Effect of Surface Treatment of Fiberglass Posts on Bond Strength to Root Dentin

Brazilian Dental Journal

Andréa Dolores Correia Miranda Valdivia¹  Veridiana Resende Novais¹  Murilo De Sousa Menezes¹  Marina Guimarães Roscoe¹  Carlos Estrela¹  Carlos José Soares¹ 

关键词: surface treatments;    fiberglass posts;    push-out test;    self-adhesive resin cement;   

DOI  :  10.1590/0103-6440201300143

来源: SciELO

【 摘 要 】

This 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 (=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.

【 授权许可】

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