Purpose: A relationship between the distribution of periodontal bacteria species and malodor in children has not been sufficiently investigated. The present study was undertaken to determine the presence of 3 periodontopathic bacteria (Prevotella spp. P. intermedia, P. nigrescens, P. melaninogenica) in the supragingival plaques of 3 to 16-year-old children with different oral health conditions and oral malodor. Methods: The number of decayed and filled primary teeth (df) and Decayed, Missing and Filled permanent teeth (DMF),Papillary Marginal and Attached gingivitis (PMA) index, Oral Hygiene Index (OHI), and oral malodor of each subject were determined prior to the collection of supragingival plaques. Three periodontopathic bacteria(P. intermedia, P. nigrescens, P. melaninogenica ) in supragingival plaques were detected by using an immunoslot blot assay with monoclonal antibodies specific for each microorganism. Findings: The frequencies of periodontopathic bacteria in children with and without caries were not significantly different from each other. Positivity for P. intermedia, but not for P. nigrescens or P. melaninogenica was correlated with oral malodor. Oral malodor was also correlated with the debris index, a component of OHI.
The group with the higher OHI showed a higher prevalence of periodontopathic bacteria. For the 3 periodontopathic bacteria in the subjects tested, plaques positive for any of them were not age related. However,the frequencies of all 3 periodontopathic bacteria were the highest in the 3-6-year olds. Conclusion: The supragingival plaques in children can harbor 3 species of periodontopathic bacteria, P. intermedia,P. nigrescens, and P. melaninogenica.
The increase in probing depth with increasing age was not affected by the occurrence of periodontopathic bacteria. The high rate of occurrence of Pg, together with Pi and Pn, in subgingival plaque of the adult age groups was suggested to be associated with the high frequency of periodontal disease in the older age groups (above 30 to 49 years of age). The IBA appears to be useful for the efficient and rapid detection of periodontopathic bacteria.
The present study was to investigate the distribution of typical periodontpathic bacteria (Porphyromonas gingivalis, Prevotella intermedia and Actinobacillus actinomycetemcomitans) in tooth, tongue and buccal mucosa plaques in 3 to 17 Year old children. Clinical parameters (Rates of df, d, DMF, and D; plaque and gingival index) for each subject were determined prior to the collection of each site plaque. Three periodontopathic bacteria on each site samples were detected using IBA. The frequency of three bacteria for tooth plaque was higher than that for tongue or buccal mucosa plaque. The frequency of Porphyromonas gingivalis and Prevotella intermedia in supragingival plaques was significantly higher than that of corresponding ones in tongue or buccal mucosa plaques. The three bacteria also occurred more frequently in subjects aged between 10 and 14 years. Periodontopathic bacteria may be enhanced in circumpubertal children.
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