Effect of thermal cycling on denture base and autopolymerizing reline resins
Carregando...
Arquivos
Data
2013-05-01
Autores
Silva, Cíntia de Souza [UNESP]
Machado, Ana Lucia [UNESP]
Chaves, Carolina de Andrade Lima [UNESP]
Pavarina, Ana Claudia [UNESP]
Vergani, Carlos Eduardo [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Resumo
Objective: This study evaluated the fracture toughness (FT) of denture base and autopolymerizing reline resins, with and without thermocycling (T). Material and Methods: Specimens of each material (denture base acrylic resin - Lucitone 550 - L; autopolymerizing reline resins - Ufi Gel Hard-UH, Tokuyama Rebase II-TR, New Truliner-NT and Kooliner-K), were produced, notched and divided into two groups (n = 10): CG (control group of autopolymerizing reline resins and L): FT tests were performed after polymerization; TG (thermocycled group): FT tests were performed after T (5°C and 55°C for 5,000 cycles). Results: Results (MPa.m1/2) were analyzed by two-way ANOVA and Tukey's test (p=0.05). L exhibited the highest FT mean values in both groups (CG - 2.33; TG -2.17). For the CG groups, NT showed the highest FT (1.64) among the autopolymerizing reline resins, and K the lowest (1.04). After T, when the autopolymerizing reline resins were compared, a statistically significant difference in FT was found only between the NT (1.46) and TR (1.00). Conclusions: Thermocycling increased the FT of K and did not influence the FT of L, UH, TR and NT.
Descrição
Palavras-chave
Acrylic resins, Denture bases, Thermic treatment
Como citar
Journal of Applied Oral Science, v. 21, n. 3, p. 219-224, 2013.