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- W2061775735 abstract "Abstract Infrequent occurrence of spirochetes and rather low proportions of these organisms have been reported in localized juvenile periodontitis, where periodontal lesions often harbour large numbers of Actinobacillus actinomycetem-comitans, a suspected principal periopathogen strongly implicated in the patho-genesis of this and other forms of chronic periodontitis. We studied the association of subgingival A. actinomycetemcomitans with the morphological composition of the subgingival microbiota in a large population of patients suffering from advanced periodontitis. Subgingival plaque from the deepest pockets of every quadrant of their dentitions was sampled and pooled in 70 patients between 14 and 63 years of age, and analysed morphologically by phase-contrast microscopy. A minimum % similarity index was employed to define 4 clusters with different morphological composition of the floras. The actual proportion of A. actinomycetemcomitans was determined at 2 sites with deep periodontal pockets. All clusters harboured patients infected with A. actinomycetemcomitans. If present, in clusters predominated by motile rods or medium-sized spirochetes, the organism was found in rather low proportions (median 5.3% and 3.4%, respectively). However, the cluster with a pooled flora mainly consisting of coccoid cells revealed periodontal sites with A. actinomycetemcomitans in proportions of more than 53% (median), if the organism was present (p<0.01). We found a positive correlation between proportions of A. actinomycetemcomitans and cocci(R = 0.65) and negative correlations with spirochetes and motile rods (R=−0.61, R=−0.59, respectively). Cautious interpretation of subgingival plaque predominated by coccoid cells is recommended, if deep periodontal pockets and obvious signs of inflammation are present, since these pockets were found to be often infected with large numbers of A. actinomycetemcomitans." @default.
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- W2061775735 date "1990-09-01" @default.
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- W2061775735 title "Morphological compositions of subgingival microbiota in Actinobacillus actinomycetemcomitans- associated periodontitis" @default.
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- W2061775735 doi "https://doi.org/10.1111/j.1600-051x.1990.tb01104.x" @default.
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