WO2022250282A1

WO2022250282A1 - Apparatus and method for designing orthodontic appliance

Info

Publication number: WO2022250282A1
Application number: PCT/KR2022/005009
Authority: WO
Inventors: 김영우
Original assignee: 한국교통대학교산학협력단
Priority date: 2021-05-25
Filing date: 2022-04-07
Publication date: 2022-12-01
Also published as: KR20220158999A

Abstract

Disclosed is an apparatus for designing an orthodontic appliance. This apparatus may include: one or more processors; and memory which is electrically connected to the processors and stores at least one piece of code executed in the processors. Accordingly, the orthodontic appliance can be easily designed, and user convenience can be enhanced.

Description

Apparatus and method for designing orthodontic appliance

The present disclosure relates to a technique of designing an orthodontic appliance using a program, and more particularly, to a technique of optimally arranging brackets and wires of an orthodontic appliance.

Orthodontics can be divided into labial and lingual orthodontics. Labial orthodontics is to attach an orthodontic appliance to the lip-facing side of the teeth, and lingual orthodontics is to attach the orthodontic appliance to the lingual-facing side of the teeth.

Since labial correction is not aesthetically pleasing due to the exposure of the orthodontic appliance to the outside, the foreign body sensation is relatively large, it is inconvenient to pronounce, and the cost is high, so lingual correction is preferred. However, there are cases in which lingual orthodontics are necessarily required when advanced orthodontics is required rather than simple orthodontics.

For example, in the case of corticotomy to rapidly correct protruding incisors, a miniscrew or miniplate is used to pull the incisors backward to the palate to fix them on the palate. Since an anchorage must be formed and the anchorage and teeth must be connected with a wire to be retracted, the shape of lingual correction is naturally obtained.

However, since the orthodontic appliance itself is manually produced by the dental technician according to the order of the dental staff, if a method of automatically performing the arrangement of brackets fixed to the teeth and the arrangement of wires connecting the brackets to each other is provided, the teeth The design and production of orthodontic instruments will be able to be performed more effectively.

The above description is merely for the purpose of providing background information related to an embodiment of the present invention, and the description does not necessarily constitute prior art.

One problem to be solved by the present invention is to provide a method for a worker to conveniently and accurately design an orthodontic appliance.

Another object of the present invention is to provide a bracket of an orthodontic appliance virtually using a program and a method for designing arrangement of wires connecting the brackets.

The object of the present invention is not limited to the above-mentioned tasks, and other objects and advantages of the present invention not mentioned above can be understood by the following description and will be more clearly understood by the embodiments of the present invention. It will also be seen that the objects and advantages of the present invention may be realized by means of the instrumentalities and combinations indicated in the claims.

A method of designing an orthodontic appliance performed by a processor according to an embodiment of the present invention may be provided.

The design method includes obtaining an oral cavity image in which a row of teeth formed by a plurality of teeth is expressed; arranging a bracket for orthodontic treatment in a predetermined region of each of at least some of the plurality of teeth; arranging wire segments extensible in both directions based on the wire fixing points of the brackets; and virtually completing the orthodontic appliance through coupling between adjacent wire segments.

Here, based on the operator's selection command, the bracket may be disposed, the wire segment may be disposed, and coupling between adjacent wire segments may be performed.

The processor may be configured to virtually complete the orthodontic appliance by using a neural network-based learning model of at least one of a pre-learned bracket placement model, a wire placement model, and a wire combination model.

An apparatus for designing an orthodontic appliance according to an embodiment of the present invention includes one or more processors; and a memory electrically connected to the processor and storing at least one code executed by the processor.

When the memory is executed by the processor, the processor sets a bracket for orthodontic treatment to a predetermined region of each of at least some of the plurality of teeth when an oral cavity image representing a row formed by a plurality of teeth is acquired. A code causing the orthodontic appliance to be virtually completed may be stored by disposing wire segments extendable in both directions based on the wire fixing points of the brackets, and coupling adjacent wire segments to each other.

The processor may be configured to virtually complete the orthodontic appliance by using a neural network-based learning model of at least one of a pre-learned bracket placement model, wire placement model, and wire combination model storable in the memory.

According to various embodiments of the present invention, by conveniently and accurately providing an orthodontic appliance design service, user convenience can be improved and the orthodontic appliance can be rapidly produced.

The effects of the present invention are not limited to those mentioned above, and other effects not mentioned will be clearly understood by those skilled in the art from the description below.

1 is a view for schematically explaining an orthodontic appliance generating system;

2 is a block diagram showing the configuration of an apparatus for designing an orthodontic appliance according to an embodiment of the present invention;

3A to 3C are views for explaining a method of disposing a bracket on a tooth according to an embodiment of the present invention;

Figures 4a to 4c are views for explaining the arrangement and processing of the wire connecting the brackets to each other, and,

5 is a sequence diagram illustrating a method for designing an orthodontic appliance according to an embodiment of the present invention.

Hereinafter, the embodiments disclosed in this specification will be described in detail with reference to the accompanying drawings, but the same or similar elements are given the same reference numerals regardless of reference numerals, and redundant description thereof will be omitted.

The suffixes "module" and "unit" for components used in the following description are given or used together in consideration of ease of writing the specification, and do not have meanings or roles that are distinct from each other by themselves.

In addition, in describing the embodiments disclosed in this specification, if it is determined that a detailed description of a related known technology may obscure the gist of the embodiment disclosed in this specification, the detailed description thereof will be omitted. In addition, the accompanying drawings are only for easy understanding of the embodiments disclosed in this specification, the technical idea disclosed in this specification is not limited by the accompanying drawings, and all changes included in the spirit and technical scope of the present invention , it should be understood to include equivalents or substitutes.

Terms including ordinal numbers, such as first and second, may be used to describe various components, but the components are not limited by the terms. These terms are only used for the purpose of distinguishing one component from another.

It is understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, but other elements may exist in the middle. It should be. On the other hand, when an element is referred to as “directly connected” or “directly connected” to another element, it should be understood that no other element exists in the middle.

1 is a diagram schematically illustrating an orthodontic appliance generating system 1000 .

Referring to FIG. 1 , the orthodontic appliance generating system 1000 scans the internal structure of the oral cavity of a user (eg, a person to be treated, a person to be treated, etc.), and designs an orthodontic appliance to be applied to a dentition formed by a plurality of teeth. and can create (produce) designed orthodontic appliances.

The orthodontic appliance generating system 1000 includes an intraoral scanner 10 for photographing the inside of a person's oral cavity, an orthodontic appliance design device 100 for designing an orthodontic appliance using a bracket and a wire, and an orthodontic appliance according to a design drawing. It may include a 3D (3 Dimension) printer 20 that generates. Through the 3D printer 20, the orthodontic appliance may be output.

Here, the dentition means an arrangement of a plurality of teeth in the oral cavity, but may also be used to express a plurality of teeth. In addition, orthodontic treatment may be performed not only to correct a simple disorder of the teeth, but also to correct various malocclusions.

The intraoral scanner 10 is a photographing device for photographing teeth and biological tissues in the oral cavity, scans a tooth structure using a light source, and may provide scanned data to the orthodontic appliance design device 100.

The orthodontic appliance designing device 100 may provide an orthodontic appliance design environment to a worker (eg, a dentist or dental engineer), and may provide a program-based orthodontic appliance design method.

In the first embodiment, the orthodontic appliance design device 100 provides an oral image of a user (a person to be treated, a person to be treated, etc.) photographed by the intraoral scanner 10 to a connected display, and the operator directly directs the orthodontic appliance. can be used to determine whether a user needs it. In addition, the operator can decide whether to perform labial or lingual correction.

In this case, the orthodontic appliance designing device 100 displays a user interface for arranging brackets to be fixed to teeth and arranging wires necessary for connection between adjacent brackets on a display connected thereto when an operator intends to design an orthodontic appliance. can provide

In the second embodiment, the orthodontic appliance designing device 100 may perform various decisions without the operator or provide the operator with helpful decisions. For example, the orthodontic appliance design device 100 may analyze the intraoral image collected from the intraoral scanner 10 to determine whether or not orthodontic correction of the user is required, and based on pre-stored analysis data information, labial You can decide whether to perform correction or lingual correction.

In this case, the orthodontic appliance designing device 100 may determine a dental segment requiring orthodontic correction, determine the type of bracket used for orthodontic treatment, the bracket fixing position on the tooth, the angle of placement of the bracket, and the like, and determine the adjacent bracket It is possible to determine the type, strength, thickness, and coupling position of wires connecting the wires.

In addition, the orthodontic appliance designing device 100 provides design information of the orthodontic appliance, which is virtually generated, to the 3D printer 20, and the 3D printer 20 may output the orthodontic appliance in three dimensions.

2 is a block diagram showing the configuration of an apparatus 100 for designing an orthodontic appliance according to an embodiment of the present invention.

Referring to FIG. 2 , the orthodontic appliance design device 100 may provide a program for arranging and fixing a bracket constituting the orthodontic appliance and a wire connecting between the brackets to the operator, the orthodontic appliance design device ( 100 may include a display 130 , a memory 150 and one or more processors 190 .

The display 130 may be implemented with various light emitting materials, and may output and provide image data or necessary information in the course of designing an orthodontic appliance.

The memory 150 is electrically connected to the processor 190 and may store at least one code executed by the processor. The code may include not only machine code generated by a compiler but also high-level language code that can be executed by a computer using an interpreter or the like.

Memory 150 may store code that, when executed via processor 190, causes processor 190 to perform one or more operations or functions. Hereinafter, this will be described in detail.

First, the processor 190 may obtain an oral cavity image in which a row formed by a plurality of teeth is expressed. The image of the inside of the oral cavity may be an image of the inside of the mouth of a user (eg, a person subject to treatment, a person to be treated, etc.) captured using an oral scanner. The processor 190 may output an image of the inside of the oral cavity to the display 130 .

When an image of the inside of the oral cavity is obtained, the processor 190 may arrange a bracket for orthodontic treatment in a predetermined region of each of at least some of the plurality of teeth.

The dentition may be used to refer to all of the user's teeth, and may be used when there are two or more teeth. A bracket is a fixture placed on a tooth, and may include a material such as metal, ceramic, or resin, and a wire may be implemented in a penetrating type or a self-ligating type, but embodiments are not limited thereto.

In the first embodiment, the processor 190 may place brackets on the teeth on the display 130 according to the operator's selection. That is, the processor 190 may provide an environment in which the operator directly places the bracket implemented on the display 130 on the teeth in a direct drag-and-drop manner.

In the second embodiment, the processor 190 may automatically place brackets on the user's teeth based on the bracket placement model previously learned in the memory 150 . Specifically, the bracket placement model can provide information on the type of bracket and the position of the bracket to be fixed on the tooth (Bracket Point) based on gender, age, dental arrangement shape, etc., and automatically fix the set bracket to the tooth. can do. The bracket placement model may be a supervised learning model by a neural network-based algorithm.

To this end, the processor 190 uses label information such as gender, age, alignment shape of teeth, time of orthodontic treatment, bracket type, bracket placement angle, orthodontic pain information, orthodontic period, etc. Brackets may be placed on teeth based on the learned bracket placement model.

After disposing the brackets, the processor 190 may dispose wire segments extensible in both directions based on the wire fixing points of the brackets. The wire fixing point is the point where the wire is fixed to the bracket.

In the first embodiment, the processor 190 may place the wire segment on the bracket according to the operator's choice. That is, the processor 190 provides only a user interface for arranging the wire segments, and the length, position, angle, etc. of the wire segments may be determined by the operator.

In the second embodiment, the processor 190 may place the wire segment on the bracket itself. The processor 190 may place the wire segment on the bracket based on the type of wire, the phase (direction) of bracket placement, the user's age, gender, dental alignment information, and the like, based on the wire placement model.

To this end, the processor 190 provides label information on the existing sex, age, alignment shape of the teeth, time of orthodontic treatment, type of bracket, bracket placement angle, orthodontic pain information, duration of orthodontic treatment, and type of wire. Based on the wire arrangement model learned using , wire segments may be placed on the bracket.

Also, the processor 190 may determine location information and a passing angle through which the wire passes (passes) on the bracket.

Also, the processor 190 may virtually complete the orthodontic appliance through coupling between adjacent wire segments.

In a first embodiment, the processor 190 may perform coupling between wire segments based on a worker's work skill.

In the second embodiment, the processor 190 determines the adjacent data based on interval (distance) information of wire segments, angle information of wire segments, age information, gender information, dental arrangement information (eg, expressed as a 3D curve), and the like. Wires can be connected automatically.

To this end, the processor 190 includes existing sex, age, alignment of the teeth, time of orthodontic treatment, type of bracket, wire placement information, bracket placement angle, orthodontic pain information, orthodontic period, and wire placement information. The orthodontic appliance may be virtually completed based on the wire combination model learned using the label information on the type. A wire combination model can also be trained with a neural network algorithm based on supervised learning.

As an optional embodiment, the processor 190 may predict a degree of change of the teeth over time and output the result to the display 130 after the completed orthodontic appliance is mounted on the teeth. To this end, the processor 190 may predict the degree of change of the dentition over time based on case information applied to various users.

3A to 3C are views for explaining a method of arranging brackets on teeth on a screen according to an embodiment of the present invention.

First, in a state in which a plurality of teeth T, T1 to T4 form a row of teeth, the processor 190 of the orthodontic appliance design device 100 connects the bracket via points P and P1 to the teeth T1 to T4 to be aligned. ~P4) can be set.

The processor 190 may arrange the brackets B and B1 to B4 on the teeth to be aligned T1 to T4, respectively. At this time, the processor 190 may place brackets on the teeth on a three-dimensional basis. If the fourth bracket (B4) is described as an example, the fourth bracket (B4) is 3 according to the bonding surface of the tooth (T4). The phase may vary dimensionally.

As an optional embodiment, the processor 190 may estimate whether or not correction is required for a specific dental arch, based on a dental arch information label of an existing user, and may estimate whether or not calibration is required for a specific dental arch.

4A to 4C are diagrams for explaining a process of arranging and processing wires connecting brackets to each other on a screen.

The processor 190 may place the wire segments W1 to W4 on each of the brackets B1 to B4. At this time, taking the fourth bracket B4 as an example, the fourth wire W4 can extend in both directions based on the wire fixing point W4F of the fourth bracket B4, and the fourth wire W4 ) may be disposed to pass through the upper and lower surfaces B4a and B4b of the fourth bracket B4 and the wire fixing point W4F. Here, the phase of the wire segment (W4) may vary according to the coupling position of the bracket (B4).

The processor 190 may set processing points W1a, W2a, W2b, W3a, W3b, and W4a of each wire W1 to W4.

The processor 190 may finally form a wire WW by combining processing points of adjacent wire segments with each other. An end of the wire WW may be appropriately fixed to a tooth or bracket.

As an optional embodiment, when determining the processing point of the wire segment, the processor 190 may reversely determine the processing point of the wire segment based on the completed wire WW of FIG. 4C . To this end, the processor 190 includes existing sex, age, alignment of the teeth, time of orthodontic treatment, type of bracket, wire placement information, bracket placement angle, orthodontic pain information, orthodontic period, and wire placement information. After determining the wire WW based on the label information considering at least one of the types, a processing point of the wire segment may be determined.

5 is a sequence diagram illustrating a method for designing an orthodontic appliance according to an embodiment of the present invention. Each of the steps below may be performed by the processor 190 of the orthodontic appliance designing device 100 .

First, the orthodontic appliance designing device may obtain an image of the inside of the oral cavity in which a row formed by a plurality of teeth is expressed (S710).

Next, the orthodontic appliance designing device may place a bracket for orthodontic correction in a predetermined region of each of at least some of the plurality of teeth (S720).

In the first embodiment, the orthodontic appliance designing device may provide an image of the inside of the oral cavity of a user (a person to be treated, a person to be treated, etc.) captured by an intraoral scanner to a display. The orthodontic appliance designing device may provide an environment for an operator to determine whether an orthodontic appliance is necessary for a user (subject to be operated on). In addition, the operator can decide whether to perform labial or lingual correction.

In this case, the orthodontic appliance designing apparatus may provide a user interface for arranging brackets fixed to teeth and arranging wires required for connection between adjacent brackets when a worker designs an orthodontic appliance.

That is, the orthodontic appliance designing device may arrange the bracket, arrange the wire segments, and perform coupling between adjacent wire segments based on the operator's selection command.

In the second embodiment, the orthodontic appliance designing device may perform various determinations by itself. The orthodontic appliance designing device 100 may analyze the intraoral image collected from the intraoral scanner to determine whether orthodontic correction of the user is necessary. Also, the orthodontic appliance virtual design device may determine whether to perform labial or lingual correction based on pre-stored analysis data information.

In addition, the orthodontic appliance design device may determine a dental section requiring orthodontic treatment, determine the type of bracket used for orthodontic treatment, a fixed position, and an angle of placement of the bracket, the type of wire connecting adjacent brackets, The strength, thickness, and bonding position between wires can be determined.

Next, the orthodontic appliance designing device may place wire segments extensible in both directions based on the wire fixing point of each bracket (S730).

Finally, the orthodontic appliance designing device may virtually complete the orthodontic appliance through coupling between adjacent wire segments (S740).

Here, the processor of the orthodontic appliance designing device may be configured to virtually complete the orthodontic appliance by using a neural network-based learning model of at least one of a pre-learned bracket arrangement model, wire arrangement model, and wire combination model.

The present disclosure described above can be implemented as computer readable codes in a medium on which a program is recorded. The computer-readable medium includes all types of recording devices in which data that can be read by a computer system is stored. Examples of computer-readable media include Hard Disk Drive (HDD), Solid State Disk (SSD), Silicon Disk Drive (SDD), ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, etc. there is Also, the computer may include a processor of each device.

On the other hand, the program may be specially designed and configured for the present disclosure, or may be known and usable to those skilled in the art in the field of computer software. Examples of programs may include not only machine language codes generated by a compiler but also high-level language codes that can be executed by a computer using an interpreter or the like.

In the specification of the present disclosure (particularly in the claims), the use of the term "above" and similar indicating terms may correspond to both singular and plural. In addition, when a range is described in the present disclosure, as including the invention to which individual values belonging to the range are applied (unless otherwise stated), each individual value constituting the range is described in the detailed description of the invention Same as

Unless an order is explicitly stated or stated to the contrary for steps comprising a method according to the present disclosure, the steps may be performed in any suitable order. The present disclosure is not necessarily limited to the order of description of the steps. The use of all examples or exemplary terms (eg, etc.) in this disclosure is simply to explain the present disclosure in detail, and the scope of the present disclosure is limited due to the examples or exemplary terms unless limited by the claims. it is not going to be In addition, those skilled in the art can appreciate that various modifications, combinations and changes can be made according to design conditions and factors within the scope of the appended claims or equivalents thereof.

Therefore, the spirit of the present disclosure should not be limited to the above-described embodiments and should not be determined, and all ranges equivalent to or equivalently changed from the claims as well as the claims described below are within the scope of the spirit of the present disclosure. will be said to belong to

Claims

A method of designing an orthodontic appliance performed by a processor, comprising:

Obtaining an oral cavity image in which a row formed by a plurality of teeth is expressed;

arranging a bracket for orthodontic treatment in a predetermined region of each of at least some of the plurality of teeth;

arranging wire segments extensible in both directions based on the wire fixing points of the brackets; and

An orthodontic appliance design method comprising the step of virtually completing an orthodontic appliance through coupling between adjacent wire segments.
According to claim 1,

The orthodontic appliance design method, wherein the bracket is disposed, the wire segment is disposed, and coupling between adjacent wire segments is performed based on an operator's selection command.
According to claim 1,

the processor,

An orthodontic appliance design method configured to virtually complete the orthodontic appliance by using a neural network-based learning model of at least one of a pre-learned bracket placement model, a wire placement model, and a wire combination model.
As a device for designing an orthodontic appliance,

one or more processors; and

A memory electrically connected to the processor and storing at least one code executed by the processor,

When the memory is executed by the processor, when an oral cavity image in which a row formed by a plurality of teeth is expressed is acquired, the processor sets a bracket for orthodontic treatment to a predetermined area of each of at least some of the plurality of teeth. Arrange, arrange wire segments that can be extended in both directions based on the wire fixing points of each of the brackets, and store a code that causes the orthodontic appliance to be virtually completed through coupling between adjacent wire segments. design device.
According to claim 4,

the processor,

An orthodontic appliance designing device configured to virtually complete the orthodontic appliance by using a neural network-based learning model of at least one of a pre-learned bracket arrangement model, a wire arrangement model, and a wire combination model storable in the memory.