Streptococcus mutansの年齢別歯面別分布と2,3の口腔内常在菌の口腔内分布に関する研究

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The distribution of Streptococcus, Lactobacillus, Veillonella, and Granular organisms in the oral cavity of 40 adults was examined. The results are as follows. 1) The isolation frequency of Str. mutans was high in the pits and fissures of the molars, but low on the lingual smooth surface of the lower incisors and the surface of the tongue. 2) The isolation frequency of Granular organisms (Actinomyces viscosus) was high on the lingual smooth surface of the lower incisors 3) Positive correlations between Streptococcus, Veillonella, and Granular organisms were comparatively clear on the lingual smooth surface of the lower incisors, but not clear in the pits and fissures of the molars. The distribution of Str. mutans in the dental plaque of different tooth sites and different age groups was examined. The results are as follows. 1) In the permanent dentition, the isolation frequency of Str. mutans was highest in the pits and fissures of the molars. In the deciduous dentition, it was highest on the proximal surface of the upper incisors. 2) In 1st and 2nd grade children of primary school, the isolation frequency of Str. mutans was higher on the labial surface of the upper incisors than on the proximal surface of the upper incisors, but in 5th and 6th grade children of primary school this was reversed. 3) There was tendency for the isolation frequency of Str. mutans on the labial surface of the upper incisors to decrease with age. 4) Str. mutans (serotype H1) was predominant in all tooth sites. 5) The isolation frequency of Str. mutans (serotype H2) on the proximal surface of the upper incisors was higher than in other sites. 6) Str. mutans (serotype R) was not detected in any tooth sites.
有限責任中間法人日本口腔衛生学会の論文

Streptococcus mutansの年齢別歯面別分布と2,3の口腔内常在菌の口腔内分布に関する研究

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