KR20220009148A - Method and apparatus for designing margin line of Inlay or Onlay - Google Patents

Abstract

An inlay/onlay margin line design method and a device thereof are disclosed. According to an embodiment, the inlay/onlay margin line design method generates and displays an inlay/onlay margin line for an abutment model, generates a bevel area on the generated margin line, and divides the generated bevel area into identifiable visual information to display it, thereby easily setting the margin line and increasing convenience of a user.

Description

Inlay/onlay margin line design method and device {Method and apparatus for designing margin line of Inlay or Onlay}

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

In the field of dentistry, prosthetic procedures refer to restoration of damaged teeth using prostheses. The prosthesis includes a crown, an inlay, an onlay, a coping, and a pontic. Before performing the actual prosthesis operation, a virtual prosthesis model suitable for the patient is selected through simulation, and the prosthesis model is virtually placed at the target location. This process is accomplished through prosthesis design.

In the case of general prosthesis design software, it is necessary to set the margin line of the prosthesis prior to designing the prosthesis model. In the case of prostheses such as inlays/onlays, the place where the prosthesis is needed is mainly on the occlusal surface of the posterior region. However, there is a limit to automatically creating a margin line at the height and groove of the ridge, which is the morphological characteristic of the occlusal surface. The ridge is mainly a raised part in the outer part of the tooth, and on the occlusal surface of the posterior part, there are a major ridge and a minor ridge for each cusp, and an occlusal point is created on the ridge. Groove refers to the shape of a valley between ridges and ridges. At the occlusal point on the ridge, the food broken down by chewing activity flows down the slope of the ridge into the groove, passes through the teeth, and goes through the process of being delivered to the digestive system. The first step for food intake is chewing through tooth bite.

Currently, there is no commercialized product that provides a function for automatic extraction of inlay/onlay margin lines, and more time and attention are required than when manufacturing other prosthetic cases such as crowns.

According to an embodiment, an inlay/onlay margin line design method that provides a function for easily setting an inlay/onlay margin line at the time of inlay/onlay design and provides a user interface in consideration of user convenience, and a method thereof suggest a device.

An inlay/onlay margin line design method according to an embodiment includes: obtaining an abutment model to insert an inlay/onlay model; generating and displaying an inlay/onlay margin line for the obtained abutment model; , generating a bevel area on the displayed margin line, and displaying the generated bevel area by dividing the generated bevel area into identifiable visual information.

The step of creating and displaying the inlay/onlay margin line is the step of importing the tooth model from the tooth library, overlapping the imported tooth model with the abutment model, and then creating a margin line by calculating the curvature value on the surface of the tooth model. It may include a step of displaying it.

The step of generating and displaying a margin line through calculation of the curvature value includes selecting a point where the wall, which has been removed perpendicularly from the occlusal surface to the tooth surface direction, contacts the occlusal surface with maximum curvature during tooth preparation, It may include generating and displaying a margin line while connecting the dots.

The steps of creating and displaying a margin line through calculation of the curvature value include defining the direction in which the ridge is directed based on the central fovea on the occlusal surface of the posterior part of the tooth model, and defining the direction of the groove in the same direction as the ridge. In addition, the directions of the ridges and grooves may provide directionality in order not to follow the line of the ridge or the line of the groove while the selected point is connected to the neighboring points when the margin line is generated.

In the step of generating the bevel region, a user interface for a command for generating a bevel region may be displayed on the screen together with the generated margin line, and generation of the bevel region may be started when a user command is input through a user action on the user interface.

In the step of generating the bevel region, a region of maximum curvature that is close to orthogonal to the occlusal surface of the tooth model is defined as a margin line, and a bevel region may be generated by detecting a slope connected to the defined margin line region.

The inlay/onlay margin line design method comprises the steps of displaying on the screen an outer margin line composed of the outer line of the bevel area and an inner margin line composed of the inner line of the bevel area, the outer margin line or the inner margin Among the lines, the margin line to be selected as the final margin line is set in advance and the final margin line is created using the set line, or the user is presented with both the outer margin line and the inner margin line and the selected margin line is set as the final margin line. It may further include the step of generating.

The inlay/onlay margin line design method may further include measuring a length of the generated bevel region and adding it to a margin gap distance value.

The inlay/onlay margin line design method may further include displaying an abnormal region on the displayed margin line, and selecting and correcting the displayed abnormal region.

An inlay/onlay margin line design apparatus according to another embodiment includes a data acquisition unit that acquires an abutment model to insert an inlay/onlay model, and an inlay/onlay margin line for the obtained abutment model. A control unit for generating a bevel region on the margin line, and an output unit for displaying screen information configured by the control unit, displaying the generated margin line, and dividing the generated bevel region into identifiable visual information.

The controller may generate a margin line while selecting a point at which the vertically removed wall from the occlusal to the tooth surface in the tooth surface direction during tooth preparation contacts the occlusal surface with maximum curvature, and connecting the selected point with neighboring points.

The controller may generate a margin line while selecting a point at which the vertically removed wall from the occlusal to the tooth surface in the tooth surface direction during tooth preparation contacts the occlusal surface with maximum curvature, and connecting the selected point with neighboring points.

The control unit defines the direction in which the ridge is directed with respect to the central fovea on the occlusal surface of the posterior part of the tooth model, and defines the direction of the groove in the same direction as the ridge, and the direction of the ridge and the groove is the points adjacent to the point selected when creating the margin line It can provide directionality so as not to follow the line of the ridge or the line of the groove while being connected to the ridge.

The controller may define a portion of maximum curvature that is close to orthogonal to the occlusal surface of the tooth model as a margin line and generate a bevel region by detecting a slope connected to the defined margin line portion.

The controller may measure the length of the generated bevel region and add it to the margin gap distance value.

By the inlay/onlay margin line design method and the apparatus according to an embodiment, an inlay/onlay margin line can be automatically generated and a user interface in consideration of user convenience can be provided.

When an inlay/onlay margin line is created, a bevel area is created and displayed as visual information that can be identified by the user. If there is a bevel area, it is possible to guide the user to easily create and select a margin line.

Furthermore, when generating the inlay/onlay margin line, it is possible to prevent an abnormal margin line from being generated due to the characteristics of the occlusal surface of the teeth. For example, it is possible to automatically create a margin line at the height and groove of the ridge, which is a morphological characteristic of the occlusal surface.

1 is a view showing an abutment model, an inlay/onlay model, and a margin line generated by an inlay/onlay margin line design apparatus according to an embodiment of the present invention;
2 is a view showing the configuration of an inlay / onlay margin line design apparatus according to an embodiment of the present invention;
3 is a view showing the flow of an inlay / onlay margin line design method according to an embodiment of the present invention;
4 is a view showing an image screen according to an inlay / onlay margin line generation process according to an embodiment of the present invention;
5 is a view showing an example of generating an inlay / onlay margin line according to an embodiment of the present invention;
6 is a view showing an example of generating a bevel region according to an embodiment of the present invention;
7 is a view showing an example of measuring the length of the generated bevel region according to an embodiment of the present invention and adding it to a margin gap distance value;
8 is a diagram illustrating a software screen for generating an inlay/onlay margin line and displaying a bevel area on the generated margin line according to an embodiment of the present invention.

Advantages and features of the present invention, and a method for achieving them will become apparent 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, but may be implemented in various different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention belongs It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout.

In describing the embodiments of the present invention, if it is determined that a detailed description of a well-known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description will be omitted, and the terms to be described later are used in the embodiment of the present invention. As terms defined in consideration of the function of Therefore, the definition should be made based on the content throughout this specification.

Each block in the accompanying block diagram and combinations of steps in the flowchart may be executed by computer program instructions (execution engine), which are executed by the processor of a general-purpose computer, special-purpose computer, or other programmable data processing device. It may be mounted so that its instructions, which are executed by 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 in each step of the flowchart.

These computer program instructions may also be stored in a computer usable or computer readable memory which may direct a computer or other programmable data processing device to implement a function in a particular manner, and thus the computer usable or computer readable memory. It is also possible to produce an article of manufacture containing instruction means for performing the functions described in each block of the block diagram or each step of the flowchart, the instructions stored in the block diagram.

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

Also, each block or step may represent a module, segment, or portion of code comprising one or more executable instructions for executing specified logical functions, and in some alternative embodiments the blocks or steps referred to in the block or steps. It should be noted that it is also possible for functions to occur out of sequence. For example, it is possible that two blocks or steps shown one after another may be performed substantially simultaneously, and also the blocks or steps may be performed in the reverse order of the 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 illustrated below may be modified in various other 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 of ordinary skill in the art to which the present invention pertains.

1 is a view showing an abutment model, an inlay/onlay model, and a margin line generated by an inlay/onlay margin line design apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the inlay/onlay margin line design device 1 uses the abutment model 100 obtained from the user's teeth and the tooth model called from the tooth library to the inlay/onlay margin line (Margin Line). ) 102 , and using the generated margin line 102 , it is possible to design an inlay or an onlay to be coupled to the user's abutment.

The abutment model 100 is a three-dimensional digital model of the user's teeth to be combined inlay/onlay, and may be obtained from the user's teeth through digital equipment such as an oral scanner or a model scanner. The tooth model is a three-dimensional digital model of a standardized tooth shape. The margin line 102 is a line formed by contacting the abutment model 100 and the inlay/onlay model 101 .

The inlay/onlay margin line design apparatus 1 may retrieve a tooth model from a dental library in order to design the inlay/onlay model 101 to be coupled to the abutment model 100 . At this time, the tooth model retrieved from the tooth library may be disposed in the abutment model 100 to which the inlay/onlay model 101 is to be coupled. At this time, as the arrangement method, the tooth model is placed in the abutment model 100 based on the user's input in consideration of the size and direction of the abutment model 100, or the tooth model is automatically created using a preset algorithm. It can be placed on the abutment model 100 .

The inlay/onlay margin line design apparatus 1 may generate the margin line 102 by superimposing the tooth model on the abutment model 100 . The abutment model 100 may be used to design an inner surface model of the inlay/onlay model 101 . The tooth model may be used to design an exterior model of the inlay/onlay model 101 . The inlay/onlay margin line design device 1 may cut the abutment model 100 along the generated margin line 102 .

2 is a diagram illustrating the configuration of an inlay/onlay margin line design apparatus according to an embodiment of the present invention.

Referring to FIG. 2 , the inlay/onlay margin line design device 1 performs a CAD process to help prosthetic teeth in actual dentistry. The prosthetic CAD process refers to a series of processes that acquire dental data from a patient, load a virtual inlay/onlay model from a library through control by computer software, and then place it in a target position of the dental data virtually. The tooth data is data having two-dimensional and three-dimensional information on teeth including damaged target teeth. The target position is the target tooth position

The inlay/onlay margin line design device 1 is an electronic device capable of executing dental software such as CAD 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. In addition to CAD software, dental software includes guide programs, scan programs, and medical image processing programs. In addition, it can be applied to other general medical software other than for dental prosthetic surgery.

Referring to FIG. 2 , an inlay/onlay margin line design apparatus 1 according to an embodiment includes a data acquisition unit 10 , a storage unit 12 , a control unit 14 , an input unit 16 , and an output unit 18 . ) is included.

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

The oral model data is data having information on actual teeth including damaged teeth. The oral model data may be obtained by scanning a plaster model created by imitating a patient's oral cavity with a 3D scanner. As another example, the impression body created by imitating the oral cavity of a patient may be obtained by scanning it with a 3D scanner. As another example, it may be obtained by scanning the inside of the patient's oral cavity using a 3D intra-oral scanner. The acquired oral model data may be stored in the storage unit 12 . The data acquisition unit 10 according to an embodiment may acquire an abutment model of a tooth lost from oral model data.

The storage unit 12 stores various data such as information necessary for performing the operation of the inlay/onlay margin line design apparatus 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 from among all oral model data and CT data during dental treatment simulation. may be provided to the control unit 14 according to the At this time, the storage unit 12 stores the images of the upper and lower teeth of each patient, and sends the images of the upper and lower teeth matching the oral model data and CT data of a specific patient to the user's request. Accordingly, it may be provided to the control unit 14 . In addition, the storage unit 12 may have a dental library composed of a plurality of tooth model data and a prosthetic library composed of inlay/onlay model data, and may provide it to the controller 14 .

The control unit 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 prosthesis object in a dental image. A dental image in which a virtual object is implanted means a two-dimensional, three-dimensional, or multi-dimensional image showing a patient's tooth arrangement created for establishing a prosthetic surgery plan. Various types of images, such as X-ray, CT, panoramic image, oral scan image, image generated through reconstruction, and image obtained by registering multiple images, can be used for prosthetic surgery planning.

The control unit 14 according to an embodiment generates an inlay/onlay margin line and displays it on the screen through the output unit 18 . The control unit 14 may automatically or manually create a margin line. For example, a margin line may be generated by automatically detecting points characteristic for generating a margin line and then connecting the detected points, and connecting points selected by a user selection operation through the input unit 16 to create a margin You can also manually create lines.

The controller 14 may generate an abnormal region on the displayed margin line and display it on the screen through the output unit 18 . Among the continuous points constituting the margin line, a point in which the vertical position of a certain point differs from other points by a preset distance or more, and a preset interval with respect to the neighboring points based on the predetermined point among the continuous points constituting the margin line A point where there is a difference in the above may be determined as an abnormal region.

The controller 14 may select and correct an abnormal region displayed on the margin line. For example, the control unit 14 receives an operation signal by a user operation such as clicking a predetermined point in the abnormal region through the input unit 16 and dragging the start and end points of the abnormal region and manually margin The line may be corrected and displayed through the output unit 18 .

The control unit 14 according to an embodiment generates a bevel area on the generated margin line and displays it through the output unit 18 . The place where inlay/onlay prosthesis is needed is mainly in the occlusal surface of the posterior region. There is a limit to automatically creating a margin line in the area with the height and groove of the ridge, which is the morphological characteristic of the occlusal surface.

The bevel area refers to the slope additionally formed when the dentist forms the cavity for inlay/onlay. A slope is formed on the inner axial wall of the cavity for inlay/onlay, and the holding power and holding power of the inlay/onlay prosthesis are improved. It can be seen that the mainly created position is also formed inside the inlay margin line (in the direction of the inner wall of the cavity). A cavity refers to a tooth created by removing a tooth for the manufacture of an inlay prosthesis. The ridge is mainly a raised part in the outer part of the tooth, and on the occlusal surface of the posterior part, there are a major ridge and a minor ridge for each cusp, and an occlusal point is created on the ridge. The groove refers to a depression in the form of a valley formed between the ridges. At the occlusal point on the ridge, the food broken down by chewing activity flows down the slope of the ridge into the groove, passes through the teeth, and goes through the process of being delivered to the digestive system. The first step for food intake is chewing through tooth bite.

The control unit 14 according to an embodiment defines in detail a criterion for generating a normal margin line of the inlay/onlay in the occlusal region, and uses a tooth preparation method used only when generating the margin line of the inlay/onlay. to create a bevel region.

The output unit 18 displays the image data on the screen. The output unit 18 according to an embodiment displays the inlay/onlay margin line generated by the control unit 14, divides and displays the bevel area into identifiable visual information, and the user applies the bevel area to the margin line A user interface (UI, hereinafter referred to as 'UI') is provided so that changes can be easily controlled.

The input unit 16 receives a user manipulation signal. When the margin line is set through the control unit 14, the output unit 18 displays the UI for the bevel region creation command together with the generated margin line on the screen, and when a user command for the UI is input through the input unit 16 , the control unit 14 may start generating the bevel region.

3 is a diagram illustrating a flow of an inlay/onlay margin line design method according to an embodiment of the present invention.

Referring to FIG. 3 , the software acquires an abutment model into which the inlay/onlay model is to be inserted (S31). Next, an inlay/onlay margin line for the obtained abutment model is generated and displayed (S32). To create the inlay/onlay margin line, the software can place the dental model retrieved from the dental library into the abutment model to which the inlay/onlay model will be combined. For example, the tooth model is placed on the abutment model based on the user's input considering the size and direction of the abutment model, or the tooth model using a preset algorithm using the Buccal axis, Occlusal axis, Mesial axis, etc. of the abutment model can be automatically placed on the abutment model. In this case, the algorithm is not limited to a specific algorithm.

The software can create margin lines by superimposing the tooth model on the abutment model. For example, a tooth model disposed on the abutment model may be approached to form the same plane as the abutment model. In this process, the software calculates the curvature value on the surface of the tooth model to designate a point where the curvature change is greater than or equal to a preset value, and creates a margin line at the boundary where the abutment model meets the large curvature change. In addition, the software may set the inner model and the outer model of the inlay/onlay model using the generated margin line. After the inlay/onlay margin line is created, the inlay/onlay margin line may be displayed to the user. The software may manually create a margin line by connecting points selected by a user selection operation.

Furthermore, the software may generate an abnormal region on the displayed margin line and display it on the screen. Among the continuous points constituting the margin line, a point in which the vertical position of a certain point differs from other points by a preset distance or more, and a preset interval with respect to the neighboring points based on the predetermined point among the continuous points constituting the margin line A point where there is a difference in the above may be determined as an abnormal region.

The software can correct by selecting the abnormal area displayed on the margin line. For example, the software may receive a manipulation signal by a user action such as clicking a predetermined point in the abnormal region or dragging the start and end points of the abnormal region, and manually correct and display the margin line.

Then, the software creates a bevel area on the generated inlay/onlay margin line (S33). For creating a bevel area, the software may display a UI (eg, a 'create bevel area' button) for a user's command to create a bevel area in a layout in which a margin line is shown on the screen. In this case, when the user selects (eg, clicks) the 'create bevel region' button, the software may create the bevel region. For example, the software may generate a bevel area by analyzing the curvature of the area below the margin line of the generated inlay/onlay and above the cavity bottom (the bottom of the inlay/onlay preparation area). In this case, the length of the generated bevel region may be measured and this may be added to the margin gap distance value. A method of generating a bevel region will be described later with reference to FIGS. 5 and 6 , and a margin gap distance setting will be described later with reference to FIG. 7 .

Then, the software divides the generated bevel area into identifiable visual information and displays it (S34). For example, an external expression of at least one of a color, a shape, a size, an area, a thickness, and an emphasis of the bevel region may be changed and displayed. The software can display the state of the bevel area as identifiable visual information when the user clicks the 'create bevel area' button.

4 is a diagram illustrating an image screen according to an inlay/onlay margin line generation process according to an embodiment of the present invention.

Referring to FIG. 4 , the software acquires the abutment model 100 into which the inlay/onlay model is to be inserted, and generates and displays a margin line 102-1 for the obtained abutment model 100 . The margin line 102-1 may be drawn manually by a user, or the software may automatically generate a portion of maximum curvature that is close to orthogonal to the occlusal surface by searching for it. In this case, the software may display the UI for generating the bevel region while displaying the generated margin line 102-1 on the screen. When the user selects 'create bevel area' through the UI, the software creates the bevel area 104 and displays it on the screen in the form of identifiable visual information. When the bevel region 104 is created, a margin line 102-2 composed of the inner line of the lower portion of the bevel region 104 may be newly created, and the user may select the outer margin line 102-1 or the inner side. Among the margin lines 102 - 2 , a margin line to be selected as the final margin line may be set in advance, and a final margin line may be generated using the set line. As another example, both the outer margin line 102-1 and the inner margin line 102-2 may be shown to the user, and the selected margin line may be generated as the final margin line according to the user's operation.

5 is a diagram illustrating an example of generating an inlay/onlay margin line according to an embodiment of the present invention.

Referring to Figure 5, the software is based on the deepest fossa (Main Fossa) 501 in the occlusal surface 500 of the posterior part of the tooth model to derive the inlay / onlay margin line Ridge 504 ) defines the direction it is facing. The ridge 504 is a protruding portion indicated on the tooth surface. When the grooves 502 and 503, which are depressions in the valley shape, meet, a fossa is formed. The fovea formed in the most central part of the occlusal surface is called the central fovea (501), and it is the deepest orbit formed in the occlusal surface. In many cases, it is the deepest morphologically, and even if it is not deep, the fovea located at the most central part of the occlusal surface is called the central fovea (501). After defining the directionality of the ridge 504 , the grooves 502 and 503 also have the same direction as the ridge 504 .

Then, the software selects a point where the wall 505 perpendicular to the tooth surface direction from the occlusal surface 500 comes into contact with the occlusal surface 500 and the occlusal surface 500 with maximum curvature as close to vertical as possible due to the tooth preparation. Then, a margin line is created by connecting the selected point to the neighboring points. At this time, the directionality of the ridge 504 or grooves 502 and 503 is utilized so that the selected point does not follow the line of the ridge 504 or the line of the grooves 502 and 503 while being connected to the neighboring points. Not following the lines of the ridges 504 or grooves 502, 503 may include anatomical features of adjacent regions, such as ridges 504 and grooves 502, 503), if there is a maximum curvature at the point where the ridge is raised and bent), it is to be mistaken for a margin line to prevent an incorrect margin line from being created. The wall 505 refers to a side wall created by a preparation (Prep) operation that deletes a cavity in a tooth model. The software may classify and display the state of the margin line of the inlay/onlay with identifiable visual information (eg, color).

6 is a view showing an example of displaying a bevel area according to an embodiment of the present invention.

Referring to FIG. 6 , the software defines a region of maximum curvature that is close to orthogonal to the occlusal surface as a margin line of the inlay/onlay, and detects a slope 506 connected to the region. At this time, the slope 506 is included on the extension line of the wall 505, and the slope is regarded as a bevel area. At this time, the margin line (first line) (102-1 in FIG. 2) composed of the outer line of the upper part where the slope 506 begins to bend, and the margin line composed of the inner line of the lower part of the slope 506 A margin line including (a line formed by slope generation) (102-2 in FIG. 2 ) may be generated double. Accordingly, the user may set a margin line to be selected as the final margin line among the outer margin line 102-1 or the inner margin line 102-2 in advance, and create a final margin line using the set line. As another example, both the outer margin line 102-1 and the inner margin line 102-2 may be shown to the user, and the user may be guided to create a desired margin line as the final margin line according to a given situation.

When the visual information of the bevel area is displayed to be distinguished from the visual information on the inlay/onlay margin line and the margin line 102-2 including the bevel area is generated, the margin line 102-1 that does not include the bevel area ) and visual information can be differentiated so that they can be visualized.

Next, a UI in consideration of convenience is provided so that the user does not directly manipulate the inlay/onlay margin line in order to easily create and change the margin line including the bevel area.

7 is a diagram illustrating an example of measuring a length of a generated bevel region and adding it to a margin gap distance value according to an embodiment of the present invention.

Referring to FIG. 7 , after the software measures the length 710 of the bevel region, the measured length 710 of the bevel region is added to the margin gap distance 700 . Since the bevel region is formed in the margin gap portion, the margin gap distance 700 is calculated by summing the lengths 710 of the bevel region. 7 illustrates a margin gap distance 700 in which addition to the bevel region length 710 is reflected.

8 is a diagram illustrating a software screen for generating an inlay/onlay margin line and displaying a bevel area on the generated margin line according to an embodiment of the present invention.

Referring to FIG. 8 , the software generates an inlay/onlay margin line 102-1, and creates bevel regions 104-1 and 104-2 on the generated margin line 102-1, and generates The bevel regions 104-1 and 104-2 are divided into identifiable visual information and displayed. In this case, the first bevel area 104-1 shows a case where the generated bevel area is displayed to the user, and the second bevel area 104-2 shows the user selects the bevel area shown to the user (eg, Click), the visual information (eg, color) of the two bevel areas 104-1 and 104-2 can be displayed separately.

So far, the present invention has been focused on the embodiments thereof. Those of ordinary skill in the art to which the present invention pertains will understand that the present invention can be implemented in modified forms without departing from the essential characteristics of the present invention. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is indicated in the claims rather than the foregoing description, and all differences within the scope equivalent thereto should be construed as being included in the present invention.

Claims (15)

obtaining an abutment model into which the inlay/onlay model is to be inserted;
generating and displaying an inlay/onlay margin line for the obtained abutment model;
generating a bevel area on the displayed margin line; and
classifying and displaying the generated bevel area into identifiable visual information;
Inlay / onlay margin line design method comprising a. The method of claim 1, wherein the generating and displaying an inlay/onlay margin line comprises:
retrieving the tooth model from the tooth library; and
After overlapping the imported tooth model with the abutment model, generating and displaying a margin line by calculating the curvature value on the surface of the tooth model;
Inlay / onlay margin line design method comprising a. The method of claim 2, wherein the generating and displaying a margin line through calculation of a curvature value comprises:
selecting a point at which the wall vertically removed from the occlusal surface to the tooth surface direction contacts the occlusal surface with maximum curvature during tooth preparation; and
generating and displaying a margin line while connecting the selected point to neighboring points;
Inlay / onlay margin line design method comprising a. The method of claim 3, wherein the generating and displaying a margin line through calculation of a curvature value comprises:
Defining the direction in which the ridge is directed with respect to the central fovea in the occlusal surface of the posterior part of the tooth model; and
defining the direction of the groove in the same direction as the ridge; further comprising,
The direction of the ridges and grooves is an inlay/onlay margin line design method, characterized in that the selected point is connected with neighboring points when generating the margin line and provides a direction so as not to follow the line of the ridge or the line of the groove. The method of claim 1, wherein the generating of the bevel region comprises:
Inlay/onlay margin line design, characterized in that the user interface for the bevel area creation command is displayed on the screen together with the created margin line, and the bevel area creation is started when a user command is input through a user action on the user interface Way. The method of claim 1, wherein the generating of the bevel region comprises:
An inlay/onlay margin line design method, characterized in that a bevel area is created by defining a portion of maximum curvature that is close to orthogonal to the occlusal surface of the tooth model as a margin line, and detecting a slope connected to the defined margin line area. The method of claim 1, wherein the inlay/onlay margin line design method is
displaying an outer margin line composed of an outer line of the bevel region and an inner margin line composed of an inner line of the bevel region on a screen; and
Either set the margin line to be selected as the final margin line among the outer margin line or the inner margin line in advance and create the final margin line using the set line, or present both the outer margin line and the inner margin line to the user and follow the user's action generating the selected margin line as a final margin line;
Inlay / onlay margin line design method, characterized in that it further comprises. The method of claim 1, wherein the inlay/onlay margin line design method is
measuring the length of the generated bevel region and adding it to the margin gap distance value;
Inlay / onlay margin line design method, characterized in that it further comprises. The method of claim 1, wherein the inlay/onlay margin line design method is
displaying an abnormal region on the displayed margin line; and
selecting and correcting the displayed abnormal area;
Inlay / onlay margin line design method, characterized in that it further comprises. a data acquisition unit for acquiring an abutment model into which the inlay/onlay model is to be inserted;
a control unit generating an inlay/onlay margin line for the obtained abutment model and generating a bevel region on the generated margin line; and
an output unit that displays screen information configured by the control unit, displays the generated margin line, and divides the generated bevel area into identifiable visual information;
Inlay / onlay margin line design device comprising a. 11. The method of claim 10, wherein the control unit
Inlay/onlay, characterized in that a margin line is created by selecting the point where the wall, which has been perpendicularly removed from the occlusal to the tooth surface, meets the occlusal surface with maximum curvature at the time of tooth preparation, and connecting the selected point with neighboring points Margin line design device. The method of claim 11, wherein the control unit
Inlay/onlay, characterized in that a margin line is created by selecting the point where the wall, which has been perpendicularly removed from the occlusal to the tooth surface, meets the occlusal surface with maximum curvature at the time of tooth preparation, and connecting the selected point with neighboring points Margin line design device. 13. The method of claim 12, wherein the control unit
In the occlusal surface of the posterior part of the tooth model, the direction of the ridge is defined based on the central fovea, and the direction of the groove is defined in the same direction as the ridge,
Inlay/onlay margin line design device, characterized in that the direction of the ridges and grooves provides directionality in order not to follow the line of the ridge or the line of the groove while the selected point is connected to the neighboring points when generating the margin line. 11. The method of claim 10, wherein the control unit
An inlay/onlay margin line design device, characterized in that a bevel area is created by defining a portion of maximum curvature that is close to orthogonal to the occlusal surface of the tooth model as a margin line, and detecting a slope connected to the defined margin line area. 11. The method of claim 10, wherein the control unit
Inlay/onlay margin line design device, characterized in that by measuring the length of the created bevel region and adding it to the margin gap distance value.

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