KR101888361B1 - Method and device for designing a inlay/onlay model, and recording medium recorded program for implement thereof - Google Patents

Abstract

An apparatus for automatically generating margin lines to design an inlay / on-lay model is disclosed.
An apparatus for designing an inlay / onlay model according to an embodiment of the present invention includes a processor, which loads a tooth model for designing an inlay / onlay model from a tooth model library and combines the inlay / To be placed in the abutment model. Then, the processor can superimpose the placed tooth model on the abutment model to determine the margin at which the abutment model touches the portion having a large curvature change on the surface of the tooth model as a margin line. In addition, the processor can design the crown model by determining the inner surface model and the outer surface model of the inlay / onlay model using the determined margin line.

Description

TECHNICAL FIELD [0001] The present invention relates to an inlay / on-lay model design method, an apparatus, and a recording medium on which a program for executing the method is recorded.

The present invention relates to a method and apparatus for designing an inlay / onlay model, and more particularly, to a method and apparatus for designing an inlay / onlay model using an abutment model and a tooth model without generating a margin line On-a-lay model by automatically generating a margin line.

Recently, dental prosthesis design using dental CAD software has been actively made, not by hand by dental technician, for dental prosthesis design for dental treatment. When dental prosthesis is manufactured using Dental CAD software, it is possible to design the prosthesis more precisely and faster than the manual work of the dental technician.

However, to design a dental prosthesis using Dental CAD software, the margin line must be determined prior to designing the dental prosthesis model.

Conventionally, a method of generating a margin line based on a point input by a user using an input device such as a mouse is used to determine a margin line. However, in this case, an error may occur due to the position or shape of the margin line depending on the point input by the user, and in some cases, it is inconvenient for the user to edit and correct the generated margin line manually Lt; / RTI >

The present invention can provide a method and an apparatus capable of automatically arranging a margin line by arranging a tooth model retrieved from a tooth library in an abutment model obtained from a user's tooth and superimposing the tooth model on the abutment model.

The present invention relates to a method of designing an inlay / on-lay model by using a tooth model retrieved from a tooth library, an abutment value model acquired from a user's tooth, and a margin model created by superimposing a tooth model disposed on an abutment model on an abutment model And apparatus.

An inlay / onlay model design method according to an embodiment of the present invention includes: identifying a tooth model for designing an inlay / onlay model from a tooth model library; Placing the tooth model on an abutment tooth model to which the inlay / onlay model is to be joined; Determining a margin line by superimposing the tooth model on an abutment model; Determining an inner surface model of the inlay / onlay model using the determined margin line and the abutment model; And determining an outer surface model of the inlay / on-lay model using the tooth model and the inner surface model.

The step of determining the margin line according to an embodiment of the present invention includes: superposing the tooth model on the abutment model; Determining a point at which a change in curvature in the tooth model superimposed on the abutment tooth model is equal to or greater than a predetermined value; And determining the margin line using the determined point.

The step of determining the inner surface model according to an embodiment of the present invention includes: cutting the abutment model along the margin line; And adjusting at least one of a size of the cut abutment model or a size of the tooth model by a predetermined offset in order to secure an adhesion space between the inlay / onlay model and the cut abutment model .

The step of determining the outer surface model according to an embodiment of the present invention includes the steps of: deforming an edge of the tooth model in accordance with an edge of the inner surface model; And determining the shape of the tooth model in which the edge has been deformed based on the user's input.

An inlay / onlay model design apparatus in accordance with an embodiment of the present invention includes a processor that identifies a tooth model for designing an inlay / onlay model from a tooth model library The tooth model is placed on an abutment tooth model to which the inlay / on-ray model is to be coupled, the marine line is determined by superimposing the tooth model on an abutment model, and the abutment line model and the abutment model are used And determining an inner surface model of the inlay / onlay model, and determining an outer surface model of the inlay / onlay model using the tooth model and the inner surface model.

The processor according to an embodiment of the present invention may be configured such that the tooth model is superimposed on the abutment tooth model, a point at which a change in curvature in the tooth model superimposed on the abutment model is greater than or equal to a preset value, The margin line can be determined.

The processor according to an embodiment of the present invention cuts the abutment value model along the margin line and cuts the abutment model by a preset offset amount to secure a bonding space between the inlay / At least one of the size of the cut abutment model or the size of the tooth model can be adjusted.

The processor according to an embodiment of the present invention may modify an edge of the tooth model in accordance with an edge of the inner surface model and determine a shape of the tooth model in which the edge is deformed based on a user's input.

According to an embodiment of the present invention, a tooth model retrieved from a tooth library can be arranged in an abutment value model obtained from a user's tooth, and a margin line can be automatically generated by adjusting the size of the tooth model.

The present invention can design an inlay / on-ray model by using a tooth model imported from a tooth library, an abutment value model acquired from a user's tooth, and a margin line automatically generated by adjusting the size of a tooth model disposed in the abutment model .

1 is a view showing an inlay / on-lay model design apparatus according to an embodiment of the present invention.
2 is a flowchart illustrating an inlay / on-ray model design method according to an embodiment of the present invention.
FIG. 3 is a view showing an abutment model, an inlay / on-ray model, and a margin line according to an embodiment of the present invention.
FIG. 4 is a diagram showing placement of a tooth model in an abutment tooth model according to an embodiment of the present invention.
5 is a diagram illustrating superimposing a tooth model on an abutment model according to an embodiment of the present invention.
FIG. 6 is a diagram showing cutting of an abutment model according to an embodiment of the present invention along a margin line. FIG.
FIG. 7 illustrates adjusting the size of an abutment model according to an embodiment of the present invention.
8 is a view showing merging of an inner surface model and a tooth model according to an embodiment of the present invention.
9 is a diagram illustrating determining the shape of an inlay / on-lay model according to an embodiment of the present invention.

The present invention is an invention for designing a prosthesis using Dental CAD software, in particular, an inlay / onlay.

The inlay according to the present invention is a filling material used for restoring a tooth when a tooth cavity is formed in a local area inside the tooth. And onlay is a filling material used to repair teeth when more than 60% of all teeth have been dented.

The inner surface model in the present invention is a model for the portion where the abutment of the user and the inlay / onlay abut.

The outer surface model in the present invention is a model for a portion of the inlay / onlay that is visible to the outside when the inlay / onlay is coupled to the abutment of the user.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view showing an inlay / on-lay model design apparatus according to an embodiment of the present invention.

The inlay / on-ray model design apparatus according to an embodiment of the present invention includes a processor, which may be a central processing unit (CPU) or a semiconductor device that performs processing on instructions stored in memory and / or storage . The processor of the inlay / on-lay model design apparatus 100 determines a margin line using the tooth model acquired from the teeth of the user and the teeth model retrieved from the tooth library, You can design an inlay / onlay to be bonded to the abutment.

At this time, the abutment model is a three-dimensional digital model of the user's tooth to which the inlay / onlay is to be coupled, and can be obtained from the user's teeth through a digital device such as a mouth scanner or a model scanner. The tooth model is a three-dimensional digital model of a standardized tooth shape. In addition, the margin line is a line formed by contacting the abutment teeth and the inlay / onlay.

2 is a flowchart illustrating an inlay / on-ray model design method according to an embodiment of the present invention.

In step 200, the processor of the inlay / on-ray model design apparatus 100 may load the tooth model from the tooth library to design the inlay / onlay model to be coupled to the abutment model.

In step 201, the processor of the inlay / on-ray model design apparatus 100 may place the tooth model retrieved from the tooth library in an abutment model to which the inlay / onlay model is to be coupled. At this time, as a method of disposing the tooth model, a tooth model may be placed in the abutment model based on the user's input considering the size and orientation of the abutment model, or the tooth model may be automatically placed in the abutment model .

In step 202, the processor of the inlay / on-ray model design device 100 may determine the margin line by superimposing the tooth model on the abutment model. More specifically, the processor may cause the tooth model disposed in the abutment model to approach the abutment model to form the same surface. In this process, the processor can detect a point where the curvature suddenly changes beyond a predetermined value on the surface of the tooth model, and prevent further overlap with the point. Then, the boundary between the overlapped tooth model and the abutment tooth model can be determined as a margin line.

The processor can determine the final margin line by compensating for the portion where the margin line is not formed by using the curvature of the periphery when there is a portion cut in the determined margin line, that is, when there is a portion where the margin line is not generated .

The processor of the inlay / on-ray model design apparatus 100 in step 203 may determine the in-plane model of the inlay / on-lay model using the final margin line and the abutment model determined in step 202.

More specifically, the processor can cut the abutment model along the determined margin line. In addition, the processor can adjust either the size of the abutment tooth model or the size of the tooth model cut by a predetermined offset in order to secure a space for adhesion between the inlay / on-ray model and the cut abutment model, The cut abutment model may be the inner model of the inlay / onlay model.

The processor of the inlay / onlay model design apparatus 100 in step 204 may determine an exterior model of the inlay / onlay model using the inner surface model and the tooth model of the inlay / onlay model determined in step 203 .

More specifically, the processor can merge the inner surface model and the tooth model into a single mesh model by modifying the edge of the tooth model in accordance with the edge of the inner surface model. Then, the processor can determine the final inlay / onlay model by determining the outer surface model of the inlay / onlay model through a deformation operation that polishes and arranges the shape of the tooth model based on the user's input.

FIG. 3 is a view showing an abutment model, an inlay / on-ray model, and a margin line according to an embodiment of the present invention.

Referring to FIG. 3, an inlay / on-ray model 301 is coupled to an abutment value model 300. At this time, a line formed by abutting the inlay / on-ray model 301 and the abutment model 300 may be a margin line 302.

FIG. 4 is a diagram showing placement of a tooth model in an abutment tooth model according to an embodiment of the present invention.

The processor of the inlay / on-ray model designing apparatus 100 can arrange the tooth model 400 retrieved from the tooth library in the abutment value model 401.

More specifically, the processor may place the tooth model 400 on the abutment model 401 based on the user's input considering the size, orientation, etc. of the abutment model 401, or place the buccal axis, occlusal axis, The tooth model 400 can be automatically arranged in the abutment model using a preset algorithm using the abutment. At this time, the algorithm used by the processor may not be limited to a specific algorithm.

Here, the abutment value model 401 is a model for a tooth to which an inlay / on-ray model is to be coupled, and can be acquired from a user's tooth using digital equipment such as an oral scanner. In particular, the abutment model 401 may be used to design an inner surface model of the inlay / onlay model. In addition, the tooth model 400 disposed in the abutment value model 401 can be used as a three-dimensional digital model of a standardized tooth shape to design an inlay / on-ray model. In particular, the tooth model 400 may be used to design an exterior model of an inlay / on-lay model.

5 is a diagram illustrating superimposing a tooth model on an abutment model according to an embodiment of the present invention.

The processor of the inlay / on-lay model design apparatus 100 can determine the margin line by superimposing the tooth model 400 disposed on the abutment value model 401 on the abutment model 401. [

More specifically, the processor can superpose the tooth model 400, which is larger than the abutment model 401 in Fig. 4, on the abutment model 401 as shown in Fig. At this time, a point where the curvature suddenly changes on the surface of the tooth model 400 is generated, and the processor can detect this point so that no further superposition occurs at the point. When the superimposition of the tooth model 400 on the abutment value model 401 is completed, the processor can determine the boundary line between the abutment tooth model 401 and the tooth model 400 as a margin line.

FIG. 6 is a diagram showing cutting of an abutment model according to an embodiment of the present invention along a margin line. FIG.

The processor of the inlay / on-lay model design apparatus 100 is configured to superimpose the tooth model 400 on the abutment model 401 and the abutment model 401 to design an inner model of the inlay / ) Can be used.

More specifically, the processor can determine the abutment model 600 for designing the inner surface model of the inlay / onlay model by cutting the abutment model 401 along the determined margin line 500.

FIG. 7 illustrates adjusting the size of an abutment model according to an embodiment of the present invention.

When the inlay model of the inlay / onlay model is designed the same as the abutment model 600, when the inlay / onlay fabricated on the inlay / onlay model is bonded to the user's teeth, there is no space for the adhesive . Accordingly, the processor of the inlay / on-lay model design apparatus 100 can adjust the size of the abutment model 600 by a preset offset to secure an adhesive space for the adhesive between the inlay / on-ray model and the abutment model 600 , The inner model 700 of the inlay / onlay model can be determined. At this time, the offset may be set differently for each part of the abutment tooth model 600 to fix the prosthesis more stably.

In addition, the processor may adjust the size of the tooth model by a predetermined offset, instead of adjusting the size of the abutment model 600 to secure an adhesive space for the adhesive between the inlay / on-ray model and the abutment model 600 , The inner model of the inlay / onlay model may be determined.

8 is a view showing merging of an inner surface model and a tooth model according to an embodiment of the present invention.

The processor of the inlay / on-lay model design apparatus 100 merges the in-plane model 700 of the inlay / on-ray model and the tooth model 400 into one mesh model to determine the back side model, 800) can be determined.

More specifically, the processor performs a cutting operation on the edge of the inner surface model 700 and the edge of the tooth model 400, and then, based on the edge portion of the inner surface model 700, It is possible to determine the outer surface model of the inlay / on-ray model 800 by extending the inlay model. The edge of the tooth model 400 is the point where the margin line contacts the tooth model 400 and the edge of the inner surface model 700 is the edge of the tooth model 400 and the edge of the tooth model 400. [ Is the point at which the part contacts.

9 is a diagram illustrating determining the shape of an inlay / on-lay model according to an embodiment of the present invention.

The processor of the inlay / on-lay model design apparatus 100 may determine the final inlay / on-lay model 900 from the inlay / onlay model 800 via a deforming operation.

More specifically, the processor performs a deformation operation to trim and organize the form based on the user's input for a particular portion specified by the user in the outer model of the inlay / on-ray model 800, Can be determined.

Meanwhile, the apparatus and method according to the present invention may be embodied as a program that can be executed by a computer, and may be embodied as various recording media such as a magnetic storage medium, an optical reading medium, and a digital storage medium.

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 in a computer program product, e.g., a machine-readable storage device (e.g., a computer readable storage medium), for processing by a data processing apparatus, e.g., a programmable processor, Capable media). 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, and may be stored as a stand-alone program or in a module, component, subroutine, As other units suitable for use in the present invention. A computer program may be deployed to be processed on one computer or multiple computers at one site or distributed across multiple sites and interconnected by a communications network.

Processors suitable for processing a computer program include, by way of example, both general purpose and special purpose microprocessors, and any one or more processors of any kind of digital computer. Generally, a processor will receive instructions and data from a read-only memory or a random access memory or both. The elements of a computer may include at least one processor for executing instructions and one or more memory devices for storing instructions and data. Generally, a computer may include one or more mass storage devices for storing data, such as magnetic, magneto-optical disks, or optical disks, or may receive data from them, transmit data to them, . ≪ / RTI > Information carriers suitable for embodying computer program instructions and data include, for example, semiconductor memory devices, for example, magnetic media such as hard disks, floppy disks and magnetic tape, compact disk read only memory A magneto-optical medium such as a floppy disk, an optical disk such as a DVD (Digital Video Disk), a ROM (Read Only Memory), a RAM , Random Access Memory), a flash memory, an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), and the like. The processor and memory may be supplemented or included by special purpose logic circuitry.

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

Likewise, although the operations are depicted in the drawings in a particular order, it should be understood that such operations must be performed in that particular order or sequential order shown to achieve the desired result, or that all illustrated operations should be performed. In certain cases, multitasking and parallel processing may be advantageous. Also, the separation of the various device components of the above-described embodiments should not be understood as requiring such separation in all embodiments, and the described program components and devices will generally be integrated together into a single software product or packaged into multiple software products It should be understood.

It should be noted that the embodiments of the present invention disclosed in the present specification and drawings are only illustrative of specific examples for the purpose of understanding and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

100: Inlay / on-ray model design device

Claims (9)

An inlay / onlay model design method performed by an inlay / onlay model design apparatus including a processor,
Identifying a tooth model for designing an external model of an Inlay / Onlay model from the tooth model library;
The processor placing the tooth model in an abutment model to which the inlay / onlay model is to be coupled, the abutment model being obtained from the user's teeth through digital equipment and for designing an internal model of the inlay / Model -;
The processor superposing the tooth model on the abutment model, determining a point at which a change in curvature of the tooth model overlaps the abutment model is greater than a predetermined value, and determining a margin line using the determined point;
The processor cutting the abutment model along the margin line to determine an inner surface model of the inlay / onlay model; And
The processor modifies the edge of the tooth model in accordance with the edge of the inner surface model of the inlay / on-lay model and merges the inner surface model of the inlay / on-ray model and the tooth model of which the edge is deformed into one mesh model Determining an outer surface model of the inlay / onlay model
/ RTI >< Desc / Clms Page number 12 > delete The method according to claim 1,
Wherein the step of determining the inner surface model comprises:
Adjusting at least one of the size of the cut abutment tooth model or the size of the tooth model by a predetermined offset in order to secure a bonding space between the inlay / on-ray model and the cut abutment model,
/ RTI >< Desc / Clms Page number 12 > The method according to claim 1,
The step of determining the outer surface model comprises:
Determining a shape of the tooth model in which the edge is deformed based on a user's input
/ RTI >< Desc / Clms Page number 12 > 1. An inlay / on-lay model design apparatus,
A processor,
The processor comprising:
To identify tooth models for designing an external model of an inlay / onlay model from a tooth model library,
Placing the tooth model on an abutment model to which the inlay / onlay model is to be coupled, the abutment model being a model for designing an internal model of the inlay / onlay model, obtained through digital equipment from the user's teeth,
The tooth model is superimposed on the abutment model, a point at which the change in curvature is greater than or equal to a preset value in the tooth model superimposed on the abutment value model is determined, a margin line is determined using the determined point,
Determining an inner surface model of the inlay / on-lay model by cutting the abutment tooth model along the margin line,
On-the-fly model is modified in accordance with the edge of the inner surface model of the inlay / on-lay model, and the inner surface model of the inlay / on-ray model and the tooth model of which the edge is deformed are merged into one mesh model, / Inlay / onlay model design device that determines the exterior model of the onlay model. delete 6. The method of claim 5,
The processor comprising:
Adjusting at least one of the size of the cut abutment tooth model or the size of the tooth model by a preset offset in order to secure a space for bonding the inlay / on-ray model and the cut abutment model
Inlay / onlay model design device. 6. The method of claim 5,
The processor comprising:
Based on the input of the user, determines the shape of the tooth model in which the edge is deformed
Inlay / onlay model design device. A computer-readable recording medium on which a program for executing the method according to any one of claims 1, 3, and 4 is recorded.

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