Interdental hygiene behavior
In total, n = 43 used interdental hygiene devices, with significantly more persons in the BP group than in the AU group (n = 31 vs. n = 12; exact p < 0.001). The majority of them (n = 38) applied dental floss, whereas only two of the AU group and three of the BP group applied interdental brushes. There were no group differences in the mean number of processed interdental spaces (mean ± SD: 18.42 ± 5.9 vs. 17.42 ± 6.4, respectively; p = 0.627). N = 4 in each group applied dental floss correctly.