Influence of the amount of dentifrice used for brushing on enamel and dentin abrasion

Purpose: To investigate whether the amount of dentifrice (dose) used per brushing affects the abrasion of the hard tooth tissues. Methods: Enamel and dentin specimens were subjected to simulated brushing with two commercial dentifrices (Prodent, Smyle dentifrice in tablet form) and positive as well as negative controls at varying amounts of dentifrices (standard dose, half, and double dose). Brushing without dentifrice (with water) functioned as a negative control. Tooth wear was quantified using profilometry, and statistical analysis was performed using one-way ANOVA and Tukey's post hoc test (<x= 0.05). Results: For enamel, dose variations had minimal impact. However, dentin wear increased significantly with higher doses, particularly for the positive control and Smyle at double dose (P< 0.05). Dilution reduced abrasivity inconsistently across brands.