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Influence of Cement Type and Relining Procedure on Push‐Out Bond Strength of Fiber Posts after Cyclic Loading

2015; Wiley; Volume: 25; Issue: 1 Linguagem: Inglês

10.1111/jopr.12271

1532-849X

Ana Paula Farina, Henrique Chiela, Bruno Carlini‐Júnior, Marcelo Ferraz Mesquita, Daniela Cristina Miyagaki, Caio Cézar Randi Ferraz, Cristina Vidal, Doglas Cecchin,

Dental Trauma and Treatments

The aim of this study was to evaluate the influence of cement type and relining procedure on push-out bond strength of fiber posts (FPs) after cyclic loading.Forty bovine incisor roots were divided into four groups: group 1, FP luting with RelyX Unicem; group 2, FP relined with resin composite (FPC) luting with RelyX Unicem; group 3, FP luting with RelyX ARC; group 4, FPC luting with RelyX ARC. Afterwards, half the specimens were exposed to 250,000 cycles in a controlled chewing simulator. With the other half of the specimens in each group, the push-out test was performed 24 hours after FP luting (immediate groups). All roots were sectioned transversely, producing 1-mm-thick slices, and the push-out test was performed. Statistical analysis was performed using ANOVA and the Tukey test for post hoc comparisons (α = 0.05).FPC had higher bond strengths than FP (p < 0.05). RelyX Unicem showed higher bond strength than RelyX ARC (p < 0.05). Cyclic loading did not significantly affect the bond strength value (p > 0.05).The relining procedure and the cement type are important factors for the bond strength of FPs to root dentin.