Mass loss of four commercially available heat-polymerized acrylic resins after toothbrushing with three different dentifrices


Autoria(s): FREITAS-PONTES, Karina M.; SILVA-LOVATO, Cláudia H.; PARANHOS, Helena F. O.
Contribuinte(s)

UNIVERSIDADE DE SÃO PAULO

Data(s)

26/03/2012

26/03/2012

2009

Resumo

The association between a toothbrush and a dentifrice is the most used denture cleaning method. The purpose of this study was to evaluate the abrasiveness of specific and non-specific denture cleaning dentifrices on different heat-polymerized acrylic resins. Sixteen specimens (90x30x3mm) of each acrylic resin (QC-20, Lucitone 550, Clássico, Vipi-Cril) were prepared and randomly assigned to 4 groups: 1: control (distilled water), 2: Colgate, 3: Bonyplus and 4: Dentu-Creme. The specimens were subjected to simulated toothbrushing in an automatic brushing machine using 35,600 brush strokes for each specimen. Brushing abrasion run at a 200-g load with the specimens immersed in 2:1 dentifrice/water slurry. Specimens were reconditioned to constant mass and the mass loss (mg) was evaluated. Data were analyzed by 2-way ANOVA and Tukey's test (a=0.05). Analysis of dentifrices' abrasive particles was made by scanning electron microscopy. Colgate produced the greatest mass reduction (42.44 mg, p<0.05), followed by Dentu-Creme (33.60 mg). Bonyplus was the less abrasive (19.91 mg), similar to the control group (19.69 mg) (p>0.05). The mass loss values indicated that QC-20 (33.13 mg) and Lucitone 550 (33.05 mg) resins were less (p<0.05) resistant to abrasion than Clássico (26.04 mg) and Vipi-Cril (23.43 mg). In conclusion, Colgate produced the greatest abrasion. Specific dentifrices for dentures tend to cause less damage to acrylic resins.

Identificador

Journal of Applied Oral Science, v.17, n.2, p.116-121, 2009

1678-7757

http://producao.usp.br/handle/BDPI/11079

10.1590/S1678-77572009000200009

http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572009000200009

http://www.scielo.br/pdf/jaos/v17n2/08.pdf

Idioma(s)

eng

Publicador

Faculdade De Odontologia De Bauru - USP

Relação

Journal of Applied Oral Science

Direitos

openAccess

Copyright Faculdade De Odontologia De Bauru - USP

Palavras-Chave #Acrylic resins #Brushing #Dentifrice #Abrasion
Tipo

article

original article

publishedVersion