CN114638838A

CN114638838A - Tooth model generation method, device, equipment and storage medium

Info

Publication number: CN114638838A
Application number: CN202210286110.3A
Authority: CN
Inventors: 甄圣贤
Original assignee: Shining 3D Technology Co Ltd
Current assignee: Shining 3D Technology Co Ltd
Priority date: 2022-03-22
Filing date: 2022-03-22
Publication date: 2022-06-17

Abstract

The present disclosure relates to a tooth model generation method, apparatus, device, and storage medium. The method comprises the following steps: acquiring a three-dimensional scanning model in the oral cavity of a target object; segmenting the tooth margin line and the teeth of the target object from the three-dimensional scanning model; constructing a virtual gum based on the tooth edge line and the intraoral dental contour line of the target object, wherein the dental contour line is obtained by projecting and smoothing the tooth edge line to the intraoral dental plane; a tooth model of the target object is generated based on the virtual gingiva and the teeth. According to the embodiment of the disclosure, a complete and reliable virtual gum can be obtained, and a complete and reliable tooth model can be regenerated further according to the virtual gum and the divided teeth, so that a complete, reliable, visual and beautiful tooth model can be obtained.

Description

Tooth model generation method, device, equipment and storage medium

Technical Field

The present disclosure relates to the field of tooth model generation technologies, and in particular, to a tooth model generation method, apparatus, device, and storage medium.

Background

In recent years, digital oral techniques have been rapidly developed, and invisible orthodontics of teeth have been gradually popularized. In order to perform invisible orthodontic treatment on teeth, a tooth model needs to be generated, and data support is provided for designing a tooth correction scheme.

The existing tooth model generation method needs to go through the processes of model taking, model overturning and correction. However, the tooth model generated based on this method may have missing or deformed shapes, resulting in unreliable tooth models. Therefore, it is an urgent technical problem to provide a reliable tooth model generation method.

Disclosure of Invention

In order to solve the above technical problem, the present disclosure provides a tooth model generation method, apparatus, device, and storage medium.

In a first aspect, the present disclosure provides a method of generating a dental model, the method comprising:

acquiring a three-dimensional scanning model in the oral cavity of a target object;

segmenting the tooth margin line and the teeth of the target object from the three-dimensional scanning model;

constructing a virtual gum based on the tooth edge line and the intraoral dental contour line of the target object, wherein the dental contour line is obtained by projecting and smoothing the tooth edge line to the intraoral dental plane;

a tooth model of the target object is generated based on the virtual gingiva and the teeth.

In a second aspect, the present disclosure provides a dental model generation apparatus comprising:

the three-dimensional scanning model acquisition module is used for acquiring a three-dimensional scanning model in the oral cavity of the target object;

the segmentation module is used for segmenting the tooth edge line and the teeth of the target object from the three-dimensional scanning model;

the virtual gum building module is used for building a virtual gum based on a tooth edge line and a tooth jaw contour line in the oral cavity of a target object, wherein the tooth jaw contour line is obtained by projecting and smoothing the tooth edge line to a tooth jaw plane in the oral cavity;

and the tooth model generation module is used for generating a tooth model of the target object according to the virtual gingiva and the teeth.

In a third aspect, embodiments of the present disclosure also provide a tooth model generation apparatus, including:

one or more processors;

a storage device for storing one or more programs,

when the one or more programs are executed by the one or more processors, the one or more processors implement the tooth model generation method provided in the first aspect.

In a fourth aspect, the disclosed embodiments also provide a computer-readable storage medium, on which a computer program is stored, which, when executed by a processor, implements the tooth model generation method provided in the first aspect.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:

according to the tooth model generation method, the device, the equipment and the storage medium of the embodiment of the disclosure, after the three-dimensional scanning model in the oral cavity of the target object is obtained, the tooth edge line and the teeth of the target object are segmented from the three-dimensional scanning model, the virtual gingiva is constructed based on the tooth edge line and the tooth jaw contour line in the oral cavity of the target object, wherein the tooth jaw contour line is obtained by projecting and smoothing the tooth edge line to the tooth jaw plane in the oral cavity, and finally, the tooth model of the target object is generated according to the virtual gingiva and the teeth. By the method, the initial three-dimensional scanning model can be segmented and the virtual gum can be reconstructed, so that a complete and reliable virtual gum can be obtained, and a complete and reliable tooth model can be regenerated further according to the virtual gum and the segmented teeth, so that a complete, reliable, visual and attractive tooth model can be obtained.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 is a schematic flow chart illustrating a method for generating a tooth model according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a three-dimensional scanning model provided in an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of another three-dimensional scanning model provided in the embodiment of the present disclosure;

FIG. 4 is a schematic view of a tooth construction provided in accordance with an embodiment of the present disclosure;

FIG. 5 is a perspective view of an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a gingival mesh model according to an embodiment of the present disclosure;

FIG. 7 is a schematic flow chart diagram illustrating another method for generating a tooth model according to an embodiment of the present disclosure;

FIG. 8 is a schematic diagram of a dental model generation apparatus according to an embodiment of the present disclosure;

fig. 9 is a schematic structural diagram of a tooth model generation apparatus provided in an embodiment of the present disclosure.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced in other ways than those described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.

Because the tooth model generated through the processes of model taking, model overturning and correction has defects or deformation, the generated tooth model is incomplete and unreliable, and therefore, the tooth model needs to be re-established to obtain a complete and reliable tooth model.

In order to meet the above-mentioned needs, embodiments of the present disclosure provide a tooth model generation method, apparatus, device, and storage medium capable of obtaining a complete and reliable tooth model.

A tooth model generation method provided by the embodiment of the present disclosure is described below with reference to fig. 1 to 7. In an embodiment of the present disclosure, the tooth model generation method may be performed by an electronic device. The electronic device may include a tablet computer, a desktop computer, a notebook computer, and other devices having a communication function, and may also include a virtual machine or a simulator-simulated device.

Fig. 1 shows a flowchart of a tooth model generation method provided by an embodiment of the present disclosure.

As shown in fig. 1, the tooth model generation method may include the following steps.

S110, a three-dimensional scanning model of the oral cavity of the target object is obtained.

In the disclosed embodiments, in order to construct a complete and reliable tooth model, the electronic device needs to acquire an initial model of the oral cavity of the target object as a three-dimensional scan model.

In the disclosed embodiment, the target object may be a user who needs orthodontic treatment or tooth restoration.

In the disclosed embodiment, the three-dimensional scan model may be an initial tooth model obtained by scanning.

In some embodiments, the three-dimensional scan model may be obtained by three-dimensional reconstruction of three-dimensional scan data obtained by scanning with an intraoral scanner.

In other embodiments, the three-dimensional scan model may be obtained by scanning the dental plaster model with a desktop scanner. The tooth plaster model can be obtained by carrying out the processes of model taking, model overturning and correction on the teeth of the target object.

And S120, segmenting the tooth edge line and the tooth of the target object from the three-dimensional scanning model.

In the embodiment of the present disclosure, the obtained three-dimensional scan model has the teeth and gums of the target object, and in order to obtain a complete and reliable tooth model, the electronic device needs to perform image segmentation on the three-dimensional scan model, so that the tooth edge lines and the teeth of the target object are segmented from the three-dimensional scan model, and then the tooth model is regenerated according to the tooth edge lines and the teeth.

In the disclosed embodiment, the tooth edge line may be a curved line formed for an edge point connection between the tooth and the gum.

In embodiments of the present disclosure, the segmented teeth may include various types of digitized teeth of the target object. For example, the divided teeth include a missing tooth, an inclined tooth, and the like.

Specifically, the electronic device may perform image recognition on the gingiva and the teeth on the three-dimensional scanning model to recognize the gingiva, the teeth, and the tooth edge lines, and perform image segmentation on the three-dimensional scanning model to obtain the tooth edge lines and the teeth of the target object.

S130, constructing a virtual gum based on the tooth edge line and the intraoral dental contour line of the target object, wherein the dental contour line is obtained by projecting the tooth edge line to the intraoral dental plane and smoothing the projection.

In the embodiment of the present disclosure, after the tooth edge line and the tooth are segmented, the electronic device may construct the virtual gum according to a plane corresponding to the tooth edge line and a reference plane inside the oral cavity.

In an embodiment of the present disclosure, the dental contour line can be a contour of a reference plane inside the oral cavity for constructing a virtual gum.

In the disclosed embodiment, the virtual gum may be a three-dimensional stereo structure for simulating a gum of a target object.

Specifically, the electronic device can respectively obtain planes corresponding to the tooth edge line and the tooth jaw contour line, and perform meshing processing on a space region between the two planes, so that the virtual gum inside the oral cavity is constructed.

And S140, generating a tooth model of the target object according to the virtual gingiva and the teeth.

In the embodiment of the present disclosure, the electronic device may place the teeth on the corresponding sockets of the virtual gum according to the positions of the teeth and the position of each socket on the virtual gum, so as to obtain the tooth model of the target object.

In an embodiment of the present disclosure, the tooth model is a complete tooth model consisting of the virtual gums and the digitized teeth of the target object.

In the embodiment of the present disclosure, after the three-dimensional scan model of the target object in the oral cavity is obtained, the tooth edge line and the teeth of the target object are segmented from the three-dimensional scan model, and the virtual gum is constructed based on the tooth edge line and the dental contour line of the target object in the oral cavity, wherein the dental contour line is obtained by projecting and smoothing the tooth edge line to the dental plane in the oral cavity, and finally, the tooth model of the target object is generated according to the virtual gum and the teeth. By the method, the initial three-dimensional scanning model can be segmented and the virtual gum can be reconstructed, so that a complete and reliable virtual gum can be obtained, and a complete and reliable tooth model can be regenerated further according to the virtual gum and the segmented teeth, so that a complete, reliable, visual and attractive tooth model can be obtained.

In another embodiment of the present disclosure, the teeth and the tooth edge lines can be segmented from the three-dimensional scanning model in different ways; in addition, a gingival grid model can be constructed in a gridding mode; meanwhile, a tooth model can be generated according to the arrangement relation among the teeth, the positions of the teeth and the positions of the sockets of the virtual gingiva.

In some embodiments of the present disclosure, the teeth and tooth edge lines may be segmented from the three-dimensional scan model in different ways.

In some embodiments, S120 may specifically include the following steps:

and S1201, inputting the three-dimensional scanning model into a pre-trained tooth edge line recognition model to obtain the tooth edge line of the target object.

Specifically, before segmenting the three-dimensional scanning model, the electronic device may train the tooth edge line recognition model with a plurality of samples; after the three-dimensional scanning model is acquired, the three-dimensional scanning model can be directly input into the tooth margin line identification model, so that the tooth margin line is segmented from the three-dimensional scanning model by using the tooth margin line identification model.

In order to understand the tooth edge line segmentation principle, the training process of the tooth edge line recognition model can be described in detail, and the training process comprises the following steps:

step 1, obtaining a first sample model and tooth edge lines corresponding to the first sample model, wherein a tooth area, a gum area and the tooth edge lines are marked in advance on part of the sample model in the first sample model, and the sample model comprises teeth in various shapes;

and 2, performing iterative training on the first initial segmentation model by using the first sample model and the tooth margin lines corresponding to the first sample model until a trained tooth margin line recognition model is obtained.

In addition, through the above training process, the tooth edge lines can be segmented by using the pre-trained tooth edge line recognition model, and the tooth region and the gum region can be determined.

Therefore, in the embodiment of the disclosure, the three-dimensional scanning model can be directly input into the tooth edge line identification model, so that the tooth edge line of the target object is obtained by segmenting the three-dimensional scanning model by using the tooth edge line identification model.

In other embodiments, the method for dividing the boundary line of the tooth in S120 may specifically include the following steps:

s1202, obtaining an image value corresponding to each pixel point on the three-dimensional scanning model;

s1203, segmenting the three-dimensional scanning model based on the difference of image values corresponding to adjacent pixel points on the three-dimensional scanning model and a preset threshold value to obtain tooth edge lines.

The image value may include at least one of a color value, a gray scale value, a contrast, a pixel value, and the like.

S1203 may specifically include the following steps:

s1, if only one image value is obtained by identification, directly subtracting image values corresponding to adjacent pixel points, judging whether the difference of the obtained image values is larger than a preset threshold value, if so, determining the adjacent pixel points as edge pixel points, taking any one of the adjacent pixel points as tooth edge points until the difference of the image values corresponding to all the adjacent pixel points is obtained, obtaining all tooth edge points according to the difference of the image values corresponding to all the adjacent pixel points and the preset threshold value, and finally connecting all the tooth edge points to obtain tooth edge lines;

s2, if at least two image values are obtained through identification, image values corresponding to adjacent pixel points can be directly subtracted, weighted summation is conducted on the difference of the obtained image values, whether the obtained weighted summation result is larger than a preset threshold value or not is judged, if the obtained weighted summation result is larger than the preset threshold value, the adjacent pixel points are determined to be edge pixel points, any one of the adjacent pixel points is taken as a tooth edge point until the weighted summation result of the difference of the image values corresponding to all the adjacent pixel points is obtained, all tooth edge points are obtained according to the weighted summation result of the difference of the image values corresponding to all the adjacent pixel points and the preset threshold value, and finally all the tooth edge points are connected to obtain tooth edge lines.

In order to facilitate intuitive understanding of the segmentation effect of the tooth edge line, fig. 2 shows a schematic structural diagram of a three-dimensional scanning model provided by the embodiment of the disclosure, and fig. 3 shows a schematic structural diagram of another three-dimensional scanning model provided by the embodiment of the disclosure.

As shown in fig. 2, the three-dimensional scan model includes real teeth and real gums. As shown in fig. 3, the black line in the three-dimensional scan model is a tooth edge line obtained by segmentation.

Therefore, in the embodiment of the disclosure, the image analysis can be directly performed on the three-dimensional scanning model to obtain the tooth margin line of the target object.

In some embodiments, the tooth segmentation method in S120 may specifically include the following steps:

and S1205, inputting the three-dimensional scanning model into a pre-trained tooth segmentation model to obtain the teeth of the target object.

Specifically, before the electronic device segments the three-dimensional scan model, the electronic device may train the tooth segmentation model with a plurality of samples; after acquiring the three-dimensional scanning model, the electronic device may directly input the three-dimensional scanning model to the tooth segmentation model, so that the tooth is segmented from the three-dimensional scanning model by using the tooth segmentation model.

In order to understand the tooth segmentation principle, the training process of the tooth segmentation model can be described in detail, and comprises the following steps:

step 1, obtaining a second sample model and teeth corresponding to the second sample model, wherein the second sample model is pre-marked with teeth in various shapes and teeth in various positions;

and 2, performing iterative training on the second initial segmentation model by using the second sample model and teeth corresponding to the second sample model until a trained tooth segmentation model is obtained.

Thus, in the disclosed embodiment, the three-dimensional scan model may be directly input into the tooth segmentation model, so that the three-dimensional scan model is segmented by the tooth segmentation model, and the teeth of the target object are segmented.

In other embodiments, the tooth segmentation method in S120 may specifically include the following steps:

s1206, acquiring the lowest edge point on the tooth edge line and the pixel range of the tooth;

s1207, aiming at each lowest edge point, obtaining a corresponding target pixel range to obtain the tooth of the target object.

Specifically, the electronic device may identify a lowest edge line on the tooth edge line and a pixel range of the tooth region according to the pixel point position of the tooth edge line; for each lowest edge line, a target pixel range corresponding to each lowest edge line is extracted from the pixel range of the tooth region, and thus, each tooth of the target object is configured by all pixels in each target pixel range, resulting in the tooth of the target object shown in fig. 4.

Therefore, in the embodiment of the disclosure, the image analysis can be directly performed on the three-dimensional scanning model to obtain the teeth of the target object.

In some embodiments of the present disclosure, the gingival mesh model may be constructed in a gridding manner.

In the embodiment of the present disclosure, optionally, S130 may specifically include the following steps:

s1301, aiming at a three-dimensional space region defined by planes respectively corresponding to tooth edge lines and tooth jaw contour lines, carrying out meshing treatment on the three-dimensional space region to construct a gingival mesh model;

and S1302, taking the gum grid model as a virtual gum.

Specifically, after the electronic device obtains the tooth edge line, firstly, a plane corresponding to the tooth edge line can be determined, and the tooth edge line is projected towards the dental jaw direction to obtain a dental jaw contour line and determine a plane corresponding to the dental jaw contour line; then, aiming at a three-dimensional space region defined by planes respectively corresponding to the tooth edge line and the tooth jaw contour line, carrying out meshing treatment on the three-dimensional space region defined by the planes respectively corresponding to the tooth edge line and the tooth jaw contour line according to the preset mesh size to obtain a gum mesh model, and directly taking the gum mesh model as a virtual gum.

To facilitate understanding of the contour lines of the jaws and the edge lines of the teeth, fig. 5 shows a schematic view of the planes of the jaws within an oral cavity, provided by an embodiment of the disclosure.

As shown in fig. 5, the dental plane includes a tooth edge line 510 and a dental contour line 520, wherein the tooth edge line 510 is obtained by projecting the tooth edge shown in fig. 3 onto the dental plane, and the dental contour line 520 is obtained by projecting the tooth edge line onto the dental plane in the oral cavity and smoothing the projection.

It should be noted that, since the three-dimensional scan model may segment a plurality of tooth edge lines, in order to improve the reliability of the gingival mesh model, new tooth edge lines may be drawn according to the plurality of tooth edge lines before the gingival mesh model is constructed, so that the gingival mesh model is constructed by using the planes corresponding to the new edge lines and the tooth jaw contour lines.

For the foregoing reasons, in the embodiment of the present disclosure, optionally before S1301, the method may include the following steps:

under the condition that at least two tooth edge lines are segmented, drawing new tooth edge lines based on edge points with the distance smaller than a preset distance on the at least two tooth edge lines;

correspondingly, S1301 may specifically include the following steps:

and determining a three-dimensional space region surrounded by planes respectively corresponding to the new tooth edge line and the new tooth jaw contour line, and carrying out meshing treatment on the three-dimensional space region to construct a gingival mesh model.

Specifically, if at least two tooth edge lines are segmented from the three-dimensional scanning model, the distance between the at least two tooth edge lines is calculated, the distance is compared with a preset distance, if the distance is smaller than the preset distance, a new tooth edge line is drawn based on edge points on the at least two tooth edge lines, then a three-dimensional space area defined by planes respectively corresponding to the new tooth edge line and the tooth jaw contour line is determined, the three-dimensional space area is subjected to meshing according to the preset mesh size, a gum mesh model is obtained, and the gum mesh model is used as a virtual gum.

The preset distance can be used for judging whether to draw a new tooth edge line by using edge points on at least two tooth edge lines.

Fig. 6 shows a schematic structural diagram of a gingival mesh model provided by an embodiment of the present disclosure.

As shown in fig. 6, the gingival mesh model may be a three-dimensional mesh model composed of meshes of a plurality of sizes. The gingival mesh model includes a gingival side 610 and a socket 620.

Therefore, in the embodiment of the disclosure, the gingival mesh model is accurately constructed according to the tooth edge line and the tooth jaw contour line and by adopting a gridding mode.

In some embodiments of the present disclosure, a tooth model may be generated according to the arrangement relationship between the teeth, the positions of the teeth, and the socket position of the virtual gum.

In this disclosure, optionally, S140 may specifically include the following steps:

and S1401, correspondingly placing teeth on the socket surface of the virtual gum according to the arrangement relation among the teeth, and generating a tooth model of the target object.

Specifically, the electronic device can determine the arrangement relationship among the teeth while segmenting the teeth, and after the gum mesh model is constructed, the teeth can be correspondingly placed on the socket surface of the virtual gum according to the arrangement relationship among the teeth, the positions of the teeth and the positions of the socket surfaces on the gum mesh model, so that the tooth model of the target object is generated according to the real teeth and the gum mesh model.

The arrangement relationship may be a positional relationship between the respective teeth.

Thus, in the disclosed embodiments, real teeth may be placed on virtual gums, such that a complete and reliable tooth model results.

In yet another embodiment of the present disclosure, after the tooth model is generated, the virtual gum and the entire tooth model can be moved accordingly as the teeth are moved, so that the moving process is visually shown to the user.

Fig. 7 shows a flowchart of another tooth model generation method provided by the embodiment of the disclosure.

As shown in fig. 7, the tooth model generation method may include the following steps.

And S710, acquiring a three-dimensional scanning model of the oral cavity of the target object.

And S720, segmenting the tooth edge line and the teeth of the target object from the three-dimensional scanning model.

And S730, constructing a virtual gum based on the tooth edge line and the intraoral dental contour line of the target object, wherein the dental contour line is obtained by projecting and smoothing the tooth edge line to the intraoral dental plane.

And S740, generating a tooth model of the target object according to the virtual gingiva and the teeth.

S710 to S740 are similar to S110 to S140, and are not described herein again.

And S750, moving the target tooth in response to the received moving operation of the target tooth on the tooth model.

In the embodiment of the present disclosure, after obtaining the tooth model, if the movement operation of the target tooth on the tooth model is detected, the electronic device may move the target tooth to the target position in response to the movement operation.

In the disclosed embodiments, the movement operation may be a user-triggered operation for moving a tooth position.

And S760, adjusting the tooth edge line and the virtual gum according to the position of the moved target tooth.

In the embodiment of the present disclosure, after the position of the target tooth is moved, the position of the edge of the target tooth is changed, or the positions of the target tooth and other teeth except the target tooth are changed, and therefore, it is necessary to adjust the tooth edge line and adjust the virtual gum determined by the tooth edge line according to the position of the moved target tooth.

In this embodiment of the present disclosure, optionally, S760 may specifically include the following steps:

s7601, determining a new edge point corresponding to each tooth on the tooth model according to the position of the moved target tooth;

s7602, constructing a new tooth edge line and a new virtual gum of the target object based on the new edge point;

s7603, adjusting the tooth edge line to a new tooth edge line, and adjusting the virtual gum to a new virtual gum.

Specifically, in the process of moving the target tooth, the electronic device can record the position of the target tooth in real time, so that a new edge point corresponding to each tooth on the tooth model is determined according to the position of the moved target tooth; then, connecting the new edge points once to obtain new tooth edge lines, and constructing new virtual gingiva according to the new tooth edge lines and the planes corresponding to the tooth jaw contour lines; then, the initially constructed tooth edge line is adjusted to a new tooth edge line, and the initially constructed virtual gum is adjusted to a new virtual gum.

It should be noted that the new tooth edge line and the new virtual gum can be constructed as described in the above embodiments, and are not limited herein.

Therefore, in the disclosed embodiment, after the tooth model is generated, the virtual gingiva and the whole tooth model can be moved while the teeth are moved, so that the teeth and the virtual gingiva can be moved synchronously, the moving process of the tooth model can be visually shown to a user, the user is assisted to set the tooth correction scheme according to the moving degree of the tooth model, and the visual effect of the tooth model is improved.

The embodiment of the present disclosure also provides a tooth model generation device for implementing the tooth model generation method, which is described below with reference to fig. 8. In an embodiment of the present disclosure, the dental model generation apparatus may be an electronic device. The electronic device may include a tablet computer, a desktop computer, a notebook computer, and other devices having a communication function, and may also include a virtual machine or a simulator-simulated device.

Fig. 8 is a schematic structural diagram of a tooth model generation apparatus provided in an embodiment of the present disclosure.

As shown in fig. 8, the tooth model generation apparatus 800 may include: a three-dimensional scanning model acquisition module 810, a segmentation module 820, a virtual gum construction module 830, and a tooth model generation module 840.

A three-dimensional scan model obtaining module 810, which may be configured to obtain a three-dimensional scan model of an oral cavity of a target object;

a segmentation module 820, which can be used to segment the tooth margin line and the tooth of the target object from the three-dimensional scan model;

the virtual gum constructing module 830 may be configured to construct a virtual gum based on the tooth edge line and a dental contour line in the oral cavity of the target object, where the dental contour line is obtained by projecting and smoothing the tooth edge line to a dental plane in the oral cavity;

the tooth model generation module 840 may be configured to generate a tooth model of the target object based on the virtual gingiva and the teeth.

In some embodiments of the present disclosure, the segmentation module 820 may be specifically configured to input the three-dimensional scanning model into a pre-trained tooth edge line recognition model to obtain a tooth edge line of the target object.

In some embodiments of the present disclosure, the segmentation module 820 may be specifically configured to input the three-dimensional scan model into a pre-trained tooth segmentation model to obtain the teeth of the target object.

In some embodiments of the present disclosure, the virtual gum constructing module 830 includes:

the gingival grid model building unit can be used for carrying out meshing treatment on a three-dimensional space region defined by planes respectively corresponding to tooth edge lines and tooth jaw contour lines to build a gingival grid model;

and the virtual gum constructing unit can be used for taking the gum mesh model as the virtual gum.

In some embodiments of the present disclosure, the apparatus may further include:

the new tooth margin line drawing module can be used for drawing a new tooth margin line based on a margin point with a distance smaller than a preset distance on at least two tooth margin lines under the condition that at least two tooth margin lines are segmented;

the gingival mesh model construction unit may be specifically configured to determine a three-dimensional space region surrounded by planes corresponding to the new tooth edge line and the new tooth jaw contour line, perform meshing processing on the three-dimensional space region, and construct a gingival mesh model.

In some embodiments of the present disclosure, the tooth model generation module 840 may be specifically configured to generate a tooth model of the target object by correspondingly placing teeth on the socket surface of the virtual gum according to the arrangement relationship between the teeth.

In some embodiments of the present disclosure, the apparatus further comprises:

a target tooth movement module operable to move a target tooth in response to receiving a movement operation of the target tooth on the tooth model;

and the adjusting module can be used for adjusting the tooth edge line and the virtual gum according to the position of the moved target tooth.

In some embodiments of the present disclosure, the adjusting module may include:

the new edge point determining unit can be used for determining a new edge point corresponding to each tooth on the tooth model according to the position of the moved target tooth;

a reconstruction unit operable to construct a new tooth edge line and a new virtual gum of the target object based on the new edge point;

and an adjusting unit for adjusting the tooth edge line to a new tooth edge line and the virtual gum to a new virtual gum.

It should be noted that the tooth model generation apparatus 800 shown in fig. 8 can perform each step in the method embodiments shown in fig. 1 to 7, and implement each process and effect in the method embodiments shown in fig. 1 to 7, which are not described herein again.

Fig. 9 shows a schematic structural diagram of a tooth model generation device provided by an embodiment of the present disclosure.

As shown in fig. 9, the dental model generation device may comprise a processor 901 and a memory 902 storing computer program instructions.

Specifically, the processor 901 may include a Central Processing Unit (CPU), or an Application Specific Integrated Circuit (ASIC), or may be configured to implement one or more Integrated circuits of the embodiments of the present Application.

Memory 902 may include a mass storage for information or instructions. By way of example, and not limitation, memory 902 may include a Hard Disk Drive (HDD), floppy Disk Drive, flash memory, optical Disk, magneto-optical Disk, tape, or Universal Serial Bus (USB) Drive or a combination of two or more of these. Memory 902 may include removable or non-removable (or fixed) media, where appropriate. The memory 902 may be internal or external to the integrated gateway device, where appropriate. In a particular embodiment, the memory 902 is non-volatile solid-state memory. In a particular embodiment, the Memory 902 includes a Read-Only Memory (ROM). The ROM may be mask-programmed ROM, Programmable ROM (PROM), Erasable PROM (Electrically Erasable PROM, EPROM), Electrically Erasable PROM (Electrically Erasable PROM, EEPROM), Electrically Alterable ROM (Electrically Alterable ROM, EAROM), or flash memory, or a combination of two or more of these, where appropriate.

The processor 901 performs the steps of the tooth model generation method provided by the embodiments of the present disclosure by reading and executing the computer program instructions stored in the memory 902.

In one example, the dental model generation device can also include a transceiver 903 and a bus 904. As shown in fig. 9, the processor 901, the memory 902 and the transceiver 903 are connected via a bus 904 to complete communication with each other.

The bus 904 includes hardware, software, or both. By way of example, and not limitation, a BUS may include an Accelerated Graphics Port (AGP) or other Graphics BUS, an Enhanced Industry Standard Architecture (EISA) BUS, a Front-Side BUS (FSB), a HyperTransport (HT) interconnect, an Industry Standard Architecture (ISA) BUS, an InfiniBand interconnect, a Low Pin Count (LPC) BUS, a memory Bus, a Micro Channel Architecture (MCA) Bus, a Peripheral Component Interconnect (PCI) Bus, a PCI-Express (PCI-X) Bus, a Serial Advanced Technology Attachment (SATA) Bus, a Video Electronics Standards Association Local Bus (VLB) Bus, or other suitable Bus, or a combination of two or more of these. Bus 904 may include one or more buses, where appropriate. Although specific buses are described and shown in the embodiments of the application, any suitable buses or interconnects are contemplated by the application.

The following are embodiments of a computer-readable storage medium provided by the embodiments of the present disclosure, which belong to the same inventive concept as the tooth model generation methods of the above embodiments, and reference may be made to the embodiments of the tooth model generation method described above for details that are not described in detail in the embodiments of the computer-readable storage medium.

The present embodiments provide a storage medium containing computer-executable instructions which, when executed by a computer processor, are operable to perform a method of generating a dental model, the method comprising:

constructing a virtual gum based on a tooth edge line and a tooth jaw contour line in the oral cavity of a target object, wherein the tooth jaw contour line is obtained by projecting and smoothing the tooth edge line to a tooth jaw plane in the oral cavity;

Of course, the storage medium provided by the embodiments of the present disclosure contains computer-executable instructions, and the computer-executable instructions are not limited to the above method operations, and may also perform related operations in the tooth model generation method provided by any embodiments of the present disclosure.

From the above description of the embodiments, it is obvious for a person skilled in the art that the present disclosure can be implemented by software and necessary general hardware, and certainly can be implemented by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present disclosure may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as a floppy disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a FLASH Memory (FLASH), a hard disk or an optical disk of a computer, and includes several instructions for enabling a computer cloud platform (which may be a personal computer, a server, or a network cloud platform) to execute the tooth model generation method provided in the embodiments of the present disclosure.

It is to be noted that the foregoing is only illustrative of the presently preferred embodiments of the present disclosure and that the present principles apply. Those skilled in the art will appreciate that the present disclosure is not limited to the specific embodiments illustrated herein and that various obvious changes, adaptations, and substitutions are possible, without departing from the scope of the present disclosure. Therefore, although the present disclosure has been described in greater detail with reference to the above embodiments, the present disclosure is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present disclosure, the scope of which is determined by the scope of the appended claims.

Claims

1. A method of generating a dental model, comprising:

constructing a virtual gum based on the tooth edge line and a tooth jaw contour line in the oral cavity of the target object, wherein the tooth jaw contour line is obtained by projecting and smoothing the tooth edge line to a tooth jaw plane in the oral cavity;

and generating a tooth model of the target object according to the virtual gingiva and the teeth.

2. The method of claim 1, wherein the segmenting the target object's tooth margin lines from the three-dimensional scan model comprises:

and inputting the three-dimensional scanning model into a pre-trained tooth edge line recognition model to obtain the tooth edge line of the target object.

3. The method of claim 1, wherein segmenting the target object's teeth from the three-dimensional scan model comprises:

and inputting the three-dimensional scanning model into a pre-trained tooth segmentation model to obtain the teeth of the target object.

4. The method of claim 1, wherein constructing a virtual gum based on the tooth edge lines and a dental contour line within an oral cavity of the target object comprises:

aiming at a three-dimensional space region enclosed by planes respectively corresponding to the tooth edge line and the tooth jaw contour line, carrying out meshing treatment on the three-dimensional space region to construct a gingival mesh model;

and taking the gum grid model as the virtual gum.

5. The method according to claim 4, wherein before the meshing the three-dimensional space region defined by the planes corresponding to the tooth edge line and the jaw contour line to construct the gingival mesh model, the method further comprises:

aiming at a three-dimensional space region defined by planes respectively corresponding to the tooth edge line and the tooth jaw contour line, carrying out gridding treatment on the three-dimensional space region to construct a gingival grid model, wherein the method comprises the following steps:

and determining a three-dimensional space region surrounded by planes respectively corresponding to the new tooth edge line and the tooth jaw contour line, and carrying out meshing treatment on the three-dimensional space region to construct a gingival mesh model.

6. The method of claim 1, wherein generating a tooth model of the target object based on the virtual gums and the teeth comprises:

and correspondingly placing the teeth on the socket surface of the virtual gum according to the arrangement relation among the teeth to generate the tooth model of the target object.

7. The method of claim 1, wherein after said generating a tooth model of said target object based on said virtual gingiva and said teeth, said method further comprises:

moving a target tooth on the tooth model in response to receiving a movement operation of the target tooth;

and adjusting the tooth edge line and the virtual gum according to the position of the moved target tooth.

8. The method of claim 7, wherein the adjusting the tooth edge line and the virtual gum according to the moved position of the target tooth comprises:

determining a new edge point corresponding to each tooth on the tooth model according to the position of the moved target tooth;

constructing a new tooth edge line and a new virtual gum of the target object based on the new edge point;

adjusting the tooth edge line to the new tooth edge line, and adjusting the virtual gum to the new virtual gum.

9. A dental model generation apparatus, comprising:

a segmentation module for segmenting the tooth margin line and the teeth of the target object from the three-dimensional scanning model;

the virtual gum constructing module is used for constructing a virtual gum based on the tooth edge line and a tooth jaw contour line in the oral cavity of the target object, wherein the tooth jaw contour line is obtained by projecting and smoothing the tooth edge line to a tooth jaw plane in the oral cavity;

10. A dental model generation apparatus, comprising:

a processor;

a memory for storing executable instructions;

wherein the processor is configured to read the executable instructions from the memory and execute the executable instructions to implement the tooth model generation method of any one of claims 1-8.