotation center, tooth rotation and movement occur simultaneously, and rotation is applied without tooth movement only when the central control point representing the edge is set as the rotation center. This means that when the same rotation amount is applied, there is a difference in the amount of tooth movement depending on the center of rotation. The present invention displays this difference in movement amount as a numerical value on the display screen and in the measurement table, thereby allowing the user to know the specific difference. The above-mentioned S16 and S17 can be performed simultaneously, and can be displayed in real time simultaneously with the movement, thereby helping the user to intuitively understand the amount of tooth movement and rotation.

[0055] Hereinafter, a method for calculating the amount of tooth movement according to one embodiment of the present invention will be described. The measurement of teeth is based on the edge (or cusp) of each tooth described above, the midline, the occlusal plane, the incisal line, or the arch line. Here, the (mandibular / maxillary) occlusal plane is an occlusal plane set for measuring the position of teeth in three dimensions, and means a plane that is perpendicular to the mid plane and the incisal plane, respectively, and passes between the incisal edges of the mandibular / maxillary #1. This occlusal plane as a standard for tooth measurement is only an example, and the present invention is not limited thereto, and any standard that can generate three-dimensional coordinates for a digital tooth model can be changed.

[0056] In addition, the screen is displayed in three directions: front / rear, left / right, and maxillary / mandibular occlusal planes. In the front / rear direction screen, the transverse translation and translation rotation based on the midline, and the vertical translation based on the occlusal reference plane are quantified. In the left / right direction screen, the sagittal translation and sagittal rotation based on the anterior tooth line, and the vertical movement based on the occlusal reference plane, as in the front / rear view, are quantified. In the maxillary / mandibular direction screen, in addition to the transverse movement based on the midline and the anterior / posterior movement based on the anterior tooth line, the in & out translation and rotation based on the arch line (214) are quantified.

[0057] The movement value represents the shortest distance from each reference line to the edge (or cusp), and the measured distance and the position of the edge (or cusp) are automatically calculated based on the coordinates set within the program. Referring to Fig. 4b, if the edge, which is the reference for measurement, is set as the center of rotation and rotated, only the rotation occurs, and if any point other than the edge is set as the center of rotation, the movement of the edge is accompanied.

[0058] FIG. 6 illustrates the amount of movement and the calculation method when the center of rotation is set to the alveolar ridge in the #11 tooth (201) according to one embodiment of the present invention. Referring to FIG. 6, the edge of the #11 tooth (201) rotated R° with the alveolar ridge as the center of rotation (CR) moves from E to E', so that the tooth (201), which had a distance (measured value) of x mm from the numerical midline (orange line) and y mm from the occlusal reference plane (blue line), moves to a position having a distance of x'mm, y'mm due to the R。 rotation. That is, the measured values ​​on the screen are displayed as x', y', and the amount of movement can be expressed as |x^'-x| changing left and right and |y^'-y| changing up and down.

[0059] Figures 7a and 7b illustrate an example of a screen after a tooth is moved according to an embodiment of the present invention. Figure 7a is a screen before a tooth (201) is moved, and Figure 7b is a screen after a tooth (201) is moved to the left using a left direction movement key (322). Referring to Figures 7a and 7b, a digital tooth model (200) is displayed at the top, and a measurement table (400) including data information about each tooth of the digital tooth model (200) is displayed at the bottom. At this time, the value of the tooth (201) that has entered a correction state is highlighted and displayed on the measurement table (400). The value of the tooth (201) measured by the above-described standard and calculation method is simultaneously displayed on the tooth correction screen at the top and the measurement table (400) at the bottom. As illustrated in Figures 7a and 7b, the measurement table (400) may include measurement data of other teeth in addition to the measurement data of the tooth (201) that has entered a correction state. At this time, the tooth number is indicated on the measurement table (400), and the teeth that have entered the correction state are indicated differently through highlights or colors, so that the user can easily check the measurement data of the teeth that have entered the correction state on the digital tooth model (200) displayed at the top.

[0060] Referring to Figures 7a and 7b, comparing the values ​​before and after the movement of the tooth (201), it can be seen that since only the left movement occurred, the rotation value is the same at 5°, the distance from the edge of the tooth (201) to the occlusal reference plane (211) is also the same at 2.5 mm, and the distance from the edge of the tooth (201) to the midline (210) changed from 3.3 mm to 3.6 mm.

[0061] Meanwhile, according to another embodiment of the present invention, the numerical values ​​of each item of the measurement table (400) linked to the digital tooth model (200) may be provided in a modifiable form. For example, if the numerical values ​​of some of the items on the measurement table (400) are changed through the user interface (40), the device (100) rotates or moves the tooth (201) corresponding to the change by the corresponding numerical value in the digital tooth model (200) displayed at the top and displays it. That is, the modified items in the digital tooth model (200) may be reflected as numerical values ​​in the measurement table (400) and displayed, or conversely, the modified items in the measurement table (400) may be reflected and displayed in the digital tooth model (200). In this way, in the present invention, the rotation or movement of the tooth (201) may be controlled by using the movement control UI (320) or the measurement table (400).

[0062] Figures 8a and 8b illustrate examples of screens in the frontal direction of tooth rotation according to one embodiment of the present invention. Figure 8a is a screen after tooth #11 (201) has rotated around its edge as a rotation center, and Figure 8b is a screen after tooth #11 (201) has rotated around its alveolar ridge as a rotation center. In each case, it can be seen that the measurement values ​​of the tooth (201) changed by rotation are reflected and displayed in the tooth modification screen at the top and the measurement table (400) at the bottom.

[0063] FIG. 9 illustrates an example of a screen in the right-side direction of tooth rotation according to an embodiment of the present invention, and FIG. 10 illustrates an example of a screen in the maxillary occlusal plane direction of tooth rotation according to an embodiment of the present invention. As described above, the reference measurement values ​​are different depending on the direction of the screen. In the screen in the right-side direction of FIG. 9, it can be seen that the forward / backward movement and forward / backward rotation based on the anterior tooth line (215) are numerically displayed, as well as the up / down movement based on the occlusal reference plane (211). In the screen in the maxillary occlusal plane direction of FIG. 10, it can be seen that in addition to the values ​​of the lateral movement based on the midline (210) and the forward / backward movement based on the anterior tooth line, the in / out movement and rotation based on the arch line (214) are numerically displayed.

[0064] This screen orientation can be changed by selection through the user interface (40), or the device can automatically change the screen orientation of the appropriate teeth and display them by identifying a direction in which the teeth are easily rotated or moved as the device rotates or moves. In this case, when the screen orientation of the digital tooth model (200) is changed, the device (100) moves the tooth modification UI to the changed position corresponding to the changed screen orientation and displays it.

[0065] In this way, the present invention can be expected to improve usability and operability by providing a method for setting a rotation center point that can reflect a tooth movement state including various cases to the user.

[0066] In addition, since it moves / rotates by setting the landmark of the tooth on the axis as the center control point rather than simply rotating it indiscriminately in the software, it is expected that it will be possible to suggest directions that can be applied to actual procedures in the future. For example, it will be helpful in selecting a device that targets the same location during bracket orthodontic treatment. In other words, since most of the smart bracket devices currently in use specify the target tooth movement direction and movement amount, it is expected that the combination of the rotation center point derived from this software and the table numerical information can be utilized when selecting a device.

[0067] The present invention can also be implemented in various computer-readable recording media, such as magnetic storage media, optical readable media, and digital storage media, which store computer programs for performing the methods according to the present invention when executed on a computer. Furthermore, the description expressed as steps in the claims is not limited to the order of the steps.

[0068] While several embodiments of the present invention have been described so far, those skilled in the art will appreciate that modifications or substitutions of certain embodiments may be made without departing from the technical spirit of the present invention. Therefore, the scope of protection of the present invention should be deemed to encompass the inventions described in the claims and their equivalents.

Claims

1. In a method of modifying teeth in a digital tooth model performed by a computing device, A step of identifying the selection of teeth to be modified in a digital tooth model; A step of generating a center control UI for designating a center control point that serves as a center of movement or rotation and displaying it on the axis of the identified tooth, and generating a movement control UI for controlling movement and rotation of the tooth and displaying it based on the center control point; A step of identifying a command for rotation or movement input through the above movement control UI and displaying the tooth by rotating or moving it; and A method for modifying teeth in a digital teeth model, characterized by including a step of calculating and displaying the amount of rotation or movement according to the rotation or movement of the teeth.

2. In paragraph 1, A method for modifying teeth in a digital teeth model, characterized in that the method further comprises the step of moving and displaying the movement control UI based on the center control point corresponding to the change request when a change of the center is requested through the center control UI.

3. In paragraph 1, The above center adjustment UI further includes a line indicating the axis; A method for modifying teeth in a digital teeth model, characterized in that the central control point includes at least three points representing an apex, a root, a cervical, a crown, and an edge on the tooth axis.

4. In paragraph 1, A method for modifying teeth in a digital teeth model, characterized in that the above movement control UI includes up, down, left, and right directional movement keys and clockwise and counterclockwise rotation keys.

5. In paragraph 4, A method for modifying teeth in a digital teeth model, characterized in that the above movement control UI is created in a circular shape centered on the central control point, and the up, down, left, and right direction movement keys and the rotation key are displayed while overlapping the circular shape.

6. In paragraph 1, A method for modifying teeth in a digital teeth model, characterized in that the step of displaying the teeth by rotating or moving them is performed by superimposing the teeth before and after the rotation or movement.

7. In paragraph 1, A method for modifying teeth in a digital tooth model, characterized in that the amount of rotation or the amount of movement is calculated based on one of the edge or cusp of the tooth, and at least one of the midline, occlusal reference plane, anterior tooth line, and arch line.

8. In paragraph 7, When the above teeth are displayed in the posterior direction, the amount of lateral movement and rotation based on the midline, and the amount of vertical movement based on the occlusal reference plane are calculated and displayed. When the above teeth are displayed in the left and right lateral directions, the amount of forward and backward movement based on the anterior tooth line, the amount of rotation, and the amount of up and down movement based on the occlusal reference plane are calculated and displayed. A method for modifying teeth in a digital teeth model, characterized in that the above teeth are displayed in the direction of the maxillary and mandibular surfaces, the amount of lateral movement based on the midline, the amount of anteroposterior movement based on the anterior tooth line, and the amount of movement based on the arch line.

9. In paragraph 1, The step of rotating or moving the above teeth is: A method for modifying teeth in a digital teeth model, characterized in that the direction in which the teeth are displayed is changed in a direction in which the rotation or movement of the teeth is easily identifiable according to the rotation or movement, and the center adjustment UI and the movement adjustment UI are moved to a changed position corresponding to the changed display direction of the teeth and displayed.

10. In paragraph 1, A method for modifying a tooth in a digital tooth model, characterized in that it further includes a step of adding or deleting the central control point on the tooth axis when addition or deletion of the central control point on the tooth axis is selected.

11. In paragraph 1, A method for modifying teeth in a digital teeth model, characterized in that it further includes a step of displaying data information about the teeth in a table.

12. A computer-readable recording medium having recorded thereon a program for performing a method of correcting teeth in a digital teeth model according to Article 1.

13. In a device for performing tooth correction in a digital tooth model, Including memory and processor, The above processor, Identify the selection of teeth to be modified from the digital tooth model; A center control UI is created to designate a center control point that serves as the center of movement or rotation, and is displayed on the axis of the identified tooth, and a movement control UI is created to control movement and rotation of the tooth, and is displayed based on the center control point; Identifying a command for rotation or movement input through the above movement control UI and displaying the tooth by rotating or moving it; and A device characterized in that it calculates and displays the amount of rotation or movement according to the rotation or movement of the above teeth.

14. In paragraph 13, The above processor, A device further characterized in that, when a change of the center is requested through the center adjustment UI, the device further includes moving and displaying the movement adjustment UI based on the center adjustment point corresponding to the change request.

15. In paragraph 13, The above center adjustment UI further includes a line indicating the axis; A device characterized in that the central control point includes at least three points representing the apex, root, cervical, crown, and edge on the axis.

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