1887

Abstract

Terminal RFLP (T-RFLP) analysis was used to investigate changes in the oral microbiota in saliva and subgingival plaque samples from one patient with aggressive periodontitis (subject A) and two patients with chronic periodontitis (subjects B and C) before and 3 months after periodontal treatment. Substantial changes in the T-RFLP patterns of subgingival plaque samples of subjects B and C were noted after 3 months of improved oral hygiene and full-mouth supra- and subgingival scaling and root planing. However, there was little change in the subgingival microbiota of subject A. Although the proportions of terminal restriction fragments (T-RFs) larger than 1000 bp were notable in the T-RFLP patterns generated after digestion with I of the samples from two subjects before treatment (subject B, 35.5 %; subject C, 29.6 %), the proportions of these T-RFs were significantly reduced or not detected after treatment (subject B, none; subject C, 4.1 %). Real-time PCR showed a significant change in the proportions of target bacteria in subgingival plaque samples of subject B. After 3 months, the population was markedly reduced (3.1 × 10 %), whereas the proportion of before treatment was 7.6 %. The proportions of , and were also markedly diminished after treatment. Similarly, the proportion of the T-RF presumed to represent was 5.9 % and became undetectable after 3 months. Analysis of 16S rRNA gene clone libraries from subgingival plaque samples of subject B before and after treatment showed a notable change in the subgingival microbiota. These results were in agreement with the T-RFLP analysis data and showed that the T-RFs larger than 1000 bp represent species. Our results indicate that T-RFLP analysis is useful for evaluation of the effects of medical treatment of periodontitis.

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2004-06-01
2019-11-18
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