Fig. 2

a Schematic representation of low-level laser-treated areas with red circles (buccal, palatal, and mesial). b Measurement of the distance between the incisor and the 1st molar teeth with a digital caliper
a Schematic representation of low-level laser-treated areas with red circles (buccal, palatal, and mesial). b Measurement of the distance between the incisor and the 1st molar teeth with a digital caliper