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To determine the effectiveness of a Waterpik® Water Flosser in reducing clinical signs of inflammation as compared to brushing alone.
Seventy two subjects were randomized equally into two groups in this four week, parallel clinical trial: ADA standard manual toothbrush and Waterpik® Water Flosser (WF) or ADA standard manual toothbrush alone (MT). Inflammation was measured using bleeding on probing (BOP) and the Modified Gingival Index (MGI) at baseline, two weeks, and four weeks. The Rustogi Modified Navy Plaque Index (RMNPI) scores were measured at baseline, two weeks, and four weeks. Both groups brushed as they normally do and used the toothpaste provided.
Both groups showed a significant reduction in BOP, MGI, and RMNPI at four weeks (p<0.001, except marginal RMNPI for MT p=0.006). The WF group was significantly more effective for all clinical measures, improving BOP 3.1X, MGI 2.7X, and Plaque 2.4X.
This study demonstrates that a Waterpik® Water Flosser and manual toothbrush are superior to brushing alone in the reduction of inflammation and dental plaque.