KR102016018B1 - Method for setting Gingival line to design prosthesis - Google Patents

Abstract

A margin line setting method according to an embodiment includes a method of setting a margin line among parameters for designing a virtual prosthesis, displaying a three-dimensional oral model including a treatment area; Determining a mode for setting a margin line in the treatment area; Setting a first margin line in the determined mode; Providing a modification interface to modify the first margin line according to a user input; And correcting the first margin line along the correction interface to generate a final margin line.

Description

Margin line setting method for designing virtual prosthesis {Method for setting Gingival line to design prosthesis}

The present invention relates to a margin line setting method and a virtual prosthesis design method including the same. More specifically, the present invention provides an interface for setting margin lines in various modes to set a margin line suitable for a patient's oral cavity, and designs a virtual prosthesis based on the margin line.

Impression acquisition in dental prosthetic manufacturing process is based on the impression material's condition of teeth and tissues, and is an important clinical process that is the basis for the diagnosis of patients, the establishment of future treatment plans, and the production of accurate prostheses.

The general impression acquisition method requires the skilled clinical skills of the operator to select the appropriate impression material according to the procedure and to accurately capture the impression. Impression acquisition process may be inevitably repeated due to various factors such as impression body deformation due to the wrong selection or use of impression material, vomiting reaction of patient, opening disorder, etc. In addition, even in the step of manufacturing the plaster model after the impression acquisition, errors in the production of the dental prosthesis may be caused by the limitation and wear of the fine parts reproduced by the material.

Therefore, research is being conducted to automate the use and the design and production of computers for the design or processing of dental prostheses by hand.

In detail, a prosthesis production system for digitally scanning the oral cavity using an oral scanner, modeling and displaying the scanned oral data in 3D, and then computerly designing the dental prosthesis based on the 3D oral model and producing the designed prosthesis. Development is actively being done.

In particular, attention has been focused on the prosthesis design technology that displays the oral image modeled in the prosthesis production system to be easily recognized by the user, and easily designs a precise and esthetic prosthesis using the displayed oral image.

The prosthetic design system provides a graphical user interface (GUI) for designing a virtual prosthesis, most of which allows the design of the virtual prosthesis via a drawing interface that depends on the operator's ability, thereby providing a high quality of the virtual prosthesis. Is dependent on the ability of the worker and there is a problem that excessive work time is required.

In particular, the margin line setting, which is one of the main points in the design of virtual prostheses, is important. Most of the workers manually set the margin line, it takes a lot of time and there is a problem that the quality of the prosthesis is uneven according to the ability of the worker.

JP 4295076 B2 US 2014-0278279 A1

An object of the present invention is to provide a margin line setting method for accurately setting a margin line of a three-dimensional oral model and designing a virtual prosthesis based on the set margin line, and a virtual prosthesis design method including the same. It is done.

A margin line setting method according to an embodiment includes a method of setting a margin line among parameters for designing a virtual prosthesis, displaying a three-dimensional oral model including a treatment area; Determining a mode for setting a margin line in the treatment area; Setting a first margin line in the determined mode; Providing a modification interface to modify the first margin line according to a user input; And correcting the first margin line along the correction interface to generate a final margin line.

The margin line setting method according to the embodiment selectively provides various modes in which margin lines can be set actively or passively according to the user's intervention, and each mode can provide functions for easily and quickly setting margin lines.

In detail, the automatic mode of the margin line setting method according to the embodiment has the advantage of automatically generating the entire margin line by automatically analyzing the 3D oral model according to the user's one point input.

In addition, the semi-automatic mode of the margin line setting method according to the embodiment, by extracting the edge based on the moving direction of the pointer even if you do not draw the margin line accurately along the user's edge, by generating a margin line based on the extracted edge, This has the advantage of generating margin lines quickly and accurately.

In addition, the manual mode of the margin line setting method according to the embodiment, by generating a margin line based on the user's pointing input and the edge extracted by analyzing the three-dimensional oral model around the, it is possible to generate a margin line quickly and accurately There is an advantage.

In addition, the margin line setting method according to the embodiment provides an easy and quick correction interface that allows the user to modify the margin line to suit the oral cavity even after the user first drew the margin line easily in a desired mode. Can improve.

1 is a block diagram of a physical configuration of a virtual prosthesis design system according to an embodiment of the present invention.
2 is a block diagram of a functional configuration of a computing device according to an embodiment of the present invention.
3 is a flowchart illustrating a design process of a virtual prosthesis according to an embodiment of the present invention.
4 is an example of a screen displaying a three-dimensional oral model according to an embodiment of the present invention.
5 shows a side arch line obtained by analyzing a three-dimensional oral model according to an embodiment of the present invention.
6 is an example of a screen for setting a virtual prosthesis position and type according to an embodiment of the present invention.
7 is an example of a margin line setting screen of a repair area according to an embodiment of the present invention.
8 is a flowchart illustrating a margin line setting process according to an embodiment of the present invention.
9A and 9B are screens illustrating a correction line setting process according to an embodiment of the present invention, and FIGS. 9C and 9D illustrate screens for correcting a margin line through a set correction line according to an embodiment of the present invention.
10 is an example of an insertion axis direction setting screen of a virtual prosthesis according to an embodiment of the present invention.
11 is an example of a prosthesis internal parameter setting screen according to an embodiment of the present invention.
12 is an example of a screen for setting a scale of a virtual prosthesis designed according to an embodiment of the present invention.
FIG. 13 is an example of a screen displaying a virtual prosthesis designed according to the scale set in FIG. 12 synthesized and displayed on a 3D model.
14 is a flowchart illustrating a process of modifying a virtual prosthesis according to an embodiment of the present invention.

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. Effects and features of the present invention, and methods of achieving them will be apparent with reference to the embodiments described below in detail together with the drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various forms. In the following embodiments, the terms first, second, etc. are used for the purpose of distinguishing one component from other components rather than a restrictive meaning. Also, the singular forms “a”, “an” and “the” include plural forms unless the context clearly indicates otherwise. In addition, the terms including or have means that the features or components described in the specification are present, and does not preclude the possibility of adding one or more other features or components. In addition, in the drawings, components may be exaggerated or reduced in size for convenience of description. For example, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, and thus the present invention is not necessarily limited to the illustrated.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the same or corresponding components will be denoted by the same reference numerals, and redundant description thereof will be omitted. .

Overview

In the virtual prosthesis design system providing a virtual prosthesis design method according to the embodiment, when a patient's oral cavity is scanned and transmitted through an oral scanner, the model is modeled after 3D modeling the oral cavity with scan data received by the prosthetic design computing device. A dimensional oral model can be displayed and a prosthetic design graphical user interface (CAD) can be provided for designing a virtual prosthesis.

Furthermore, the virtual prosthesis design system may provide a prosthesis manufacturing data design interface (CAM) for generating prosthesis manufacturing data for manufacturing the prosthesis in the prosthesis manufacturing apparatus based on the data of the designed virtual prosthesis.

The virtual prosthesis design system according to this embodiment may provide an interface for designing a prosthesis by setting parameters of the virtual prosthesis step by step. At this time, the virtual prosthesis design system provides an interface for setting parameters for each step through an intuitive interface within the framework based on the analyzed oral information, so that an unskilled person can easily design a precise and accurate prosthesis, and the user's capability It is possible to design a prosthesis of uniform quality without depending on.

In particular, the virtual prosthesis design system according to the embodiment can easily and intuitively provide a graphical user interface for setting a margin line, which is one of the main points when setting the prosthesis parameter.

In addition, the designed virtual prosthesis may be synthesized and displayed on a three-dimensional oral model to provide a user to check whether the virtual prosthesis is suitable for the patient's mouth.

Herein, the above-described virtual prosthesis may mean a three-dimensional model in which an external shape of an artificial substitute of one or more teeth or related tissues is designed. For example, when the prosthesis is an implant, which is the material that serves as the root of the tooth, the prosthesis is the implant body inserted into the alveolar bone, the implant abutment connected to the implant body, and the upper side of the implant abutment. It can mean any one or all of the implant prosthesis (Crown) to cover and form the upper portion of the artificial tooth. Prostheses may also include inlays, onlays, crowns, laminates, bridges, copings, implants, or dentures. Can be. In addition, the prosthesis may, in a broad concept, also include tooth-related assistive devices, such as surgical guides or orthodontic devices.

Hereinafter, each component of the virtual prosthesis design system will be described in detail.

1 is an internal block diagram of a virtual prosthesis design system in accordance with an embodiment of the present invention.

Referring to FIG. 1, a virtual prosthesis design system according to an embodiment of the present invention may include an oral scanner 100 and a prosthesis design computing device 200.

-Oral Scanner

First, the oral cavity scanner 100 may scan (eg, digitally) the oral cavity of a patient and acquire scan data for three-dimensional modeling of the oral cavity of the patient.

The oral cavity scanner 100 according to this embodiment serves to transmit the scan data scanned in whole or in part to the prosthesis design computing device 200 through trigonometry, laser, image, or various other scanning techniques.

Thereafter, the scan data is transmitted to the prosthesis design computing device 200 so that the rest of the process until the design of the prosthesis is performed in the computing device 200. Before describing the prosthesis design method, each component of the prosthesis design computing device 200 will be described in detail.

The physical configuration of the prosthetic design computing device;

Referring back to FIG. 1, the prosthesis design computing device 200 according to the embodiment may include an input unit 210, an interface unit 220, a memory 230, a display 240, and a processor 250.

In detail, the input unit 210 may detect an execution input for turning on / off the computing device 200, a setting, execution input, etc. for various prosthetic design related functions. For example, the input unit 210 may include various buttons disposed on the prosthesis design computing device 200, may include a touch sensor coupled with the display 240, and the interface unit 220. It may include input devices such as a mouse and a keyboard connected through.

In addition, the prosthesis design computing device 200 may include an interface unit 220 that transmits and receives data with an external device via wired or wireless.

In detail, the interface unit 220 may serve as a data path with various kinds of external devices connected to the prosthesis design computing device 200. For example, the interface unit 220 may be connected to the oral scanner 100 to receive oral scanning data or transmit various scan-related setting inputs, and may be connected to a prosthetic manufacturing device to transmit prosthetic manufacturing data to provide a prosthesis. I can make it. In addition, the interface unit 220 may be connected to various devices (eg, a mouse, a keyboard, etc.) of the input unit 210 to receive a user input.

The interface unit 220 includes a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory 230 card card, and an identification module. It may include at least one of a port (port) for connecting, an audio input / output (I / O) port, a video input / output (I / O) port, and an earphone port. In addition, the interface unit 220 may include a wireless communication module such as Bluetooth or Wi-Fi.

In addition, the prosthesis design computing device 200 may include a memory 230.

The memory 230 may store a plurality of application programs or applications running in the prosthetic design computing device 200, data for operating the prosthesis design computing device 200, and instructions. .

For example, the memory 230 may include a prosthesis design program (CAD) for prosthetic design, and may include a prosthesis manufacturing management program (CAM) for receiving the designed prosthetic data and generating prosthesis manufacturing data. have. In particular, the memory 230 may include a program having a function of modifying the virtual prosthesis while providing the designed virtual prosthesis to the 3D oral model.

The memory 230 may be various storage devices such as a ROM, a RAM, an EPROM, a flash drive, a hard drive, and the like, and may include a web storage that performs a storage function of the memory 230 on the Internet. web storage) may be further included.

In addition, the prosthesis design computing device 200 may include a display 240 that displays a prosthesis design related graphic image.

The display 240 may be integrally mounted to the computing device or connected through the interface unit 220 as a separate display device.

Finally, the prosthesis design computing device 200 may include a processor 250 that controls the overall operation of each unit to execute the application program. The processor 250 may include application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, and microcontrollers. It may be implemented using at least one of a controller (micro-controllers), microprocessors (microprocessors), electrical units for performing other functions.

At least one program for designing the prosthesis is installed in the memory 230 of the prosthesis design computing device 200, and the processor 250 may provide various functions for designing the prosthesis using the program.

Functional Configuration of Prosthetic Design Computing Devices

2 is a block diagram of a virtual prosthesis design system in accordance with an embodiment of the present invention.

In detail, referring to FIG. 2, the prosthesis design program is installed in the processor 250, and may include an oral display module 201, a prosthesis design module 202, and a prosthesis manufacturing management module 203.

First, the oral cavity display module 201 may provide a function of displaying the three-dimensional oral model 240 through the oral scanner 100 or through scan data received from the outside.

In detail, the oral cavity display module 201 may generate a three-dimensional oral model by processing the scan data before modeling and display the oral cavity image with various graphic interfaces.

In addition, the oral cavity display module 201 may convert a 3D oral model file received from the outside into a format in which the prosthetic design module 202 can work, and then display the oral cavity image in which various graphic interfaces are possible.

In addition, the oral cavity display module 201 may acquire various oral information by analyzing the oral cavity model and / or the oral cavity image. In this case, the oral cavity display module 201 may align the oral cavity image to the arcline and analyze the oral cavity image aligned with the arcline to obtain accurate and various oral information.

Thereafter, the oral cavity display module 201 may display oral information together with the oral image to assist the doctor in understanding the oral state of the patient more easily, and provide the oral image and the oral cavity information to the prosthesis design module 202. Thus, the prosthetic design module 202 may help to provide a graphical user interface for designing a prosthesis.

The oral cavity display module 201 may be included in the prosthetic design module 202, which will be described below based on the prosthetic design module 202 including the oral display module 201.

The prosthesis design module 202 may be referred to as CAD (Computer®Aided Design, CAD), and the construction of a prosthesis by constructing a database for optimally planning, drawing, and modifying a prosthetic design. Prosthesis design capabilities can be provided to quickly and accurately handle all aspects of the job.

In addition, the prosthetic design module 202 may serve as an oral display module 201 that helps the user understand the data required for the prosthetic design in the form of oral images and oral information.

 In this way, by designing the prosthesis by using a computing system, it is possible to pursue efficiency by reducing the time and cost of design work, and to improve productivity and improve quality and reliability.

That is, the prosthesis design module 202 may display 240 the oral cavity information obtained from the 3D oral model together, and provide a graphic user interface for designing the prosthesis based on the oral model and the oral cavity information. Can be.

In particular, the prosthesis design module 202 includes an automatic mode for automatically detecting a margin line by directly analyzing a 3D oral model, a semi-automatic mode for setting a margin line based on analysis data and user input data, and a margin with an easy interface. At least two modes of the manual mode for manually setting the line may be provided as selectable.

And it can be provided to design the virtual prosthesis on the basis of the margin line set correctly.

Lastly, the prosthesis manufacturing management module 203 may be referred to as a computer-aided manufacturing (CAM) in which a computer is introduced in the field of manufacturing a prosthesis, and the prosthetic design is completed in the prosthetic design module 202, thereby completing the final design proposal. When the determination is made to enter the prosthesis manufacturing step, this may be the related technology.

In detail, the prosthesis manufacturing management module 203 allows the user to smoothly manage the manufacturing management design required during the entire manufacturing process, such as process design (process planning, production method and ordering), manufacturing technology, processing, and sub design required for processing. Prosthesis manufacturing management function can be provided to make it easy.

For example, the prosthesis manufacturing management module 203 may form a processing path of the prosthesis through the virtual milling program when the manufacturing apparatus is a milling apparatus, and transmit the formed processing path information and the prosthesis manufacturing data to the milling apparatus to prosthesis. This can be made.

Through the prosthesis design module 202 and the prosthesis manufacturing management module 203, a user can perform all operations from confirming the oral cavity image to the prosthetic design and the prosthesis manufacturing management.

-Virtual Prosthesis Design Method

Hereinafter, a method of designing a virtual prosthesis and synthesizing the designed virtual prosthesis into a 3D model will be described in detail with reference to FIGS. 3 to 14.

First, the prosthesis design module 202 may display a three-dimensional oral model. (S101)

The prosthesis design module 202 according to the embodiment may display a three-dimensional oral model, and at this time, may display the arc line and the three-dimensional oral model together, and analyze the three-dimensional oral model aligned to the arc line. The oral cavity information can be obtained and used in the future design of the virtual prosthesis.

In detail, in one embodiment, the prosthesis design module 202 receives the oral scan data from the oral scanner 100 and models the oral cavity in three dimensions based on the received oral scan data to generate a three-dimensional oral model. You can then display it.

In another embodiment, prosthetic design module 202 may display a three-dimensional oral model received from an external server.

The three-dimensional oral model may be a whole oral model based on scan data obtained by scanning the entire oral cavity including the maxilla, the mandible and the occlusal surface, and the oral model modeling at least one of the maxillary, mandibular and occlusal surfaces. It may be a partial oral model that models a part of the maxilla, a part of the mandible, or a part of the occlusal surface.

The prosthesis design module 202 may further display an arch line in addition to the three-dimensional oral model. Here, the arc line may mean a line such as a bow shape, a U shape, a horseshoe shape, or a semi-circle shape corresponding to the three-dimensional oral model.

The arc line may serve to be displayed to intuitively understand the position of the three-dimensional oral model with respect to the entire oral cavity of the patient. In addition, each area of the three-dimensional oral model can present a reference position for the entire oral cavity, which assists the computing device 200 to obtain more accurate and various oral information when analyzing the three-dimensional oral model aligned with the arc line. Can play a role.

Such arclines may be in a shape (eg, curvature, size, etc.) fixed by default. For example, an arcline of a pre-stored size and curvature that is specified to a size that generally displays the modeled three-dimensional oral model can be shown.

For example, as illustrated in FIG. 4, the prosthetic design module 202 may display 240 a partial three-dimensional oral model and an arc line together. As such, the partial three-dimensional oral model may be provided with an arc line so as to confirm the positional relationship with respect to the entire oral cavity.

In addition, the prosthesis design module 202 may provide an interface for aligning the 3D oral model on the arc line.

The prosthetic design module 202 can also provide an alignment interface to move the three-dimensional oral model or / and the arcline to align the three-dimensional oral model to the arcline. In detail, the user can correctly align the 3D oral model to the arcline through the alignment interface if the 3D oral model is not properly aligned to the arcline.

For example, the user may drag the 3D oral model to move it to an alignment position in the arc line. Here, the alignment position means that the spacing between the teeth and the arc line is uniform. At this time, if the size or curvature of the arc line is a problem, the user can change the size and curvature of the arc line to modify to correspond to the three-dimensional oral model. In another embodiment, placing the oral image in a coarse position inside the arcline and pressing the alignment button may automatically change the arcline and / or oral image to align the oral image to the arcline.

Once the oral model is aligned with the arcline, the prosthetic design module 202 may detect oral information based on the three-dimensional oral model aligned with the arcline. (S102)

Here, the oral cavity information may be related to the teeth related to the dental structure such as the alignment direction of the teeth (for example, Buccal direction and lingual direction), tooth number, side arc line, dental structure, angle between teeth and teeth, tooth spacing, tooth size, etc. Unique characteristic information may be included, and further, tooth state information such as color of a tooth, caries, tooth decay, tooth damage, tooth defect, and a prosthetic type of a damaged part may be included. In order to accurately obtain such oral information, when there is an arc line that is a reference when analyzing the 3D oral model, the 3D oral model analysis can be made more quickly and accurately.

For example, referring to FIG. 5, a side arc line 15S may further be displayed on the side oral image 10S, which is a side view of the three-dimensional oral model, and the side arc line 15S may further be a prosthesis to be designed later. It can be based on the shape setting of the clathrate of. For example, the slope of the antagonistic surface of the prosthesis may correspond to the slope of the side arc line 15S.

In particular, in the case of the partial 3D oral model, the prosthetic design module 202 may obtain a direction of a tooth, a tooth number, etc. based on an arc line, even if only a part of the oral cavity is divided. That is, the prosthetic design module 202 may acquire various oral information about the oral model even if the oral model includes only a partial area of the oral cavity, and thus may be effectively used in the future prosthetic design.

In addition, the prosthetic design module 202 can more easily detect the tooth number, tooth size, tooth caries, tooth decay, defect, degree of damage, occlusal surface (corresponding to the side arc line), and the like based on the arc line. Such oral information can be used to automatically set parameters of the prosthesis to be designed.

As such, the prosthesis design module 202 according to the embodiment may display a three-dimensional oral model based on the arc line to help the user intuitively determine the oral condition, and the three-dimensional oral cavity based on the arc line. Various and accurate oral information can be obtained by analyzing the model, and it can help to design the prosthesis more easily and quickly by helping to design the prosthesis based on the oral information.

The prosthetic design module 202 can then provide a parameter setting interface for designing the virtual prosthesis based on the three-dimensional oral model.

The prosthesis design module 202 according to the embodiment may provide a prosthesis design interface for designing a prosthesis according to sequential steps based on the oral information obtained by analyzing a 3D oral model based on an arc line. In detail, the prosthetic design interface makes it easy to determine the parameters for designing the prosthesis in each step sequentially by providing appropriate oral information for each step, and to synthesize and modify the 3D oral model through the determined parameters and oral information. , User can effectively design the prosthesis easily.

Here, the virtual prosthesis design parameters include the tooth area to be repaired, the prosthesis type, the margin line, the insertion axis, the prosthesis internal parameters (eg, minimum thickness, margin thickness, cement gap, contact distance, pontic base gap), prosthetic size, tooth alignment. And at least one parameter of orientation, side arclines, dental numbers of prostheses to be repaired, and virtual prosthetic scales.

These prosthetic design parameters may be manually set by the user according to the prosthetic design interface and may be automatically set by oral cavity information obtained by analyzing oral images based on arclines.

First, referring to FIG. 6, the prosthesis design module 202 may first provide an interface for setting a treatment area to be repaired in the 3D oral model and a virtual prosthesis type of the treatment area. (S103, S104)

In an embodiment, the prosthesis design module 202 may determine a partial region of the 3D oral model as a treatment area based on a user input for the displayed 3D oral model. For example, the user may select a treatment area to be repaired by inputting a specific point, a specific area, or a specific tooth in the 3D oral model.

In an embodiment, the treatment area may be an area for designing one prosthesis. In detail, the treatment area is an area for designing a prosthesis for one tooth, and if one point is selected by the user, one prosthesis for the damaged tooth of the selection point will be designed. Accordingly, the prosthesis design module 202 may extract the tooth number T of the damaged tooth from the oral cavity information and provide a design of the prosthesis matching the corresponding tooth number.

In addition, the specific point (c) in the treatment area selected by the user may be a center point where the designed virtual prosthesis will be placed.

Once the treatment area to be repaired is selected, the prosthetic design module 202 may determine the type of prosthesis to design in the treatment area.

Here, the prosthesis type may include an inlay, an onlay, a crown, a laminate, a bridge, a coping or an implant, a denture, and the like. have. In addition, the prosthesis may, in a broad concept, also include tooth-related assistive devices, such as surgical guides or orthodontic devices.

In detail, the prosthetic design module 202 may provide a user with an interface to list the types of prostheses to design in the treatment area and to select one of them.

In this case, the prosthesis design module 202 may receive a user setting input for a plurality of treatment areas, and provide a design of the plurality of prostheses at once, thereby shortening the prosthesis design time.

In summary, the user designates a first point in the three-dimensional oral model to determine the treatment area to be repaired, displays the determined dental number of the treatment area, selects a prosthesis type of the treatment area, and further repairs the treatment area. If so, by repeating the above process again, it is possible to complete the first step of the design of the prosthesis design parameters.

Referring to FIG. 7, when the prosthesis type is determined, the prosthesis design module 202 may determine a margin line of the treatment area to be repaired. (S105)

In detail, the margin line, which is the boundary between the prosthesis and the tooth (or the boundary between the prosthesis and the gum) in the treatment area, is one of the main parameters for designing the shape of the virtual prosthesis. It can provide an interface to quickly and easily set the margin line suitable for the oral cavity.

Hereinafter, a process of setting a margin line will be described in detail with reference to FIG. 8.

First, as shown in FIG. 7, the 3D oral model 10 of the dental region to be repaired is displayed, and the user modes 61 for setting the margin line may be provided as selectable. (S201)

In detail, to determine this margin line, the prosthesis design module 202 may selectably provide at least two of a manual mode, a semi-automatic mode, or an automatic mode for setting the margin line. (S202)

First, when the user selects the automatic mode, the prosthesis design module 202 may receive an input for selecting an edge by the user in the treatment area of the 3D oral model 10 of the treatment area. Thereafter, the prosthesis design module 202 automatically determines a margin line based on at least one of an extension direction of the edge and color difference for each gum region and gum area, damaged tooth, root, and adjacent tooth, based on the selected edge. And it can be displayed on the three-dimensional oral model (10). The prosthetic design module 202 may then provide a modification interface to manually correct the automatically determined margin line.

Next, when the user selects the semi-automatic mode, the prosthetic design module 202 may provide a semi-automatic mode for setting a margin line based on the user's input together with the oral model analysis information of the prosthetic design module 202. . (S203)

If a semi-automatic mode is provided, the prosthetic design module 202 allows the user to select one point of the edges of the three-dimensional oral model 10 in the treatment area and detect the edge based on the pointing input selected by the user. have. (S204)

In detail, the prosthesis design module 202 may detect an edge around the pointing input when the user makes a pointing input (eg, a double click) specifying a point.

In addition, the prosthesis design module 202 may form a predetermined line around the detected edge, and primarily move the pointer based on the edge after the setting of the pointing, and extend the predetermined line based on the edge thereof. To generate a line. (S205)

Finally, the prosthesis design module 202 may complete the margin line generation following the predetermined line and the extended line when the user's pointer reaches the initial pointing point. (S206)

That is, the semi-automatic mode uses two edges extracted through the user's pointer input and the 3D oral model 10 image analysis, so that the margin line is extracted on the edge extracted through the image analysis even if the user does not accurately draw the margin along the edge. By setting, the margin line can be provided easily and quickly.

The prosthesis design module 202 may then provide a modification interface to manually modify the semi-automatically determined margin line.

Next, when the user selects the manual mode, the prosthesis design module 202 may provide a manual mode in which the prosthesis design module 202 sets a margin line based on the user's input. (S207)

If a manual mode is provided, the prosthetic design module 202 may allow the user to select a point of one of the edges of the three-dimensional oral model 10 in the treatment area to detect the edge based on the pointing input selected by the user. have. (S208)

In detail, the prosthesis design module 202 may detect an edge around the pointing input when the user makes a pointing input (eg, a double click) specifying a point.

In addition, the prosthesis design module 202 may form a margin line by connecting the next user's pointing input and the previous pointing input, and the reference connecting the pointing input may be a detected edge.

That is, the prosthesis design module 202 may provide a manual mode that detects edges between the pointing inputs and forms margin lines along the edges between the pointing inputs when the user sequentially makes pointing inputs.

Finally, the prosthesis design module 202 may complete the margin line generation, primarily following the previous margin line and the extended line, once the user's pointer reaches the initial pointing point. (S209)

As such, once the margin line generation is completed, the prosthesis design module 202 may provide a modification interface for re-correcting the manually determined margin line.

The prosthesis design module 202 may determine the correction line to fix in the margin line when the correction interface is executed. (S210, S211)

In detail, the prosthesis design module 202 may set a correction line which is an area to be modified among the margin lines according to a user input.

For example, referring to FIG. 9A, the prosthesis design module 202 determines a center point P of an area to be corrected in the margin line ML based on a user's pointing input, based on the center point P. At least some of the lines on both sides may be set as a correction line RL.

In detail, the prosthesis design module 202 may receive a user input of selecting a center point P and then extending or shortening the correction line RL on both sides. For example, as shown in FIG. 9B, when the user moves the mouse upward while pressing the control key after inputting the center point P, the correction line RL may extend along the margin line ML. When the control key is released, the setting of the correction line RL at that time may be completed.

Conversely, if the user moves the mouse down while pressing the control key after inputting the center point (P), the correction line (RL) is shortened toward the center point (P). The setting of the correction line RL at the viewpoint may be completed.

When the correction line RL setting is completed, the prosthesis design module 202 may modify the margin line ML by moving the correction line RL together with the movement of the pointer (S212, S213).

In detail, when the pointer moves while the correction line RL is set, the prosthesis design module 202 may move the entire correction line RL based on the center point P toward the moving direction. At this time, the margin line ML other than the correction line RL is fixed, and the correction line RL and the margin line ML are continuously connected.

That is, as shown in FIG. 9C, when the pointer moves, the center point P moves toward the corresponding point, and the correction line RL may be changed to connect the center point P and the remaining correction lines RL. have.

Finally, if the user likes the modified correction line RL, the user may decide to correct the margin line ML with the correction line RL, and the prosthesis design module 202 may modify the correction line at the time of determining the user correction. You can modify the margin line (ML ') with (RL). (S214)

In summary, the prosthesis design module 202 provides various modes so that the user can easily draw the margin line ML in a desired mode, and then easily and quickly modify the margin line ML to suit the oral cavity. By providing a correction interface, the user's convenience and the quality of the prosthesis can be improved.

Returning to the description of the virtual prosthesis design, when the margin line setting is completed, the prosthesis design module 202 may provide an interface for determining an insertion axis that is an insertion direction of the prosthesis. (S106)

In an embodiment, the prosthetic design module 202 may provide for setting the insertion axis settings to match the viewpoint of viewing the three-dimensional oral model.

In detail, the prosthesis design module 202 may control to display the 3D oral model by changing the view point at which the user views the 3D oral model, and after the user changes the view point at the insertion axis direction determination step. If the changed view point is selected in the insertion axis direction, the corresponding view point can be set in the insertion axis direction.

At this time, the prosthesis design module 202 displays the block out area, which is the area of the prosthesis when the prosthesis is inserted when the prosthesis is inserted in the view point, in the 3D oral model, so that the user inserts the view point correctly. It can lead to selection in the axial direction.

For example, referring to FIG. 10, in the three-dimensional oral model, a view point facing the three-dimensional oral model may be indicated by an arrow 71, and the blockout area when the prosthesis is inserted in the direction of the arrow 71 may be represented. 75) can be displayed in a different color to induce the user to intuitively select the correct insertion axis direction.

Referring to FIG. 11, when the insertion axis direction is set, the prosthesis design module 202 may determine the remaining prosthesis parameters (S107).

In detail, in an embodiment, the prosthetic design module 202 may determine prosthetic design parameters that are yet to be determined and / or parameters associated with the prosthetic appearance.

Herein, the prosthetic internal parameter includes at least one of a minimum thickness, a margin thickness, a cement gap, a contact distance, and a pontic base gap. can do.

Such prosthetic internal parameters may be set to default values generally used statistically at the dentist, and therefore, the prosthetic internal parameter setting step according to the embodiment may again check and correct these basic or user setting values. Can be.

When the prosthesis design parameter is set in this way, the prosthesis design module 202 may determine the shape of the virtual prosthesis according to the determined prosthesis parameter. (S108)

In detail, the prosthetic design module 202 may detect a prosthetic shape in the library that matches the set prosthetic design parameter. For example, the prosthesis design module 202 may detect the prosthesis shape in the library 95 that matches the tooth number and the prosthesis type.

The prosthesis design module 202 may change the detected prosthesis shape according to the prosthesis design parameter or the oral cavity information.

For example, the prosthesis design module 202 may change the detected prosthesis shape according to the margin line ML and the prosthesis internal parameter. In addition, the prosthesis design module 202 may change the upper surface of the detected prosthesis shape to be inclined along the side arc line.

Once the shape of the virtual prosthesis is determined, the prosthetic design module can provide an interface to determine the scale of the virtual prosthesis. (

In detail, the prosthetic design module 202 may provide an interface for the user to set the scale of the virtual prosthesis in the three-dimensional oral model to synthesize the virtual prosthesis into the three-dimensional oral model to fit the patient's oral size.

For example, referring to FIG. 12, the prosthetic design module 202 may receive the length setting inputs P1 and P2 in the 3D oral model 10 to determine the scale of the virtual prosthesis. In detail, the user selects the first point P1 and the second point P2 in the three-dimensional oral model 10, and the length d of the line connecting the first point P1 and the second point P2. May be set to the scale of the virtual prosthesis 90.

When the scale setting is completed, the prosthesis design module 202 determines the size of the virtual prosthesis 90 so as to correspond to the user's scale setting, and sets the virtual prosthesis 90 on the three-dimensional oral model 10 to the determined size. I can display it. (S109)

In detail, as shown in FIG. 13, when the user sets the length corresponding to the long axis S of the treatment area as the user input, the prosthesis design module 202 may be configured to have the same length as that of the user input length d. The long axis S may be determined to be the input length d.

In addition, the prosthesis design module 202 may synthesize the virtual prosthesis 90 to the three-dimensional oral model 10 such that the virtual prosthesis 90 is located in the treatment area of the three-dimensional oral model 10.

In detail, the prosthetic design module 202 can determine the placement of the 3D oral model 10 with the designed virtual prosthesis 90 based on the prosthetic design parameters, oral cavity information, and / or user scale input.

For example, the prosthesis design module 202 may arrange a specific point (c) (eg, a center point) of the treatment area input by the previous user so that the center of the virtual prosthesis 90 is at this point. The arrangement direction of can be determined according to the insertion axis direction and the tooth alignment direction (B, L).

In addition, the prosthesis design module 202 may determine the placement direction of the prosthesis according to the direction D of the length line segment when the user inputs the scale setting.

Referring to FIG. 13, while the center of the virtual prosthesis 90 is positioned at a specific point c of the treatment area, an arrangement direction (eg, horizontal and vertical rotational directions) of the virtual prosthesis 90 is treated with an insertion axis direction. By matching the direction of tooth alignment of the region, it can be seen that the virtual prosthesis 90 is disposed in the three-dimensional oral model 10 in the correct direction and position.

If the virtual prosthesis 90 is displayed in the three-dimensional oral model 10, the prosthesis design module 202 may provide a retouch function that allows for manual modification of the virtual prosthesis 90.

In detail, referring to FIG. 14, the prosthesis design module 202 may view a virtual prosthesis 90 synthesized and displayed on the 3D oral model 10, and may enter a correction input by the user to fit the 3D oral model. have. In addition, the prosthesis design module 202 may change the virtual prosthesis 90 according to the user's correction input, and provide a retouch function to allow the user to modify the virtual prosthesis 90 while checking the modification in real time.

Thus, the prosthesis design module 202 may provide a prosthesis design interface that can easily design a prosthesis of uniform quality regardless of the user's proficiency by sequentially setting prosthesis design parameters according to the steps.

Embodiments according to the present invention described above can be implemented in the form of program instructions that can be executed by various computer components and recorded in a computer-readable recording medium. The computer-readable recording medium may include program instructions, data files, data structures, etc. alone or in combination. Program instructions recorded on the computer-readable recording medium may be specially designed and configured for the present invention, or may be known and available to those skilled in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks and magnetic tape, optical recording media such as CD-ROMs and DVDs, and magneto-optical media such as floptical disks. medium) and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions include not only machine code generated by a compiler, but also high-level language code that can be executed by a computer using an interpreter or the like. The hardware device may be modified with one or more software modules to perform the processing according to the present invention, and vice versa.

Particular implementations described in the present invention are embodiments and do not limit the scope of the present invention in any way. For brevity of description, descriptions of conventional electronic configurations, control systems, software, and other functional aspects of the systems may be omitted. In addition, the connection or connection members of the lines between the components shown in the drawings by way of example shows a functional connection and / or physical or circuit connections, in the actual device replaceable or additional various functional connections, physical It may be represented as a connection, or circuit connections. In addition, unless specifically mentioned, such as "essential", "important" may not be a necessary component for the application of the present invention.

In addition, although the detailed description of the present invention has been described with reference to a preferred embodiment of the present invention, those skilled in the art or those skilled in the art having ordinary knowledge in the technical field described in the claims to be described later It will be understood that various modifications and variations can be made in the present invention without departing from the scope of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (10)

In the method for setting the margin line of the parameters for designing a virtual prosthesis,
Displaying a three-dimensional oral model including a treatment area;
Determining a mode for setting a margin line in the treatment area;
Setting a first margin line in the determined mode;
Providing a modification interface to modify the first margin line according to a user input; And
Generating a final margin line by correcting the first margin line along the correction interface;
Providing a correction interface for modifying the first margin line according to a user input,
Setting at least some of the margin lines as correction lines;
Changing the correction line according to a user's pointer movement;
How to set margin line for designing virtual prosthesis. The method of claim 1,
Determining a mode for setting the margin line,
Selecting at least one of automatic mode, semi-automatic mode or manual mode.
How to set margin line for designing virtual prosthesis. The method of claim 2,
Setting the first margin line in the automatic mode,
Receiving an input for selecting an edge of a user, and automatically generating a margin line according to the selected edge;
How to set margin line for designing virtual prosthesis. The method of claim 2,
Setting the first margin line in the semi-automatic mode,
Detecting an edge based on a user's pointing input, forming a predetermined line along the edge, and extending the predetermined line based on an edge as the user moves the pointer;
How to set margin line for designing virtual prosthesis. The method of claim 2,
Setting the first margin line in the manual mode,
Detecting an edge based on a user's pointing input, and generating a margin line by connecting a user's pointing input and a previous pointing input along the edge;
How to set margin line for designing virtual prosthesis. delete The method of claim 1,
Setting at least some of the margin lines as correction lines,
Determining a center point of an area to be modified in the margin line;
Setting at least some lines on both sides of the center point according to a user input as a correction line;
How to set margin line for designing virtual prosthesis. The method of claim 7, wherein
Changing the correction line according to the user's pointer movement,
Extending or shortening the correction line to move the center point to a movement position of the pointer.
How to set margin line for designing virtual prosthesis. The method of claim 8,
If there is a correction decision input by the user, further comprising correcting the margin line with the modified correction line upon the determination input;
How to set margin line for designing virtual prosthesis. The method of claim 1,
Generating the virtual prosthesis based on the determined final margin line;
How to set margin line for designing virtual prosthesis.

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