This study analyzed the
weight loss and surface roughness caused in Plexiglass specimens by conventional
dentifrices (
Sorriso, Colgate and Close Up) and specific
dentifrices used for cleaning of
dentures (Corega and Dentu Creme). Plexiglass specimens were divided into 6 groups (n=6) including: a control (distilled water - DW) and experimental groups. Brushing was performed in a
toothbrushing machine with a soft brush and a
dentifrice suspension and DW according to different brushing times (50, 100, 200 and 250 min -18,000, 36,000, 72,000 and 90,000 cycles, respectively, calculated to correspond to 1, 2, 4 and 5 years of regular brushing). The results of
weight loss and surface roughness were analyzed by ANOVA and Tukey's test at 5% significance level. In all tested times, the effect of DW was insignificant.
Dentifrices differed significantly from DW in the initial period. Corega
dentifrice caused greater mass loss in all studied times, followed by Close Up.
Dentifrices resulted in a surface roughness similar to the DW at 50 min. In the other times,
Sorriso, Colgate and Corega caused more surface roughness than DW. In conclusion, specific
dentifrices caused larger mass loss and lower surface roughness as conventional
dentifrice.