Dental plaque removal with a novel battery-powered toothbrush.
OBJECTIVE
To compare the plaque removal efficacy of a positive control power toothbrush (Oral-B Ultra Plaque Remover) to an experimental power toothbrush (Crest SpinBrush) following a single use.


METHODS
This study was a randomized, controlled, examiner-blind, 2-period crossover design which examined plaque removal with the two toothbrushes following a single use in 38 completed subjects. Plaque was scored before and after brushing using the Turesky Modification of the Quigley-Hein Index.


RESULTS
Baseline plaque scores were 1.89 and 1.91 for the experimental toothbrush and control toothbrush treatment groups, respectively. With respect to all surfaces examined, the experimental toothbrush delivered an adjusted (via analysis of covariance) mean difference between baseline and post-brushing plaque scores of 0.46 while the control toothbrush delivered an adjusted mean difference of 0.45. These results were not statistically significant (P=0.645). A 95% one-sided upper confidence limit on the Ultra Plaque Remover minus SpinBrush difference in amount of plaque removed was calculated as 9.4% of the Ultra Plaque Remover adjusted mean. A common criterion for what is known as an "at least as good as" test is that the 95% one-sided confidence limit on the product difference is below 10% of the control product mean. Using this criterion, the SpinBrush is at least as good as the Oral-B Ultra Plaque Remover. With respect to buccal and lingual surfaces, the experimental toothbrush delivered very similar results relative to the control toothbrush. These results were also not statistically significant (P> 0.564).
Biesbrock
Aaron R
AR
The Proctor & Gamble Company, Cincinnati, OH 45040-9462, USA. biesbrock.ar@pg.com
Walters
Patricia
P
Bartizek
Robert D
RD
Ruhlman
Douglas
D
Donly
Kevin J
KJ
D000328:Adult; D000704:Analysis of Variance; D016001:Confidence Intervals; D018592:Cross-Over Studies; D003773:Dental Plaque / Q000628:therapy*; D003774:Dental Plaque Index; D011211:Electric Power Supplies; D004867:Equipment Design; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D016037:Single-Blind Method; D018709:Statistics, Nonparametric; D014099:Toothbrushing / Q000295:instrumentation*