全顎石膏模型における咬合接触の再現性  [in Japanese] Reproduction of Interocclusal Relationship on Stone Casts  [in Japanese]

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Author(s)

    • 荒井 由紀 ARAI Yuki
    • 東京医科歯科大学大学院医歯学総合研究科口腔機能再構築学系摂食機能保存学講座摂食機能保存学分野 Fixed Prosthodontics, Department of Restorative Sciences, Division of Oral Health Sciences, Graduate School, Tokyo Medical and Dental University

Abstract

We fabricate a prosthesis by the indirect method. To fabricate a prosthesis functionally harmonized with the stomatognathic system, the interocclusal relationship must be reproduced on stone casts as accurately as possible.<BR>In this study, two subjects (one male, age 23 ; one female, age 31) were selected, and the occlusal contacts of complete arch stone casts made by three different impression methods were observed and compared with the true occlusal contacts in the intercuspal position in the mouth. To take the Interocclusal records, we used a silicone bite checker.<BR>The following results were obtained. The occlusal contact points reproduced on the stone casts made by a conventional custom tray and a stock tray were rather low ; that is, the number of occlusal contact points was less, and the size of the occlusal contact area was smaller, than <I>in vivo</I>. The states of the occulusal contact on the casts made by the same method differed from each other. On the bite impression technique, the reproduction of occlusal contact was superior to that of the others. The shape, area, and number of contact regions under 60 micrometers were similar to contact regions under 30 micrometers in the mouth. There was no significant difference in reproduction between the custom tray and the stock tray.<BR>It is likely that the results were due to the distortion of the jaws and periodontal tissue during clenching at the intercuspal position, which could not be reproduced on the stone casts made by both the conventional custom and stock trays.

Journal

  • THE JOURNAL OF THE STOMATOLOGICAL SOCIETY,JAPAN

    THE JOURNAL OF THE STOMATOLOGICAL SOCIETY,JAPAN 67(4), 322-334, 2000-12-31

    The Stomatological society, Japan

References:  36

Cited by:  6

Codes

  • NII Article ID (NAID)
    10008138217
  • NII NACSIS-CAT ID (NCID)
    AN00302674
  • Text Lang
    JPN
  • Article Type
    Journal Article
  • ISSN
    03009149
  • Data Source
    CJP  CJPref  J-STAGE 
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