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Oral rinses containing chemotherapeutic agents, such as cetylpyridinium chloride(CPC), can alleviate plaque-induced gingival infections, but how oral microbiota respond to these treatments in human population remains poorly understood. Via a doubleblinded, randomised controlled trial of 91 subjects, the impact of CPC-containing oral rinses on supragingival plaque was investigated in experimental gingivitis, where the subjects, after a 21-day period of dental prophylaxis to achieve healthy gingivae, received either CPC rinses or water for 21 days. Within-subject temporal dynamics of plaque microbiota and symptoms of gingivitis were pro?led via 16 S ribosomal DNA gene pyrosequencing and assessment with the Mazza gingival index.Cetylpyridinium chloride conferred gingival bene?ts, as progression of gingival in?ammation resulting from a lack of dental hygiene was signi?cantly slower in the mouth rinse group than in the water group due to inhibition of 17 gingivitis-enriched bacterial genera. Tracking of plaque α and β diversity revealed that CPC treatment prevents acquisition of new taxa that would otherwise accumulate but maintains the original biodiversity of healthy plaques. Furthermore, CPC rinses reduced the size, local connectivity and microbiota-wide connectivity of the bacterial correlation network, particularly for nodes representing gingivitisenriched taxa. The ?ndings of this study provide mechanistic insights into the impact of oral rinses on the progression and maturation of dental plaque in the natural human population.
Oral rinses containing chemotherapeutic agents, such as cetylpyridinium chloride (CPC), can alleviate plaque-induced gingival infections, but how oral microbiota respond to these treatments in human population remains poorly understood. Via a doubleblinded, randomized controlled trial of 91 subjects, the impact of CPC-containing oral rinses on supragingival plaque was investigated in experimental gingivitis, where the subjects, after a 21-day period of dental prophylaxis to achieve healthy gingivae, received either CPC rinses or water for 21 days. Within-subject temporal dynamics of plaque microbiota and symptoms of gingivitis were pro? led via 16 s ribosomal DNA gene pyrosequencing and assessment with the Mazza gingival index. Cetylpyridinium chloride conferred gingival bene? ts, as progression of gingival in? ammation resulting from a lack of dental hygiene was signi? cantly slower in the mouth rinse group than in the water group due to inhibition of 17 gingivitis-enriched bacterial genera Tracking of plaque α and β diversity revealed that CPC treatment prevents new taxa that would not accumulate but maintain the original biodiversity of healthy plaques. Furthermore, CPC rinses reduced the size, local connectivity and microbiota-wide connectivity of the bacterial correlation network ndings of this study provide mechanistic insights into the impact of oral rinses on the progression and maturation of dental plaque in the natural human population.