Effect of surface treatment of fiberglass posts on bond strength to root dentin
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Data
2014
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Resumo
his study evaluated the influence of the surface treatments of fiberglass posts on bond
strength to root dentin using push-out test. Forty bovine incisor roots were endodontically
treated. The surface of the fiberglass posts (Exacto #2, Angelus) were treated using 4
different protocols (n=10): Control - 70% ethanol for 1 min; 37% phosphoric acid for 1
min; 10% hydrofluoric acid for 1 min; and 24% hydrogen peroxide for 1 min. After a silane
coupling agent was applied for 1 min and all posts were cemented using self-adhesive
resin cement (RelyX Unicem, 3M-ESPE). The roots were sectioned and two 1-mm-thick
slices were obtained from each third: cervical, middle and apical. The specimens were
subjected to the push-out test with a crosshead speed of 0.5 mm/min. Data were analyzed
by repeated measures ANOVA followed by Tukey's HSD tests (α=0.05). The surface
treatment (p<0.001) and root third region (p=0.007) factors were significant. The retention
to root canal was affected by surface treatment type. The post surface treatment with
24% hydrogen peroxide for 1 min yielded significantly higher bond strength when the
fiberglass posts were cemented with RelyX Unicem.
Descrição
Palavras-chave
Surface treatments, Fiberglass posts, Push-out test, Self-adhesive resin cement
Citação
VALDIVIA, Andréa Dolores Correia Miranda et al. Effect of surface treatment of fiberglass posts on bond strength to root dentin. Brazilian Dental Journal, Ribeirão Preto, v. 25, n. 4, p. 314-320, 2014.