Table 3 Tooth brushing performance of 10- and 15-year olds (including all participants, N = 66)

Tooth contact time (seconds)

201.1 (87.5)

196.1 (75.8)

 Inner surfaces

32.4 (33.3); 19.3 (4.6, 60.9)

30.4 (26.7)

 Outer surfaces

78.8 (52.1)

95.4 (54.9); 78.2 (57.7, 125.3)

 Occlusal surfaces

89.9 (44.8)

70.3 (36.0)

% of tooth contact time

 Inner surfaces

14.8 (13.8); 12.5 (2.4, 24.0)

15.8 (11.5)

 Outer surfaces

39.0 (16.5)

47.4 (14.7)

 Occlusal surfaces

46.2 (18.0)

36.8 (13.4)

% of movements on inner surfaces^{a, B}

 Circular^c

1.0 (5.5); 0.0 (0.0, 0.0)

0.7 (3.3); 0.0 (0.0, 0.0)

 Horizontal

53.5 (39.5); 60.1 (8.5, 93.3)

68.8 (36.2); 85.9 (32.0, 98.2)

 Vertical

45.4 (40.1); 35.3 (6.6, 91.5)

30.5 (35.2); 14.1 (1.8, 67.6)

 No movements^d

0.2 (0.5); 0.0 (0.0, 0.0)

N/A

% of movements on outer surfaces^b

 Circular

38.0 (36.0); 25.7 (0.0, 78.5)

44.0 (36.6); 46.4 (0.3, 75.8)

 Horizontal

55.8 (38.2); 57.3 (15.8, 97.6)

51.1 (39.2); 42.7 (17.5, 98.4)

 Vertical

5.0 (16.8); 0.0 (0.0, 0.8)

4.5 (9.7); 0.0 (0.0, 3.7)

 No movements

1.2 (2.1); 0.0 (0.0, 1.3)

0.4 (0.7) 0.0 (0.0, 0.8)