Table 2.

Elemental surface compositions of SCFs after different modes of brushing

		%C	%O	%N	%Si
Unbrushed 16-h SCF		60.5 ± 1.2	25.5 ± 1.3	9.8 ± 0.2	4.1 ± 0.1
Manual	Rotary–oscillatory	65.9 ± 2.9	21.7 ± 7.2	6.4 ± 2.2	6.0 ± 2.6
	OFF
	Sonic	55.2 ± 1.2	29.0 ± 4.0	8.5 ± 1.5	7.3 ± 1.2
	OFF
Powered	Rotary–oscillatory	57.0 ± 4.9	27.5 ± 3.4	4.4 ± 0.3	11.0 ± 1.8
	ON
	Sonic	46.6 ± 0.3	33.4 ± 0.3	8.5 ± 0.7	11.5 ± 0.7
	ON

Brushing was done manually (OFF) and powered (ON) with a rotary-oscillating and sonic toothbrush

± standard error over two measurements