Efficacy of Nonthermal Atmospheric Pressure Plasma for Tooth Bleaching

Table 1

The mean after tooth bleaching with and without plasma and values using Student’s -test.

Observation times	Bleaching agents		Mean		-test; values
			Plasma	Without plasma
10 min	15% CP	20			0.000^*
20 min	15% CP	20			0.000^*
30 min	15% CP	20			0.000^*

CP: carbamide peroxide, : overall color changes, and SD: standard deviation.
^* values show significant differences between the two groups ( < 0.05).