Method for making a planting surgery plan and device therefor

Abstract

Disclosed are a method for making a planting surgery plan and an apparatus thereof. In the present invention, when making a planting surgery plan, individual teeth are grouped, and crown arrangement information of a target tooth is determined using tooth axis information of teeth belonging to the same tooth group as the target tooth. Accordingly, the accuracy of crown arrangement is improved, and user modification can be minimized.

Description

Technical Field

[0001] This invention relates to dental image data processing technology, and more specifically, to user interface technology for developing implant surgery plans based on dental image data. Background Technology

[0002] When using software to plan implant surgery, the crown and implant are placed by registering the patient's CT data and scan data. Typically, the crown is aligned with the scan data, and the orientation of the implant is determined based on the crown information.

[0003] Commercially available software can manually align crowns in response to user input signals, or align crowns after automating only contact information with adjacent teeth or crowns, and then determine implant placement orientation based on the aligned crowns. Summary of the Invention

[0004] [Technical Issues]

[0005] According to the embodiments, the present invention provides a method and apparatus for developing implant surgery plans, which can improve the accuracy of crown alignment and implant placement while minimizing user modifications.

[0006] [Technical Solution]

[0007] A method for developing an implant surgery plan according to an embodiment includes: segmenting multiple individual teeth from dental image data; grouping the multiple segmented individual teeth according to tooth regions based on tooth number; identifying a group of teeth including a target tooth to which an implant will be placed; determining crown alignment information of the target tooth based on tooth axis information of a reference tooth belonging to the same group of teeth as the target tooth; and aligning the crowns in the dental image data according to the determined alignment orientation.

[0008] In grouping, teeth with the same tooth axis orientation can be grouped based on the tooth angles in normal occlusion.

[0009] In the grouping, teeth can be grouped in the maxillary and mandibular data according to the following tooth regions: the anterior tooth region including teeth 1 and 2, the canine region including tooth 3, the premolar region including teeth 4 and 5, and the molar region including teeth 6 and 7.

[0010] When determining crown alignment information, the tooth axis information of adjacent teeth belonging to the same tooth group as the target tooth can be used to determine the crown alignment information.

[0011] When determining the crown alignment information, the tooth axis information of the teeth opposite the target tooth can be used to determine the crown alignment information.

[0012] When determining crown alignment information, the tooth axis information of teeth belonging to the same tooth group as the teeth opposite the target tooth can be used to determine the crown alignment information.

[0013] When determining the crown alignment information, the tooth axis information of the mesial adjacent teeth of the target tooth can be used to determine the crown alignment information.

[0014] Determining crown alignment information may include: assigning priority in descending order to the tooth axis information of adjacent teeth belonging to the same tooth group as the target tooth, the tooth axis information of the teeth opposite the target tooth, the tooth axis information of teeth belonging to the same tooth group as the target tooth, and the tooth axis information of the mesial adjacent teeth of the target tooth, and using the corresponding tooth axis information to determine crown alignment information according to the assigned priority.

[0015] The method for developing an implant surgery plan may also include receiving a user operation signal for selecting a predetermined reference tooth from dental image data, and determining crown alignment information using the tooth axis information of the selected reference tooth.

[0016] Methods for developing implant surgery plans may also include using crown arrangement information of the target tooth to determine the crown arrangement information of another tooth belonging to the same tooth group as the target tooth.

[0017] Methods for developing implant surgery plans may also include using crown alignment information to determine implant placement information, and placing the implant on a dental image based on the determined implant placement information.

[0018] Methods for developing implant surgery plans may also include providing a manipulator for modifying crown alignment information, and modifying crown alignment information by receiving user operation signals via the manipulator.

[0019] Methods for developing implant surgery plans may also include modifying implant placement information based on modified crown alignment information.

[0020] Methods for developing implant surgery plans may also include providing a user interface for selecting whether to modify implant placement information based on modified crown alignment information.

[0021] According to another embodiment, an apparatus for developing an implant surgery plan includes: a data acquisition module configured to acquire dental image data; a display module configured to display a screen; and a controller configured to: segment a plurality of individual teeth from the acquired dental image data; group the plurality of segmented individual teeth according to tooth regions based on tooth numbers; identify a group of teeth including a target tooth to which an implant will be placed; determine crown arrangement information of the target tooth based on tooth axis information of reference teeth belonging to the same group of teeth; and arrange the crowns in the dental image data using the determined crown arrangement information via the display module.

[0022] [Technical Effects]

[0023] According to the embodiments, the present invention groups individual teeth and, when developing an implant surgery plan, determines the crown arrangement information and implant placement information of the target tooth by using the tooth axis information of teeth belonging to the same tooth group as the target tooth, thereby improving the accuracy of crown arrangement and implant placement and minimizing user modifications. Attached Figure Description

[0024] Figure 1 This is a block diagram illustrating the configuration of an apparatus for developing an implantation surgery plan according to an embodiment of the present invention.

[0025] Figure 2 This is a view showing a dental image data registration screen according to an embodiment of the present invention.

[0026] Figure 3 This is a view showing tooth segmentation in CT data according to an embodiment of the present invention.

[0027] Figure 4 This is a view showing tooth segmentation in scan data according to an embodiment of the present invention.

[0028] Figure 5 This is a view showing a grouping of teeth according to an embodiment of the present invention.

[0029] Figure 6 This is a view showing a screen for selecting the tooth number corresponding to the target tooth for which an implant surgery is planned, according to an embodiment of the present invention.

[0030] Figure 7 This is a view showing an arrangement of tooth crown shapes according to an embodiment of the present invention.

[0031] Figure 8 This is a view showing a screen for determining crown alignment information according to an embodiment of the present invention.

[0032] Figure 9 This is a view showing the arrangement of dental crowns according to an embodiment of the present invention.

[0033] Figure 10 This is a view showing a screen for determining crown alignment information using tooth axis information of contralateral teeth according to an embodiment of the present invention.

[0034] Figure 11 This is a view showing a screen according to an embodiment of the present invention for determining crown alignment information using tooth axis information of teeth belonging to the same tooth group as the teeth opposite to the target tooth.

[0035] Figure 12 This is a view showing a screen for determining crown alignment information using tooth axis information of mesial adjacent teeth of a target tooth according to an embodiment of the present invention.

[0036] Figure 13 This is a view showing a screen for determining crown alignment information using a user operation signal for selecting a reference tooth, according to an embodiment of the present invention.

[0037] Figure 14 This is a view showing the placement of an implant according to an embodiment of the present invention.

[0038] Figure 15 This is a view showing a screen for modifying implants and crowns using a manipulator according to an embodiment of the present invention.

[0039] Figure 16 This is a flowchart illustrating a method for developing an implantation surgery plan according to an embodiment of the present invention. Detailed Implementation

[0040] See below and appendix Figure 1 The advantages and features of the invention, as well as the ways in which these advantages and features are realized, will become apparent from the detailed description of the embodiments herein. However, the invention can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. The embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. The invention is defined only by the scope of the appended claims. Throughout this specification, the same or similar reference numerals denote the same or similar elements.

[0041] In describing exemplary embodiments of the invention, detailed descriptions of related known configurations or functions included herein will be omitted where it is determined that such detailed descriptions might unnecessarily obscure the subject matter of the invention. The terminology described below is defined in consideration of the functionality within the invention and may vary depending on the user, their intent, or their habits. Therefore, the definitions of the terms used herein should conform to the context disclosed herein.

[0042] In the following, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the exemplary embodiments can be modified in various different ways, and the scope of the present invention is not limited to the exemplary embodiments described below. Embodiments of the present invention are provided to assist those skilled in the art in explaining and understanding the invention.

[0043] Figure 1 This is a block diagram illustrating the configuration of an apparatus for developing an implantation surgery plan according to an embodiment of the present invention.

[0044] Reference Figure 1 The device 100 for planning dental implant surgery is an electronic device capable of executing medical image processing programs. The electronic device may include a personal computer (PC), laptop computer, tablet computer, smartphone, etc. Examples of medical image processing programs include guided design programs, scanning programs, CAD programs, etc. Furthermore, the program can be applied not only to dental implant surgery but also to general medical image processing applications.

[0045] The dental image processing procedure using the program may vary depending on the commercially available product, but generally includes: registering the surgical patient; acquiring the registered patient's CT and scan data; registering the CT and scan data; generating an archline based on the registered dental image data and using the archline to generate a panoramic image; arranging crowns in the patient's scan data; placing implants in the patient's CT data; designing the guide shape; and outputting the actual guide. This invention relates to the steps of crown arrangement and implant placement in the above process.

[0046] The apparatus 100 for developing an implantation surgery plan according to an embodiment includes a data acquisition module 101, a storage module 102, a controller 103, an input module 104, a display module 105, and an output module 106.

[0047] Data acquisition module 101 acquires dental image data. Data acquisition module 101 can acquire dental image data via a linked medical imaging device (not shown) or a separate database. Dental image data may include CT data, scan data, etc.

[0048] The scan data can be model scan data obtained by scanning a plaster model formed by taking an impression of the patient's mouth with a 3D scanner, or intraoral scan data obtained by scanning the inside of the patient's mouth with a 3D intraoral scanner.

[0049] Input module 104 receives user operation signals. In this case, input module 104 can receive user operation signals for the user interface displayed on the screen. When the manipulator is displayed on display module 105, input module 104 can receive user operation signals for modification via the manipulator displayed on the screen.

[0050] Display module 105 displays information on the screen. For example, display module 105 can display dental image data on the screen. In this case, dental image data may include scan data and CT data acquired by data acquisition module 101, data obtained by registering at least two types of data, panoramic data generated based on the registered data, etc. Display module 105 can display crowns, implants, drill holes, guides, etc., on the dental image data in an overlay manner. In this case, crowns, implants, drill holes, guides, etc., are virtual objects. Display module 105 can display manipulators so that the user can make modifications via input module 104.

[0051] Output module 106 can use a 3D printer, milling equipment, etc. to output an actual guide plate corresponding to the shape of the virtual guide plate designed by controller 103. Here, the designed implantation surgical guide plate shape can be in a data format compatible with the 3D printer or milling equipment, and the 3D printer or milling equipment can output a physical implantation surgical guide plate based on the input implantation surgical guide plate shape.

[0052] Storage module 102 stores various types of data, such as information required to perform operations of the device 100 for planning implant surgery, and information generated during the execution of operations. For example, storage module 102 may store dental image data of the patient and may provide the dental image data to controller 103 in response to a user request.

[0053] When planning an implant surgery, the controller 103, according to the implementation method, determines the crown arrangement information. The crown arrangement information may include crown position information, orientation information, and size information. Furthermore, the controller 103 can determine implant placement information. Implant placement information may include implant position information, orientation information, and size information. Each piece of orientation information may include angle information.

[0054] To this end, the controller 103 can group multiple individual teeth according to tooth regions determined based on tooth numbers, and can determine crown arrangement information using tooth axis information of reference teeth belonging to the same tooth group. Tooth regions can be classified into anterior tooth regions, canine regions, premolar regions, and molar regions. In this case, considering tooth angles in normal occlusion, the criterion for grouping by tooth region can be whether the tooth axis orientation is the same within a predetermined error range. As used herein, "tooth axis" refers to the extension line connecting the centroids of the crown and root regions after the tooth has been divided into crown and root regions, and corresponds to the longer portion of the tooth, i.e., the "long axis".

[0055] Specifically, the controller 103 segments multiple individual teeth from dental image data. See below for details. Figure 3 and Figure 4 Describe an example of splitting individual teeth.

[0056] Next, the controller 103 groups the multiple segmented individual teeth according to the tooth regions determined based on tooth numbers. The tooth regions include the anterior tooth region, canine region, premolar region, and molar region. (See below for further details.) Figure 5 An example describing tooth grouping.

[0057] Next, the controller 103 identifies a group of teeth including the target tooth to which the implant will be placed, and uses the tooth axis information of teeth belonging to the same group of teeth to determine the crown alignment information of the target teeth. For example, the controller 103 can determine the crown alignment orientation so that the crown alignment orientation is aligned with the tooth axis orientation, and can determine the crown alignment position so that the crown alignment position is aligned with the tooth axis position.

[0058] The controller 103 can determine crown alignment information using the tooth axis information of adjacent teeth belonging to the same tooth group as the target tooth. For example, the controller 103 determines the crown alignment orientation of the target tooth such that the alignment orientation is aligned with the tooth axis orientation of adjacent teeth belonging to the same tooth group. The following will refer to... Figure 8 This describes an implementation method for determining crown alignment information using tooth axis information of adjacent teeth belonging to the same tooth group.

[0059] In another example, controller 103 can determine crown alignment information using the tooth axis information of the teeth opposite the target tooth. For example, controller 103 determines the crown alignment orientation such that the crown alignment orientation is aligned with the tooth axis orientation of the teeth opposite the target tooth. This can be in the case where the tooth axis information of adjacent teeth belonging to the same tooth group as the target tooth is unavailable. See below for further details. Figure 10 This describes an implementation method for determining crown alignment information using tooth axis information of the teeth opposite the target tooth.

[0060] In another example, controller 103 uses the tooth axis information of teeth belonging to the same tooth group as the tooth opposite the target tooth to determine crown alignment information. For example, controller 103 determines the crown alignment orientation of the target tooth crown such that the crown alignment orientation is aligned with the tooth axis orientation of teeth belonging to the same tooth group as the tooth opposite the target tooth. This can be in cases where the tooth axis information of adjacent teeth belonging to the same tooth group as the target tooth is absent, or where the tooth axis information of the opposite tooth is absent. The following will refer to... Figure 11 This describes an implementation method for determining crown alignment information using tooth axis information of teeth in the group to which the contralateral teeth belong.

[0061] In another example, controller 103 determines crown alignment information such that the crown alignment is parallel to the tooth axis of the mesial adjacent tooth of the target tooth. For example, controller 103 determines the crown alignment orientation of the target tooth such that the crown alignment orientation is aligned with the tooth axis orientation of the mesial adjacent tooth of the target tooth. In this case, the mesial adjacent tooth of the target tooth is a tooth that does not belong to the same tooth group as the target tooth. This situation could be due to the absence of tooth axis information for adjacent teeth belonging to the same tooth group as the target tooth, the absence of tooth axis information for teeth on the opposite side of the target tooth, or the absence of tooth axis information for teeth belonging to the same tooth group as teeth on the opposite side of the target tooth.

[0062] The following will refer to Figure 12 This describes an implementation method for determining crown alignment information using the tooth axis information of the mesial adjacent teeth of the target tooth.

[0063] The controller 103 can assign priorities to tooth axis information. For example, the controller 103 can assign priorities in descending order to tooth axis information of adjacent teeth belonging to the same tooth group as the target tooth, tooth axis information of teeth opposite the target tooth, tooth axis information of teeth belonging to the same tooth group as the target tooth, and tooth axis information of teeth mesial adjacent to the target tooth. Therefore, the controller 103 can determine crown arrangement information using the corresponding tooth axis information according to the assigned priorities.

[0064] In another example, controller 103 may receive a user operation signal for selecting a predetermined reference tooth from dental image data, and may use the tooth axis information of the selected reference tooth to determine crown alignment information.

[0065] Next, the controller 103 controls the display module 105 to arrange the crowns in the dental image data according to the determined arrangement orientation.

[0066] The controller 103 can modify the crown alignment information. For example, the controller 103 can display a manipulator for modifying the crown alignment information on a screen via the display module 105, and can modify the crown alignment information by receiving user operation signals from the input module 104 using the manipulator. The following will refer to... Figure 15 (a) describes an example of using a manipulator to modify crown alignment information.

[0067] Next, the controller 103 can determine the implant placement information using the crown alignment information, and can place the implant on the dental image using the determined implant placement information. For example, the implant placement orientation can be determined to be aligned with the crown alignment orientation. Alternatively, the controller 103 can determine the implant placement position to be aligned with the crown alignment position. (See below for further details.) Figure 14 An example describing implant placement.

[0068] The controller 103 can modify implant placement information. In this case, the controller 103 can modify the implant placement information based on the modified crown arrangement information. Furthermore, before modifying the implant placement information, the controller 103 can provide a user interface for selecting whether to modify the implant placement information based on the modified crown arrangement information. The following will refer to… Figure 15 (b) describes an example of modifying implant placement information.

[0069] Figure 2 This is a view showing a dental image data registration screen according to an embodiment of the present invention.

[0070] Reference Figure 1 and Figure 2 The device 100 for planning implant surgery uses the patient's CT data 210 and scan data 220 to arrange structures such as implants, crowns, and abutments. In this case, the implants, crowns, and abutments are virtual objects. Typically, the CT data 210 is used to place the implant while identifying structures that may be risk factors, including the condition of the patient's alveolar bone. The scan data 220 is used to arrange the crowns and design the guide shape.

[0071] When acquiring two types of data, 210 and 220, these two types of data 210 and 220 have different coordinate information. Therefore, as... Figure 2 As shown, the apparatus 100 for developing implant surgery plans performs a registration process that matches coordinate information from two types of data 210 and 220 to generate registered data 230. The registration process may include an automated registration method using artificial intelligence (AI) algorithms based on training data, or a manual registration method using user-operated signals to select one or three points of the tooth in each of the CT data 210 and the scan data 220.

[0072] Figure 3 This is a view showing tooth segmentation in CT data according to an embodiment of the present invention, and Figure 4 This is a view showing tooth segmentation in scan data according to an embodiment of the present invention.

[0073] Reference Figure 1 , Figure 3 and Figure 4 The device 100 for planning implant surgery can segment multiple teeth on CT data 210 or scan data 220. In this case, the device 100 for planning implant surgery can segment multiple teeth using an AI algorithm based on training data. For example, the device 100 for planning implant surgery acquires mask data for each tooth of a patient from previous CT data and forms the acquired mask data into a training dataset to train an artificial neural network model. Next, the device 100 for planning implant surgery acquires the patient's CT data 210 and inputs the CT data 210 into the artificial neural network model to output dental image data in which multiple teeth are segmented.

[0074] Multiple teeth 300 segmented using the patient's CT data 210 include both crown and root information. Multiple teeth 400 segmented using the patient's scan data 220 include only crown information. However, the tooth shape obtained from the scan data 220 may have more accurate shape information than the CT data 210, which may contain metal artifacts.

[0075] The device 100 for planning implant surgery defines multiple segmented teeth as separate objects and assigns tooth numbers to each tooth. For example, as Figure 4 As shown, the device 100 for developing implant surgery plans defines multiple teeth 400 segmented on scan data 220 as individual objects and assigns a tooth number to each segmented tooth 400.

[0076] Figure 5 This is a view showing a grouping of teeth according to an embodiment of the present invention.

[0077] Reference Figure 1 and Figure 5 Once the tooth segmentation and tooth numbering process for dental image data (CT data or scan data) is complete, the device 100 for developing implant surgery plans uses the assigned tooth number information to perform procedures such as... Figure 5 The teeth are grouped as shown.

[0078] For example, the device 100 for developing implant surgery plans performs grouping of teeth in each of the maxillary data 51 and mandibular data 52 of dental image data into anterior regions 510a or 510b including teeth 1 and 2, canine regions 520a or 520b including tooth 3, premolar regions 530a or 530b including teeth 4 and 5, and molar regions 540a or 540b including teeth 6 and 7. In this case, the grouping criterion, taking into account the tooth angles in normal occlusion, could be whether the tooth axis orientation is the same. In this case, the same tooth axis orientation allows for a predetermined range of error. "Normal occlusion" refers to an occlusal state in which the maxillary and mandibular teeth are in maximum contact, and the teeth are considered anatomically normal and do not cause functional problems in the stomatognathic system.

[0079] When arranging crowns for target teeth where implants will be placed, a set of teeth defined in this way is used to determine the orientation of the crowns. For example, an apparatus 100 for planning implant surgery determines the initial orientation of the crowns based on the tooth axis information of a reference tooth in the same set of teeth as the target tooth.

[0080] Figure 6 This is a view showing a screen for selecting the tooth number corresponding to the target tooth for which an implant surgery is planned, according to an embodiment of the present invention.

[0081] Reference Figure 1 and Figure 6 The device 100 for planning implant surgery selects tooth numbers 610, 620, and 630 from dental image data 600 that correspond to the target tooth where the implant will be placed. For example, as... Figure 6 As shown, the device 100 for developing implant surgery plans can determine the tooth number by receiving user operation signals for selecting predetermined teeth 610, 620, and 630. In another example, the device 100 for developing implant surgery plans can determine the tooth numbers 610, 620, and 630 by surgical information linked to a patient management program.

[0082] The device 100 for developing implant surgery plans can prioritize crown alignment for selected teeth, which is the initial operation for implant placement. In this case, the device 100 can manually align the crowns by receiving user operation signals to determine the initial position and orientation of the crowns, or it can automatically align the crowns using a predetermined crown alignment algorithm.

[0083] Figure 7 This is a view showing an arrangement of tooth crown shapes according to an embodiment of the present invention.

[0084] Reference Figure 1and Figure 7 ,like Figure 7 As shown, the device 100 for planning implant surgery loads a crown shape 710 corresponding to a selected tooth number from a crown library 700 and arranges the crown shape 710 within the bounding box 720 of the selected tooth number in the dental image data 700. In this case, the crown shape 710 is arranged to fit the position and size of the bounding box 720.

[0085] Figure 8 This is a view showing a screen for determining crown alignment information according to an embodiment of the present invention.

[0086] Reference Figure 1 and Figure 8 As mentioned above Figure 7 After determining the position and size of the crown shape, the device 100 determines the orientation of the crown shape. In this case, the device 100 for developing an implant surgery plan can determine the crown alignment orientation to be parallel to the tooth axis angle of adjacent teeth belonging to the same tooth group as the selected target tooth. For example, as Figure 8 As shown, when tooth #16, which is included in the molar group, is selected as the target tooth for planned implant surgery, the orientation of the crown 810 of tooth #16 is determined at an angle parallel to the tooth axis of tooth #17 820, which is an adjacent tooth included in the same molar group. In this case, the device 100 for planning the implant surgery can set the tooth axis orientation of the crown 810 of tooth #16 to be parallel to the tooth axis orientation of the adjacent tooth 820 belonging to the same tooth group (e.g., the molar group) in both the side view (a) and the front view (b).

[0087] Figure 9 This is a view showing the arrangement of dental crowns according to an embodiment of the present invention.

[0088] Reference Figure 1 and Figure 9 The device 100 for planning implant surgery arranges and provides crowns 810 on at least one of a 3D dental image data screen (a) and a two-dimensional (2D) dental image data screen (b) based on crown arrangement information, such as Figure 9 As shown. In this case, the device 100 for planning the implant surgery together provides both tooth axis information 822 for the reference tooth 820 and tooth axis information 812 for the crown 810, allowing the user to examine them.

[0089] Figure 10 This is a view showing a screen for determining crown alignment information using tooth axis information of contralateral teeth according to an embodiment of the present invention.

[0090] Reference Figure 1 and Figure 10 The device 100 for planning implant surgery determines crown alignment information such that the tooth axis orientation 1012 of crown 1010 is parallel to the tooth axis orientation 1022 of the contralateral tooth 1020. Here, the contralateral tooth is a normal tooth located on the opposite side of the target tooth relative to the midline 1030. "Opposite side" means that when the target tooth is located in the upper left (left maxillary) region, the contralateral tooth is located in the upper right (right maxillary) region, which is symmetrical to it relative to the midline, and when the target tooth is located in the lower right (right mandibular) region, the contralateral tooth is located in the lower left (left mandibular) region, which is symmetrical to it relative to the midline. For example, in a tooth numbering system that classifies teeth as 10s, 20s, 30s, and 40s by dividing the dentition into four quadrants relative to the midline, the tooth on the opposite side of tooth #17 is tooth #27. Here, in the four-quadrant division, 10s represents the upper left quadrant, 20s represents the upper right quadrant, 30s represents the lower left quadrant, and 40s represents the lower right quadrant.

[0091] As an example of using contralateral teeth to determine crown alignment, such as Figure 10 As shown, when tooth #27 in the molar group is selected as the target tooth for implant placement, the device 100 for planning the implant surgery determines, with a first priority, whether the adjacent tooth #26 1030 belonging to the same molar group is available. When it is determined that tooth #26 1030 is missing and therefore unusable, the device 100 for planning the implant surgery determines, with a second priority, the orientation of the crown 1010 of tooth #27 based on angular information obtained by mirroring the tooth axis orientation of tooth #17 1020, which is the opposite tooth of tooth #27, in a state parallel to the tooth axis orientation.

[0092] Figure 11 This is a view showing a screen according to an embodiment of the present invention for determining crown alignment information using tooth axis information of teeth belonging to the same tooth group as the teeth opposite to the target tooth.

[0093] Reference Figure 1 and Figure 11 The device 100 for planning implant surgery uses the tooth axis information of a reference tooth belonging to the same tooth group as the tooth opposite the target tooth to determine the crown alignment information.

[0094] For example, such as Figure 11As shown, when tooth #26 in the molar group is selected as the target tooth for implant placement, the implant surgery planning device 100 determines, with a first priority, whether the adjacent tooth #27 1130 belonging to the same molar group as the target tooth is available. When it is determined that tooth #27 1130 is missing and therefore unusable, the implant surgery planning device 100 determines, with a second priority, whether the tooth #16 1140 on the opposite side of tooth #26 is available. When it is determined that tooth #16 1140 is missing and therefore unusable, the implant surgery planning device 100 determines, with a third priority, the crown arrangement information of the crown 1110 of tooth #26 using the tooth axis information of tooth #17 1120 belonging to the same tooth group as tooth #16 1140, which is the opposite tooth of tooth #26. For example, the device 100 for planning implant surgery determines the orientation of the crown 1110 of tooth #26 based on angular information obtained by mirroring the tooth axis orientation of tooth #17 1120 in a state parallel to the tooth axis orientation.

[0095] If teeth #26 and #27, both belonging to the molar group, are selected as the target teeth for implant placement, then as follows: Figure 10 and Figure 11 As shown, the crowns 1110 of tooth #26 and 1010 of tooth #27 are arranged in a direction parallel to tooth #17 1120, such that the crown 1110 of tooth #26 is parallel to the crown 1010 of tooth #27, which belongs to the same tooth group.

[0096] Figure 12 This is a view showing a screen for determining crown alignment information using tooth axis information of mesial adjacent teeth of a target tooth according to an embodiment of the present invention.

[0097] Reference Figure 1 and Figure 12 When the tooth axis information of adjacent teeth belonging to the same tooth group as the target tooth, the tooth axis information of the teeth on the opposite side of the target tooth, and the tooth axis information of teeth belonging to the same tooth group as the teeth on the opposite side of the target tooth cannot be used, the device 100 for developing the implant surgery plan uses adjacent teeth that are mesially located for the target tooth. In this case, the adjacent teeth mesially located for the target tooth do not belong to the same tooth group as the target tooth.

[0098] For example, such as Figure 12As shown, when teeth #36, #37, #46, and #47, which form the molar group, are all missing teeth and are selected as target teeth for implant placement, there is no information on the tooth axis for the teeth in the molar group. Therefore, the device 100 for implant surgery planning determines the crown alignment orientation such that the crown 1210 of tooth #36 is parallel to the tooth axis orientation of tooth #35 1250, which is mesially positioned for tooth #36. Subsequently, the device 100 for implant surgery planning determines the crown alignment orientation such that the crown 1220 of tooth #37 is parallel to the crown 1210 of tooth #36.

[0099] Simultaneously, for the crowns 1230 of tooth #46 and 1240 of tooth #47, the device 100 for planning the implant surgery utilizes the tooth axis information of the mesially positioned tooth #45 in the same manner. For example, the device 100 determines the orientation of the crown 1230 of tooth #46 to be parallel to the tooth axis orientation of tooth #45, which is mesially positioned for tooth #46. Next, the device 100 determines the orientation of the crown 1240 of tooth #47 to be parallel to the crown 1230 of tooth #46.

[0100] Prioritization for determining crown alignment information is defined such that when the tooth axis information of adjacent teeth belonging to the same tooth group as the target tooth to which the implant is to be placed is available, the tooth axis information of adjacent teeth within the same tooth group is prioritized as first priority. When the tooth axis information of adjacent teeth belonging to the same tooth group as the target tooth is unavailable, the tooth axis information of the teeth on the opposite side of the target tooth is prioritized as second priority. When the tooth axis information of the opposite tooth is unavailable, the tooth axis information of teeth belonging to the same tooth group as the opposite tooth of the target tooth is used as third priority. When the tooth axis information of adjacent teeth within the same tooth group as the target tooth, the opposite tooth of the target tooth, and the teeth belonging to the same tooth group as the opposite tooth is unavailable, the tooth axis information of adjacent teeth mesially located to the target tooth is used as fourth priority. Here, "unavailable" refers to the case of missing corresponding teeth.

[0101] Figure 13 This is a view showing a screen for determining crown alignment information using a user operation signal for selecting a reference tooth, according to an embodiment of the present invention.

[0102] More specifically, (a) shows an example screen for determining crown alignment information using tooth axis information of adjacent teeth within a tooth group, and (b) shows an example screen for determining crown alignment information using user operation signals for selecting reference teeth.

[0103] Reference Figure 1and Figure 13 As shown in (a), crown alignment information can be automatically determined using a crown alignment algorithm; however, as shown in (b), crown alignment information can be determined by receiving a user operation signal to select a reference tooth for use in crown alignment information and by using the tooth axis information of the selected reference tooth. For example, the crown alignment orientation can be determined to have the same angle as the tooth axis orientation of the reference tooth.

[0104] Therefore, when a target tooth for implant placement is selected, the device 100 for implant surgery planning activates the angle replication function and receives a user operation signal 1340 for selecting a reference tooth 1330 for crown orientation information. Subsequently, the device 100 determines the orientation of the crown 1310 to be parallel to the tooth axis orientation of the selected reference tooth 1330. In this case, the device 100 can determine the orientation of the crown 1310 to have the same orientation as the tooth axis orientation of the reference tooth 1330 selected by the user, regardless of the tooth 1320 belonging to the same tooth group as the target tooth.

[0105] Figure 14 This is a view showing the placement of an implant according to an embodiment of the present invention.

[0106] Reference Figure 1 and Figure 14 Once the crown arrangement information of the target tooth where the implant will be placed is determined, the device 100 for planning the implant surgery uses the crown arrangement information to determine the implant placement information. The implant placement information includes implant placement orientation information and placement location information.

[0107] As an example of determining implant placement information, the apparatus 100 for planning implant surgery determines the implant placement position such that the implant 1420 is placed at a predetermined distance 1450 spaced from the lower end of the gingival margin 1440, which intersects the tooth axis 1430 of the crown 1410 arranged according to the crown alignment information. Subsequently, the apparatus 100 for planning implant surgery determines the placement orientation of the implant 1420 to have the same orientation as the tooth axis 1430 of the crown 1410.

[0108] Figure 15 This is a view showing a screen for modifying implants and crowns using a manipulator according to an embodiment of the present invention.

[0109] More specifically, (a) shows an example image of modifying the position, orientation, and size of a crown using a first manipulator, and (b) shows an example image of modifying the position and orientation of an implant using a second manipulator.

[0110] Reference Figure 1 and Figure 15 The apparatus 100 for planning implant surgery provides a first manipulator 1510 for modifying crown alignment information of crown 1410. Additionally, the apparatus 100 provides a second manipulator 1520 for modifying implant placement information of implant 1420. The first manipulator 1510 may include a user interface for modifying crown alignment information, including the position, orientation, and size of crown 1410. The second manipulator 1520 may include a user interface for modifying implant placement information, including the size, position, and orientation of implant 1420.

[0111] The implant placement information for implant 1420 is determined based on the arrangement information of crown 1410. Therefore, when the crown arrangement information of crown 1410 is modified, the device 100 for planning the implant surgery can provide a user interface that allows the user to select whether to modify the implant placement information of implant 1420 based on the modified crown arrangement information. When the crown arrangement information of crown 1410 is modified and the implant placement information of implant 1420 needs to be modified, the implant placement information of implant 1420 can be modified based on the crown arrangement information of crown 1410. In contrast, when only the crown arrangement information of crown 1410 is modified, the implant placement information of implant 1420 remains unchanged.

[0112] Figure 16 This is a flowchart illustrating a method for developing an implantation surgery plan according to an embodiment of the present invention.

[0113] Reference Figure 1 and Figure 16 The device 100 for planning implant surgery segments multiple individual teeth from dental image data (S1610).

[0114] Subsequently, the device 100 for developing an implant surgery plan groups multiple individual teeth into groups based on tooth number and tooth region (S1620).

[0115] In step S1620, the device 100 for developing an implant surgery plan can group teeth with the same tooth axis orientation based on tooth angles in normal occlusion. For example, the device 100 for developing an implant surgery plan can group teeth in each of the maxillary and mandibular data according to tooth regions including: an anterior tooth region including teeth 1 and 2, a canine tooth region including tooth 3, a premolar tooth region including teeth 4 and 5, and a molar tooth region including teeth 6 and 7.

[0116] Subsequently, the device 100 for developing an implant surgery plan identifies a group of teeth including the target tooth to which the implant will be placed (S1630).

[0117] Subsequently, the device 100 for developing an implant surgery plan determines the crown arrangement information of the target tooth based on the tooth axis information of reference teeth belonging to the same tooth group (S1640).

[0118] In step S1640, the device 100 for developing an implant surgery plan uses the tooth axis information of adjacent teeth belonging to the same tooth group as the target tooth to determine the crown arrangement information.

[0119] In step S1640, when the tooth axis information of adjacent teeth belonging to the same tooth group as the target tooth is unavailable, the device 100 for developing an implant surgery plan can determine the crown alignment information using the tooth axis information of the tooth opposite the target tooth. For example, the crown alignment orientation can be determined such that the tooth axis orientation of the tooth opposite the target tooth is aligned with the crown alignment orientation.

[0120] In step S1640, when the tooth axis information of the adjacent teeth belonging to the same tooth group as the target tooth is not available and the tooth axis information of the teeth on the opposite side of the target tooth is not available, the device 100 for making an implant surgery plan can use the tooth axis information of the teeth belonging to the same tooth group as the opposite side of the target tooth to determine the crown arrangement information.

[0121] In step S1640, when the tooth axis information of the adjacent teeth belonging to the same tooth group as the target tooth is absent, the tooth axis information of the teeth on the opposite side of the target tooth is absent, and the tooth axis information of the teeth belonging to the same tooth group as the opposite side tooth is absent, the device 100 for formulating the implant surgery plan can use the tooth axis information of the mesial adjacent teeth of the target tooth to determine the crown arrangement information.

[0122] In step S1640, the device 100 for developing an implant surgery plan can assign priorities in descending order to the tooth axis information of adjacent teeth belonging to the same tooth group as the target tooth, the tooth axis information of teeth on the opposite side of the target tooth, the tooth axis information of teeth belonging to the same tooth group as the opposite side, and the tooth axis information of teeth mesial adjacent to the target tooth. Therefore, in step S1640, the device 100 for developing an implant surgery plan can determine the crown arrangement information using the corresponding tooth axis information according to the assigned priorities.

[0123] In another example, in step S1640, the device 100 for developing an implant surgery plan can determine crown alignment information by receiving a user operation signal for selecting a predetermined reference tooth from dental image data and using the tooth axis information of the selected reference tooth.

[0124] In step S1640, the device 100 for developing an implant surgery plan can use the crown arrangement information of the target tooth to determine the crown arrangement information of another tooth belonging to the same tooth group as the target tooth.

[0125] Subsequently, the device 100 for developing an implant surgery plan arranges the crowns in the dental image data using the determined crown arrangement information (S1650).

[0126] Furthermore, after step S1650, the device 100 for developing an implant surgery plan can modify the crown alignment information. For example, the device 100 for developing an implant surgery plan can provide a manipulator for modifying the crown alignment information, and can modify the crown alignment information by receiving user operation signals via the manipulator.

[0127] Next, the device 100 for developing an implant surgery plan uses crown alignment information to determine implant placement information and places the implant using the determined placement information (S1660).

[0128] Subsequently, after step S1660, the apparatus 100 for developing an implant surgery plan can modify the implant placement information. For example, the apparatus 100 for developing an implant surgery plan can modify the implant placement information based on the modified crown arrangement information. Before modifying the implant placement information, the apparatus 100 for developing an implant surgery plan can provide a user interface for selecting whether to modify the implant placement information based on the modified crown arrangement information.

[0129] Embodiments of the present invention have been described above. Those skilled in the art will understand that the invention can be implemented in modified forms without departing from its essential characteristics. Therefore, the disclosed embodiments should be considered illustratively rather than restrictively. The scope of the invention is shown in the claims rather than in the foregoing description, and all differences within the equivalent scope should be interpreted as included within the invention.

Claims

1. A method for developing an implant surgery plan using an apparatus for developing implant surgery planning, the method comprising: Segmenting multiple individual teeth from dental image data; The multiple segmented individual teeth are grouped according to tooth region based on tooth number; Identify the group of teeth that includes the target tooth where the implant will be placed; The crown arrangement information of the target tooth is determined based on the tooth axis information of reference teeth belonging to the same tooth group; as well as The crowns are arranged in the dental image data using the determined crown arrangement information.

2. The method according to claim 1, wherein, The grouping includes grouping teeth with the same tooth axis orientation based on tooth angles in normal occlusion.

3. The method according to claim 1, wherein, The grouping includes performing tooth grouping by tooth region in the maxillary and mandibular data, wherein the tooth region includes the anterior tooth region, canine region, premolar region and molar region.

4. The method according to claim 1, wherein, Determining the crown arrangement information includes: using the tooth axis information of adjacent teeth belonging to the same tooth group as the target tooth to determine the crown arrangement information.

5. The method according to claim 1, wherein, Determining the crown alignment information includes: using the tooth axis information of the teeth opposite the target tooth to determine the crown alignment information.

6. The method according to claim 1, wherein, Determining the crown alignment information includes: using the tooth axis information of teeth belonging to the same tooth group as the teeth opposite to the target tooth to determine the crown alignment information.

7. The method according to claim 1, wherein, Determining the crown arrangement information includes: using the tooth axis information of the mesial adjacent teeth of the target tooth to determine the crown arrangement information.

8. The method according to claim 1, wherein, Determining the crown arrangement information includes: Priority is assigned to the tooth axis information of adjacent teeth belonging to the same tooth group as the target tooth, the tooth axis information of the teeth opposite the target tooth, the tooth axis information of teeth belonging to the same tooth group as the opposite tooth, and the tooth axis information of the mesial adjacent teeth of the target tooth in descending order; and The crown arrangement information is determined using the corresponding tooth axis information based on the assigned priority.

9. The method according to claim 1, further comprising: Receive a user operation signal for selecting a predetermined reference tooth from the dental image data; as well as The crown alignment information is determined using the tooth axis information of the selected reference tooth.

10. The method according to claim 1, further comprising: The crown arrangement information of another tooth belonging to the same tooth group as the target tooth is determined by using the crown arrangement information of the target tooth.

11. The method according to claim 1, further comprising: The crown alignment information is used to determine implant placement information, and the implant is placed on the dental image based on the determined implant placement information.

12. The method according to claim 1, further comprising: Provide a manipulator for modifying the crown alignment information; as well as The crown alignment information is modified by receiving user operation signals using the manipulator.

13. The method of claim 12, further comprising: The implant placement information was modified based on the revised crown arrangement information.

14. The method of claim 12, further comprising: Provides a user interface for selecting whether to modify implant placement information based on modified crown alignment information.

15. An apparatus for developing an implantation surgery plan, comprising: Data acquisition module, configured to acquire dental image data; Display module, configured to display a screen; as well as A controller configured to segment multiple individual teeth from acquired dental image data; Based on tooth number, multiple segmented individual teeth are grouped according to tooth region; tooth groups including target teeth for implant placement are identified. The crown arrangement information of the target tooth is determined based on the tooth axis information of a reference tooth belonging to the same tooth group as the target tooth; Then, the crowns are arranged in the dental image data using the determined crown arrangement information via the display module.

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