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  • Title: Microtensile bond strength of resin cements to caries-affected dentin.
    Author: Suzuki TY, Godas AG, Guedes AP, Catelan A, Pavan S, Briso AL, Dos Santos PH.
    Journal: J Prosthet Dent; 2013 Jul; 110(1):47-55. PubMed ID: 23849613.
    Abstract:
    STATEMENT OF PROBLEM: The bonding of resin materials to caries-affected dentin, especially self-adhesive cements, remains a challenge in dentistry. PURPOSE: The purpose of this study was to evaluate the bond strength of different resin cements to sound or caries-affected dentin at 24 hours and 6 months after the bonding procedure. MATERIAL AND METHODS: Thirty-six human molars were used, 18 sound and 18 affected by caries. Indirect composite resin blocks (Tescera) were bonded to dentin by using 3 different resin cements: RelyX ARC, Panavia F, and RelyX Unicem. A universal testing machine was used to measure the microtensile bond strength 24 hours and 6 months after the bonding procedure. Representative specimens were analyzed with a scanning electron microscopy. The results were submitted to 3-way analysis of variance and the Fisher test (α=.05). RESULTS: The highest values of microtensile bond strength were found with RelyX ARC for both tooth conditions (P<.001). There was no difference between RelyX Unicem and Panavia F (P>.05). There was no difference between caries-affected and sound dentin (P=.89). CONCLUSIONS: Caries did not influence the bonding strength of resin cements to dentin.
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