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  • Title: The additional effect of a dentifrice on the instant efficacy of toothbrushing: a crossover study.
    Author: Paraskevas S, Rosema NA, Versteeg P, Timmerman MF, van der Velden U, van der Weijden GA.
    Journal: J Periodontol; 2007 Jun; 78(6):1011-6. PubMed ID: 17539713.
    Abstract:
    BACKGROUND: Inconclusive evidence exists in the literature with regard to the additional (beneficial) mechanical effect of a dentifrice on plaque removal. A previous split-mouth study found that a dentifrice did not contribute to plaque removal. Because of limitations of the split-mouth model, a crossover design was used to evaluate whether a commercially available dentifrice had an additional effect on mechanical plaque removal during manual toothbrushing. METHODS: Thirty-six subjects were given a manual toothbrush and a standard dentifrice. After a 48-hour plaque accumulation, subjects brushed under supervision with or without a dentifrice (total time of 2 minutes) in a 2 x 2 crossover design. RESULTS: Plaque reductions were 50% with and 56% without the use of dentifrice. This 6% difference was statistically significant (P = 0.034). Explorative analysis showed that brushing without a dentifrice was more effective in removing plaque on the approximal surfaces. CONCLUSIONS: The use of a dentifrice did not contribute to mechanical plaque removal during manual toothbrushing. It seemed that the mechanical action provided by the toothbrush was the main factor in the plaque-removing process.
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