Statistical analysis
GINGIVAL BLEEDING, PLAQUE
The sample size calculation was based on mean values and standard deviations of overall plaque scores provided by Heiß-Kisielewsky et al. comparing the cleansing efficacy of microburst technology (On a proband-level, RMNPI values were calculated as the total number of areas with plaque present divided by the total number of sites scored and were then compared between the two tooth brushing procedures by Wilcoxon signed-rank test. The gingival bleeding index was calculated in the same manner. If not stated otherwise, median and interquartile range are given. Significance level was set at 