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  • Title: Effect of three endodontic sealers on the bond strength of prefabricated fiber posts luted with three resin cements.
    Author: Aleisa K, Alghabban R, Alwazzan K, Morgano SM.
    Journal: J Prosthet Dent; 2012 May; 107(5):322-6. PubMed ID: 22546310.
    Abstract:
    STATEMENT OF PROBLEM: There is limited information in the literature regarding the effect of eugenol-based sealers on the bond strength of resin-bonded endodontic posts. PURPOSE: The purpose of this study was to evaluate the effect of 1 resin-based and 2 different eugenol-based endodontic sealers on the bond strength of prefabricated fiber posts luted with 3 different resin cements. MATERIAL AND METHODS: One hundred thirty-five prefabricated fiber posts were luted into extracted single-rooted teeth with 1 of 3 composite resin cements (Rely X Unicem, Paracore, and Variolink II). Specimens were divided into 3 groups with 45 teeth each. The first 2 groups were obturated with gutta percha and 1 of 2 eugenol-based endodontic sealers (Endofil, Tubli-Seal). The third group was obturated with a resin-based root canal sealer (AH26). The forces required for dislodgment of posts from their prepared post spaces were recorded by using a universal testing machine. Data were collected and a 2-way ANOVA was applied to the mean retentive strengths of various combinations of sealer and cement. A Tukey multiple comparison test was performed to determine which groups were significantly different (α=.05). RESULTS: Endofil and Tubli-Seal (eugenol-based sealers) groups had significantly lower bond strengths for the posts than the AH26 group (P<.001). There was no significant difference between the means of post bond strength for the Endofil and Tubli-Seal groups. There was significant difference among the means of post bond strength for all 3 cement groups (P<.05). CONCLUSIONS: Endofil and Tubli-Seal (eugenol-based) sealers demonstrated significantly reduced mean bond strength for prefabricated fiber posts luted with resin cement. Rely X Unicem resin cement exhibited higher mean bond strength than with Paracore and Variolink II resin cements when a eugenol sealer was used.
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