Fig. 1
From: What characterizes effective tooth brushing of daily users of powered versus manual toothbrushes?
Distribution of brushing time of sextants on the outer and inner surfaces for PT (A) and MT (B) users, respectively. The line in the middle of the box represents the median, the upper and lower borders the 25% (Q1) and 75% (Q3) quartiles respectively. The whiskers represent the highest/lowest value that is still within the limits for outlier values (1.5 times the interquartile distance) and the dots show extreme values. The red line marks a time of 7.5 s per surface sextant, which is considered sufficiently long