歯冠補綴物のCADシステムに用いる標準歯冠モデルの作成 : 第2報前歯部の標準歯冠モデルの作成  [in Japanese] A Study on Creating the Tooth Crown Basic Models Used in CAD System for Crown Restorations : Part 2 The Creation of the Tooth Crown Basic Models of Anterior Teeth  [in Japanese]

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Author(s)

    • 会田 英紀 AITA Hideki
    • 北海道大学歯学部歯科補綴学第二講座 Department of Crown and Bridge Prosthodontics, School of Dentistry, Hokkaido University
    • 上田 康夫 UEDA Yasuo
    • 北海道大学歯学部歯科補綴学第二講座 Department of Crown and Bridge Prosthodontics, School of Dentistry, Hokkaido University
    • 依本 卓見 YORIMOTO Takumi
    • 北海道大学歯学部歯科補綴学第二講座 Department of Crown and Bridge Prosthodontics, School of Dentistry, Hokkaido University
    • 疋田 一洋 HIKITA Kazuhiro
    • 北海道大学歯学部歯科補綴学第二講座 Department of Crown and Bridge Prosthodontics, School of Dentistry, Hokkaido University
    • 大畑 昇 OHATA Noboru
    • 北海道大学歯学部歯科補綴学第二講座 Department of Crown and Bridge Prosthodontics, School of Dentistry, Hokkaido University

Abstract

For the past 10 years, we have been engaged in research on development of CAD/CAM system for prosthetic restoration such as crown and bridge in molar teeth. In order to apply this system to anterior teeth, it is necessary to create the crown basic model data of the anterior teeth. The purpose of this study was to complete a library of basic crown model data of all teeth for the CAD system.<BR>The results were as follows:<BR>1. By dividing the incisal edge or the cuspid into a grid pattern, solid models of anterior teeth represented by bicubic Bezier surfaces were made from three-dimensional coordinate data of four-fold enlarged plaster models measured from five directions.<BR>2. In order to represent the coronal anatomical features of the anterior teeth, it was necessary to divide the four-fold enlarged models into more than 104 Bezier surfaces, and the real size models into more than 43 Bezier surfaces.<BR>3. The results suggested that consideration of the functional crown forms of the natural teeth may be necessary to decide the most suitable surface for basic crown models.

Journal

  • Nihon Hotetsu Shika Gakkai Zasshi

    Nihon Hotetsu Shika Gakkai Zasshi 42(5), 832-838, 1998-10-10

    Japan Prosthodontic Society

References:  13

Cited by:  11

Codes

  • NII Article ID (NAID)
    10008171041
  • NII NACSIS-CAT ID (NCID)
    AN00197911
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    03895386
  • Data Source
    CJP  CJPref  J-STAGE 
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