Aim: To evaluate,
in vitro, the effect of brushing with a
Ricinus communis
-based experimental
toothpaste on color stability and surface roughness of artificial teeth.
Methods: Ninety artificial
teeth (maxillary central incisors) in different shades, light and dark (NatusDent Triple Pressing,
Dentbras) were used. Initial color (Spectrophotometer Easyshade, VITA) and surface roughness
(Rugosimeter Surfcorder SE 1700, Kosakalab) readouts were performed. After baseline
measurements, samples were assigned to 10 groups (n=9) according to the artificial tooth shade
and type of toothpaste used during the mechanical brushing test (Pepsodent, MAVTEC): Sorriso
Dentes Brancos – SDB, Colgate Luminous White - CLW (Colgate-Palmolive), Close up White
Now - CWN (Unilever), Trihydral - THL (Perland Pharmacos) and
Ricinus communis - RCE
(Experimental). After 29,200 cycles of brushing, corresponding to 2 years of brushing by a healthy
individual, new color and roughness readouts of the specimens were performed. Data (before and
after the tests) were statistically analyzed (2-way repeated measures ANOVA, Tukey, p<0.05).
Results: RCE toothpaste produced the greatest color stability for dark tooth shade and the
second best color stability for light tooth shade. For surface roughness alteration, there was no
difference (p>0.05) for any tested toothpaste regardless of tooth shade.
Conclusions: The
experimental
Ricinus communis toothpaste did not cause color and surface roughness alteration
in the artificial teeth, and it may be considered a suitable option for denture cleaning.
