Clinical Research Abstracts

Waterpik® Water Flossers: 51% More Effective than String Floss for Reducing Gingivitis

Comparison of Irrigation to Floss as an Adjunct to Toothbrushing: Effect on Bleeding, Gingivitis, and Supragingival Plaque

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To evaluate the ability of a Waterpik® Water Flosser paired with either a power or manual toothbrush, and a manual toothbrush and floss, to reduce bleeding, gingivitis and supragingival plaque biofilm.


One hundred five subjects participated in this four-week study. One group used a Waterpik® Water Flosser with a manual toothbrush and a second used the Waterpik® Water Flosser with a power toothbrush. The control group used a manual toothbrush and floss. Subjects brushed twice daily and used either the Water Flosser or dental floss once daily. Plaque biofilm, bleeding, and gingivitis were evaluated at two and four weeks.


At 4 weeks, the addition of a Water Flosser resulted in significantly better oral health, regardless of toothbrush type used over manual brushing and flossing. Adding the Waterpik® Water Flosser was up to 93% better in reducing bleeding and up 52% better at reducing gingivitis than traditional dental floss.


The Waterpik® Water Flosser is an effective alternative to traditional dental floss for reducing gingivitis.