WO2024085341A1 - Procédé d'évaluation tridimensionnelle pour prothèse dentaire intelligente - Google Patents

Procédé d'évaluation tridimensionnelle pour prothèse dentaire intelligente Download PDF

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Publication number
WO2024085341A1
WO2024085341A1 PCT/KR2023/008586 KR2023008586W WO2024085341A1 WO 2024085341 A1 WO2024085341 A1 WO 2024085341A1 KR 2023008586 W KR2023008586 W KR 2023008586W WO 2024085341 A1 WO2024085341 A1 WO 2024085341A1
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prosthesis
scan data
smart
data
evaluation method
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PCT/KR2023/008586
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English (en)
Korean (ko)
Inventor
유승민
유승규
전진훈
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주식회사 에코앤리치
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Priority claimed from KR1020220136095A external-priority patent/KR102495429B1/ko
Priority claimed from KR1020220136094A external-priority patent/KR102495430B1/ko
Application filed by 주식회사 에코앤리치 filed Critical 주식회사 에코앤리치
Publication of WO2024085341A1 publication Critical patent/WO2024085341A1/fr

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B18/00—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body
    • A61B18/18—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves
    • A61B18/20—Surgical instruments, devices or methods for transferring non-mechanical forms of energy to or from the body by applying electromagnetic radiation, e.g. microwaves using laser
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
    • A61B34/10—Computer-aided planning, simulation or modelling of surgical operations
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C9/00—Impression cups, i.e. impression trays; Impression methods
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T1/00—General purpose image data processing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T17/00—Three dimensional [3D] modelling, e.g. data description of 3D objects
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T19/00—Manipulating 3D models or images for computer graphics
    • G06T19/20—Editing of 3D images, e.g. changing shapes or colours, aligning objects or positioning parts
    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
    • G16H30/00—ICT specially adapted for the handling or processing of medical images
    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
    • G16H50/00—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics
    • G16H50/50—ICT specially adapted for medical diagnosis, medical simulation or medical data mining; ICT specially adapted for detecting, monitoring or modelling epidemics or pandemics for simulation or modelling of medical disorders

Definitions

  • the present invention evaluates accuracy by overlapping and analyzing 3D design data and scan data of the prosthesis in the process of manufacturing a removable prosthesis installed in the patient's oral cavity or a fixed prosthesis installed on the abutment tooth of a patient with missing teeth, and compares the removable prosthesis and the patient.
  • This relates to a three-dimensional evaluation method of a smart dental prosthesis for evaluating the suitability of the inner space between the palate of the mouth or the inner space to be bonded by cement between a fixed prosthesis and a patient's abutment tooth in a three-dimensional overlapping manner.
  • dental prosthesis is for prosthetic treatment that uses artificial materials to replace the role of teeth in areas where teeth are lost.
  • Dental prosthesis includes fixed prosthesis, a type of partial denture, or removable prosthesis, commonly referred to as dentures. This is a representative example.
  • the 3D overlapping analysis method evaluates the manufacturing accuracy of the prosthesis by overlapping and analyzing the 3D design data of the prosthesis and the 3D scan data of the manufactured prosthesis, and also evaluates the manufacturing accuracy of the prosthesis manufactured by 3D design data.
  • the suitability of the inner surface of the prosthesis must be evaluated by comparing the 3D internal scan data with the patient's 3D intraoral scan data.
  • the present invention is intended to solve the conventional problems.
  • 3D design data is edited and stored for each area to be overlaid and analyzed, and 3D scan data of the prosthesis is also stored as the stored 3D design data.
  • the purpose is to edit, save, and use it according to the parts of the body.
  • the present invention allows 3D oral scan data to be edited and stored for each area to be overlaid and analyzed to evaluate the suitability of the inner spacing of the prosthesis, and 3D prosthesis scan data is also edited to fit the area of the stored 3D oral scan data.
  • the purpose is to store and utilize it.
  • the purpose of the present invention is to utilize a move/transform sorting algorithm that performs overlapping based on an arbitrary sorting point when overlapping 3D data using a 3D overlapping program.
  • the purpose of the present invention is to spray and apply a scanning spray positioned at a certain distance while rotating the prosthesis, which is a scan target, on a rotating plate.
  • the present invention includes the steps of generating three-dimensional design data for manufacturing a prosthesis; editing the 3D design data for each part to be overlapped and analyzed; generating 3D scan data by 3D scanning the prosthesis manufactured based on the 3D design data; editing the 3D scan data for each area to be overlapped and analyzed;
  • a 3D evaluation method of a smart dental prosthesis comprising the step of evaluating the accuracy of prosthesis production by overlapping and analyzing edited 3D design data and edited 3D scan data using 3D overlapping/analysis software. provides.
  • the present invention includes the steps of generating 3D oral scan data by 3D scanning the area where the prosthesis is installed in the patient's mouth; editing the 3D oral scan data for each area to be overlaid and analyzed; generating 3D prosthesis scan data by 3D scanning the inner surface of the manufactured prosthesis; editing the 3D prosthesis scan data for each area to be overlaid and analyzed; Smart dentistry comprising the step of overlapping and analyzing the edited 3D intraoral scan data and the edited 3D prosthesis scan data using 3D overlap/analysis software to evaluate the suitability of the inner space for prosthesis installation. Provides a 3D evaluation method for prosthetics.
  • 3D design data and 3D scan data are edited, stored, and utilized for each area to be overlapped and analyzed, thereby simplifying data overlap and improving the reliability of accuracy evaluation.
  • the overlapping is performed based on an arbitrary alignment point, which has the effect of significantly reducing errors that occur during overlapping.
  • the particle uniformity of the scanning spray has a constant effect.
  • Figure 1 is a flowchart of a 3D evaluation method for a smart dental prosthesis according to an embodiment of the present invention, showing the flow of the 3D accuracy evaluation method.
  • Figure 2 is an example of editing 3D design data in the structure of Figure 1.
  • Figure 3 is an example diagram of a 3D scanning process in the structure of Figure 1.
  • Figure 4 is an example of editing 3D scan data in the structure of Figure 1.
  • Figure 5 is an example of the use of 3D superimposition/analysis software in the configuration of Figure 1.
  • Figures 6 to 8 are exemplary diagrams of implementations of the movement/transformation algorithm in the structure of Figure 1.
  • Figure 9 is a flowchart of a 3D evaluation method for a smart dental prosthesis according to another embodiment of the present invention, showing the flow of the 3D suitability evaluation method.
  • Figure 10 is an example of editing 3D oral scan data in the structure of Figure 9.
  • Figure 11 is an example diagram of a 3D scanning process in the structure of Figure 9.
  • FIG. 12 is an example of editing 3D prosthesis scan data in the configuration of FIG. 9.
  • Figure 13 is an example of the use of 3D superimposition/analysis software in the configuration of Figure 9.
  • Figures 14 to 16 are exemplary diagrams of the movement/transformation algorithm in the structure of Figure 9.
  • the 3D evaluation method of a smart dental prosthesis according to an embodiment of the present invention corresponds to a method of evaluating 3D accuracy.
  • a 3D evaluation method of a smart dental prosthesis according to an embodiment of the present invention includes (S1) generating 3D design data for manufacturing a prosthesis; (S2) editing the 3D design data for each part to be overlapped and analyzed; (S3) generating 3D scan data by 3D scanning the prosthesis manufactured based on the 3D design data; (S4) editing the 3D scan data for each area to be overlapped and analyzed; (S5) It includes the step of evaluating the accuracy of prosthesis production by overlapping and analyzing the edited 3D design data and edited 3D scan data using 3D overlapping/analysis software.
  • step (S1) 3D design data for manufacturing a prosthesis corresponding to the treatment target area of the patient is designed and generated using 3D shape modeling software.
  • the 3D design data generated here is a 3D shape model for manufacturing any one of a removable prosthesis, a fixed prosthesis, or a denture.
  • step (S2) when 3D design data for manufacturing any one of a removable prosthesis, fixed prosthesis, or denture is generated, the generated 3D design data is overlapped and analyzed for each area to be analyzed for accuracy evaluation. It is an editing process.
  • step (S2) can be created by editing the inner and outer surfaces of the 3D shape model of the 3D design data, respectively, using dedicated editing software.
  • Figure 2 (a) is a three-dimensional design for manufacturing a removable prosthesis. This shows an example of editing data, and Figure 2(b) shows an example of editing 3D design data for manufacturing a fixed prosthesis (including dentures).
  • step (S3) is a process of scanning the prosthesis manufactured using 3D design data using a 3D scanner to generate 3D scan data, which is a physical shape model of the prosthesis.
  • step (S3) includes (S3-1) fixing the prosthesis on a rotating plate; (S3-2) It further includes spraying the scanning spray onto the prosthesis from a certain distance while the rotary plate rotates.
  • the rotary plate 11 is operated to rotate the prosthesis 12, and a scan positioned at a certain distance is performed during rotation of the prosthesis 12.
  • a material to minimize scanning errors due to light reflection is uniformly applied to the surface of the prosthesis 12 at a certain thickness.
  • the scan spray can be fixed at a certain distance using a separate fixing device such as a clamp.
  • step (S4) when 3D scan data is generated by scanning the actual prosthesis through a 3D scanner, the shape model is created by matching the generated 3D scan data to the 3D design data edited in step (S2). This is a process of editing and saving each area to be analyzed by overlapping it with 3D design data while ensuring that the boundary line has a minimum thickness, and deleting unnecessary mesh data.
  • mesh data is an unstructured grid of a shape model and is a set of vertices, boundaries, and faces in a two-dimensional or three-dimensional space.
  • step (S4) a 3D shape model of the 3D scan data can be edited and created for each part using dedicated editing software.
  • Figure 4 shows an example of editing scan data of a removable prosthesis
  • Figure 4 (b) Shows an example of editing scan data of a fixed prosthesis (including dentures).
  • step (S5) the 3D design data edited in step (S2) and the 3D scan data edited in step (S4) are overlapped using 3D superimposition/analysis software, and then the alignment result of the overlapped data is calculated.
  • This is a process that evaluates the accuracy of prosthesis production by analyzing the range of errors caused by it.
  • the step (S5) sequentially utilizes the movement/transformation algorithm, best fit algorithm, and total deviation algorithm of the 3D superimposition/analysis software to overlap and analyze the 3D design data and 3D scan data.
  • Figure 5(a) shows an example of overlapping and analysis of a removable prosthesis
  • Figure 5(b) shows an example of overlapping and analysis of a fixed prosthesis.
  • step (S5) includes (S5-1) setting arbitrary alignment points on the 3D design data and 3D scan data using 3D superimposition/analysis software;
  • (S5-4) It further includes the step of evaluating the 3D accuracy of the prosthesis by determining whether the range of error due to the secondary alignment result is less than or equal to a preset value using the total deviation algorithm of the 3D superimposition/analysis software. .
  • step (S5-1) there are four or more arbitrary alignment points set in step (S5-1), and points are selected for each of the 3D design data and 3D scan data so that the 3D design data and 3D scan data overlap each other. Use it as a reference point.
  • the alignment point is, when the prosthesis is a removable prosthesis, the left and right positions of the front margin; And, it can be formed at the left and right positions of the rear edge.
  • the alignment points can be formed at the left and right positions of the labial surface, the center of the lingual surface, and the cusps in the anterior teeth, and the alignment points can be formed in three or more positions of the buccal surface, the center of the lingual surface, and the cusps in the posterior teeth. It can be formed in position.
  • the alignment point can be formed at three or more positions: the buccal surface of one tooth, the center of the lingual surface, and the cusp.
  • the alignment points are selectively formed at the above positions depending on the object of the prosthesis, allowing the movement/transformation algorithm of the 3D superimposition/analysis software to be utilized in response to various prosthetics.
  • the 3D design data and the 3D scan data are overlapped and aligned in step (S5-2) based on the alignment point set in step (S5-1), and the 3D aligned in step (S5-3) Perform final alignment of design data and 3D scan data to prepare for suitability evaluation.
  • the step (S5-4) determines whether the error range of the mutual deviation between the final overlapping aligned 3D design data and the 3D scan data is less than a preset value, and if it is less than the preset value, the prosthesis is installed in the patient's mouth. , If it is more than the preset value, the prosthesis is modified again, and the above-described steps are repeated, and evaluation continues until the mutual error range of the 3D design data and 3D scan data becomes less than the preset value.
  • the value preset in step (S5-4) can be set in ⁇ m units according to the type of prosthesis, the patient's condition, or various other environments.
  • the 3D evaluation method of a smart dental prosthesis corresponds to a method of evaluating 3D suitability.
  • S1 generating 3D intraoral scan data by 3D scanning the area where the prosthesis is installed in the patient's mouth;
  • S2 editing the 3D oral scan data for each area to be overlaid and analyzed;
  • S3 generating 3D prosthesis scan data by 3D scanning the inner surface of the manufactured prosthesis;
  • S4 editing the 3D prosthesis scan data for each area to be overlaid and analyzed;
  • the mounting site of the prosthesis requiring treatment in the patient's oral cavity is scanned using a 3D oral scanner to create a 3D oral cavity that is a shape model of the mounting site in the patient's oral cavity. This is a process that generates scan data.
  • the 3D oral scan data generated here is a 3D shape model of the installation site of a removable prosthesis (complete denture, partial denture) or fixed prosthesis.
  • step (S2) when 3D intraoral scan data for mounting a removable prosthesis or fixed prosthesis is generated, the generated 3D intraoral scan data is overlapped and analyzed for each area to be analyzed to evaluate the suitability of the inner spacing of the prosthesis. It is an editing process.
  • step (S2) is a process of deleting unnecessary mesh data from the 3D shape model of the 3D oral scan data using dedicated editing software, and editing and saving the parts necessary for overlapping and analysis.
  • 10(a) shows an example of editing 3D intraoral scan data for the mounting site of a removable prosthesis (including complete or partial dentures)
  • Figure 10(b) shows an example of editing the mounting site for a fixed prosthesis. This shows an example of editing 3D oral scan data.
  • mesh data is an unstructured grid of a shape model and is a set of vertices, boundaries, and faces in a two-dimensional or three-dimensional space.
  • step (S3) is a process of generating 3D prosthesis scan data, which is a physical shape model of the prosthesis, by scanning the inner surface of the prosthesis manufactured to be mounted on the treatment area in the patient's mouth using a 3D scanner.
  • step (S3) includes (S3-1) fixing the prosthesis on a rotating plate; (S3-2) It further includes spraying the scanning spray onto the prosthesis from a certain distance while the rotary plate rotates.
  • the rotary plate 11 is operated to rotate the prosthesis 12, and while the prosthesis 12 is rotating, the prosthesis 12 is positioned at a certain distance.
  • a scanning spray is sprayed on the prosthesis 12 so that a material to minimize scanning errors due to light reflection is uniformly applied to the surface of the prosthesis 12 at a certain thickness.
  • the scan spray can be fixed at a certain distance using a separate fixing device such as a clamp.
  • step (S4) when 3D prosthesis scan data is generated by scanning the actual prosthesis through a 3D scanner, the generated 3D prosthesis scan data is matched to the 3D oral scan data edited in step (S2).
  • This is a process that ensures that the boundary line of the shape model has a minimum thickness, edits and saves each area to be analyzed by overlapping it with 3D oral scan data, and deletes unnecessary mesh data.
  • step (S4) the 3D shape model of the 3D prosthesis scan data can be edited by inverting and flipping the 3D shape model of the data using dedicated editing software.
  • the 3D prosthesis scan data is obtained by scanning the inner surface of the prosthesis with a 3D scanner, so that the physical shape model of the inner surface of the prosthesis has a concave shape, so inversion using dedicated editing software is required to overlap it with the 3D intraoral scan data.
  • 3D prosthesis scan data whose shape model is inverted by flipping can be appropriately overlapped with the 3D oral scan data edited in step (S2).
  • the step (S4) edits the shape model of the 3D prosthesis scan data and saves it to be used as reference data.
  • Figure 12 (a) is a scan of a removable prosthesis (including complete or partial dentures). This shows an example of editing data, and Figure 12(b) shows an example of editing scan data of a fixed prosthesis.
  • step (S5) the 3D oral scan data edited in step (S2) and the 3D prosthesis scan data edited in step (S4) are overlapped using 3D overlap/analysis software, and then the overlapped data is aligned.
  • This is a process that evaluates the suitability of the inner space where the prosthesis is installed by analyzing the range of error resulting from the results.
  • the step (S5) sequentially utilizes the movement/transformation algorithm, best fit algorithm, and total deviation algorithm of the 3D superimposition/analysis software to overlap and analyze 3D oral scan data and 3D prosthesis scan data.
  • Figure 13 (a) shows an example of overlapping and analysis of a removable prosthesis
  • Figure 13 (b) shows an example of editing scan data of a fixed prosthesis.
  • step (S5) includes (S5-1) setting arbitrary alignment points on the 3D oral scan data and 3D prosthesis scan data using 3D superimposition/analysis software;
  • step (S5-1) there are three or more arbitrary alignment points set in step (S5-1), and points are selected for each of the 3D oral scan data and the 3D prosthesis scan data, so that the 3D oral scan data and the 3D prosthesis scan data are Use it as a reference point for mutual overlap.
  • the alignment point can be formed at two or more locations: the center of the labial or buccal surface, the center of the lingual surface, and the apex.
  • the fixed prosthesis may be formed on the labial surface, buccal surface, and cuspid of the anterior teeth, and the fixed prosthesis may be formed on the buccal surface, lingual surface, and cuspid of the posterior teeth.
  • the alignment point is, in the case of a removable prosthesis (complete denture), the left and right positions of the front margin; And, it can be formed at the left and right positions of the rear edge.
  • the alignment point is, in the case of a removable prosthesis (partial denture), the front left and right positions of the prosthesis; And, it can be formed at the rearmost left and right positions of the prosthesis.
  • the alignment points are selectively formed at the above positions depending on the object of the prosthesis, allowing the movement/transformation algorithm of the 3D superimposition/analysis software to be utilized in response to various prosthetics.
  • the 3D oral scan data and the 3D prosthesis scan data are overlapped and aligned in step (S5-2) based on the alignment point set in step (S5-1), and the aligned data in step (S5-3) are aligned. Perform final alignment of the 3D oral scan data and 3D prosthesis scan data to prepare for fit evaluation.
  • the step (S5-4) determines whether the error range of the mutual deviation between the final overlap-aligned 3D oral scan data and the 3D prosthesis scan data is less than a preset value, and if it is less than the preset value, the prosthesis is placed in the patient's mouth. It is installed, and if it is more than the preset value, the prosthesis is modified again, and the above-described steps are repeated, and evaluation continues until the mutual error range of the 3D intraoral scan data and the 3D prosthesis scan data becomes less than the preset value.
  • the value preset in step (S5-4) can be set in ⁇ m units according to the type of prosthesis, the patient's condition, or various other environments.

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Abstract

La présente invention se rapporte à un procédé d'évaluation tridimensionnelle pour une prothèse dentaire intelligente, selon lequel, dans un processus de fabrication d'une prothèse amovible montée dans la bouche d'un patient ou une prothèse fixe montée sur une butée d'un patient édenté, des données de conception tridimensionnelle et des données de balayage de prothèse sont superposées et analysées, ce qui permet d'évaluer la précision, et l'ajustement d'un intervalle interne entre la prothèse amovible et le palais buccal du patient ou l'intervalle interne entre la prothèse fixe et la butée du patient, qui doivent être liés par du ciment, est évaluée dans un schéma d'analyse de superposition tridimensionnel. Afin d'accomplir un tel objectif, la présente invention comprend les étapes consistant à : générer des données de conception tridimensionnelle pour la fabrication d'une prothèse ; éditer les données de conception tridimensionnelle par rapport à des parties respectives à superposer et analyser ; effectuer un balayage tridimensionnel d'une prothèse fabriquée au moyen des données de conception tridimensionnelle, ce qui permet de générer des données de balayage tridimensionnel ; éditer les données de balayage tridimensionnel par rapport à des parties respectives à superposer et analyser ; et superposer et analyser les données de conception tridimensionnelle éditées et les données de balayage tridimensionnel éditées au moyen d'un logiciel de superposition/analyse tridimensionnelle, ce qui permet d'évaluer la précision de fabrication de prothèse.
PCT/KR2023/008586 2022-10-21 2023-06-21 Procédé d'évaluation tridimensionnelle pour prothèse dentaire intelligente WO2024085341A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR1020220136095A KR102495429B1 (ko) 2022-10-21 2022-10-21 보철물의 3차원 적합도 평가 방법
KR10-2022-0136094 2022-10-21
KR1020220136094A KR102495430B1 (ko) 2022-10-21 2022-10-21 보철물의 3차원 정확성 평가 방법
KR10-2022-0136095 2022-10-21

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KR20220039500A (ko) * 2020-09-21 2022-03-29 주식회사 메디트 의치 제작을 위한 교합고경 재현 방법
KR102495429B1 (ko) * 2022-10-21 2023-02-06 주식회사 에코앤리치 보철물의 3차원 적합도 평가 방법
KR102495430B1 (ko) * 2022-10-21 2023-02-07 주식회사 에코앤리치 보철물의 3차원 정확성 평가 방법

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050048432A1 (en) * 2002-08-22 2005-03-03 Align Technology, Inc. Systems and methods for treatment analysis by teeth matching
KR20200109274A (ko) * 2019-03-12 2020-09-22 주식회사 메디트 디지털 스캔바디 정렬 방법 및 이를 이용하는 장치
KR20210082882A (ko) * 2019-12-26 2021-07-06 주식회사 메디트 구조물 데이터 매칭 방법 및 구강 내 구조물 데이터 매칭 시스템
KR20220039500A (ko) * 2020-09-21 2022-03-29 주식회사 메디트 의치 제작을 위한 교합고경 재현 방법
KR102495429B1 (ko) * 2022-10-21 2023-02-06 주식회사 에코앤리치 보철물의 3차원 적합도 평가 방법
KR102495430B1 (ko) * 2022-10-21 2023-02-07 주식회사 에코앤리치 보철물의 3차원 정확성 평가 방법

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