KR102474298B1 - Method for designing prosthetic model and apparatus thereof - Google Patents

Abstract

A prosthesis model design method and apparatus are disclosed. In the method of designing a prosthesis model according to an embodiment, when a preset minimum thickness of a prosthesis cannot be secured, a guide for designing a normal prosthesis can be presented to the user by dividing and displaying areas of insufficient thickness.

Description

Method for designing prosthetic model and apparatus thereof

The present invention relates to a dental image processing technology, and more particularly, to a technology for designing a prosthesis from a dental image.

BACKGROUND OF THE INVENTION In the field of dentistry, a prosthetic procedure refers to restoring a damaged tooth using a prosthesis. Prosthetics include crowns, inlays, onlays, copings, pontics, and the like. Before performing an actual prosthesis procedure, a process of selecting a virtual prosthesis model suitable for a patient through simulation and virtually arranging the prosthesis model at a target location is performed. This process is done through prosthetic design.

In the case of prosthesis design software such as prosthetic CAD, the external shape is designed outside the minimum thickness range required for prosthetics. However, since the distance between the abutment tooth and the antagonist is narrow (for example, when the antagonist invades inside the minimum thickness range), the user (for example, prosthetic manufacturer) may excessively invade the outer shape of the prosthesis to the antagonist, resulting in damage to the prosthesis. This has been solved only by securing the minimum thickness of At this time, in order to try on the printed prosthesis in the oral cavity, additional removal of the antagonist teeth is unavoidable, which affects the oral condition of the patient.

When manufacturing prosthesis through manual work rather than CAD, errors may occur because it depends on the user's experience and visual judgment.

According to an embodiment, a prosthesis model design method and apparatus capable of distinguishing and displaying a prosthesis and guiding a solution when a prosthesis cannot secure a minimum thickness when designing a prosthesis are proposed.

A method for designing a prosthesis model according to an embodiment includes the steps of designing the outer and inner surfaces of the prosthesis model by the prosthesis model design device, the steps of checking the thickness of the designed prosthesis, and determining whether the thickness of the prosthesis is less than a preset minimum thickness of the prosthesis. and determining whether or not the insufficient thickness region occurs according to the determination result, and displaying the insufficient thickness region as identifiable visual information.

The step of classifying and displaying the insufficient thickness region as identifiable visual information includes, when the minimum thickness model of the prosthesis invades the opposing tooth model, the step of generating an insufficient thickness region where the minimum thickness model of the prosthesis and the opposing tooth model overlap, and A step of dividing and displaying the insufficient thickness area with identifiable visual information may be included.

The step of classifying and displaying the insufficient thickness area with identifiable visual information includes: adapting the prosthetic minimum thickness model to the outer surface model of the prosthesis, moving the adapted prosthesis model in the opposite direction of the opposing tooth, and moving Step of adapting the inner prosthesis model to correspond to one prosthesis model, and when the adapted inner surface model of the prosthesis invades the abutment tooth model, distinguishing and displaying the invaded area where the adapted inner surface model and the abutment model overlap with identifiable visual information steps may be included.

The step of classifying and displaying the insufficient thickness region with identifiable visual information includes generating a new prosthetic outer surface model by merging the minimum thickness model of the prosthesis and the outer surface model of the prosthesis when the model of the minimum thickness of the prosthesis invades the outer surface model of the prosthesis; When the new prosthetic outer surface model invades the antagonist tooth model, a step of dividing and displaying the invaded area where the new prosthetic outer surface model and the antagonistic tooth model overlap with identifiable visual information may be included.

The method of designing the prosthetic appliance model further includes providing an abutment tooth removal user interface, and expanding the inner model of the prosthetic appliance by deleting the abutment tooth model in the corresponding area when the user selects the abutment tooth removal user interface by user manipulation. can do.

The method of designing the prosthesis model may further include providing a user interface for deleting the opposing tooth, and processing the deletion of the “opposite tooth” model in the corresponding region when selecting the “antagonist tooth” deletion user interface by user manipulation.

An apparatus for designing a prosthesis according to another embodiment includes a control unit that designs a prosthesis model and checks the thickness of the designed prosthesis to determine whether the thickness of the prosthesis is less than a preset minimum thickness of the prosthesis; It includes an output unit that divides and displays identifiable visual information.

When the minimum prosthetic thickness model invades the opposing tooth model, the control unit creates an insufficient thickness region where the minimum prosthetic thickness model and the opposing tooth model overlap, and divides and displays the generated insufficient thickness region as identifiable visual information through the output unit. can do.

The control unit adapts the minimum thickness model of the prosthesis to the outer surface model of the prosthesis, moves the adapted prosthesis model in the opposite direction of the opposing tooth, adapts the inner model of the prosthesis to correspond to the moved prosthesis model, and adjusts the adapted inner surface model of the prosthesis to the abutment tooth. When the model is invaded, the invaded area where the adapted prosthetic inner surface model and the abutment model overlap can be distinguished and displayed as identifiable visual information through the output unit.

The control unit generates a new prosthetic outer surface model by merging the minimum prosthesis thickness model and the prosthetic outer surface model when the prosthetic minimum thickness model invades the prosthetic outer surface model, and when the new prosthesis outer surface model invades the antagonist tooth model, the new prosthesis The invasion area where the outer model and the antagonist model overlap can be displayed by dividing it into identifiable visual information through the output unit.

The output unit may provide an abutment tooth removal user interface, and the control unit may extend the inner surface model of the prosthetic appliance by deleting the abutment tooth model of the corresponding region when the control unit receives a selection input from the abutment tooth removal user interface by user manipulation.

The output unit may provide an antagonist deletion user interface, and the control unit may delete the antagonist model of the corresponding region upon receiving a selection input of the antagonist deletion user interface by user manipulation.

According to the prosthetic model design method and device according to an embodiment, when the prosthesis cannot secure the minimum thickness of the prosthesis due to the lack of abutment teeth, the amount of prep, or the crystallization of the antagonist, the software classifies the insufficient thickness area in the prosthetic cross-sectional image, As indicated, a guide for designing a normal prosthesis can be presented to the user (surgeon).

In the current situation where it is difficult to manufacture a normal prosthetic appliance, it is possible to provide a function that allows the user to execute a solution (for example, removal of an abutment tooth or removal of an opposing tooth) through a simple operation. It is possible to easily secure the minimum prosthesis thickness without depending on the user's experience and knowledge.

Through the abutment preparation function, it is possible to solve the lack of thickness while maintaining the normal external shape of the prosthesis. Through the antagonist tooth removal function, unnecessary antagonist tooth removal can be minimized by serving as a removal guide for additional antagonist tooth removal when a prosthesis is tried on later.

1 is a diagram showing the configuration of a prosthesis design device according to an embodiment of the present invention;
2 is a diagram showing the flow of a method for designing a prosthesis model according to an embodiment of the present invention;
3 is a view showing a cross-sectional image of a prosthesis that solves the problem of lack of thickness of a prosthesis model through abutment tooth removal according to an embodiment of the present invention;
4 is a view showing a cross-sectional image of a prosthesis that solves the problem of insufficient thickness of a prosthesis model through deletion of antagonist teeth according to an embodiment of the present invention;
5 is a view showing a cross-sectional image of a prosthesis for checking whether or not the prosthesis minimum thickness model invades an opposing tooth according to an embodiment of the present invention;
6 is a view showing a cross-sectional image of a prosthesis in which an insufficient thickness region occurs due to the minimum thickness model of the prosthesis invading the antagonist tooth according to an embodiment of the present invention;
FIG. 7 is a cross-sectional image of a prosthesis showing a procedure of adapting a prosthetic minimum thickness model to an outer surface model of the prosthesis according to an embodiment of the present invention.
8 is a cross-sectional image of a prosthesis showing a procedure for adapting an inner surface model of a prosthesis as much as an adapted outer surface model of the prosthesis according to an embodiment of the present invention;
9 is a diagram showing an example of generating a region invading an abutment model by an adapted inner surface model of a prosthesis according to an embodiment of the present invention;
10 is a view showing a cross-sectional image of a prosthesis in which a new prosthetic outer surface model is created by merging a prosthesis minimum thickness model and a prosthetic outer surface model according to an embodiment of the present invention;
FIG. 11 is a view showing a cross-sectional image of a prosthesis in which an invaded region generated when an outer surface model of a new prosthesis invades an opposing tooth model according to an embodiment of the present invention is divided into identifiable visual information and displayed.

Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms, but only the present embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention belongs It is provided to fully inform the holder of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification.

In describing the embodiments of the present invention, if it is determined that a detailed description of a known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted, and the terms described later will be used in the embodiments of the present invention. These terms are defined in consideration of the functions of and may vary depending on the user's or operator's intention or custom. Therefore, the definition should be made based on the contents throughout this specification.

Combinations of each block of the accompanying block diagram and each step of the flowchart may be executed by computer program instructions (execution engine), and these computer program instructions are executed by a processor of a general-purpose computer, special-purpose computer, or other programmable data processing device. Since it can be mounted, the instructions executed through the processor of a computer or other programmable data processing device create means for performing the functions described in each block of the block diagram or each step of the flowchart.

These computer program instructions may also be stored in a computer usable or computer readable memory that can be directed to a computer or other programmable data processing device to implement functionality in a particular way, such that the computer usable or computer readable memory The instructions stored in are also capable of producing an article of manufacture containing instruction means for performing the functions described in each block of the block diagram or each step of the flow chart.

And since the computer program instructions can also be loaded on a computer or other programmable data processing device, a series of operational steps are performed on the computer or other programmable data processing device to create a computer-executed process to create a computer or other programmable data processing device. It is also possible that the instructions for performing the data processing apparatus provide steps for executing the functions described in each block of the block diagram and each step of the flowchart.

In addition, each block or each step may represent a module, segment, or portion of code that includes one or more executable instructions for executing specified logical functions, and in some alternative embodiments may refer to blocks or steps. It should be noted that it is also possible for functions to occur out of order. For example, two blocks or steps shown in succession may in fact be performed substantially concurrently, or the blocks or steps may be performed in the reverse order of their corresponding functions, if necessary.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the embodiments of the present invention exemplified below may be modified in many different forms, and the scope of the present invention is not limited to the embodiments described below. The embodiments of the present invention are provided to more completely explain the present invention to those skilled in the art.

1 is a diagram showing the configuration of a prosthesis designing device according to an embodiment of the present invention.

Referring to FIG. 1 , a prosthesis design device 1 performs a CAD process to help dental prosthesis in an actual dentistry. The prosthetic CAD process refers to a series of processes in which data of a patient's teeth is acquired, a virtual prosthetic model is called from a library under control by a computer program, and then virtually placed in a target position of the tooth data. Tooth data is data having 2D and 3D information of teeth including a damaged target tooth. The target position is the target tooth position

The prosthesis design device 1 is an electronic device capable of executing dental software such as prosthesis design software. Electronic devices include computers, notebook computers, laptop computers, tablet PCs, smart phones, mobile phones, personal media players (PMPs), personal digital assistants (PDAs), and the like. Dental software includes prosthesis design software, guide programs, scan programs, medical image processing programs, and the like. In addition, it can be applied to other general medical software other than dental prosthetic surgery.

Referring to FIG. 1 , an apparatus 1 for designing a prosthesis according to an exemplary embodiment includes a data acquisition unit 10 , a storage unit 12 , a control unit 14 , an input unit 16 , and an output unit 18 .

The data acquisition unit 10 acquires image data from the patient. Image data necessary for prosthetic surgery includes CT data and oral model data. The data acquisition unit 10 may execute CT data and oral model data in software or load data stored in a web page or server.

Oral model data is data having information on actual teeth including damaged teeth. Oral model data may be obtained by scanning a plaster model created by imitating the patient's oral cavity with a 3D scanner. As another example, it may be obtained by scanning the inside of the oral cavity of the patient using a 3D intra-oral scanner. The obtained oral model data may be stored in the storage unit 12 .

The storage unit 12 stores various types of data, such as information necessary for the operation of the prosthesis design device 1 and information generated according to the operation. In the storage unit 12 according to an embodiment, oral model data and CT data of an individual patient are stored, and a user requests oral model data and CT data of a specific patient among all oral model data and CT data during dental treatment simulation. It can be provided to the control unit 14 according to. At this time, the storage unit 12 stores the image of the upper teeth and the lower teeth of each patient, and the images of the upper teeth and the lower teeth matched to the oral model data and CT data of the specific patient are stored at the user's request. It can be provided to the control unit 14 according to. In addition, the storage unit 12 may have a prosthetic library composed of a plurality of prosthetic appliance model data and provide the prosthetic library to the control unit 14 . In the storage unit 12 according to an embodiment, information about a prosthesis minimum thickness model for each material used as the prosthesis may be stored.

The controller 14 controls each component while establishing a prosthetic surgery plan through control by computer software. The control unit 14 manages screen information displayed on the screen through the output unit 18 and performs a simulation of implanting a virtual prosthetic appliance model in a dental image. A dental image in which a virtual object is placed refers to a multi-dimensional image, such as a two-dimensional or three-dimensional image, showing an arrangement of a patient's teeth, which is generated for establishing a prosthetic surgery plan. Various types of images, such as X-ray, CT, panoramic images, intraoral scan images, images generated through reconstruction, and images obtained by combining multiple images, can be used for prosthetic surgery planning.

When designing the prosthesis model, the control unit 14 divides and displays areas of insufficient thickness on the cross-sectional image of the prosthesis through the output unit 18 when the minimum thickness of the prosthesis required by the prosthesis cannot be secured.

For example, the controller 14 designs the outer and inner surfaces of the prosthesis model, checks the thickness of the designed prosthesis, and determines whether the thickness of the prosthesis is less than a preset minimum thickness of the prosthesis. At this time, when an insufficient thickness region occurs, the insufficient thickness region is divided into identifiable visual information through the output unit 18 and displayed. Examples of classifying visual information include methods of differentiating color, shape, shape, size, arrangement, and the like.

When the minimum prosthesis thickness model invades the opposing tooth model, the controller 14 may create a thickness insufficient region where the minimum thickness model of the prosthesis and the opposing tooth model overlap. In addition, the generated insufficient thickness area may be divided into identifiable visual information through the output unit 18 and displayed. An embodiment for this will be described later with reference to FIGS. 5 and 6 .

Furthermore, the control unit 14 adapts the minimum thickness model of the prosthesis to the outer surface model of the prosthesis, moves the adapted prosthesis model in the opposite direction to the opposing tooth, and adapts the inner surface model of the prosthesis to correspond to the moved prosthesis model. In this case, when the adapted inner surface model of the prosthesis invades the abutment model, the invasion area where the adapted inner surface model of the prosthesis and the abutment model overlap may be divided into identifiable visual information through the output unit 18 and displayed. An embodiment for this will be described later with reference to FIGS. 7 to 9 .

When the minimum thickness model of the prosthesis invades the outer surface model of the prosthesis, the controller 14 may generate a new outer surface model of the prosthesis by merging the minimum thickness model of the prosthesis and the outer surface model of the prosthesis. Subsequently, when the outer surface model of the new prosthesis invades the opposing tooth model, the invaded area where the outer surface model of the new prosthesis and the opposing tooth model overlap may be distinguished and displayed as identifiable visual information through the output unit 18 . An embodiment for this will be described later with reference to FIGS. 10 and 11 .

The controller 14 may present a guide for designing a normal prosthesis to the user (surgeon). For example, in a situation where it is difficult to manufacture a normal prosthetic appliance, it is possible to provide the user with a function to execute a solution such as abutment tooth deletion or antagonist tooth deletion through a simple operation. Accordingly, it is possible to easily secure the minimum thickness of the prosthesis without depending on the user's experience and knowledge.

For example, the output unit 18 provides an abutment tooth deletion user interface, and the control unit 14 receives a selection of the abutment tooth deletion user interface by user manipulation through the input unit 16, and deletes the abutment model of the corresponding area. As it is processed, the prosthesis inner model can be expanded. Through the abutment preparation function, it is possible to solve the lack of thickness while maintaining the normal external shape of the prosthesis. An embodiment for this will be described later with reference to FIG. 3 .

As another example, the output unit 18 provides a user interface for deleting antagonists, and the control unit 14, upon receiving a selection input of the user interface for deleting antagonists through the input unit 16, the controller 14 selects and inputs the antagonistic tooth model of the corresponding area. can be deleted. Through the antagonist tooth removal function, unnecessary antagonist tooth removal can be minimized by serving as a removal guide for additional antagonist tooth removal when a prosthesis is tried on later. An embodiment for this will be described later with reference to FIG. 4 .

The input unit 16 receives a user manipulation signal. For example, a user manipulation signal for deleting an abutment tooth and a user manipulation signal for deleting an opposing tooth are input. To this end, the output unit 18 may display the abutment tooth deletion user interface or the opposing tooth deletion user interface on the screen, and the input unit 16 may receive a manipulation signal (eg, click) for the user interface from the user. .

2 is a diagram illustrating the flow of a method for designing a prosthesis model according to an embodiment of the present invention.

Referring to FIG. 2 , the software creates a prosthesis model (S210) and then designs the outer and inner surfaces of the prosthesis model (S220). For example, an abutment tooth margin line is created and an inner surface model of the prosthesis is created according to a preset “cement gap” value. Next, a tooth template model is placed on the abutment tooth, and the size of the template model is adjusted according to the adjacent teeth and antagonist teeth to create an outer surface model of the prosthesis. Subsequently, the generated inner surface model of the prosthesis and the outer surface model of the prosthesis are merged according to the margin line.

Subsequently, the software checks the thickness of the prosthesis model (S230). For example, the thickness may be confirmed by calculating the distance between the inner surface model of the prosthesis and the outer surface model of the prosthesis. At this time, the software determines whether the thickness of the prosthesis model is less than the minimum thickness of the prosthesis model (S240). The prosthesis minimum thickness model may be set in advance according to the material of the prosthesis and may be changed. The prosthesis minimum thickness model is a model having a preset minimum distance between the inner model and the outer model of the prosthesis, and the prosthesis model must be able to secure the minimum thickness of the prosthesis.

According to the result of the determination (S240), when an area of insufficient thickness occurs, the software classifies and displays the insufficient thickness area as identifiable visual information through a cross-sectional image of the corresponding area (S250). Examples of classifying visual information include methods of differentiating color, shape, shape, size, arrangement, and the like.

Subsequently, as one of the methods for solving the problem of insufficient thickness of the prosthesis model, the software provides a user with an abutment deletion user interface, and upon receiving a selection input (S261) of the abutment deletion user interface by user manipulation, the abutment in the corresponding area The model is deleted (S271). Accordingly, the problem of lack of thickness can be solved by extending the inner surface model of the prosthetic appliance corresponding to the deleted area (S281).

As another method for solving the problem of insufficient thickness of the prosthesis model, the software provides the user with an opposing tooth deletion user interface, and upon receiving an input (S262) to select the opposite tooth deletion user interface by user manipulation, the corresponding area The opposite value = model is deleted (S272). Accordingly, it is possible to solve the problem of lack of thickness by supporting to maintain the outer surface model of the prosthetic appliance corresponding to the removal area (S282).

With reference to FIGS. 3 to 11 , a method of displaying a corresponding region when the thickness of the prosthesis model is insufficient and methods for solving the problem of insufficient thickness will be described later. Here, the prosthesis includes a crown, an inlay, an onlay, a coping, a pontic, and the like. In the drawings to be described later, the crown is shown as an example, but is not limited thereto. .

FIG. 3 is a view showing a cross-sectional image of a prosthesis that solves the problem of lack of thickness of a prosthesis model through preparation of abutments according to an embodiment of the present invention.

Referring to FIG. 3 , when the prosthesis model 300 invades the abutment model 310, the software classifies and displays the invaded area 330 as identifiable visual information. At this time, when the user selects (eg, clicks) the invasion area 330, the shape of the abutment model 300 is modified (deleting the abutment model) so that the prosthesis model 300 can secure the minimum thickness. .

FIG. 4 is a view showing a cross-sectional image of a prosthesis that solves the problem of lack of thickness of a prosthetic appliance model through deletion of antagonist teeth according to an embodiment of the present invention.

Referring to FIG. 4 , when the prosthetic appliance model 300 invades the opposing model 400, the software classifies and displays the invaded region 410 as identifiable visual information. At this time, when the user selects (eg, clicks) the invasion area 410, the shape of the antagonist model 420 is modified (the antagonist model is deleted), so that the prosthesis model 300 can secure the minimum thickness. let it be

5 is a view showing a cross-sectional image of a prosthesis for checking whether or not the minimum prosthetic thickness model according to an embodiment of the present invention invades an opposing tooth.

Referring to FIG. 5 , a cross-sectional image of the prosthesis includes an opposing tooth model 510, an outer surface model 520 of the prosthesis, a minimum thickness model of the prosthesis 530, an inner surface of the prosthesis model 540, and a prepared tooth model 550. Reference numeral 500 in FIG. 5 shows that at least a part of the prosthesis minimum thickness model 530 invades the opposing tooth model 510 .

FIG. 6 is a view showing a cross-sectional image of a prosthesis in which an insufficient thickness region occurs when the minimum thickness model of a prosthesis invades an opposing tooth according to an embodiment of the present invention.

Referring to FIG. 6 , as the prosthetic minimum thickness model 530 invades the opposing tooth model 510 , a thickness insufficient region 560 occurs. Here, the insufficient thickness area 560 corresponds to an area where the prosthesis minimum thickness model 530 and the opposing teeth model 510 overlap. The software may classify and display the insufficient thickness area 560 as identifiable visual information.

7 is a view showing a cross-sectional image of a prosthesis showing a procedure for adapting a prosthetic minimum thickness model to an outer surface model of the prosthesis according to an embodiment of the present invention.

Referring to FIG. 7 , the software adapts the prosthetic minimum thickness model 530 to the prosthetic outer surface model 520 . The adapted model is shown as a line surrounded by green at reference numeral 570.

8 is a view showing a cross-sectional image of a prosthesis showing a procedure for adapting an inner surface model of a prosthesis as much as an adapted outer surface model of the prosthesis according to an embodiment of the present invention.

Referring to FIG. 8 , the software adapts the prosthetic inner surface model 540 by the adapted prosthesis model 570 . To this end, the adapted prosthesis model (570 in FIG. 7) is moved in the opposite direction of the opposing tooth (570->570'). For example, when the antagonist teeth correspond to the posterior teeth or the lower anterior teeth, the prosthesis model may be vertically moved in the direction opposite to the antagonist teeth based on the occlusal plane. In addition, when the antagonist corresponds to the upper anterior tooth, the opposite direction of the antagonist for moving the prosthesis model may be a vertical direction from the tooth axis of the abutment model to the labial side. A model obtained by moving the adapted prosthetic appliance model (570 in FIG. 7) along the y-axis is the same as the green line of reference numeral 570'.

The software then adapts the prosthetic inner surface model 540 to correspond to the displaced prosthesis model 570'. For example, a predetermined criterion for adapting the prosthetic inner surface model as much as the moved prosthesis model, or making the abutment reduction amount minimal while the moved prosthesis model meets the minimum thickness, or the shape of the abutment so that it is not difficult to actually prepare The model of the inner surface of the prosthesis can be adapted so that it has a shape that meets certain criteria. The adapted inner prosthetic model is indicated by the orange line at 580 .

9 is a diagram illustrating an example of generating a region invading an abutment model by an adapted inner surface model of a prosthesis according to an embodiment of the present invention.

Referring to FIG. 9 , when the adapted inner surface model 580 of the prosthesis invades the abutment model 550, an invasion region 590 is generated, and the software divides the invasion region 590 into identifiable visual information and displays the invasion region 590. do. In FIG. 9 , they are displayed by classifying them by color.

10 is a view showing a cross-sectional image of a prosthesis in which a new prosthesis outer surface model is created by merging a prosthesis minimum thickness model and a prosthetic outer surface model according to an embodiment of the present invention.

Referring to FIG. 10 , as the prosthesis minimum thickness model 530 invades the outer surface model 520 of the prosthesis, it is exposed outside the outer surface model 520 of the prosthesis. In this case, the software merges the prosthetic minimum thickness model 530 with the prosthetic exterior model 520 . In FIG. 10 , a bold blue color corresponds to the merged outer surface model 900 of the new prosthesis.

FIG. 11 is a view showing a cross-sectional image of a prosthesis in which an invaded region generated when an outer surface model of a new prosthesis invades an opposing tooth model according to an embodiment of the present invention is divided into identifiable visual information and displayed.

Referring to FIG. 11 , when the new merged prosthetic outer surface model 900 invades the antagonist model 510, the software determines the invasion area 910 where the new merged outer surface model 900 and the antagonist model 510 overlap. ) is divided into identifiable visual information and displayed. In Figure 11, it is displayed by classifying by color.

So far, the present invention has been looked at mainly by its embodiments. Those skilled in the art to which the present invention pertains will be able to understand that the present invention may be implemented in a modified form without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments should be considered from a descriptive point of view rather than a limiting point of view. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the equivalent scope will be construed as being included in the present invention.

Claims (12)

In the prosthesis model design method using the prosthesis model design device, the prosthesis model design device
Designing the outer and inner surfaces of the prosthesis model;
Checking the thickness of the designed prosthesis;
determining whether the thickness of the prosthesis is less than a preset minimum thickness of the prosthesis;
Classifying and displaying the insufficient thickness region as identifiable visual information when the insufficient thickness region occurs according to the determination result; and
displaying an abutment tooth deletion user interface or an antagonist tooth deletion user interface on a screen to change a prosthesis model so that the thickness insufficient area secures the preset minimum thickness of the prosthesis;
Prosthesis model design method comprising a. The method of claim 1, wherein the step of classifying and displaying the insufficient thickness area with identifiable visual information
if the minimum prosthesis thickness model invades the antagonist model, generating a thickness insufficient area where the minimum prosthesis thickness model and the antagonist model overlap; and
Classifying and displaying the generated insufficient thickness area with identifiable visual information;
Prosthesis model design method comprising a. The method of claim 1, wherein the step of classifying and displaying the insufficient thickness area with identifiable visual information
Adapting the prosthetic minimum thickness model to an outer surface model of the prosthesis;
moving the adapted prosthesis model in the opposite direction of the opposing tooth;
adapting an inner surface model of the prosthesis to correspond to the moved prosthetic appliance model; and
When the adapted inner surface model of the prosthesis invades the abutment tooth model, dividing and displaying the invaded area where the adapted inner surface model of the prosthesis and the abutment model overlap with identifiable visual information;
Prosthesis model design method comprising a. The method of claim 1, wherein the step of classifying and displaying the insufficient thickness area with identifiable visual information
generating a new prosthetic outer surface model by merging the minimum prosthesis thickness model and the prosthesis outer surface model when the prosthetic minimum thickness model invades the prosthetic outer surface model; and
When the new prosthetic outer surface model invades the antagonist tooth model, distinguishing and displaying the invaded area where the new prosthetic outer surface model and the antagonistic tooth model overlap with identifiable visual information;
Prosthesis model design method comprising a. The method of claim 1, wherein the prosthesis model design method is
expanding the inner surface model of the prosthetic appliance by deleting the abutment model of the corresponding region when the user interface for abutment deletion is selected through user manipulation;
Prosthesis model design method further comprising a. The method of claim 1, wherein the prosthesis model design method is
deleting the antagonist model of a corresponding region when a selection input is received through a user interface for deleting antagonist teeth by a user manipulation;
Prosthesis model design method further comprising a. a control unit that designs a prosthesis model and checks a thickness of the designed prosthesis to determine whether the thickness of the prosthesis is less than a preset minimum thickness; and
When an area of insufficient thickness occurs, an abutment tooth deletion user interface or an antagonist tooth deletion user interface is used to classify and display the insufficient thickness region with identifiable visual information and change the prosthesis model so that the thickness insufficient region secures the preset minimum thickness of the prosthesis. an output unit that displays on the screen;
Prosthesis model design device comprising a. The method of claim 7, wherein the controller
When the prosthetic minimum thickness model invades the antagonist model, an insufficient thickness area is created where the minimum prosthesis thickness model and the antagonist model overlap, and the created thickness insufficient area is classified and displayed as identifiable visual information through the output unit. A prosthetic model design device. The method of claim 7, wherein the controller
adapting the prosthesis minimum thickness model to an outer prosthetic model, moving the adapted prosthesis model in the opposite direction of the opposing tooth, and adapting the prosthetic inner surface model to correspond to the moved prosthesis model;
When the adapted inner surface model of the prosthesis invades the abutment tooth model, the prosthetic model design device is characterized in that the invasion region where the adapted inner surface model of the prosthesis and the abutment model overlap is distinguished and displayed as identifiable visual information through an output unit. The method of claim 7, wherein the controller
If the prosthetic minimum thickness model invades the prosthetic outer surface model, a new prosthesis outer surface model is generated by merging the prosthesis minimum thickness model and the prosthetic outer surface model;
A prosthetic model design device characterized in that when the new prosthetic outer surface model invades the antagonist tooth model, the invasion area where the new prosthetic outer surface model and the antagonistic tooth model overlap are distinguished and displayed as identifiable visual information through an output unit. The method of claim 7, wherein the controller
A prosthetic model design device characterized in that when a user interface for abutment deletion is selected by user manipulation, an abutment model in a corresponding region is deleted and an inner surface model of the prosthesis is expanded. The method of claim 7, wherein the controller
An apparatus for designing a prosthetic appliance model, characterized in that when a selection input is received through a user interface for deleting an opposing tooth by a user operation, an opposing tooth model in a corresponding region is deleted.

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