Bartizek Robert D, Biesbrock Aaron R
The Procter & Gamble Company, 8700 Mason-Montgomery Rd., Mason, OH 45040-9462, USA.
Am J Dent. 2004 Jan;17 Spec No:8A-12A.
To compare the plaque removal efficacy of an experimental powered toothbrush (Crest SpinBrush Pro with redesigned bristle head) versus a control powered toothbrush (Crest SpinBrush Pro) following a single use.
This study was a randomized, controlled, examiner-blind, 4-period crossover design that examined plaque removal with the two toothbrushes following a single use. Plaque was scored before and after brushing using the Turesky Modification of the Quigley-Hein Index.
A total of 44 subjects provided data that were used in the statistical analysis. Baseline whole-mouth plaque scores averaged 2.177 prior to using the experimental powered toothbrush with redesigned bristles and 2.220 prior to using the control powered toothbrush. The experimental power toothbrush delivered an adjusted (via ANCOVA) mean difference between baseline and post-brushing plaque scores of 0.662 while the control toothbrush delivered an adjusted mean difference of 0.669. The experimental powered toothbrush had, on average, 1.1% lower plaque removal scores than the control toothbrush. The difference between toothbrushes was not statistically significantly different from zero (P = 0.667). A 95% confidence interval on the mean difference in whole-mouth plaque removal scores was calculated and was within plus or minus 6.3% of the control power toothbrush adjusted mean.
比较一次性使用后，一款实验性电动牙刷（重新设计刷头的佳洁士旋转式牙刷Pro）与对照电动牙刷（佳洁士旋转式牙刷Pro）的牙菌斑清除效果。
本研究采用随机、对照、检查者盲法的4期交叉设计，在一次性使用两种牙刷后检查牙菌斑清除情况。使用Quigley-Hein指数的Turesky修正版在刷牙前后对牙菌斑进行评分。
共有44名受试者提供了用于统计分析的数据。在使用重新设计刷毛的实验性电动牙刷之前，全口牙菌斑评分基线平均为2.177，在使用对照电动牙刷之前为2.220。实验性电动牙刷在基线和刷牙后牙菌斑评分之间的调整后（通过协方差分析）平均差异为0.662，而对照牙刷的调整后平均差异为0.669。实验性电动牙刷的牙菌斑清除评分平均比对照牙刷低1.1%。两种牙刷之间的差异在统计学上与零无显著差异（P = 0.667）。计算了全口牙菌斑清除评分平均差异的95%置信区间，该区间在对照电动牙刷调整后平均值的正负6.3%范围内。
