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The effects of a probiotic milk drink on bacterial composition in the supra- and subgingival biofilm: a pilot study

In: Beneficial Microbes
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A. Becirovic Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Årstadveien 19, 5009 Bergen, Norway.

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J.F. Abdi-Dezfuli Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Årstadveien 19, 5009 Bergen, Norway.

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M.F. Hansen Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Årstadveien 19, 5009 Bergen, Norway.

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S.A. Lie Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Årstadveien 19, 5009 Bergen, Norway.

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E.N. Vasstrand Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Årstadveien 19, 5009 Bergen, Norway.

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A.I. Bolstad Department of Clinical Dentistry, Faculty of Medicine, University of Bergen, Årstadveien 19, 5009 Bergen, Norway.

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Probiotics can convert a dysbiotic bacterial environment into a healthy one. The aim of the present study was to assess the effect of daily intake of a probiotic milk drink on the composition of bacterial species in dental supra- and subgingival biofilms. Sixteen dental students were enrolled into this study with a crossover, within subject, design. The participants were asked to allow plaque accumulation by refraining from cleaning their molars during two separate periods, each lasting three weeks. Each period consisted of an initial professional dental cleaning procedure done at the university clinic, then a 3 week plaque accumulation period, followed by a return to the clinic for supra- and subgingival plaque sampling. The first period served as a control, and during the second plaque accumulation period the participants drank 200 ml probiotic milk beverage each day. The accumulated plaque removed at the end of the accumulation period was later tested against a panel of 20 oral bacterial species using the checkerboard method. Three weeks consumption of a probiotic beverage led to a significant reduction in 15 of 20 bacterial species present in supragingival plaque and a reduction in 4 of 20 bacterial species in subgingival plaque (all P<0.05). This study showed a favorable effect of probiotics on periodontopathic bacteria in dental biofilms. The potential influence of this kind of probiotic in prevention or treatment of periodontal inflammation deserves further study.

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