Visual adjustment method of orthodontic scheme and storage medium

Abstract

The embodiment of the invention relates to the technical field of tooth orthodontics, and discloses a visual adjustment method of an orthodontic scheme and a storage medium. The visual adjustment of the orthodontic scheme comprises the following steps: respectively obtaining step-by-step tooth jaw models corresponding to a plurality of orthodontic steps; generating a corresponding first appliance model according to each step-by-step tooth jaw model; an orthodontic display model of the patient is visually displayed, and the orthodontic display model comprises step-by-step tooth jaw models and corresponding first appliance models worn on the step-by-step tooth jaw models; and after an adjustment instruction is received, adjusting the first appliance model corresponding to the steps according to the adjustment instruction to obtain a second appliance model. When the scheme is provided, the dental model and the appliance model which are worn together are visually displayed together, so that relevant professionals can check the sufficient and intuitive true wearing effect of the appliance, the true wearing effect can be confirmed more finely, meanwhile, a modification function is provided, and the possibility of personalized modification is provided for a user.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of dental orthodontics, and in particular to a method for visually adjusting an orthodontic solution, an electronic device, and a storage medium. Background Art

[0002] In the process of orthodontic digital design, the design basis is the patient's dental model, and then the tooth arrangement design is carried out according to the patient's dental model to obtain a correction plan suitable for the patient. Due to the diversity of patients' physiological characteristics and the personalization of correction needs, the current main method for patients to use artificial tooth arrangement design is not only to have high professional requirements for dentists, but also to be slow. With the development of computer technology, after computer technology was introduced into the field of orthodontics, computers are used to automatically arrange teeth, but due to the large differences between different people, the current automatic tooth arrangement plan still has many shortcomings.

[0003] At present, some solutions are to provide the above automatically obtained correction plan to doctors, patients or other technical personnel for further confirmation in order to determine the rationality of the correction plan. In the prior art, when providing correction plans, text, tables, images, animations, etc. are generally used. Among them, when the animation is displayed, it is generally displayed in the form of a dental model to confirm the position of the patient's teeth after correction. However, since the correction plan may also include accessories added to the braces, local structures of the braces, etc., such as some traction devices, the relevant personnel cannot intuitively see the effect of the braces after wearing them, which often causes patients to discover problems when wearing them, resulting in rework and modification, increasing costs, and extending the time period for patients to receive the braces, or affecting the correction effect. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a visual adjustment method, electronic device and storage medium for an orthodontic plan, which can improve the display effect of the correction plan, provide sufficient judgment basis for relevant personnel, and facilitate accurate adjustment of the correction plan.

[0005] To solve the above technical problems, an embodiment of the present application provides a method for visual adjustment of an orthodontic scheme, comprising: obtaining step-by-step dental and jaw models corresponding to multiple correction steps respectively; generating a corresponding first appliance model according to each step-by-step dental and jaw model; visually displaying the patient's correction display model, wherein the correction display model includes each step-by-step dental and jaw model and a corresponding first appliance model worn on the step-by-step dental and jaw model; after receiving an adjustment instruction, adjusting the corresponding step-by-step first appliance model according to the adjustment instruction to obtain a second appliance model.

[0006] An embodiment of the present application further provides a computer-readable storage medium storing a computer program, which implements the above-mentioned method for visual adjustment of the orthodontic plan when executed by a processor.

[0007] In the implementation manner of the present application, corresponding orthodontic appliance models are obtained respectively according to the step-by-step dental and maxillary models, and the dental and maxillary models and the orthodontic appliance models worn together are visually displayed when providing a solution, so that relevant professional personnel can view sufficient and intuitive actual wearing effects of the orthodontic appliance, allowing doctors, patients and related persons to make more detailed confirmations, and at the same time providing a modification function to provide users with the possibility of personalized modifications.

[0008] In addition, the step-by-step dental and jaw models corresponding to the multiple correction steps are obtained respectively, including: obtaining the initial dental and jaw model of the patient, designing the tooth arrangement according to the initial dental and jaw model, and obtaining the target dental and jaw model of the patient; and performing step-by-step movement design according to the initial dental and jaw model and the target dental and jaw model, and obtaining the step-by-step dental and jaw models corresponding to the multiple correction steps respectively. The method of obtaining the step-by-step dental and jaw models is limited, and it is determined that after obtaining the target dental and jaw model, multiple step-by-step movements in the middle are obtained to ensure that the obtained step-by-step dental and jaw models are accurate.

[0009] In addition, the step-by-step dental model is a grid model; generating a first appliance model according to the step-by-step dental model includes: expanding the step-by-step dental model outward to obtain two single-layer membrane grids respectively; processing the two single-layer membrane grids and the edge lines of the step-by-step dental model to generate two single-layer appliance membrane grids; suturing the edges of the two single-layer appliance membrane grids to obtain the appliance model. The above embodiment defines a generation process of the appliance model, making the generation process simple, accurate, and fast.

[0010] In addition, the adjustment object indicated by the adjustment instruction includes: the edge line in the appliance model and / or the position and posture of the accessories in the appliance model. The above embodiment limits the content that can be carried in the adjustment instruction, so as to provide a rich modification and confirmation method.

[0011] In addition, the adjustment object indicated by the adjustment instruction is the edge line in the appliance model, and the adjustment of the corresponding step-by-step appliance model according to the adjustment instruction includes: providing a number of control points for user operation, the control points are points at preset positions on the edge line, and deforming the edge line according to the coordinates of the control points adjusted by the user; or, providing a receiving window for the user to input a moving direction and a moving distance, and deforming the edge line according to the moving direction and the moving distance received from the receiving window. The above implementation method limits a variety of adjustment methods for the edge line. Since the adjustment of the edge line is widely used, after the relevant adjustment mechanism is defined, automatic adjustment can be achieved when adjustment is needed, so that the overall solution has a higher degree of automation.

[0012] In addition, the receiving window is provided with data verification, and the adjusting the corresponding step-by-step appliance model according to the moving direction and moving distance received from the receiving window includes: when the moving direction and moving distance received in the receiving window meet the data verification, the corresponding step-by-step appliance model is adjusted according to the moving direction and moving distance received from the receiving window. The above implementation method defines a variety of interactive modification methods to provide users with more degrees of freedom.

[0013] In addition, the deformation of the edge line includes: changing the curvature of the wave at a predetermined position on the edge line; or, using a weighted iterative algorithm to deform a predetermined area on the edge line; or, obtaining a reference line formed by connecting the lowest points of the gum lines of all adjacent teeth, moving the reference line vertically downward along the surface of the gum area in the dental model, and using the moved reference line as a new edge line. A variety of deformation methods are specifically defined to adapt to different application scenarios, and to enrich the optional deformation methods.

[0014] In addition, the display of the patient's correction plan includes: displaying each step of the dental and jaw models and the corresponding appliance models in the order of correction time. In the above embodiment, the display is limited to the time sequence, so that the user can confirm the whole process of the correction plan more intuitively and accurately.

[0015] In addition, after determining the step-by-step dental and maxillary models, the first type of accessories are added to each step-by-step dental and maxillary model according to the movement mode between two adjacent steps; the generation of the corresponding first orthodontic appliance model according to each step-by-step dental and maxillary model includes: generating the corresponding first orthodontic appliance model according to the step-by-step dental and maxillary model after adding the accessories; and / or, the generation of the corresponding first orthodontic appliance model according to each step-by-step dental and maxillary model includes: adding the second type of accessories to the first orthodontic appliance model corresponding to each step-by-step dental and maxillary model according to the movement mode between two adjacent steps. The above-mentioned embodiment also stipulates that before displaying the orthodontic display model, the first type of accessories or the second type of accessories can also be added to the step-by-step dental and maxillary model or the orthodontic appliance model, so that the display content is more comprehensive when providing a solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0017] Figure 1 is a flow chart of a method for visually adjusting an orthodontic plan according to one embodiment of the present application;

[0018] Figure 2It is a flowchart of obtaining a step-by-step dental model corresponding to a plurality of correction steps in a visual adjustment method of an orthodontic plan provided according to one embodiment of the present application;

[0019] Figure 3 It is a flow chart of generating a corresponding first appliance model according to each step-by-step dental and jaw model in a visual adjustment method of an orthodontic plan provided according to one embodiment of the present application;

[0020] Figure 4 is a schematic diagram of a step-by-step dental model in a visual adjustment method of an orthodontic plan provided according to one embodiment of the present application;

[0021] Figure 5 is a schematic diagram of an appliance model in a visual adjustment method of an orthodontic solution provided according to one embodiment of the present application;

[0022] Figure 6 is a schematic diagram of a rendered appliance model in a method for visually adjusting an orthodontic plan provided according to one embodiment of the present application;

[0023] Figure 7 It is a schematic diagram of a correction display model in a visual adjustment method of an orthodontic plan provided according to one embodiment of the present application;

[0024] Figure 8 is a schematic diagram of the positions of control points in a method for visually adjusting an orthodontic plan provided according to one embodiment of the present application;

[0025] Fig. 9 is a schematic diagram of the position of the edge line in the visual adjustment method of the orthodontic plan provided according to one embodiment of the present application;

[0026] Fig.10 It is a schematic diagram of another edge line position in a visual adjustment method of an orthodontic plan provided according to one embodiment of the present application. DETAILED DESCRIPTION

[0027] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings. However, it will be appreciated by those skilled in the art that in the present application, many technical details are proposed in order to enable the reader to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical scheme claimed in the present application can also be implemented. The division of the following embodiments is for the convenience of description, and the specific implementation of the present application should not be construed as any limitation, and the various embodiments can be combined and referenced with each other under the premise of no contradiction.

[0028] One embodiment of the present application relates to a method for visual adjustment of an orthodontic solution, which is applied to an electronic device, wherein the electronic device can be a terminal or a server. In this embodiment and the following embodiments, the electronic device is described by taking a server as an example. The implementation details of the method for visual adjustment of an orthodontic solution of this embodiment are described in detail below. The following content is only provided for the convenience of understanding the implementation details and is not necessary for the implementation of this solution.

[0029] The specific process of the visual adjustment method of the orthodontic scheme of this embodiment can be as follows: Figure 1 As shown, including:

[0030] Step 101, respectively obtain step-by-step dental models corresponding to multiple correction steps.

[0031] Specifically, the specific acquisition method in this step can be as follows Figure 2 As shown, specifically including:

[0032] Step 1011, obtain the patient's initial jaw model, perform tooth arrangement design based on the initial jaw model, and obtain the patient's target jaw model. Specifically, the initial jaw model can be the jaw model obtained when the patient is first collected, or it can be the jaw model obtained when the patient is collected at a certain stage. The initial jaw model is only used to distinguish it from the subsequent target jaw model, and does not limit the orthodontic stage of the patient when the model is collected.

[0033] More specifically, the above-mentioned initial dental model can be obtained by taking a mold and scanning, including making a physical tooth model (for example, making a plaster tooth model by taking an impression) according to the state of the patient's teeth at the time of collection, or the state of the teeth and their surrounding tissues (such as gums and facial soft tissues), and then scanning the physical tooth model to generate a virtual tooth model representing the original state of the patient's teeth (corresponding to the basic tooth state). Of course, in actual application scenarios, the image of teeth, or teeth and their surrounding tissues can also be directly obtained by optical scanning, three-dimensional photography, three-dimensional video or medical CT scanning, and the original virtual tooth model can be generated by computer processing. For example, optical scanning can use an intraoral scanner, which is a small invasive optical scanning head that directly obtains the three-dimensional morphology and color texture information of the surface of soft and hard tissues such as teeth, gums, and mucosa in the human mouth, and generates a realistic color dental model.

[0034] To continue, after obtaining the above-mentioned initial dental model, the model can be preprocessed, such as mesh simplification, to reduce the amount of mesh data involved in subsequent calculations and avoid computer memory overflow. In some embodiments, the teeth and gums may be partial models, so the partial models can be merged in the preprocessing stage. If there are undercuts, palates and other parts, they can be combined together, such as using Boolean operations to merge, so that the teeth, gums and other parts become an overall model, which is more conducive to subsequent data processing. It should be noted that in actual applications, when simplifying the mesh, the dental models can be merged and then simplified.

[0035] Furthermore, after obtaining the above-mentioned initial dental model, each tooth and gum part in the dental model can be segmented. Specifically, the geometric features of the dental model can be used to segment the teeth and gums in the dental model. In some embodiments, the spectral clustering method can be further used in combination with the surface color information and geometric feature information of the digitized dental model to segment the teeth and gums in the dental model, wherein not only the tooth area and the gum area can be separated, but also the single tooth in the tooth area can be segmented. Since the surface color information of the dental model is referenced, the above-mentioned embodiment is more accurate in segmenting the teeth and gums in the dental model. The segmented teeth form an independent tooth model to facilitate the movement of single teeth in subsequent design.

[0036] To continue, after the teeth are segmented, the tooth FDI is identified. Tooth FDI (International Dental Federation) recording method: This type of recording method records the tooth position in two digits, the tens digit is the quadrant where the tooth is located and the deciduous and permanent teeth, and the ones digit is the order of the tooth arrangement. For example, the upper right first permanent molar can be represented as 16, and the lower left second deciduous molar can be represented as 75. Furthermore, feature recognition (length, width, height, volume, etc. of the tooth) is performed on each segmented tooth, and its FDI is identified based on the automatically identified tooth features and the corresponding position of the tooth, or the tooth FDI can be identified through machine learning methods. Specifically, by establishing a three-dimensional tooth model and constructing its standard coordinate system, then obtaining the segmented three-dimensional tooth model to be identified and constructing its coordinate system, based on the coordinate systems of the two, the center of gravity position of each standard tooth in the standard three-dimensional tooth model and the center of gravity position of each tooth to be identified in the three-dimensional tooth model to be identified are determined, and then based on the center of gravity positions of the standard teeth and the center of gravity positions of the teeth to be identified, the FDI of the teeth to be identified is determined through alignment and registration, thereby realizing automatic identification of tooth types, improving accuracy, and improving efficiency.

[0037] To continue the explanation, after the tooth type is identified, the three axes of the tooth are established, and feature identification (such as incisal point, FA point, central groove, etc.) is performed according to each segmented tooth. For example, according to the tooth category, the corresponding standard tooth model is determined, and the standard tooth model is deformed to the test tooth model, and the feature points on the deformed standard tooth model are mapped to the test tooth model to obtain the feature points of the tooth model to be tested. A three-axis coordinate system is established for each tooth to determine the position and direction of the tooth. This will provide key reference information for subsequent tooth arrangement algorithms, or the three-axis information of the teeth can also be identified through machine learning methods. Further, the standard tooth model and the test tooth model are ICP aligned (ICP alignment is based on one model and then each vertex on the other model is selected as the corresponding point with the nearest point on the reference model, and then aligned), and the three-axis information of the standard tooth model is assigned to the test tooth model.

[0038] After the above series of processing, the above initial dental model can be used for tooth arrangement design, and the system will generate a personalized correction plan based on the patient's oral data and medical rules. In some embodiments, an algorithm is used for tooth arrangement, which takes into account the gap between teeth, the occlusion between the upper and lower posterior teeth, the overbite and coverage of the anterior teeth, etc., to determine the final target position of each tooth. For example: according to the above initial dental model, the target dental arch curve is confirmed, and the teeth on the initial dental model are arranged on the target dental arch curve; wherein, the characteristic position of each tooth can be referenced, such as the midpoint of the incisal edge of the tooth, specifically including: the midpoint of the incisal edge of the tooth in the anterior teeth area, and / or the midpoint of the buccal cusp of the tooth in the posterior teeth area, the midpoint of the incisal edge of the incisor, the cusp point of the canine, the buccal cusp point of the premolar, and the middle point of the buccal cusp of the molar. For the specific details of this part of the tooth arrangement process, please refer to the process of the digital tooth arrangement method in the patent (application number: CN202110746416.8). It should be noted that, in addition to the above-mentioned method of first confirming the target dental arch curve and then aligning the teeth based on the target dental arch curve, other target position confirmation methods may also be used in other embodiments, which are not listed here one by one.

[0039] Step 1012: Perform step-by-step movement design based on the initial jaw model and the target jaw model to obtain step-by-step jaw models corresponding to multiple correction steps.

[0040] Specifically, this step can generate a series of intermediate steps for each tooth from the initial position to the final target position based on the patient's initial dentition and target dentition. The generation process needs to consider the movement order of the teeth, the movement amount of each step, the force state of the teeth, the collision state between the teeth, etc. These movement steps determine how the teeth gradually move each tooth during the treatment process to achieve the final correction goal. For the specific step-by-step process, please refer to the step-by-step method of tooth correction in patent 202110497074.0.

[0041] The above steps 1011 and 1012 define a method for obtaining a step-by-step dental model, and determine that after obtaining the target dental model, multiple intermediate step-by-step movements are obtained to ensure that the obtained step-by-step dental model is accurate. It can be understood that in addition to the above-mentioned implementation method of first confirming the target position of the patient's dentition, and then performing the intermediate process step by step to obtain a step-by-step dental model, other implementation methods for obtaining a step-by-step dental model can also be used, such as using a target search method to limit the position of each tooth in the mobile dentition according to the physiological characteristics of the teeth, and detecting whether the moved dentition meets the characteristics of the correction target. When it is determined that it does not meet the requirements, some of the teeth are adjusted until all teeth meet the correction target. In actual applications, other methods can also be used, which are not listed here one by one.

[0042] Step 102: Generate a corresponding first orthodontic appliance model according to each step-by-step dental and maxillofacial model.

[0043] In this embodiment, the step-by-step dental model is a mesh model, and the corresponding execution process of generating the corresponding first appliance model can be as follows: Figure 3 As shown, combined with Figure 4 , Figure 5 Provide a description, including:

[0044] Step 1021, the step-by-step dental model 10 is expanded outward to obtain two single-layer membrane grids.

[0045] Step 1022, the two single-layer membrane grids and the edge lines of the step-by-step dental model 10 are processed to generate two single-layer appliance membrane grids.

[0046] Specifically, the above steps 1021 to 1022 are described as follows: first, the step-by-step dental model 10 is expanded once to obtain a single-layer network. In this process, the marchingCube algorithm can be used to expand the model by 0.75 mm to obtain a single-layer offset mesh. The edge line in the step-by-step dental model 10, which can be a cutting indicator line 11 (in some embodiments, the gum line) in some embodiments, is used to cut the above single-layer mesh. After cutting, a cut single-layer membrane mesh is obtained. It can be understood that in actual processing, due to the accuracy of the points on the cutting line, the edges cut out at the first time may not be smooth enough. At this time, the cut single-layer membrane mesh can be smoothed again.

[0047] Specifically, the above single-layer membrane grid is further retracted 0.2 mm in the negative direction of the normal line to obtain the inner membrane grid, and the edges of the inner and outer single-layer grids are sutured to obtain the final double-layer membrane grid structure. It can be understood that the above retraction distance can be determined according to the thickness of the orthodontic appliance.

[0048] In addition, in addition to the above-mentioned method of expanding first and then retracting to generate two single-layer appliance membrane grids, it is also possible to expand outward twice to obtain two single-layer appliance membrane grids. The specific method can be confirmed according to actual needs and will not be listed here. It can also be understood that the step of cutting the appliance membrane grid obtained according to the cutting indicator line can be performed after one single-layer membrane grid is generated, or after two single-layer membrane grids are generated. The execution order can be confirmed according to actual needs and will not be repeated here.

[0049] Step 1023 , suturing the edges of the two single-layer orthodontic membrane grids to obtain the orthodontic model 20 .

[0050] The above steps 1021 to 1023 define a generation process of the appliance model, making the generation process simple, accurate and fast. It can be understood that in addition to the above membrane grid generation method, other appliance model generation methods can also be used in actual applications, which are not listed here one by one.

[0051] It is worth mentioning that after the appliance model is generated, it can be rendered appropriately to form Figure 6 Model of the appliance shown.

[0052] Step 103: Visually display the patient's correction display model.

[0053] Specifically, the visual display may include providing charts, images, videos or other visual methods, and converting data or information into a visual form through the terminal display screen, so that users can understand and analyze more intuitively. It can display the complex correction process on a visual interface, allowing users to more easily discover and understand the structural details and the target positions of each step, and more clearly and accurately confirm whether there are any unreasonable aspects after wearing it, and also make the interactive confirmation in the design more convenient and clear. More specifically, the above-mentioned correction display model includes each step-by-step dental model and the corresponding first appliance model worn on the step-by-step dental model, such as Figure 7 shown.

[0054] It should also be noted that, when displaying the patient's correction display model, this embodiment can display each step-by-step dental model and the corresponding appliance model in the order of correction time. The above embodiment limits the display to chronological order so that the user can more intuitively and accurately confirm the entire process of the correction plan. In some embodiments, when displaying in the order of correction time, the step-by-step dental model and the corresponding appliance model can be made into a sequential dynamic video and then played, so that the user can more intuitively feel the dynamic effect of tooth movement. In some other embodiments, the timeline can be displayed when displaying the correction display model, and the user can select the corresponding step-by-step correction display model by clicking on the position on the timeline, which is convenient for the user to confirm the key points.

[0055] More specifically, when displaying the correction plan for a patient, this embodiment specifically includes: combining the step-by-step dental and jaw models and the appliance model of the same step, and displaying the combined model during display. Specifically, the combination process can combine the two models in an aligned manner, such as aligning the two models according to the global coordinate system to form the wearing effect of the step-by-step dental and jaw models and the appliance model. The above embodiment is limited to displaying the combined models to facilitate the integrity of the model during display.

[0056] Step 104, after receiving the adjustment instruction, adjust the first appliance model of the corresponding step according to the adjustment instruction to obtain the second appliance model.

[0057] Specifically, when the user views the correction display model on the terminal display screen, he can determine whether to issue an adjustment instruction based on the result of whether to adjust. More specifically, the adjustment objects indicated by the above adjustment instruction may include: the edge line in the correction device model and the position and posture of the accessories in the correction device model, or only one of the above two. The above implementation method limits the content that can be carried in the adjustment instruction, so as to provide a rich modification and confirmation method.

[0058] Continuing to explain, the adjustment object indicated by the above adjustment instruction is the edge line in the appliance model, and the adjustment of the corresponding step-by-step appliance model according to the adjustment instruction specifically includes: Figure 8 As shown, several control points X are provided for user operation, wherein the control points are points at preset positions on the edge line, and the edge line is deformed according to the coordinates of the control points adjusted by the user.

[0059] In other embodiments, a receiving window may be provided for the user to input the moving direction and moving distance, and the edge line may be deformed according to the moving direction and moving distance received from the receiving window. The above embodiments define different adjustment methods for the edge line. Since the adjustment of the edge line is widely used, after defining the relevant adjustment mechanism, automatic adjustment can be achieved when adjustment is needed, so that the overall solution has a higher degree of automation.

[0060] Furthermore, the receiving window provided above is provided with data verification, and the adjusting of the corresponding step-by-step appliance model according to the moving direction and moving distance received from the receiving window includes: when the moving direction and moving distance received in the receiving window meet the data verification, the corresponding step-by-step appliance model is adjusted according to the moving direction and moving distance received from the receiving window. If the data verification is 0-10mm, when the user inputs 3mm, the verification passes, and when the user inputs 20mm, the verification fails. The above implementation method limits a variety of interactive modification methods, which provides users with more freedom while avoiding the inconsistency between the appliance and the actual situation caused by user input errors.

[0061] It should be further explained that the above-mentioned step of deforming the edge line includes different methods, and in some embodiments, the wave curvature at a predetermined position on the edge line is changed. The initial edge line 12 can be as follows Fig. 9 As shown, the initial edge line 12 coincides with the gum line of the teeth on the labial and lingual sides of the teeth, and the wave height (bc) at the gap between the teeth is 1 / 3 of the overall height (ab). One end of line bc is the midpoint b of the line connecting the lowest points of the gum lines of the adjacent teeth on both sides, and the other end is the highest point position c of the gingival papilla. In some embodiments, the curvature of this part of the wave can be changed so that the highest point c moves toward the direction F close to the teeth, so that the deformed edge line bypasses the gingival papilla. The curvature of the wave of the cutting line at this location is increased so that the generated correction shape does not contact the gingival papilla at this location, thereby eliminating the risk of compressing the gums. In some other embodiments, the curvature of this part of the wave can be changed so that the highest point moves away from the teeth, which can increase the wrapping area of ​​the appliance and increase the correction force of the appliance.

[0062] In addition to changing the curvature of the wave shape, the deformation method in other embodiments can also be to deform a predetermined area on the edge line using a weighted iterative algorithm. For example, the user specifies a target point, and the weighted iterative algorithm moves the edge line closest to the target point until the corresponding position of the edge line is close to the target point.

[0063] In some other embodiments, Fig.10 As shown, the edge line is a reference line 13 formed by connecting the lowest points of the gum lines of all adjacent teeth, and the reference line is moved vertically downward along the surface of the gum area in the dental model, and the moved reference line 14 is used as the new edge line. In this embodiment, the edge line is moved away from the gums to enhance the wrapping force of the appliance when it is worn.

[0064] It can be seen that the above embodiments specifically define a variety of different deformation methods to adapt to different application scenarios and enrich the optional deformation methods. In addition, the edge line can be smoothed after deformation, and the edge can be smoothed by smoothing or other methods.

[0065] It should be noted that after the adjustment, the second appliance model is obtained, and the second appliance model can be used to replace the first appliance model in the orthodontic solution, so as to update the correction display model. In some embodiments, an instant update method can be adopted, and after the adjustment, the correction display model in the visual display is updated; in other embodiments, an instant adjustment method can also be adopted, such as dynamically displaying the adjustment process in the visual display section, such as when the user adjusts some elements, the correction display model is adjusted accordingly, so that the adjustment is more visual and interactive, allowing the user to more conveniently confirm whether the adjusted result is the expected result; in some other embodiments, a confirmation update method can also be adopted. After the adjustment, the user clicks the update control to update the display interface. After determining the adjustment object and adjustment method, the user's update instruction is received, and then the appliance model is adjusted, thereby reducing the computer's real-time processing of model data.

[0066] It is worth mentioning that after the user confirms that the correction display model does not need to be modified, he can send a confirmation instruction to facilitate the subsequent production of the correction device.

[0067] It can be seen that in this embodiment, the corresponding orthodontic appliance models are obtained respectively according to the step-by-step dental and maxillary models, and the dental and maxillary models and the orthodontic appliance models worn together are visually displayed when providing a solution, so that relevant professional personnel can view sufficient and intuitive actual wearing effects of the orthodontic appliance, allowing doctors, patients and related persons to make more detailed confirmations, and at the same time providing a modification function to provide users with the possibility of personalized modifications.

[0068] The present application provides another embodiment which also involves a method for visual adjustment of an orthodontic plan. This embodiment is substantially the same as the previous embodiment, with the main difference being that after obtaining the step-by-step dental model, orthodontic accessories need to be added so that the orthodontic plan can be more completely displayed during the display stage, allowing the user to not only understand the wearing status of the appliance itself, but also the position and posture of various accessories used in the correction process.

[0069] In some embodiments, after obtaining the step-by-step dental and maxillary models corresponding to a plurality of correction steps and before generating the first appliance model, it includes: adding a first type of attachment to each step-by-step dental and maxillary model according to the movement mode between two adjacent steps, and correspondingly, when generating the corresponding first appliance model according to each step-by-step dental and maxillary model, generating the corresponding appliance model according to the step-by-step dental and maxillary model after adding the attachment. Since some attachments are installed on the tooth surface, the shape of the appliance is determined according to the dental and maxillary model after the attachment is installed, when adding such attachments, they can be added to the step-by-step dental and maxillary model first, and then the model data can be processed to obtain an appliance with a structure that contains the attachments. Specifically, the first type of attachments can be retention attachments, correction attachments, torsion attachments, etc. Further, after adding the first type of attachments, the tooth model, gum model, and attachments can be combined through a Boolean algorithm to reproduce the appliance model. In some embodiments, the combination process may include: traversing and calculating the intersection of all triangular facets of the model between each other to obtain the intersection lines of the intersecting models, and dividing the model into various areas according to the intersection lines, selecting the outermost segmented areas of all areas to form a combined model, using cutting lines to divide the combination into two parts, taking the crown part, and then expanding outward to obtain the orthodontic appliance model.

[0070] In other embodiments, when generating the corresponding first orthodontic appliance model according to each step-by-step dental and maxillary model, it includes: adding a second type of accessories to the first orthodontic appliance model corresponding to each step-by-step dental and maxillary model according to the movement method between two adjacent steps. Since some accessories are directly installed on the appliance, they cannot be visually displayed to the user in the prior art, and this embodiment can add such accessories directly to the orthodontic appliance model according to the adding rules. Specifically, the second type of accessories can be external traction hooks, external jaw pads, etc., and can also be traction structures formed by cutting off part of the appliance. It can be seen that the second type of accessories can be displayed, which makes it easier for users to confirm the effect of wearing the orthodontic appliance.

[0071] It should be noted that the above examples in this embodiment are all illustrative descriptions for easy understanding and do not constitute a limitation on the technical solutions of the present invention.

[0072] The step division of the above methods is only for the purpose of clear description. When implemented, they can be combined into one step or some steps can be split and decomposed into multiple steps. As long as they include the same logical relationship, they are all within the scope of protection of this patent; adding insignificant modifications to the algorithm or process or introducing insignificant designs without changing the core design of the algorithm and process are all within the scope of protection of this patent.

[0073] Another embodiment of the present application relates to a computer-readable storage medium storing a computer program, which implements the above method embodiment when executed by a processor.

[0074] That is, those skilled in the art can understand that all or part of the steps in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a program, and the program is stored in a storage medium, including a number of instructions to enable a device (which can be a single-chip microcomputer, chip, etc.) or a processor to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, referred to as: ROM), random access memory (Random Access Memory, referred to as: RAM), disk or optical disk and other media that can store program codes.

[0075] Those skilled in the art will appreciate that the above embodiments are specific embodiments for implementing the present application, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present application.

Claims

1. A visual adjustment method for an orthodontic plan, characterized in that: include: Obtaining step-by-step dental models corresponding to multiple correction steps; Generate a corresponding first orthodontic appliance model according to each step-by-step dental and jaw model; Visually displaying the patient's correction display model, wherein the correction display model includes each step-by-step dental and jaw model and a corresponding first orthodontic appliance model worn on the step-by-step dental and jaw model; After receiving the adjustment instruction, the first appliance model of the corresponding step is adjusted according to the adjustment instruction to obtain the second appliance model.

2. The visual adjustment method of orthodontic plan according to claim 1, characterized in that: The step-by-step dental and jaw models corresponding to the multiple correction steps are obtained respectively, including: Acquire the patient's initial dental model, perform tooth arrangement design based on the initial dental model, and obtain the patient's target dental model; A step-by-step movement design is performed according to the initial jaw model and the target jaw model to obtain step-by-step jaw models corresponding to a plurality of correction steps.

3. The visual adjustment method of orthodontic plan according to claim 1, characterized in that: The step-by-step dental model is a mesh model; Generate the first appliance model based on the step-by-step dental model, including: Expanding the step-by-step dental model outwards to obtain two single-layer membrane grids respectively; Processing the two single-layer membrane grids and the edge lines of the step-by-step dental model to generate two single-layer appliance membrane grids; The edges of the two single-layer orthodontic membrane grids are sutured to obtain the orthodontic model.

4. The visual adjustment method of orthodontic plan according to claim 1, characterized in that: The adjustment objects indicated by the adjustment instruction include: the edge line in the orthodontic appliance model and / or the position and posture of the accessories in the orthodontic appliance model.

5. The visual adjustment method of orthodontic plan according to claim 4, characterized in that: The adjustment object indicated by the adjustment instruction is the edge line in the appliance model, and the adjusting of the appliance model corresponding to the steps according to the adjustment instruction includes: Providing a number of control points for user operation, wherein the control points are points at preset positions on the edge line, and deforming the edge line according to the coordinates of the control points adjusted by the user; or, A receiving window is provided for a user to input a moving direction and a moving distance, and the edge line is deformed according to the moving direction and the moving distance received from the receiving window.

6. The visual adjustment method of orthodontic plan according to claim 5, characterized in that: The receiving window is provided with data verification, and the adjusting of the corresponding step-by-step appliance model according to the moving direction and moving distance received from the receiving window includes: When the moving direction and moving distance received in the receiving window meet the data verification, the corresponding step-by-step appliance model is adjusted according to the moving direction and moving distance received from the receiving window.

7. The visual adjustment method of orthodontic plan according to claim 5, characterized in that: The deforming of the edge line includes: changing the curvature of the wave at a predetermined position on the edge line; or deforming a predetermined area on the edge line using a weighted iterative algorithm; or, Obtain a baseline formed by the line connecting the lowest points of the gum lines of all adjacent teeth, move the baseline vertically downward along the surface of the gum area in the dental model, and use the moved baseline as the new edge line.

8. The visual adjustment method of orthodontic plan according to claim 1, characterized in that: The treatment plan presented to the patient includes: The dental models of each step and the corresponding appliance models are displayed in chronological order.

9. The visual adjustment method of orthodontic plan according to claim 1, characterized in that: After obtaining the step-by-step dental and jaw models, adding a first type of attachment to each step-by-step dental and jaw models according to the movement mode between two adjacent steps; generating a corresponding first orthodontic appliance model according to each step-by-step dental and jaw models, including: generating a corresponding orthodontic appliance model according to the step-by-step dental and jaw models after adding the attachments; and / or, The generating of the corresponding first orthodontic appliance model according to each step-by-step dental and maxillary model includes: adding a second type of attachment to the first orthodontic appliance model corresponding to each step-by-step dental and maxillary model according to the movement mode between two adjacent steps.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method for visually adjusting an orthodontic plan according to any one of claims 1 to 9 is implemented.

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