title: Comparison of a manual and a new electric toothbrush for controlling plaque and gingivitis.
abstract: In the present clinical trial, the effect on existing plaque and gingivitis of a new electric toothbrush (ET) was compared to that of a manual toothbrush (MT). 40 medical students, age 18-30 years, participated. Plaque index (PlI) and gingival index (GI) were recorded at 6 sites at all teeth. At baseline, a PlI and GI > 1 were required. The participants were at random allocated to a group using either ET or MT and were instructed only to use the assigned toothbrush, brushing each morning and evening for 2 min. No oral hygiene instruction was given. Re-examination was done after 1, 2 and 6 weeks. In the MT group, a minor decrease in mean PlI was found after 6 weeks (all sites: from 1.2 to 1.1, approximal sites: from 1.4 to 1.2). The corresponding figures in the ET group were: 1.2 to 0.6 and 1.4 to 0.8. After 6 weeks, the % of sites with visible plaque with MT was: 24% (all sites) and 30% (approximal sites) and with ET 8% and 9%, respectively. With MT, mean GI was unchanged after 6 weeks compared to baseline, whereas with ET, the changes were from 1.1 to 0.9 (all sites) and from 1.1 to 1.0 (approximal sites). The % of sites with GI score > or = 2 had not changed after 6 weeks with MT (all sites: 11%, approximal sites: 13%). With ET, these results were 3% and 4%, respectively.
authors.affiliation: Department of Periodontology, School of Dentistry, Faculty of Health Sciences, University of Copenhagen.
authors.forename: K
authors.initials: K
authors.lastname: Stoltze
authors.forename: L
authors.initials: L
authors.lastname: Bay
mesh_terms: D000293:Adolescent; D000328:Adult; D003773:Dental Plaque / Q000517:prevention & control*; D003774:Dental Plaque Index; D005891:Gingivitis / Q000517:prevention & control*; D006801:Humans; D016014:Linear Models; D010512:Periodontal Index; D014099:Toothbrushing / Q000295:instrumentation*