Figure 4

Comparison of different brushing techniques between the robot and the subjects. Cumulative number of not completely cleaned planimetrical fields of teeth 32–47, both toothbrushes and all subjects and robot cycles (total number of fields 9x9 = 81). Explanation: Number of observations: n = 27 subjects; n = 14 robot runs. The mean of a series is depicted using a black point, while the median is drawn as a line through the center of the box. The box represents the middle 50 percent of the data. At both sides it is connected with the last data point within the 1.5* interquartile range from the first resp. third quartile. Data points outside are defined as (°) outliers.