The following factors were collected to analyze the potential association with dental caries increment after one year: salivary viscosity, pH of non-stimulated saliva, flow rate of stimulated saliva, buffering capacity of saliva, mutans streptococci count, lactobacilli count, pH of dental plaque, oral hygiene status, education level and income of parents, sucrose and acid intake frequency between main meals, tooth-brushing frequency, presence of incipient lesions (white / brown-spot lesions) and dentin lesions at the baseline.