Comparison of colour improvement and stability of white spot lesions following infiltration, micro-abrasion, or CPP-ACP treatments in vitro

The objective was to compare the colour improvement of white spot lesion and the colour stability of treated enamel to after discolouration in vitro. Method: Artificial WSLs (2*2 mm) were created on the outer surface of 60 permanent premolars and randomly allocated to 4 groups.