KR102004449B1 - method for designing Virtual prosthesis - Google Patents

Abstract

The virtual prosthesis designing method includes: displaying a three-dimensional oral model; Designing an virtual prosthesis based on the three-dimensional oral model; Displaying the virtual prosthesis on the three-dimensional oral model; Providing a retouch interface for modifying an virtual prosthesis on the three-dimensional oral model; And displaying a deformed virtual virtual prosthesis as the retouch function is performed.

Description

A method for designing a virtual prosthesis

The present invention relates to a virtual prosthesis design method.

Impression in the dental prosthesis manufacturing process is an important clinical process for diagnosing patients, establishing future treatment plans, and building accurate dental prosthesis.

Typical impression methods require skilled technicians to select the appropriate impression material according to the procedure and to make accurate impressions. Repetition of the impression may be inevitable due to various factors such as impression modification due to wrong selection or use of the impression material, vomiting response of the patient irrespective of the skill of the surgeon, and open defect. In addition, even in the stage of making the gypsum model after the impression taking, it may cause errors in the production of the dental prosthesis due to the limit of the detailed reproduction of the material and the abrasion.

Therefore, studies are being conducted to automate the utilization and design and production of a computer for the design and processing of a dental prosthesis that proceeds manually.

In detail, the oral cavity is digitally scanned using an oral scanner, and the scanned oral data is modeled and displayed in three dimensions. Then, the dental prosthesis is computerized on the basis of the three-dimensional oral model and a prosthesis production system Is being actively developed.

In particular, there is a growing interest in prosthetic design technology that displays the mouth image modeled in the prosthesis production system for the user to easily recognize and design the precise and aesthetic prosthesis using the displayed oral image.

Recently, the prosthesis design system is trying to provide the oral information that helps the design of the prosthesis by analyzing the oral image through the rapidly developing image analysis tool. However, since the whole oral image analysis does not have the standard of image analysis, . Particularly, when analyzing a partial oral image, there is a problem that image analysis is almost impossible due to missing information on the entire oral cavity.

The prosthetic design system provides a graphical user interface (GUI) for designing virtual prostheses, most of which allow the virtual prosthesis to be designed through a drawing interface that is dependent on the operator's ability, There is a problem that the quality is dependent on the ability of the operator and the working time is excessive.

In addition, the prosthetic design system can provide an interface for modifying the virtual prosthesis after the virtual prosthesis is designed so that the virtual prosthesis is synthesized in the three-dimensional oral model to confirm that the prosthesis is suitable for the patient's mouth.

However, the virtual prosthesis modification interface also requires modification of the virtual prosthesis through the drawing interface like the design interface, so that the quality of the virtual prosthesis is uneven and the correction operation takes a long time.

KR 10-2016-0048805 A EP 2644155 A1

SUMMARY OF THE INVENTION It is an object of the present invention to provide an interface for intuitively and easily modifying a virtual prosthesis synthesized in a three-dimensional oral model.

The virtual prosthesis designing method includes: displaying a three-dimensional oral model; Designing an virtual prosthesis based on the three-dimensional oral model; Displaying the virtual prosthesis on the three-dimensional oral model; Providing a retouch interface for modifying an virtual prosthesis on the three-dimensional oral model; And displaying the deformed virtual prosthesis as the retouch function is performed.

The virtual prosthesis designing method according to the embodiment can provide a prosthesis design interface that can easily design uniform quality prosthesis irrespective of the user's proficiency by sequentially setting the prosthesis design parameters in accordance with the steps.

In addition, the virtual prosthetic design method according to the embodiment provides the virtual prosthesis designed at a precise position of the three-dimensional oral model so that the design of the virtual prosthesis can be confirmed accurately, and the virtual prosthesis displayed in this manner can be viewed intuitively It is possible to provide a prosthetic design modification interface that can be modified with an interface.

More specifically, the virtual prosthetic design method according to the embodiment provides a variety of retouch functions and provides an optimized interface for each purpose of the retouch function, so that even a novice can easily modify the virtual prosthesis intuitively in a desired direction.

In addition, the method of designing an virtual prosthesis according to an embodiment of the present invention provides a fitting function to automatically align the end line of the virtual prosthesis with the margin line, thereby minimizing unnecessary work.

In addition, the virtual prosthesis designing method according to the embodiment can assist the user in utilizing the retouch function by displaying the state of the virtual prosthesis according to the retouch function according to the situation or the user's selection.

1 is a block diagram of a physical configuration of a virtual prosthesis design system in accordance with an embodiment of the present invention.
2 is a block diagram of a functional configuration of a virtual prosthesis design system according to an embodiment of the present invention.
3 is a flowchart illustrating a process of displaying oral information by the virtual prosthetic design system according to an embodiment of the present invention.
FIGS. 4A and 4B are examples of screens displaying a three-dimensional oral model according to an embodiment of the present invention.
FIG. 5A is an example of a screen for setting the position and type of the virtual prosthesis according to the embodiment of the present invention, FIG. 5B is an example of a margin line setting screen of the restoration area according to the embodiment of the present invention, FIG. 5D is an example of a screen for setting an insertion axis direction of a prosthesis according to an embodiment, and FIG. 5D is an example of a parameter setting screen for a prosthesis according to an embodiment of the present invention.
6 is an example of a screen for setting a scale of a designed virtual prosthesis according to an embodiment of the present invention.
FIG. 7 is an example of a screen in which a virtual prosthesis designed according to the scale set in FIG. 6 is synthesized into a three-dimensional model.
8 is a flowchart illustrating a process of modifying an virtual prosthesis according to an embodiment of the present invention.
9 is an example of a main screen of the virtual prosthesis retouch interface according to the embodiment of the present invention.
FIG. 10A shows a screen for adjusting the intensity of a brush pointer according to an embodiment of the present invention, and FIG. 10B shows a screen for adjusting a size of a brush pointer according to an embodiment of the present invention.
FIG. 11 illustrates applying smoothing correction to an imaginary prosthesis according to an embodiment of the present invention.
FIG. 12 illustrates applying Ed-on correction to an virtual prosthesis according to an embodiment of the present invention.
13 shows a state in which groove correction is applied to the virtual prosthesis according to the embodiment of the present invention.
14 shows a state in which a grab correction is applied to an virtual prosthesis according to an embodiment of the present invention.
FIG. 15 illustrates the application of scale correction to an imaginary prosthesis according to an embodiment of the present invention.
16 shows a state in which a shifting correction is applied to an virtual prosthesis according to an embodiment of the present invention.
17 shows a state in which a rotation correction is applied to an virtual prosthesis according to an embodiment of the present invention.
FIG. 18 shows a marine line fitting function according to an embodiment of the present invention.
FIG. 19 shows a view for confirming the thickness of virtual prosthesis at a specific point according to an embodiment of the present invention.
FIG. 20 shows a screen displaying a dark region outside the minimum thickness according to an embodiment of the present invention.
FIG. 21 shows a distance checking function in a three-dimensional oral model according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects and features of the present invention and methods of achieving them will be apparent with reference to the embodiments described in detail below with reference to the drawings. However, the present invention is not limited to the embodiments described below, but may be implemented in various forms. In the following embodiments, the terms first, second, and the like are used for the purpose of distinguishing one element from another element, not the limitative meaning. Also, the singular expressions include plural expressions unless the context clearly dictates otherwise. Also, the terms include, including, etc. mean that there is a feature, or element, recited in the specification and does not preclude the possibility that one or more other features or components may be added. Also, in the drawings, for convenience of explanation, the components may be exaggerated or reduced in size. For example, the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of explanation, and thus the present invention is not necessarily limited to those shown in the drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to like or corresponding components throughout the drawings, and a duplicate description thereof will be omitted .

- Overview

The virtual prosthesis designing system that provides the virtual prosthesis designing method according to the embodiment, when the patient's mouth is scanned and transmitted through the oral scanner, the mouth is three-dimensionally modeled by the scan data received by the prosthesis design computing device, Dimensional mouth model, and can provide a prosthetic design graphic user interface (CAD) for designing virtual prostheses on the basis thereof.

Furthermore, the virtual prosthesis design system can provide a prosthetic manufacturing data design interface (CAM) that generates prosthesis manufacturing data for manufacturing the prosthesis in the prosthesis manufacturing apparatus based on the designed prosthesis data.

The virtual prosthesis design system according to this embodiment can provide an interface for designing the prosthesis by setting the parameters of the virtual prosthesis step by step. At this time, the virtual prosthesis design system can provide precise and accurate restorations easily for unskilled persons by providing the interface for setting the parameters for each step through the intuitive interface based on the analyzed oral information, It is possible to design a prosthesis of uniform quality without depending on the wearer.

In addition, the virtual prosthesis design system according to the embodiment can synthesize and display a designed virtual prosthesis on a three-dimensional oral model, and provide the user with confirmation that the virtual prosthesis is suitable for the patient's mouth.

At this time, the virtual prosthetic design system can provide a retouch function capable of correcting the synthesized virtual prosthesis while viewing the three-dimensional oral model. This retouching capability allows the virtual prosthesis to be optimized for a three-dimensional oral model by providing an easy and intuitive interface for each purpose of modifying the virtual prosthesis.

Herein, the above-mentioned virtual prosthesis can be understood as a three-dimensional model in which the contour of one or more teeth or an artificial substitute of related tissue is designed. For example, when a prosthesis is an implant, which is a material that serves as a root of a tooth, the prosthesis includes an implant body inserted into the alveolar bone, an implant abutment connected to the implant body, And an implant prosthesis that covers the implant and forms an upper portion of the artificial tooth. Also, the types of prostheses include inlay, onlay, crown, laminate, bridge, coping, implant or denture. . In addition, the prosthesis may, in its broadest sense, also include a tooth-related auxiliary device such as a surgical guide or a corrective device.

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

1 is an internal block diagram of a virtual prosthesis design system according to an embodiment of the present invention.

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

- Oral Scanner

First, the oral scanner 100 can acquire scan data for three-dimensionally modeling the patient's mouth by scanning (e.g., digitally raising) the patient's mouth.

The oral scanner 100 according to this embodiment plays the role of transmitting scan data, which has been scanned all or a part of the oral cavity, to the prosthesis design computing device 200 through trigonometry, laser, image or various various scanning techniques.

Thereafter, the scan data is transferred to the prosthetic design computing device 200 and then the remaining process from designing the prosthesis to the computing device 200 is performed. Before describing the method of designing a prosthesis, each structure of the prosthetic design computing apparatus 200 will be described in detail first.

- Physical configuration of prosthetic design computing device

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

Specifically, the input unit 210 can detect execution inputs for turning on / off the computing device 200, settings for various prosthesis design related functions, execution inputs, and the like. For example, the input 210 may include various buttons disposed on the prosthetic design computing device 200, may include a touch sensor coupled with the display 240, and may include an interface 220 Such as a mouse, a keyboard, and the like, connected thereto.

In addition, the prosthetic design computing device 200 may include an interface unit 220 for transmitting and receiving data to / from an external device by wire or wireless.

In detail, the interface unit 220 may serve as a data path to various kinds of external devices connected to the prosthetic design computing device 200. For example, the interface unit 220 may be connected to the oral scanner 100 to receive oral scan data or transmit various scan-related setting inputs. The interface unit 220 is connected to the prosthesis manufacturing apparatus to transmit prosthesis manufacturing data, Can be produced. The interface unit 220 may be connected to various devices (e.g., a mouse, a keyboard, etc.) of the input unit 210 to receive user input.

The interface unit 220 may include a device having a wired / wireless headset port, an external charger port, a wired / wireless data port, a memory card port, An audio input / output port, a video input / output port, and an earphone port, which are connected to each other. In addition, the interface unit 220 may include a wireless communication module such as Bluetooth or Wi-Fi.

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

This memory 230 may store a plurality of application programs (application programs or applications) running on the prosthetic design computing device 200, data for operation of the prosthetic design computing device 200, .

For example, the memory 230 may include a prosthesis design program (CAD) for prosthesis design, and may include a prosthesis manufacturing management program (CAM) that receives the designed prosthesis data to generate prosthesis production data. have. In particular, the memory 230 may include a program having the function of modifying the virtual prosthesis, while synthesizing and providing the designed virtual prosthesis to the three-dimensional oral model.

The memory 230 may be a variety of storage devices such as a ROM, a RAM, an EPROM, a flash drive, a hard drive, and the like, and a web storage web storage).

In addition, the prosthetic design computing device 200 may include a display 240 that displays graphical images associated with the prosthesis design.

Such a display 240 may be integrated into the computing device, or may be connected through the interface 220 as a separate display device.

Finally, the prosthetic design computing device 200 may include a processor 250 that controls the overall operation of each unit to execute an application program. Such a processor 250 may be implemented as a processor, such as application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs) Micro-controllers, microprocessors, and other electronic units for performing other functions.

In the memory 230 of the prosthetic design computing device 200, at least one program for designing the prosthesis is installed, and the processor 250 can provide various functions for designing the prosthesis using such a program.

- functional configuration of prosthetic design computing device

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

2, the processor 250 described above may be provided with a prosthetic design program and may include an oral display module 201, a prosthetic design module 202, and a prosthesis manufacturing management module 203.

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

In detail, the oral display module 201 can process the pre-modeling scan data to generate a three-dimensional oral model, and display it as a mouth image capable of various graphic interfaces.

In addition, the oral display module 201 may convert the 3D model file received from the outside into a format compatible with the operation of the prosthodontic design module 202, and display it as a mouth image capable of various graphic interfaces.

In addition, the oral display module 201 can image-analyze the oral model and / or oral image to obtain various oral information. At this time, the oral display module 201 can obtain accurate and various oral information by aligning the oral image with the arc line and analyzing the oral image aligned with the arc line.

The oral display module 201 may then display oral information along with the oral image to assist the physician in understanding the patient's oral condition more easily and provide such oral image and oral information to the prosthetic design module 202 So that the prosthetic design module 202 can help provide a graphical user interface for designing the prosthesis.

The oral display module 201 may be included in the prosthesis design module 202. In the following description, the prosthodontic design module 202 includes the oral display module 201. [

The prosthesis design module 202 may be referred to as a CAD (Computer Aided Design), and it is possible to construct a database that allows planning, drawing, and correction of the prosthesis design to be performed in an optimal state. It can provide a prosthetic design function that can quickly and accurately handle all aspects of the task.

In addition, the prosthetic design module 202 may serve as an oral display module 201 that displays the data necessary for the prosthesis design in the form of an oral image and oral information to help the user understand the structure.

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

That is, the prosthetic design module 202 may display (240) the oral information acquired from the three-dimensional oral model and provide a graphical user interface for designing a prosthesis based on the oral model and oral information .

In addition, the prosthetic design module 202 can display the virtual prosthesis designed and synthesized with the three-dimensional oral model, and can provide a retouch function capable of modifying the virtual prosthesis synthesized by the user to a three-dimensional oral model have.

These retouch functions can be provided in an intuitive user interface that is optimized for the purpose of the modification.

Finally, the prosthesis manufacturing management module 203 may be referred to as a computer aided manufacturing (CAM) machine in which a computer is introduced to the field of manufacturing a prosthesis. The prosthesis design module 202 is completed, The prosthesis manufacturing step, which may be a relevant technique at this time.

More specifically, the prosthesis manufacturing management module 203 allows the user to design a manufacturing management design necessary for the entire manufacturing process such as process design (production planning and order determination), manufacturing technology, The prosthesis manufacturing management function can be provided.

For example, the prosthesis manufacturing management module 203 can form a machining path of the prosthesis through a virtual milling program when the manufacturing apparatus is a milling apparatus, and transmits the formed machining path information and the prosthesis manufacturing data to the milling apparatus, Can be produced.

Through the prosthetic design module 202 and the prosthesis manufacturing management module 203, the user can perform all the tasks from the confirmation of the oral image to the design of the prosthesis and the manufacture of the prosthesis.

- Virtual prosthesis design method

Hereinafter, a method of designing and designing the virtual prosthesis and synthesizing the virtual prosthesis into a three-dimensional model and displaying the virtual prosthesis will be described in detail with reference to FIGS. 3 to 7. FIG.

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

The prosthodontic design module 202 according to the embodiment can display a three-dimensional oral model, in which an arc line and a three-dimensional oral model can be displayed together, and a three-dimensional oral model aligned to an arc line can be analyzed Oral information can be obtained and used for future virtual prosthesis design.

In detail, in one embodiment, the prosthetic design module 202 receives the data of the mouth scans 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 And then display it.

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

Such a three-dimensional oral model may be a whole oral model based on scan data obtained by scanning all of the oral cavity including the maxilla, mandible and occlusal surface, and may be an oral model that models at least one of the maxilla, mandible, And may be a partial oral model that models some areas of the maxilla, some areas of the mandible, or some areas of the occlusal surface.

And the prosthetic design module 202 may display an arch line in addition to the three-dimensional oral model. Here, the arc line may mean a line such as an arcuate shape, a U shape, a horseshoe shape or a semicircular shape corresponding to a three-dimensional oral model.

Such an arc line can be displayed so as to intuitively understand the position and the like of the three-dimensional oral model with respect to the entire oral cavity of the patient. In addition, each of the regions of the three-dimensional oral model can present a reference to the entire oral cavity, thereby assisting the computing device 200 to acquire more accurate and versatile oral information in analyzing the three-dimensional oral model aligned to the arc line Can play a role.

Such an arc line may be in a form in which the shape (e.g., curvature, size, etc.) is fixed by default. For example, an arc line of pre-stored day size and curvature may be shown that is sized to generally represent a modeled three-dimensional oral model.

For example, as shown in FIG. 4A, the prosthesis design module 202 can display (240) an entire three-dimensional oral model and an arc line together, and an alignment interface for aligning the three- . In addition, the prosthesis design module 202 can display the information (21) about the maxillary or mandibular perception of the three-dimensional oral model 240 displayed on the display 240 and the setting input interface 22 for correcting the display if the display is wrong .

In addition, as shown in FIG. 4B, the prosthesis design module 202 may display (240) the partial three-dimensional oral model and the arc line together. Thus, a partial three-dimensional oral model may be provided with an arc line so that the positional relationship with the entire oral cavity can be confirmed.

The prosthesis design module 202 may thus provide an interface for aligning the three-dimensional oral model with the arc line.

And the prosthetic design module 202 may provide an alignment interface that moves the three-dimensional oral model or / and arc line to align the three-dimensional oral model with the arc line. In detail, the user can properly align the three-dimensional oral model with the arc line through the alignment interface if the three-dimensional oral model is not properly aligned in the arc line.

For example, the user can move the three-dimensional oral model to an alignment position in the arc line by dragging. Here, the alignment position means that the distance between each tooth and the arc line is uniform. At this time, if the size or the curvature of the arc line is a problem, the user can change the size and the curvature of the arc line to correspond to the three-dimensional oral model. In another embodiment, the oral image can be aligned to the arc line by automatically changing the arc line and / or oral image by pressing the align button after placing the oral image in a rough position within the arc line.

Once the oral model is aligned with the arc line, the prosthesis design module 202 can detect oral information based on a three-dimensional oral model aligned with the arc line.

Herein, the oral information is information about the tooth structure related to the dental structure such as the direction of alignment of the teeth (e.g., Buccal direction and lingual direction), the tooth number, the side arc line, the dental structure, the angle between teeth and teeth, And may further include tooth condition information such as the color of teeth, caries, tooth decay, tooth damage, tooth defect, and the type of prosthesis of a damaged part. In order to obtain such oral information accurately, the analysis of the 3D oral model can be performed more quickly and accurately when there is a reference arc line in the analysis of the 3D oral model.

Particularly, in the case of the partial three-dimensional oral model, the prosthetic design module 202 can acquire the tooth direction, the tooth number, and the like on the basis of the arc line, even if only a part of the oral cavity is a divided model. That is, even if the prosthetic design module 202 is a mouth model including only a partial region of the oral cavity, it is possible to acquire various oral information about the oral cavity model, so that it can be utilized effectively in designing a prosthesis later.

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

Thus, the prosthetic design module 202 according to the embodiment can display a three-dimensional oral model based on the arc line to help a user intuitively grasp the oral condition, and the three-dimensional oral cavity By analyzing the image of the model, it is possible to acquire various and accurate oral information, and it is possible to design the prosthesis more easily and easily by helping to design the prosthesis based on such oral information.

The prosthetic design module 202 may then provide a parameter setting interface for the design of the virtual prosthesis based on the three-dimensional oral model. (S102)

The prosthodontic design module 202 according to an embodiment may provide a prosthesis design interface that allows a prosthesis to be designed according to sequential steps based on oral information obtained by analyzing a three-dimensional oral model based on an arc line. In detail, the prosthesis design interface makes it possible to easily determine the parameters for designing the prosthesis in each step sequentially, providing proper oral information for each step, and synthesizing and modifying the three-dimensional oral model through the determined parameters and oral information , The user can easily and effectively design the prosthesis.

Herein, the virtual prosthesis design parameters include the tooth area to be restored, the prosthesis type, the margin line, the insertion axis, the internal parameters (e.g., minimum thickness, margin thickness, cement gap, contact distance, Direction, a side arc line, a tooth number of the prosthesis to be restored, and an imaginary prosthesis scale.

These prosthesis design parameters can be manually set by the user according to the prosthesis design interface, and can be automatically set by the acquired oral information by analyzing the oral image based on the arc line.

Referring first to FIG. 5A, the prosthetic design module 202 may first provide an interface for setting the restoration area to be restored in the three-dimensional oral model and the virtual prosthesis type of the restoration area. In an embodiment, prosthodontic design module 202 may determine a partial area of the three-dimensional oral model as a restoration area based on user input for the displayed three-dimensional oral model. For example, the user can select a restoration area to be restored by making an input specifying a specific point, a specific area, or a specific tooth in the three-dimensional oral model.

In an embodiment, the restoration area may be an area for designing one prosthesis. More specifically, the restoration area is an area for designing a prosthesis for one tooth. When one point is selected by the user, one restoration for the damaged tooth of the selected point will be designed. Therefore, the prosthodontic design module 202 can extract the tooth number T of the damaged tooth from the oral information, and provide it to design the prosthesis matched to the tooth number.

And the specific point (c) in the restoration area selected by the user may be the center point at which the subsequently designed virtual prosthesis will be placed.

Once the restoration area to be restored is selected, the prosthesis design module 202 can determine the prosthesis type to be designed in the restoration area.

Here, the prosthesis type may include an inlay, an onlay, a crown, a laminate, a bridge, a coping or an implant, a denture, have. In addition, the prosthesis may, in its broadest sense, also include a tooth-related auxiliary device such as a surgical guide or a corrective device.

In detail, the prosthetic design module 202 can provide the user with an interface to list the type of prosthesis to be designed in the restoration area and select one of them.

At this time, the prosthetic design module 202 receives a user setting input for a plurality of restoration areas, and provides a plurality of prostheses to be designed at a time, thereby shortening the prosthesis design time.

To summarize, the user designates the first point in the three-dimensional oral model to be the restoration area to be restored, the tooth number of the determined restoration area is displayed, the restoration type of the restoration area is selected, By repeating the above procedure again, it is possible to complete the setting of the prosthesis design parameters in the first step.

Referring to FIG. 5B, once the prosthesis type is determined, the prosthesis design module 202 may determine a margin line of the restoration area to be restored.

More specifically, the prosthetic design module 202 can determine the margin line, which is the boundary between the prosthesis and the tooth (or the boundary between the prosthesis and the gum) within the restoration area.

To determine such a margin line, the prosthesis design module 202 may be provided to design the margin line manually, semi-automatically or automatically.

First, when the user selects the automatic mode, the prosthetic design module 202 detects the gums, color differences of the gum area, damaged teeth, tooth roots, adjacent teeth, and the like of the three-dimensional oral model of the restoration area, And can be displayed on a three-dimensional oral model. The prosthesis design module 202 may also provide a correction interface that allows for manual correction of the automatically determined margin line.

Referring to FIG. 5C, once the margin line 60 is determined, the prosthesis design module 202 may provide an interface for determining an insertion axis, which is the insertion direction of the prosthesis. In an embodiment, the prosthesis design module 202 may provide for setting the insertion axis setting to match a viewpoint that views the three-dimensional oral model.

More specifically, the prosthodontic design module 202 can control the user to change the viewpoint that the user views the three-dimensional oral model to display the three-dimensional oral model, and after the user changes the viewpoint When the changed view point is selected in the direction of the insertion axis, the corresponding view point can be set in the direction of the insertion axis.

At this time, the prosthodontic design module 202 displays the view point direction and the block out area, which is an area where the prosthesis is caught when inserting the prosthesis at the view point, on the three-dimensional oral model so that the user can correctly insert the view point It is possible to induce selection in the axial direction.

For example, referring to FIG. 5B, in a three-dimensional oral model, a view point looking at a three-dimensional oral model can be indicated by an arrow 71, and when a prosthesis is inserted in the direction of the arrow 71, 75) in a different color so that the user can intuitively select the correct insertion axis direction.

5D, once the insertion axis direction is set, the prosthesis design module 202 can determine the prosthesis parameters

More specifically, in embodiments, the prosthodontic design module 202 may determine parameters not yet determined in the prosthesis design parameters, such as prosthetic internal parameters and / or prosthesis contour.

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

The internal parameter of the prosthesis may be set to a value that is generally used statistically in the dentistry. Accordingly, the step of setting the internal parameter of the prosthesis according to the embodiment is a step of once again checking and correcting the basic setting or the user setting value Lt; / RTI >

Once the prosthesis design parameters are set in this way, the prosthesis design module 202 can determine the shape of the virtual prosthesis according to the determined prosthesis parameters. (S103)

More specifically, the prosthesis design module 202 can detect in the library the prosthesis shape that matches the set prosthesis design parameters. For example, the prosthesis design module 202 can detect in the library 95 the prosthesis shape that matches the tooth number and prosthesis type.

And the prosthetic design module 202 may change the detected prosthesis shape according to the prosthesis design parameters or oral information.

For example, the prosthetic design module 202 may change the detected prosthesis shape according to the margin line 60, the prosthesis internal parameters. The prosthesis design module 202 can also change the top surface of the detected prosthesis shape to be inclined along the side arc line.

Once the shape of the virtual prosthesis is determined, the prosthesis design module can provide an interface for determining the scale of the virtual prosthesis. (S104)

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

For example, referring to FIG. 6, the prosthetic design module 202 may determine the scale of the virtual prosthesis by receiving the length setting inputs P1, P2 within the three-dimensional oral model 10. More specifically, the user selects the first point P1 and the second point P2 in the three-dimensional oral model 10 to calculate the length d of the line segment connecting the first point P1 and the second point P2, Can be set to the scale of the virtual prosthesis (90).

When the scale setting is completed, the prosthetic design module 202 determines the size of the virtual prosthesis 90 so as to correspond to the scale setting of the user, and sets the virtual prosthesis 90 in the determined size on the three-dimensional oral model 10 Can be displayed. (S105)

7, when the user sets a length corresponding to the long axis S of the restoration area as a user input, the prosthodontic design module 202 calculates the length of the virtual prosthesis 90 And the long axis S may be determined to be the input length d.

The prosthetic design module 202 can also synthesize the virtual prosthesis 90 into the three-dimensional oral model 10 so that the virtual prosthesis 90 is located in the restoration area of the three-dimensional oral model 10.

The prosthetic design module 202 can determine the placement of the three-dimensional oral model 10 on the virtual prosthesis 90 designed based on prosthetic design parameters, oral information, and / or user scale input.

For example, the prosthetic design module 202 positions the virtual prosthesis 90 such that the specific point c (e.g., center point) of the restoration area entered by the previous user is at the center of the virtual prosthesis 90, Can be determined in accordance with the insertion axis direction and the tooth alignment directions (B, L).

Also, the prosthetic design module 202 may determine the placement direction of the prosthesis along the direction D of the length line segment when the scale setting of the user is input.

7, the placement direction of the virtual prosthesis 90 (for example, the horizontal and vertical rotational directions) is shifted from the insertion axis direction to the restoring position by positioning the center of the virtual prosthesis 90 at the specified point c of the restoration area, It can be confirmed that the virtual prosthesis 90 is arranged in the three-dimensional oral model 10 in the correct direction and position.

When the virtual prosthesis 90 is displayed on the three-dimensional oral model 10, the prosthodontic design module 202 can provide a retouch function that allows the virtual prosthesis 90 to be manually modified. (S208)

More specifically, the prosthetic design module 202 can view the virtual prosthesis 90 synthesized and displayed on the three-dimensional oral model 10, and input the correction that the user inputs to fit the three-dimensional oral model. The prosthetic design module 202 can change the virtual prosthesis 90 according to the user's correction input and provide a retouch function so that the user can correct the virtual prosthesis 90 while checking the correction in real time.

Hereinafter, the process of providing the retouch function by the prosthodontic design module 202 will be described in detail with reference to FIGS. 8 to 21. FIG.

Referring to FIG. 8, the prosthetic design module 202 can provide a retouch function capable of modifying parameters such as contour and strength of the virtual prosthesis 90. More specifically, the prosthetic design module 202 can receive a retouch function selection input to be modified by the user while the three-dimensional oral model 10 in which the virtual prosthesis 90 is disposed is displayed. (S201)

The function of retouching the virtual prosthesis 90 includes a function of retracting the virtual prosthesis 90 such as groove, smooth, edon, or grab, and a function of restoring the strength of the virtual prosthesis 90 A retouch function for correcting at least one of a retouch function for modifying the thickness, a position changing function for scaling, position or rotation of the virtual prosthesis 90, and a prosthesis internal parameter correcting function.

When the retouch function is selected, the prosthetic design module 202 can provide a brush pointer for applying the retouch function to the three-dimensional oral model 10, and set parameters of the brush pointer. (S202)

For example, the prosthetic design module 202 may display a circular brush pointer for applying a retouch function to the virtual prosthesis 90, and the brush pointer may correspond to the user's input.

The brush pointer has a strength to which the retouch function is applied, a parameter for an area to which the retouch function is applied, and a shape of the brush pointer changes when a parameter is changed, so that the user can intuitively recognize the brush pointer. However, some of the retouch functions may not require parameter setting of such a brush pointer, in which case a generic brush pointer (e.g., the mouse pointer of the prosthesis design module 202) may be displayed.

For example, referring to FIG. 10A, the application strength of the brush pointer B may be stronger or weaker with respect to user input, and such a change in intensity may be caused by a change in color of the brush pointer B. FIG. For example, the user can select a strength parameter change input of the brush pointer B by keyboard input (e.g., Ctrl + Right), and then adjust the intensity of the brush pointer B through dragging or wheel input with the mouse, The brush pointer B can be displayed in a weakly blue color with increasing intensity, and gradually with a higher color saturation.

Referring to FIG. 10B, the application area of the brush pointer B may be widened or narrowed to the user input, and such an area change may be represented by a change in the size of the brush pointer B. For example, the user can adjust the application area of the brush pointer B through the right drag input of the mouse, and adjust the size of the brush pointer B to correspond to the application area.

When the parameter setting of the brush pointer B is completed, the prosthetic design module 202 can modify the virtual prosthesis 90 in accordance with the operation of the brush pointer B of the user. (S203) The prosthetic design module 202 can display the virtual prosthesis 90 in a real-time manner in accordance with the correction input. (S204)

Such a retouch function can be provided as an interface optimized for the purpose of each retouch function.

11, the user selects a smooth function among the retouch functions, sets an application area and a smoothness intensity of the brush pointer B, and then displays the virtual restorations (FIG. 11) in the application area of the brush pointer B 90 can be changed smoothly according to the smoothness strength. In other words, the user can modify the virtual prosthesis 90 quickly and precisely by utilizing the smoothing function while adjusting the application area and strength of the brush pointer (B).

Next, referring to FIG. 12, the user selects an add-on function of the retouch function, sets the applied area of the brush pointer B, the ed-on strength, and then sets the brush pointer B On the surface of the virtual prosthesis 90 in the application region of the protruding portion 90. [ For example, if the ed-on strength of the brush pointer B is negative, a recess is created in the area of the virtual prosthesis 90 in the brush pointer B, and if the ed-on strength of the brush pointer B is positive, A convex portion can be created in the region of the virtual prosthesis 90 in the region B of FIG.

This enables the user to modify the virtual prosthesis 90 quickly and precisely by utilizing the Ed-on function while adjusting the application area and intensity of the brush pointer (B).

Next, referring to FIG. 13, the user selects a groove function of the retouch function, sets the application region 1 of the brush pointer B, the groove strength, and then sets the application region of the brush pointer B the groove G can be created on the surface of the virtual prosthesis 90 in the lattice according to the groove strength. Here, the application area 1 of the brush pointer B means the selected area 1 by dragging the brush pointer B by the user.

 For example, the user can form a line of constant width (corresponding to the application area of the brush pointer B) with a brush pointer, and a groove can be formed in such a line at a depth corresponding to the groove strength. In this manner, the user can quickly and precisely modify the virtual prosthesis 90 by utilizing the groove function while adjusting the application area and intensity of the brush pointer B.

14, the user selects the grab function among the retouch functions, sets the application area of the brush pointer B, and then sets the virtual rest 90 in the application area of the brush pointer B, Can be pulled or pushed in according to the grip strength.

 For example, when the user designates the first grap point g1 as the center of the brush pointer and then drags the grap point toward the outside of the virtual prosthesis 90, the virtual prosthesis 90 The shape of the virtual prosthesis 90 can be changed. In this manner, the user can quickly and precisely modify the virtual prosthesis 90 by utilizing the grab function while adjusting the application area of the brush pointer (B).

15, the user can change the scale of the virtual prosthesis 90 by selecting the scale adjustment function among the retouch functions, and inputting the scale adjustment direction ST and the scale adjustment strength. At this time, the scale adjusting function may be used to adjust the scale of the virtual prosthesis 90, the scale (Buccal / Lingual, B / L) and the Distal / Mesial direction . That is, the user can change the size of the virtual prosthesis 90 by selecting the scale adjusting function, determining the scale adjusting direction ST, and then inputting the amount of scale adjustment. However, depending on the size change of the virtual prosthesis 90, the end line of the virtual prosthesis may deviate from the margin line ML.

16, the user can change the position of the virtual prosthesis 90 by selecting the position shift function among the retouch functions and inputting the position shift position. For example, the position shifting function may be a function of selecting and dragging the virtual prosthesis 90 and moving it to a desired position. However, depending on the positional change of the virtual prosthesis 90, the end line of the virtual prosthesis may deviate from the margin line ML.

17, the user can select the rotation function among the retouch functions and rotate the virtual prosthesis 90 by inputting the rotational direction at the reference position and the reference position. For example, the rotate function may be a function of selecting a position of the virtual prosthesis 90 and rotating the virtual prosthesis 90 in a dragging direction with respect to the position. However, depending on the rotation of the virtual prosthesis 90, the end line of the virtual prosthesis may deviate from the margin line ML.

However, the end line of the virtual prosthesis 90 may deviate from the margin line ML when the retouch function such as the position movement function, the rotation function, or the scale adjustment function is applied.

At this time, the shape of the virtual prosthesis 90 may be changed by the retouch function so that the end line of the virtual prosthesis 90 may be corrected to coincide with the margin line ML, but this can be time-consuming and troublesome.

The prosthetic design module 202 can further provide a fitting function of changing the shape of the virtual prosthesis 90 such that the end line and the margin line ML of the virtual prosthesis 90 coincide with each other. (S205)

The prosthetic design module 202 is configured to fix the circumference of the virtual prosthesis 90 and then extend the virtual prosthesis 90 so that the end line of the virtual prosthesis 90 coincides with the margin line ML Or shortened.

18, when the user selects the fitting function, the fitting function enlarges the side of the virtual prosthesis 90 from the center circumference CL, which is the outermost of the virtual prosthesis 90, to the margin line ML The virtual prosthesis 90 may be modified so that the end line 11 and the margin line ML of the virtual prosthesis 90 coincide with each other. Such a fitting function automatically changes the position, orientation, and / or appearance of the desired virtual prosthesis 90 through the various retouch functions and then automatically aligns the margin line ML and the end line 11, The speed of operation can be improved.

On the other hand, the prosthetic design module 202 can display the state of the virtual prosthesis 90 and assist the retouch function. (S206)

19, the prosthetic design module 202 measures the thickness d3 of the virtual prosthesis 90 at the point P3 when the user selects one point P3 through the pointer , The virtual prosthesis 90 can be overlapped and displayed.

More specifically, the distance from the selected point P3 to the oral cavity by the user is displayed as the thickness d3, and the numerical value d3 of the distance can be further displayed. For example, the thickness d3 may mean a straight line distance from the selected point P3 on the outer surface of the virtual prosthesis to the inner surface of the virtual prosthesis.

Through this status display function, the user can check the thickness d3 of the virtual prosthesis 90 in real time and utilize the retouch function.

20, the prosthodontic design module 202, when a portion 311 having a thickness thinner than a preset minimum thickness of the prosthesis is detected through the retouch function, the portion is referred to as a warning region 311 Can be displayed. At this time, the warning area 311 is displayed in a color different from that of the remaining virtual prosthesis 90, and can be recognized by the user. With this status display function, the user can check the minimum limit thickness of the virtual prosthesis 90 in real time and utilize the retouch function.

21, when the user selects the fourth point P4 and the fifth point P5, the prosthesis design module 202 determines the distance between the fourth point P4 and the fifth point P5 a distance display function for displaying the calculated numerical value after calculating the distance d10 can be provided.

Thus, the prosthodontic design module 202 provides various retouch functions and provides an optimized interface for each purpose of the retouch function, so that even a novice user can intuitively modify the virtual prosthesis 90 in a desired direction. In addition, the prosthetic design module 202 may provide a fitting function to automatically align the end line 11 of the virtual prosthesis 90 with the margin line ML, thereby minimizing unnecessary work. In addition, the prosthetic design module 202 can display the state of the virtual prosthesis 90 according to the retouch function according to the situation or user's selection, and assist the user in utilizing the retouch function.

The embodiments of the present invention described above can be implemented in the form of program instructions that can be executed through various computer components and recorded in a computer-readable recording medium. The computer-readable recording medium may include program commands, data files, data structures, and the like, alone or in combination. The program instructions recorded on the computer-readable recording medium may be those specifically designed and configured for the present invention or may be those known and used by those skilled in the computer software arts. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape, optical recording media such as CD-ROM and DVD, 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 machine language code, such as those generated by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware device may be modified into one or more software modules for performing the processing according to the present invention, and vice versa.

The specific acts described in the present invention are, by way of example, not intended to limit the scope of the invention in any way. For brevity of description, descriptions of conventional electronic configurations, control systems, software, and other functional aspects of such systems may be omitted. Also, the connections or connecting members of the lines between the components shown in the figures are illustrative of functional connections and / or physical or circuit connections, which may be replaced or additionally provided by a variety of functional connections, physical Connection, or circuit connections. Also, unless stated otherwise such as " essential ", " importantly ", etc., it may not be a necessary component for application of the present invention.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. 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 (18)

Displaying a three-dimensional oral model;
Designing an virtual prosthesis based on the three-dimensional oral model;
Displaying the virtual prosthesis on the three-dimensional oral model;
Providing a retouch interface for modifying an virtual prosthesis on the three-dimensional oral model; And
And displaying the deformed virtual prosthesis as the retouch function is performed,
Wherein designing the virtual prosthesis comprises: determining a shape of the virtual prosthesis by setting a prosthesis parameter of the virtual prosthesis; and determining a scale of the virtual prosthesis of the shape,
Wherein the step of determining the scale of the virtual prosthesis comprises the steps of determining a predetermined length in accordance with a user's input within the three-dimensional oral model, and determining the size of the virtual prosthesis corresponding to the predetermined length and,
Wherein the step of displaying the virtual prosthesis on the three-dimensional oral model comprises the steps of: determining, based on the specific point of the restoration area included in the prosthesis parameter, the insertion axis direction and the tooth alignment direction and the direction of the line segment specifying the predetermined length, Placing the prosthesis on the three-dimensional oral model
Virtual prosthesis design method. delete delete delete Displaying a three-dimensional oral model;
Designing an virtual prosthesis based on the three-dimensional oral model;
Displaying the virtual prosthesis on the three-dimensional oral model;
Providing a retouch interface for modifying an virtual prosthesis on the three-dimensional oral model; And
And displaying the deformed virtual prosthesis as the retouch function is performed,
Wherein providing a retouch interface for modifying the virtual prosthesis comprises: selecting a retouch function; Setting a parameter of a brush pointer to which the selected retouch function is to be applied; And modifying the virtual prosthesis according to user input through the brush pointer
Virtual prosthesis design method. 6. The method of claim 5,
Wherein the parameters of the brush pointer include:
An application area of the brush pointer,
The size of the brush pointer changes corresponding to the size of the application area of the brush pointer
Virtual prosthesis design method. 6. The method of claim 5,
Wherein the parameters of the brush pointer include:
And an application strength of the retouch function,
The color of the brush pointer changes corresponding to the application strength of the retouch function
Virtual prosthesis design method. 6. The method of claim 5,
Wherein providing a retouch interface to modify the virtual prosthesis comprises:
Selecting a smooth function among the retouch functions;
Setting an application area or smoothness intensity of the brush pointer;
And smoothly changing the surface of the virtual prosthesis within the application area of the brush pointer according to the smoothed intensity
Virtual prosthesis design method. 6. The method of claim 5,
Wherein providing a retouch interface to modify the virtual prosthesis comprises:
Selecting an add-on function among the retouch functions;
Setting an application area or an ed-on strength of the brush pointer;
And generating concave-convex portions on the surface of the virtual prosthesis in the application region of the brush pointer according to the Ed-on strength
Virtual prosthesis design method. 6. The method of claim 5,
Wherein providing a retouch interface to modify the virtual prosthesis comprises:
Selecting a groove function among the retouch functions;
Setting an application region or a groove strength of the brush pointer;
And creating a groove in the surface of the virtual prosthesis in the application area of the brush pointer according to the groove strength
Virtual prosthesis design method. 6. The method of claim 5,
Wherein providing a retouch interface to modify the virtual prosthesis comprises:
Selecting a grab function among the retouch functions;
And pulling or pushing the surface of the virtual prosthesis in the application area of the brush pointer according to the grab strength
Virtual prosthesis design method. 6. The method of claim 5,
Wherein providing a retouch interface to modify the virtual prosthesis comprises:
Selecting a scale adjustment function among the retouch functions,
And changing the scale of the virtual prosthesis by inputting the scale adjustment direction and the scale adjustment strength
Virtual prosthesis design method. 6. The method of claim 5,
Wherein providing a retouch interface to modify the virtual prosthesis comprises:
Selecting a position shift function among the retouch functions;
And changing the position of the virtual prosthesis by inputting the position movement position
Virtual prosthesis design method. 6. The method of claim 5,
Wherein providing a retouch interface to modify the virtual prosthesis comprises:
Selecting a rotation function among the retouch functions,
Receiving a reference position and a rotational direction at the reference position in the virtual prosthesis;
Rotating the virtual prosthesis according to the input of the reference position and the rotational direction
Virtual prosthesis design method. 15. The method according to one of claims 12 to 14,
Leaving an end line of the virtual prosthesis out of a margin line of the three-dimensional oral model;
Providing a fitting function to automatically match the end line of the virtual prosthesis to the margin line
Virtual prosthesis design method. 16. The method of claim 15,
Wherein providing the fitting function comprises:
Extending the virtual prosthesis so that the end line of the virtual prosthesis is aligned with the margin line around the center of the virtual prosthesis after the center of the virtual prosthesis is fixed
Virtual prosthesis design method. Displaying a three-dimensional oral model;
Designing an virtual prosthesis based on the three-dimensional oral model;
Displaying the virtual prosthesis on the three-dimensional oral model;
Providing a retouch interface for modifying an virtual prosthesis on the three-dimensional oral model; And
And displaying the deformed virtual prosthesis as the retouch function is performed,
Further comprising the step of displaying a status of the virtual prosthesis,
Wherein the step of displaying the state of the virtual prosthesis comprises the steps of: selecting a predetermined point in accordance with a user's input; calculating a minimum thickness of the virtual prosthesis at the predetermined point; Lt; RTI ID = 0.0 >
Virtual prosthesis design method. 18. The method of claim 17,
The method of claim 1, further comprising displaying a state of the virtual prosthesis, wherein the step of displaying the state of the virtual prosthesis comprises: if a thinner portion of the virtual prosthesis is thinner than a predetermined minimum thickness, And displaying the portion as a warning area
Virtual prosthesis design method.

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