KR102372759B1 - Method, Apparatus and Recording Medium for Modifying Adjacent Tooth Contact of Prosthesis - Google Patents

Abstract

Disclosed are a method for correcting an adjacent tooth contact of a prosthesis and an apparatus for modifying an adjacent tooth contact. A method of modifying an adjacent tooth contact of a prosthesis includes: loading a crown selected based on a patient's tooth data from a library; displaying the crown on a patient's tooth model displayed on a display by using a contact location among contact information stored in advance with respect to the crown; and using the contact strength among the contact information stored in advance with respect to the crown to modify and display the amount of invasion of adjacent teeth in the contact area of the crown.

Description

Method, Apparatus and Recording Medium for Modifying Adjacent Tooth Contact of Prosthesis}

The present invention relates to a method and apparatus for correcting contact between adjacent teeth of a prosthesis, and more particularly, automatically performs point contact between a crown and an adjacent tooth using contact information with the adjacent tooth stored in advance in a library model of the crown. It relates to a method and apparatus for setting as

Conventionally, a method has been provided in which a library model of a crown can be designed manually by a user or automatically by a computer algorithm using a tool provided in a 3D CAD software to be placed on a patient's tooth model.

However, this method may not be an optimal design because there is no consideration for contact with adjacent teeth when the library model of the crown is placed on the patient's tooth model. Accordingly, there is a problem in that the user must manually set the contact position, contact area, and contact strength with the adjacent teeth in order to ensure the function of the crown shape for a specific patient.
Prior art literature: Patent Publication No. 10-2018-0060502 (2018.06.07.)

The present invention provides a method and apparatus for automatically setting a point contact between a crown and an adjacent tooth by using contact information with the adjacent tooth stored in advance in a library model of the crown.

In addition, the present invention provides a method and apparatus for finely deforming a crown by providing a separate user interface to the contact area of the crown in contact with the adjacent teeth.

According to an embodiment of the present invention, a method for correcting an adjacent tooth contact of a prosthesis includes: loading a crown selected based on patient's tooth data from a library; displaying the crown on a patient's tooth model displayed on a display by using a contact location among contact information stored in advance with respect to the crown; and using the contact strength among the contact information stored in advance with respect to the crown to modify and display the amount of invasion of adjacent teeth in the contact area of the crown.

In the displaying of the crown, adjacent teeth of the tooth model to the crown may be arranged so that the crown abuts at a single point at the contact position.

The deforming and displaying the amount of invasion of adjacent teeth in the contact area of the crown may include enlarging or reducing the crown based on contact strength among the pre-stored contact information; and modifying the shape of the contact area of the enlarged or reduced crown in consideration of the shape of the proximal surface of the adjacent teeth.

The method may further include providing a user interface through which the user can fine-tune the crown in which the amount of invasion of adjacent teeth in the contact area is deformed.

The providing of the user interface may include arranging a menu of a first type for modifying the contact strength between the deformed crown and the adjacent tooth to be located within a predetermined distance from the contact area between the deformed crown and the adjacent tooth. there is.

The providing of the user interface may include disposing a contact area between the deformed crown and an adjacent tooth and a menu of a second type capable of modifying the contact area on the contact area.

An apparatus for correcting an adjacent tooth contact of a prosthesis according to an embodiment of the present invention includes a processor, the processor loads a crown selected based on the patient's tooth data from a library, and contact information stored in advance for the crown The crown is displayed on the patient's tooth model displayed on the display using the contact position, and the amount of invasion of adjacent teeth in the contact area of the crown is modified and displayed using the contact strength among the contact information stored in advance for the crown. can

The processor may arrange adjacent teeth of the tooth model to the crown so that the crown abuts at a single point at the contact position.

The processor enlarges or reduces the crown based on the contact strength among the pre-stored contact information, and modifies the shape of the contact area of the enlarged or reduced crown in consideration of the shape of the proximal surface of the adjacent teeth, thereby making the contact of the crown It is possible to modify the amount of invasion of adjacent teeth for a region.

The processor may provide a user interface through which the user can fine-tune the crown in which the amount of invasion of adjacent teeth in the contact area is modified.

The processor may provide a user interface by arranging a menu of a first type capable of modifying the contact strength between the deformed crown and the adjacent tooth to be located within a predetermined distance from the contact area between the deformed crown and the adjacent tooth. there is.

The processor may provide a user interface by arranging a contact area between the deformed crown and an adjacent tooth and a menu of a second type capable of modifying the contact area on the contact area.

According to the present invention, point contact between the crown and the adjacent tooth can be automatically set by using the contact information with the adjacent tooth stored in advance in the library model of the crown.

Also, according to the present invention, the contact strength between the crown and the adjacent tooth can be modified by providing a one-click user interface in proximity to the contact area of the crown in contact with the adjacent tooth.

Also, according to the present invention, the contact area and contact area between the crown and the adjacent tooth can be modified by providing a control point type user interface on the contact area of the crown in contact with the adjacent tooth.

1 is a diagram illustrating a system for correcting an adjacent tooth contact of a prosthesis according to an embodiment of the present invention.
2 is a diagram illustrating an apparatus for correcting an adjacent tooth contact according to an embodiment of the present invention.
3 is a view showing an initial arrangement method of the crown according to an embodiment of the present invention.
4 is a diagram illustrating a method for setting a surface contact between a crown and an adjacent tooth that is a natural tooth according to an embodiment of the present invention.
5 is a view illustrating a method for setting a surface contact between a crown and an adjacent tooth that is an implant according to an embodiment of the present invention.
6 is a diagram illustrating an example of a user interface according to an embodiment of the present invention.
7 is a view showing state information on a contact area of a crown according to an embodiment of the present invention.
8 is a flowchart illustrating a method for modifying a neighbor contact according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a system for correcting an adjacent tooth contact of a prosthesis according to an embodiment of the present invention.

Referring to FIG. 1 , the proximal contact correction system 100 according to the present invention includes a first measuring device 110 , a second measuring device 120 , and a neighboring contact correcting device 130 . The first measuring device 110 may generate a 3D image such as CT data, and the second measuring device 120 may generate a 2D image such as X-ray data.

In addition, the adjacent tooth contact correcting device 130 uses contact information between the patient's tooth model received from the first measuring device 110 and the second measuring device 120 and the adjacent tooth previously stored in the library model of the crown. The face contact between the crown and adjacent teeth can be established automatically. In this case, the contact information may include information on a contact location between the crown and an adjacent tooth, a contact area, and a contact area.

In more detail, the adjacent tooth contact correction apparatus 130 divides and identifies each of a plurality of individual teeth in the patient's tooth model received from the first measurement apparatus 110 and the second measurement apparatus 120, and then identifies the identified plurality. Crowns for individual teeth in need of treatment among the individual teeth of the library may be loaded from the library.

The adjacent tooth contact correction apparatus 130 uses information on a contact location among contact information stored in advance for the loaded crown to enlarge the initially placed crown using information on strength of the loaded crown in the patient's tooth model. Alternatively, the placement of the crown on the patient's tooth model may be completed by adjusting the amount of invasion of adjacent teeth through reduction. A more detailed crown arrangement method will be described in detail with reference to the following drawings.

2 is a diagram illustrating an apparatus for correcting an adjacent tooth contact according to an embodiment of the present invention.

Referring to FIG. 2 , the apparatus 130 for correcting a proximity contact of the present invention may include a processor 131 , a display 132 , and an interface 133 . First, the processor 131 may receive a tooth model of a patient who intends to establish an orthodontic treatment plan from the first measuring device 110 or the second measuring device 120 . In this case, the received patient's tooth model may be 3D scan data collected through a CT, 3D scanner, intraoral scanner, or the like.

Then, the processor 131 may divide and identify each of the plurality of individual teeth in the received tooth model. More specifically, the processor 131 may automatically detect the crown and gum of each of the plurality of individual teeth by using the curvature information included in the received image of the tooth model. Alternatively, the processor 131 may semi-automatically detect the crown and gum of each of a plurality of individual teeth by giving a feature point of the crown to the received tooth model, or using crown information directly input by the user through the user interface 133 . It is also possible to manually detect the crown and gum of each of the individual teeth. Through the crown and gum detected in this way, the processor 131 may divide and identify each of the plurality of individual teeth in the received tooth model.

The processor 131 may load a crown for an individual tooth requiring treatment from among the identified plurality of individual teeth from the library. Thereafter, the processor 131 may display the loaded crown on the patient's tooth model displayed on the display 132 by using the contact location information among the contact information stored in advance with respect to the loaded crown. In this case, the processor 131 may initially arrange and display the loaded crown as shown in FIG. 3 so as to abut a single point at the contact position with respect to the adjacent tooth of the tooth model with respect to the corresponding loaded crown.

Thereafter, the processor 131 may deform and display the shape of the initially disposed crown by using the information on the contact strength among the contact information stored in advance. In this case, the processor 131 may display the shape of the initially disposed crown by changing it through different methods according to the type of adjacent teeth.

First, when the adjacent value is a natural value, the processor 131 enlarges or reduces the initially placed crown as shown in FIG. You can control the amount of invasion of adjacent teeth.

However, if the adjacent tooth is an implant rather than a natural tooth, if the crown invades the adjacent tooth, the implant may be damaged. Accordingly, when the adjacent tooth is an implant, the processor 131 enlarges or reduces the initially placed crown as shown in FIG. By doing so, the amount of invasion of adjacent teeth can be controlled. Thereafter, the processor 131 may automatically set the surface contact between the crown and the adjacent tooth by deforming the contact area of the crown that invades the adjacent tooth in consideration of the shape of the adjacent surface of the adjacent tooth as shown in FIG. 5C . That is, the processor 131 may delete the contact area of the crown that invades the adjacent tooth, and may display the deleted contact area by smoothing it so that it is smooth.

Meanwhile, the processor 131 may increase user convenience by providing a separate user interface 133 capable of modifying the contact area and contact strength with respect to the crown automatically placed on the patient's tooth model. A more detailed user interface 133 will be described with reference to FIG. 5 below.

6 is a diagram illustrating an example of a user interface according to an embodiment of the present invention.

를 기준으로 크라운과 인접치 사이의 컨택 강도를 일정 단계만큼 수정할 수 있다.Referring to (a) of FIG. 6 , the processor 131 may arrange a menu of a first type for modifying the contact strength between the crown and the adjacent tooth to be located within a predetermined distance from the contact area between the crown and the adjacent tooth. . As an example, the first type of menu may correspond to the one-click user interface 133, and the thickness of the occlusal paper (10)

Based on , the contact strength between the crown and adjacent teeth can be modified by a certain level.

That is, when the user clicks the plus (+) or minus (-) displayed on the menu of the first form through the mouse cursor, it can be confirmed that the contact strength between the crown and the adjacent tooth is modified as shown in (a) of FIG. 6 . there is. However, in relation to the contact strength, it is possible to modify the contact strength in three steps in FIG.

Alternatively, referring to FIG. 6B , the processor 131 may arrange a menu of a second type for modifying the contact area between the crown and the adjacent tooth on the contact area between the crown and the adjacent tooth. For example, the second type of menu may correspond to the user interface 133 of the control point method, through which the user may directly modify the shape of the contact area.

That is, as shown in (b) of FIG. 6 , the user can modify the contact area between the crown and the adjacent tooth by dragging and moving the control point on the spline displayed on the menu of the second type through the mouse cursor, thereby modifying the contact area. It can also be modified in conjunction. In this case, the shape of the crown to be modified may be modified only in the contact area or contact area while maintaining the invasion amount of adjacent teeth.

Meanwhile, referring to FIG. 6C , the processor 131 may arrange a menu of a third type for modifying the contact area between the crown and the adjacent tooth to be located within a predetermined distance from the contact area between the crown and the adjacent tooth. can As an example, the user clicks the up/down or left/right arrow UI provided near the spline instead of modifying the contact area by dragging the control point of the spline as shown in FIG. The contact area can be modified by a value (eg, 0.2 mm per click).

7 is a view showing state information on a contact area of a crown according to an embodiment of the present invention.

As mentioned above, the adjacent tooth contact correction device 130 of the present invention provides a method for the user to manually correct the contact area between the crown and the adjacent tooth automatically set through a separate user interface 133 . can

At this time, the adjacent tooth contact correction device 130 may help the user to intuitively identify a problem with the contact area by providing status information indicating the appropriateness of the contact area between the crown and the adjacent tooth modified by the user. there is.

For example, when the contact area for the contact area between the crown and the adjacent teeth modified by the user differs from the contact area previously stored for the crown by a certain percentage (for example, 3 times or more), The proximity contact correction apparatus 130 may provide the user with whether the contact area is appropriate or not through an identifier such as a change in color that can draw the user's attention as shown in FIG. 7A .

On the other hand, when the contact position of the crown corrected by the user and the contact area of the adjacent tooth has a difference of more than a predetermined area compared to the contact location stored in advance with respect to the crown, the adjacent tooth contact correcting device 130 is shown in FIG. As shown in b), it is possible to provide the user with whether the contact area is appropriate or not through an identifier such as a color change or a reference line.

Specifically, the adjacent tooth contact correction device 130 identifies the adjacent surface of the crown by using the contact information stored in advance in the library model of the crown, and when the contact area is generated outside the identified adjacent surface of the crown, a separate warning or notification is issued. can be provided to users. First, the proximal contact correction device 130 sets the marginal ridge portion that passes from the proximal surface of the crown to the occlusal surface as a reference point, and creates a straight line parallel to the occlusal plane at the point where it meets the set reference point. can In this case, the adjacent tooth contact correction apparatus 130 may define the generated horizontal straight line as a vertical reference line of the adjacent surface.

In addition, the proximal contact correction device 130 sets the marginal ridge portion crossing from the proximal surface of the crown to the buccal direction and the lingual direction as a reference point, and is perpendicular to the occlusal plane at the point where it meets the set reference point. straight lines can be created. In this case, the adjacent tooth contact correcting apparatus 130 may define the generated vertical straight lines as a horizontal reference line of the adjacent surface.

That is, when the contact area is generated outside the proximal surface of the crown based on the vertical and horizontal reference lines of the proximal surface as shown in FIG. Whether or not the contact area is appropriate can be provided.

The state information indicating the adequacy of the contact area between the crown and the adjacent teeth is not limited to the above example and may be provided to the user through various methods.

8 is a flowchart illustrating a method for correcting a neighbor contact according to an embodiment of the present invention.

In step 810 , the adjacent tooth contact correcting device 130 receives the patient's tooth model from the first measuring device 110 or the second measuring device 120 , and each of a plurality of individual teeth from the received tooth model. can be identified by dividing More specifically, the adjacent tooth contact correction apparatus 130 may automatically detect the crown and gum of each of the plurality of individual teeth by using the curvature information included in the received image of the tooth model. Alternatively, the adjacent tooth contact correction device 130 provides a feature point of the crown to the received tooth model to semi-automatically detect the crown and gum of each of a plurality of individual teeth, or by using the crown information directly input by the user through the user interface. It is also possible to manually detect the crown and gum of each of the plurality of individual teeth.

In step 820, the adjacent tooth contact correction device 130 loads the crown for the individual tooth that needs treatment among the identified plurality of individual teeth from the library, and then places the crown on the contact position among the contact information stored in advance for the loaded crown. The crown loaded on the patient's tooth model displayed on the display may be displayed using the information on the . In this case, the adjacent tooth contact correcting apparatus 130 may initially arrange and display the loaded crown so as to abut a single point at the contact position with respect to the adjacent tooth of the tooth model with respect to the loaded crown.

Meanwhile, the adjacent tooth contact correction apparatus 130 may display the initially disposed crown by changing the shape of the crown in different ways depending on the type of the adjacent tooth. To this end, in operation 830 , the adjacent tooth contact correcting apparatus 130 may determine whether the initially placed adjacent tooth of the crown is a natural tooth.

If the adjacent tooth of the initially placed crown is a natural tooth, the adjacent tooth contact correcting apparatus 130 transforms and displays the shape of the initially placed crown by using the contact strength information among the contact information stored in advance in step 840 . can do. In more detail, the adjacent tooth contact correction apparatus 130 may adjust the amount of adjacent tooth invasion by enlarging or reducing the initially placed crown using information on contact strength.

Contrary to this, if the adjacent tooth of the initially placed crown is an implant rather than a natural tooth, the adjacent tooth contact correcting apparatus 130 uses information on contact strength from among the contact information stored in advance to restore the initially placed crown in step 850 . The amount of invasion of adjacent teeth can be controlled by enlarging or reducing them. At this time, when the adjacent tooth is an implant, if the crown invades the adjacent tooth, the implant may be damaged.

Accordingly, in step 860 , the adjacent tooth contact correction apparatus 130 automatically sets the surface contact between adjacent teeth of the crown by transforming the contact area of the crown that invades the adjacent teeth in consideration of the shape of the adjacent surface of the corresponding adjacent tooth. can

In a subsequent step 870 , when receiving a correction request for the crown through the user interface, the proximal contact correction device 130 modifies and displays the contact area and contact strength for the crown according to the received correction request. there is.

Meanwhile, the method according to the present invention is written as a program that can be executed on a computer and can be implemented in various recording media such as magnetic storage media, optical reading media, and digital storage media.

Implementations of the various techniques described herein may be implemented in digital electronic circuitry, or in computer hardware, firmware, software, or combinations thereof. Implementations may be implemented for processing by, or controlling the operation of, a data processing device, eg, a programmable processor, computer, or number of computers, a computer program product, ie an information carrier, eg, a machine readable storage It may be embodied as a computer program tangibly embodied in an apparatus (computer readable medium) or a radio signal. A computer program, such as the computer program(s) described above, may be written in any form of programming language, including compiled or interpreted languages, as a standalone program or in a module, component, subroutine, or computing environment. It can be deployed in any form, including as other units suitable for use in A computer program may be deployed to be processed on one computer or multiple computers at one site or to be distributed across multiple sites and interconnected by a communications network.

Processors suitable for processing a computer program include, by way of example, both general and special purpose microprocessors, and any one or more processors of any kind of digital computer. In general, a processor will receive instructions and data from either read-only memory or random access memory or both. Elements of a computer may include at least one processor that executes instructions and one or more memory devices that store instructions and data. In general, a computer may include one or more mass storage devices for storing data, for example magnetic, magneto-optical disks, or optical disks, receiving data from, sending data to, or both. may be combined to become Information carriers suitable for embodying computer program instructions and data are, for example, semiconductor memory devices, for example, magnetic media such as hard disks, floppy disks and magnetic tapes, Compact Disk Read Only Memory (CD-ROM). ), optical recording media such as DVD (Digital Video Disk), magneto-optical media such as optical disk, ROM (Read Only Memory), RAM (RAM) , Random Access Memory), flash memory, EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), and the like. Processors and memories may be supplemented by, or included in, special purpose logic circuitry.

In addition, the computer-readable medium may be any available medium that can be accessed by a computer, and may include both computer storage media and transmission media.

While this specification contains numerous specific implementation details, they should not be construed as limitations on the scope of any invention or claim, but rather as descriptions of features that may be specific to particular embodiments of particular inventions. should be understood Certain features that are described herein in the context of separate embodiments may be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment may also be implemented in multiple embodiments, either individually or in any suitable subcombination. Further, although features operate in a particular combination and may be initially depicted as claimed as such, one or more features from a claimed combination may in some cases be excluded from the combination, the claimed combination being a sub-combination. or a variant of a sub-combination.

Likewise, although acts are depicted in the drawings in a particular order, it should not be construed that all acts shown must be performed or that such acts must be performed in the specific order or sequential order shown to obtain desirable results. In certain cases, multitasking and parallel processing may be advantageous. Further, the separation of the various device components of the above-described embodiments should not be construed as requiring such separation in all embodiments, and the program components and devices described may generally be integrated together into a single software product or packaged into multiple software products. You have to understand that you can.

On the other hand, the embodiments of the present invention disclosed in the present specification and drawings are merely presented as specific examples to aid understanding, and are not intended to limit the scope of the present invention. It will be apparent to those of ordinary skill in the art to which the present invention pertains that other modifications based on the technical spirit of the present invention can be implemented in addition to the embodiments disclosed herein.

100: adjacent contact correction system
110: first measuring device
120: second measuring device
130: adjacent contact correction device

Claims (13)

A method for correcting an adjacent tooth contact of a prosthesis performed by a processor, the method comprising:
loading a crown for an individual tooth in need of treatment among a plurality of individual teeth identified based on the patient's tooth data from a library;
displaying the loaded crown on a patient's tooth model displayed on a display by using information on a contact location among contact information stored in advance with respect to the loaded crown; and
Changing and displaying the shape of the loaded crown by adjusting the amount of invasion of adjacent teeth in the contact area of the loaded crown using information on contact strength among the contact information stored in advance with respect to the loaded crown
A method of correcting an adjacent tooth contact of a prosthesis, comprising: According to claim 1,
The step of displaying by deforming the shape of the loaded crown,
If the adjacent tooth for the loaded crown is a natural tooth, the adjacent tooth contact correction of the prosthesis is characterized in that the amount of invasion of the adjacent tooth is adjusted by enlarging or reducing the corresponding crown by using the contact strength information among the contact information stored in advance. method. According to claim 1,
The step of displaying by deforming the shape of the loaded crown,
adjusting the amount of invasion of the adjacent tooth by enlarging or reducing the corresponding crown using information on contact strength among the previously stored contact information when the adjacent tooth for the loaded crown is a prosthesis; and
smoothing by deleting a contact area that invades adjacent teeth among the contact areas of the enlarged or reduced crown
A method of correcting an adjacent tooth contact of a prosthesis, comprising: According to claim 1,
Providing a user interface through which a user can perform fine adjustments on the crown in which the amount of invasion of adjacent teeth in the contact area is modified;
Proximity contact correction method of the prosthesis, characterized in that it further comprises. 5. The method of claim 4,
Providing the user interface comprises:
Proximity contact of a prosthesis, characterized in that a menu of a first type capable of modifying the contact strength between the deformed crown and the adjacent teeth is positioned within a predetermined distance with respect to the contact area between the deformed crown and the adjacent teeth. How to fix. 5. The method of claim 4,
Providing the user interface comprises:
and disposing a contact area between the deformed crown and an adjacent tooth and a menu of a second type for modifying the contact area on the contact area. A computer-readable recording medium in which a program for executing the method of any one of claims 1 to 6 is recorded. including a processor;
The processor loads, from a library, a crown for an individual tooth that needs treatment among a plurality of individual teeth identified based on the patient's tooth data, and places the crown on a contact location among contact information stored in advance for the loaded crown. The loaded crown is displayed on the patient's tooth model displayed on the display using information about An apparatus for modifying an adjacent tooth contact of a prosthesis, characterized in that the shape of the loaded crown is changed and displayed by adjusting the amount of invasion of the adjacent tooth. 9. The method of claim 8,
The processor is
If the adjacent tooth for the loaded crown is a natural tooth, the adjacent tooth contact correction of the prosthesis is characterized in that the amount of invasion of the adjacent tooth is adjusted by enlarging or reducing the corresponding crown by using the contact strength information among the contact information stored in advance. Device. 9. The method of claim 8,
The processor is
When the adjacent tooth to the loaded crown is a prosthesis, the amount of invasion of the adjacent tooth is adjusted by enlarging or reducing the corresponding crown using information on contact strength among the previously stored contact information, and the contact area of the enlarged or reduced crown A device for correcting an adjacent tooth contact of a prosthesis, characterized in that the smoothing process is performed by deleting a contact area that invades the adjacent tooth. 9. The method of claim 8,
The processor is
and providing a user interface through which a user can fine-tune the crown in which the amount of invasion of adjacent teeth in the contact area is deformed. 12. The method of claim 11,
The processor is
A user interface is provided by arranging a menu of a first type capable of modifying the contact strength between the deformed crown and the adjacent teeth to be located within a predetermined distance with respect to the contact area between the deformed crown and the adjacent teeth. Prosthetic contact correction device. 12. The method of claim 11,
The processor is
and providing a user interface by arranging a contact area between the deformed crown and an adjacent tooth and a menu of a second type for modifying the contact area on the contact area.

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