ランタンの口腔微生物に及ぼす影響

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タイトル別名
  • Influence of Lanthanum on Oral Microbes
  • ランタン ノ コウコウ ビセイブツ ニ オヨボス エイキョウ

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Lanthanum one of the rare earth elements which belongs to the law of periodicity family 3, subfamily A, inhibited caries formation in hamsters infected with S. mutans.<BR>The change of total number of microbes, streptococci, lactobacilli, and S. mutans, was investigated within the oral cavity of hamsters given the water with Lanthanum nitrate.<BR>With a cariogenic diet and a concentration of 30 μg/ml Lanthanum nitrate solution, the appearance time of S. mutans was delayed and its number tended to decrease.<BR>In the presence of the crude glucosyltransferases (GTase) of S. mutans B 13 and sucrose, the adherence of heat-killed cells of S. mutans, lactobacilli, actinomyces, and yeast-like organisms was compared when treated with Lanthanum nitrate solution and when not treated by it.<BR>It was observed that the ratio of adherence of each strains decreased when it was treated with 20-40 μg/ml.

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