Abrasiveness of conventional and specific denture-cleansing dentifrices.
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.
Department of Dental Materials and Prosthodontics, Ribeirão Preto Dental School, University of São Paulo.
Danilo Balero
DB
Sorgini
Claudia Helena da
CH
Silva-Lovato
Raphael Freitas
RF
de Souza
Letícia Resende
LR
Davi
Helena de Freitas Oliveira
Hde F
Paranhos
D000704:Analysis of Variance; D003802:Dentifrices / Q000737:chemistry*; D003820:Denture Cleansers / Q000737:chemistry*; D003824:Denture, Complete; D008422:Materials Testing; D019904:Polymethyl Methacrylate; D013499:Surface Properties; D014072:Tooth Abrasion; D014099:Toothbrushing
D003802:Dentifrices; D003820:Denture Cleansers; D019904:Polymethyl Methacrylate