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Application of CAD/CAM to fabrication of complete denture-Development of system for virtual artificial tooth arrangement-

Research Project

Project/Area Number 08672244
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 補綴理工系歯学
Research InstitutionKAGOSHIMA UNIVERSITY

Principal Investigator

KAWAHATA Naotsugu  KAGOSHIMA UNIVERSITY Dental School Associate Professor, 歯学部, 助教授 (20144511)

Co-Investigator(Kenkyū-buntansha) KAMADA Yumiko  KAGOSHIMA UNIVERSITY Dental Hospital Research Associate, 歯学部附属病院, 助手 (70284891)
MURAKAMI Mamoru  KAGOSHIMA UNIVERSITY Dental School Research Associate, 歯学部, 助手 (80264448)
KAMASHITA Yuji  KAGOSHIMA UNIVERSITY Dental School Research Associate, 歯学部, 助手 (90224641)
金城 博之  鹿児島大学, 歯学部附属病院, 助手 (80284892)
Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥2,500,000 (Direct Cost: ¥2,500,000)
Fiscal Year 1997: ¥200,000 (Direct Cost: ¥200,000)
Fiscal Year 1996: ¥2,300,000 (Direct Cost: ¥2,300,000)
KeywordsComplete Denture / CAD / CAM / Virtual artificial tooth arrangement / 3-D measurement / Edentulous Ridge
Research Abstract

To construct a complete denture by CAD/CAM,we developed and evaluated a system to virtually arrange artificial teech on a monitor screen of a personal computer.
Upper and lower edentulous plaster models and occlusion rims in which the ridgerelationship was recoded, and four-fold plaster models of teeth (C4-304, Nissin) were measured at intervals of 0.25 mm by a non-contact type shape measurement system (Surflacer VMS-250R,UNISN). The occlusion rims and edentulous plaster models were fixed on a fixation device for rotational measurement, and measured at right angles to the tentative plane of occlusion. The tooth plaster models were measured in the long axial and mesiondistal directions. The outlines of the tooth plaster models were generated from these data and reduced to 1/4 size.
The edentulous ridges as surface models, the anterior margin of the upper occlusion rim at the level of the occlusal plane as a refernce line and the artificial teeth for virtual arrangment were displayd. Moreover, the buccolingual reference lines on the occlusal plane for the lower tooth arrangement were calculated based on the inclination of the upper and lower residual ridges to the occlusal plane in a frontal section and were displayd. Using these reference lines, artificial teeth were arranged virtually by parallel movement, and horizontal, anteroposterior and mesiodistal rotation. A program was written using Visual Basic 4.0 (Microsoft) on a personal computer (PC-9821 St20, NEC) with a 17 inch moniter screen (Diamondtron RD17GII,Mitsubishi).
Though the software should be further improved, we could arrange surface-like gray level images of artificial teeth cirtually using the edentulous plaster models and the reference lines.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] 川畑 直嗣: "顎堤の対向関係に基づく臼歯部人工歯排列位置の評価方法" 日本補綴歯科学会雑誌. 40(95). 128-128 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 二俣 由美子: "総義歯の臼歯部人工歯の仮想排列-水平的位置関係について-" 日本補綴歯科学会雑誌. 41(98). 92-92 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Naotsugu Kawahata: "A Method of Evaluating the Position of Artificial Teeth on the Basis of Ridge Relationship" The Journal of the Japan Prosthodontic Society. Vol.40-95th Special Issue. 128-128 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yumiko Futamata: "Virtual Arrangement of Posterior Artificial Teeth in Fabricating Complete Denture" The Journal of the Japan Prosthodontic Society. Vol.41-98th Special Issue. 92-92 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 川畑直嗣: "顎堤の対向関係に基づく臼歯部人工歯排列位置の評価方法" 日本補綴歯科学会雑誌. 40(95). 128-128 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] 二俣由美子: "総義歯の臼歯部人工歯の仮想排列-水平的位置関係について-" 日本補綴歯科学会雑誌. 41(98). 92-92 (1997)

    • Related Report
      1997 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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