Can the Cure Time of Endodontic Sealers Affect Bond Strength to Root Dentin?

Brazilian Dental Journal

Gabriela Campos Mesquita¹  Crisnicaw Verissimo¹  Luis Henrique Araujo Raposo¹  Paulo Cesar Freitas Santos-filho¹  Aderito Soares Da Mota¹  Carlos Jose Soares¹ 

关键词: bond strength;    endodontic cement;    fiberglass post;    intraradicular dentin;    resin cements;   

DOI  :  10.1590/0103-6440201302246

来源: SciELO

【 摘 要 】

The cure time of endodontic sealers may influence the bond strength of fiber posts to root dentin. Forty teeth were selected and endodontically filled using calcium hydroxide cement and then divided into 2 groups according to the time elapsed between endodontic filling and post luting (n = 20): Immediately - glass fiber post luting immediately after endodontic filling; and Delayed - post luting performed 7 days after endodontic filling. The roots were also subdivided according to resin cement used for post luting (RelyX ARC and RelyX Unicem). The specimens were stored at 37°C for 24 h and sectioned in six 1-mm-thick slices from cervical, middle and apical thirds. The slice specimens were submitted to a push-out test at a crosshead speed of 0.5 mm/min, and the bond strength values obtained (MPa) were submitted to two-way ANOVA in a split-plot arrangement and Tukey's test (α=0.05). For both RelyX ARC and Unicem, the bond strength was significantly higher when the posts were cemented 7 days after the endodontic treatment. RelyX Unicem showed significantly higher bond strength values than RelyX ARC for both cementation periods. It was concluded that post luting should be made after the complete setting of the root canal sealer. Self-adhesive resin cement should be preferred for fiber post luting.

【 授权许可】

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