金銀パラジウム合金の変色に関する臨床的研究 : 口腔微生物叢,口腔内揮発性硫化物  [in Japanese] A Clinical Study on Discoloration of 12Wt%Au-Ag-Pt Alloy : Oral Microbial Flora and Volatile Sulfur Compounds (VSC)  [in Japanese]

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Author(s)

    • 高山 慈子 TAKAYAMA Yasuko
    • 鶴見大学歯学部歯科補綴学第一講座 The First Department of Prosthetic Dentistry, Tsurumi University School of Dental Medicine
    • 三浦 英司 MIURA Eiji
    • 鶴見大学歯学部歯科補綴学第一講座 The First Department of Prosthetic Dentistry, Tsurumi University School of Dental Medicine
    • 細井 紀雄 HOSOI Toshio
    • 鶴見大学歯学部歯科補綴学第一講座 The First Department of Prosthetic Dentistry, Tsurumi University School of Dental Medicine
    • 前田 伸子 MAEDA Nobuko
    • 鶴見大学歯学部口腔細菌学教室 Department of Oral Bacteriology, Tsurumi University Schoo1 of Dental Medicine

Abstract

This study was conducted to investigate the principal factors involved in the discoloration of 12 Wt% Au-Ag-Pt alloy. Luminance of cast clasps, oral conditions, the presence cariogenic microbes such as <I>Streptococcus</I> <I>mutans</I> and <I>Lactobacillus</I> in saliva, <I>Candida</I> on the tongue and the amount of volatile sulfur compounds (VSC: H<SUB>2</SUB>S and CH<SUB>3</SUB>SH) produced by the tongue coating were evaluated in 70 subjects (VSC: 45 subjects). The surfaces of cast clasps were observed using an electron probe X-ray microanalyzer and changes in the surface were evaluated in relation to the degree of discoloration.<BR>The results were as follows:<BR>1. The Mann-Whitney U-test revealed statistically significant differences (p<0.05) between the production of CH<SUB>3</SUB>SH and VSC (CH<SUB>3</SUB>SH+H<SUB>2</SUB>S) and luminance.<BR>2. Examinations of the cross section of markedly discolored casts revealed a very rough surface. A distinct peak of S was also indicated by linear analysis.<BR>The results demonstrated that among the many different factors such as oral conditions and oral flora, the production of CH<SUB>3</SUB>SH was the most significantly related to the discoloration of 12 Wt% Au-Ag-Pt alloy. The potential for discoloration tended to be higher in subjects who had a high production of CH<SUB>3</SUB>SH.

Journal

  • Nihon Hotetsu Shika Gakkai Zasshi

    Nihon Hotetsu Shika Gakkai Zasshi 44(2), 208-220, 2000-04-10

    Japan Prosthodontic Society

References:  23

Cited by:  10

Codes

  • NII Article ID (NAID)
    10008155081
  • 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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