• 제목/요약/키워드: computer-aided design

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심한 치아 마모와 수복 공간 부족을 보이는 환자에서 CAD/CAM 기술을 활용한 완전 구강 회복: 증례 보고 (Computer-aided design and manufacturing-based full mouth rehabilitation for a patient with excessive attrition and restricted vertical dimension: A case report)

  • 조준호;윤형인;여인성;한중석
    • 대한치과보철학회지
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    • 제57권4호
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    • pp.495-505
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    • 2019
  • 본 증례는 다수의 치아 상실과 심한 치아 마모로 인해 교합 고경(occlusal vertical dimension)의 감소 및 수복 공간 부족을 보이는 환자에 대한 computer-aided design and computer-aided manufacturing (CAD/CAM) 기술을 활용한 완전 구강 회복 치료이다. 진단 단계에서 교합 고경에 대한 여러 분석을 통해 교합 고경 증가를 통한 완전 구강 회복을 계획하였다. 새롭게 설정된 교합 고경을 반영한 임시 수복물을 환자에게 적용하여 적응시키고, 이중 스캔 방법을 통해 임시 수복물의 정보를 최종 수복물에 옮긴 후, 3D 프린팅을 통해 금속 코핑을 제작하여 최종 고정성 금속 도재 수복물을 완성하였다. 이후 전자 서베잉과 3D 프린팅을 통해 가철성 국소의치 금속 구조물을 제작, 최종 가철성 국소의치로 환자치료를 완료하였다. 이러한 디지털 기술을 활용한 완전 구강 회복 치료로 환자는 기능적, 심미적으로 만족하였고, 술자는 임상적으로 받아들일 만한 치료결과로 판단하였다.

컴퓨터를 이용한 동력전달용 인벌류우트 원통치차의 설계 (Computer-Aided Design of Involute Cylindrical Gears for Power Transmission)

  • 정태형;김민수
    • 대한기계학회논문집
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    • 제14권3호
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    • pp.594-602
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    • 1990
  • 본 연구에서는 동력전달용 인벌류우트 원통치차(스퍼어 및 헬리컬 기어)의 강 도 및 각종 영향인자를 충분히 고려하면서 크기를 최소로 하는 치차장치의 설계법을 개발하고, 이 설계법을 기본으로 하여 퍼스널 컴퓨터 상에서 누구나 손쉽게 설계에 이 용할 수 있는 설계 시스템을 개발하여 그 평가를 수행한다.

Marginal fit of three different nanocomposite inlays fabricated with computer-aided design/computer-aided manufacturing (CAD/CAM) technology: a comparative study

  • Hyunsuk Choi;Jae-Young Jo;Min-Ho Hong
    • Journal of Yeungnam Medical Science
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    • 제41권2호
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    • pp.80-85
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    • 2024
  • Background: This study aimed to compare and evaluate the marginal fit of nanocomposite computer-aided design/computer-aided manufacturing (CAD/CAM) inlays. Three types of nanocomposite CAD/CAM blocks (HASEM, VITA Enamic, and Lava Ultimate) were used as materials. Methods: Class II disto-occlusal inlay restorations were prepared on a typodont mandibular right first molar using diamond rotary instruments. The inlays were fabricated using CAD/CAM technology and evaluated using the silicone replica technique to measure marginal gaps at five locations on each inlay. The data were analyzed by two-way analysis of variance and Tukey post hoc tests (α=0.05). Results: There were no significant differences in the marginal gaps based on the type of nanocomposite CAD/CAM inlay used (p=0.209). However, there was a significant difference in the marginal gaps between the measurement regions. The gingival region consistently exhibited a larger marginal gap than the axial and occlusal regions (p<0.001). Conclusion: Within the limitations of this in vitro study, the measurement location significantly influenced the marginal fit of class II disto-occlusal inlay restorations. However, there were no significant differences in the marginal gaps among the different types of CAD/CAM blocks. Furthermore, the overall mean marginal fits of the class II disto-occlusal inlay restorations made with the three types of nanocomposite CAD/CAM blocks were within the clinically acceptable range.

임상가를 위한 특집 2 - CAD/CAM 기술을 이용한 총의치 제작의 현재와 전망 (Current status and future perspectives of CAD/CAM fabricated complete denture)

  • 박찬진
    • 대한치과의사협회지
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    • 제52권6호
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    • pp.346-353
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    • 2014
  • Currently, computer-aided technology becomes one of main issues in clinical dentistry. About 25 years ago, the development of dental CAD/CAM systems for the fabrication of crowns and fixed partial dentures leads to be able to fabricate complete denture today. The fabrication of milled complete denture prostheses with digital scanning technology may decrease the number of patient appointments. However, the precise tooth arrangement and evaluation by patient is not promising relatively. The purpose of this review was to analyze the existing literature on computer aided technology for fabricating complete denture with historical background, current status, and future perspectives. In addition, two available commercial systems were introduced.

Computer Aided Engineering Design of Power Injection Molding Process for Dental Scaler Top Mold Design

  • Hwang, C.J.;Ko, Y.B.;Park, H.P.;Chung, S.T.;Rhee, B.O.
    • 한국분말야금학회:학술대회논문집
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    • 한국분말야금학회 2006년도 Extended Abstracts of 2006 POWDER METALLURGY World Congress Part 1
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    • pp.497-498
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    • 2006
  • Powder Injection Molding (PIM) has recently been recognized as an advanced manufacturing technology for low-cost mass production of metal or ceramic parts of complicated geometry. With this regards, design technology of dental scaler tip PIM mold, which has complex shape, with the help of computer-aided analysis for powder injection molding process was developed. Compter aided analysis results, such as filling pattern, weldline formation, and air vent position prediction were investigated and eventually showed good agreements with experimental results.

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컴퓨터 응용기술(CAE)을 이용한 기기특성의 유추해석과 계열화 설계 (Systematization design and the analogical interpretation of machinery character by use CAE)

  • 조경재;조제황;이권현
    • 한국정밀공학회:학술대회논문집
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    • 한국정밀공학회 1996년도 추계학술대회 논문집
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    • pp.851-856
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    • 1996
  • In this paper, we introduce the design method using CAE(Computer Aided Engineering) which is profitable in the compatability and standardization of the developed product, and the reduction of construction time and price to develop and design a machine equipment. Particularly, we select the standard model to design or develop from the large machinery to the super precision one, extract the peculiar characters of the model by the close analysis of the physical and technical part, the experiment for the characteristics of objective dimensions by analogical mathematical analysis for previous results, and can induce the design model demanded by user investigating optimal data in the design previous We present the analogical algorithms and process method of design factors and restriction factors in the systematization design with computer. Then we analyze step functions for each systematization equipment and induce the process of technical data with actuator model.

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방사선 조사된 상악골에서 all-on-4 임플란트에 의해 지지되는 지르코니아 고정성 보철물 수복 증례 (Zirconia ceramic fixed dental prosthesis with all-on-4 concept implants for irradiated maxilla: A case report)

  • 최은주;조혜원
    • 대한치과보철학회지
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    • 제55권2호
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    • pp.218-224
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    • 2017
  • 방사선치료를 받은 상악에 임플란트 지지 고정성 보철물을 이용하여 수복하는 것은 골치유능력이 낮기 때문에 상세한 치료계획이 필요하다. All-on-4 개념에 의한 임플란트 식립은 골이식을 피하면서 임플란트를 매식할 수 있어 유리하다. 일반적으로 경사된 임플란트에는 기성 경사형 지대주를 사용해왔다. 본 임상증례에서는 computer-aided design and computer-aided manufacturing (CAD/CAM)으로 제작된 지대주를 사용하였다. 본 증례는 all-on-4 개념에 의해 임플란트를 매식하고 CAD/CAM titanium 지대주를 제작한 다음 CAD/CAM zirconia 고정성 보철물로 수복하여 좋은 결과를 얻었기에 보고하고자 한다.

Use of the surface-based registration function of computer-aided design/computer-aided manufacturing software in medical simulation software for three-dimensional simulation of orthognathic surgery

  • Kang, Sang-Hoon;Lee, Jae-Won;Kim, Moon-Key
    • Journal of the Korean Association of Oral and Maxillofacial Surgeons
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    • 제39권4호
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    • pp.197-199
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    • 2013
  • Three-dimensional (3D) computed tomography image models are helpful in reproducing the maxillofacial area; however, they do not necessarily provide an accurate representation of dental occlusion and the state of the teeth. Recent efforts have focused on improvement of dental imaging by replacement of computed tomography with other detailed digital images. Unfortunately, despite the advantages of medical simulation software in dentofacial analysis, diagnosis, and surgical simulation, it lacks adequate registration tools. Following up on our previous report on orthognathic simulation surgery using computer-aided design/computer-aided manufacturing (CAD/CAM) software, we recently used the registration functions of a CAD/CAM platform in conjunction with surgical simulation software. Therefore, we would like to introduce a new technique, which involves use of the registration functions of CAD/CAM software followed by transfer of the images into medical simulation software. This technique may be applicable when using various registration function tools from different software platforms.

Accuracy evaluation of dental models manufactured by CAD/CAM milling method and 3D printing method

  • Jeong, Yoo-Geum;Lee, Wan-Sun;Lee, Kyu-Bok
    • The Journal of Advanced Prosthodontics
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    • 제10권3호
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    • pp.245-251
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    • 2018
  • PURPOSE. To evaluate the accuracy of a model made using the computer-aided design/computer-aided manufacture (CAD/CAM) milling method and 3D printing method and to confirm its applicability as a work model for dental prosthesis production. MATERIALS AND METHODS. First, a natural tooth model (ANA-4, Frasaco, Germany) was scanned using an oral scanner. The obtained scan data were then used as a CAD reference model (CRM), to produce a total of 10 models each, either using the milling method or the 3D printing method. The 20 models were then scanned using a desktop scanner and the CAD test model was formed. The accuracy of the two groups was compared using dedicated software to calculate the root mean square (RMS) value after superimposing CRM and CAD test model (CTM). RESULTS. The RMS value ($152{\pm}52{\mu}m$) of the model manufactured by the milling method was significantly higher than the RMS value ($52{\pm}9{\mu}m$) of the model produced by the 3D printing method. CONCLUSION. The accuracy of the 3D printing method is superior to that of the milling method, but at present, both methods are limited in their application as a work model for prosthesis manufacture.