The Effect of Catechin-gel on Dental Plaque Control and Oral Bacteria in the Disabled

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  • カテキンジェルが障害者のプラークコントロールレコードおよび口腔細菌に及ぼす影響

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<p>Purpose：Dental caries and periodontal disease are infectious diseases caused by oral bacteria. Plaque control is essential for preventing these diseases since dental plaque is where these pathogens exist. In this study, we examined the effects of using catechin-gel to control dental plaque among the disabled using an electric toothbrush, and its effects on the number of oral bacteria in saliva.</p><p>Methods：Fifteen disabled individuals undergoing treatment in a dental clinic for the disabled were perticipated in this study. Brushing instructions under supervision by a dental hygienist were given. Catechin-gel was applied once a day for four weeks in the oral cavity after using an electric toothbrush to remove dental plaque, and then the plaque control records between pre- and post-application were compared. Furthermore, DNA was extracted from saliva and the number of oral bacteria was calculated using real-time PCR.</p><p>Results：The plaque control records pre- and post-application of catechin-gel were 62.8 （±22.7） and 63.7 （±20.1）％, respectively. Catechin-gel had no effect on the total number of oral bacteria and total number of streptococcus groups during oral cavity normalization calculated using real-time PCR. However, there was some influence on the bacteria causing dental caries and periodontitis. In particular, the number of Treponema denticola decreased significantly.</p><p>Conclusion：Catechin-gel did not quantitatively affect dental plaque in the disabled. We suggest that catechin-gel might have an effect on oral pathogens and, more importantly, could be useful for oral care among the disabled.</p>

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