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- Title
Preheating of resin-based flowable materials in a microwave device: a promising approach to increasing hardness and softening resistance under cariogenic challenge.
- Authors
Castillo Dutra Borges, Boniek; Silva Barreto, Adrielle; Lobelli Rangel Gomes, Cláudia; Rodrigo Santiago Freitas Silva, Talles; Alves-Júnior, Clodomiro; Vieira de Assunção Pinheiro, Isauremi; Braz, Rodivan; Japiassú Resende Montes, Marcos Antônio
- Abstract
This study aimed to evaluate whether preheated resin-based flowable restoratives would show increased hardness and softening susceptibility after an early cariogenic challenge. Fluroshield-Yellowed, Bioseal, Wave, Master Flow, Fluroshield-White, Conseal F, Filtek Z350 Flow, and Opallis Flow were tested. Preheating was performed using a microwave device. Five specimens of each preheated or room temperature material (n = 5) were fabricated. Hardness was assessed before and after a cariogenic challenge. The analysis was done by two-way analysis of variance (ANOVA) with repeated measures (cariogenic challenge) and Tukey's test for multiple comparisons (α = 0.05). The preheated Fluroshield Yellowed, Wave A2, Conseal F White, and Opallis Flow OA3.5 presented significantly higher Vickers hardness values than the room-temperature specimens. The Opallis Flow OA3.5 presented significantly high hardness values for all experimental conditions, whereas the Conseal F White had significantly lower values than all others. The majority of the preheated samples presented significantly greater resistance to softening after cariogenic challenge. Therefore, preheating of some resin-based flowable restoratives is a promising approach to improving hardness and softening resistance after cariogenic challenge.
- Subjects
DENTAL resins; HARDNESS; MICROWAVE heating; ANALYSIS of variance; TUKEY'S test; MULTIPLE comparisons (Statistics); DENTIN; DENTAL pulp
- Publication
European Journal of Esthetic Dentistry, 2013, Vol 8, Issue 4, p558
- ISSN
1862-0612
- Publication type
Article