Surface roughness of enamel, dentin and a composite resin after using an experimental prophylaxis paste

Resumo

The study aimed to evaluate an experimental paste containing Biosilicate® micron-sized particles as a polishing agent for enamel, dentin and composite resin substrates. Specimens were prepared and stored in distilled water for one week (n=30 for each substrate). Then, samples were randomly allocated in three treatment groups according to prophylaxis protocol: (Group 1) prophylaxis with rubber cup and experimental paste containing Biosilicate®; (Group 2) prophylaxis with rubber cup and commercial prophylaxis paste Herjos®; and (Group 3) prophylaxis with air-polishing device containing sodium bicarbonate powder. Surface roughness (SR) and scanning electron microscopy (SEM) analysis were performed before (t0) and after the treatments (t1) (five times with 30 days-interval). Regarding time factor (t0 x t1), enamel (0.16 x 0.57), dentin (0.23 x 1.5) and composite resin (0.12 x 0.86) from Group 3 showed SR values statistical different (p<0.05) when compared to baseline values. After treatment in Group 3, alteration of SR in dentin (1.5) was more significant (p<0.001) than enamel (0.57) and composite resin (0.86). Regarding prophylaxis protocol factor, there was statistical difference (p<0.001) when comparing Group 1 and Group 2 to Group 3 for all substrates. Prophylaxis with rubber-cup and an experimental Biosilicate® paste did not cause deleterious effect on SR of enamel, dentin and composite resin. 

Key words: Biocompatible materials; dental prophylaxis; surface properties