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  • Title: The effect of a new electric toothbrush on supragingival plaque and gingivitis.
    Author: Baab DA, Johnson RH.
    Journal: J Periodontol; 1989 Jun; 60(6):336-41. PubMed ID: 2778601.
    Abstract:
    This study tested the effectiveness of a rechargeable electric toothbrush, Interplak, in removing supragingival plaque and resolving gingivitis. Forty adults with gingivitis were randomly assigned to either a "manual" or "electric" group. Detailed oral hygiene instructions were given and a blind examiner assessed plaque scores before and after brushing, toothbrush abrasion, and gingival inflammation at baseline, 1, 2, and 4 weeks. Subjects using the electric brush had significantly lower (P less than 0.05) mean plaque and gingival inflammation scores. The electric group's plaque scores fell from 77% at baseline to 28% (before brushing) and 14% (after brushing) at 4 weeks; the manual group's dropped from 75% to 50% and 30% (before and after brushing, respectively). The mean G.I. for the electric group fell from 1.65 at baseline to 1.28 at 4 weeks, while the manual group's scores decreased from 1.65 to 1.43. The results suggest that the electric brush removed supragingival plaque and resolved gingivitis better than the manual brush over a 28-day period. However, a telephone survey conducted 6 months later indicated that most subjects were not using the device twice a day as they had during the study.
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