Table 6. Paired sample test comparison of occluded area ratio pre- and postacidic treatment (samples stored in artificial saliva).

Treatment Group	Occluded area (%)		p- Value
	Preacidic challenge (mean ± SD)	Postacidic challenge (mean ± SD)
Abbreviation: SD, standard deviation.
Artificial saliva	10.9 ± 2.3	5.7 ± 1.8	0.001
EB@TiO 2	99.3 ± 1.0	85.0 ± 3.8	0.000
Colgate Pro-relief	80.1 ± 8.6	9.0 ± 2.2	0.000
Sensodyne repair	90.4 ± 3.0	88.1 ± 3.9	0.245