Effect of water storage on resin-dentin bond strengths formed by different bonding approaches

• Main Authors: Martins G (Author), Calixto A (Author), Gomes OMM (Author), Loguercio A (Author), D′Alpino PHP (Author), Reis A (Author)
• Format: Book
• Published: Wolters Kluwer Medknow Publications, 2009-01-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.

Summary

<b>Objectives:</b> The purpose of this study was to evaluate the influence of water storage on resin-dentin bond strengths [&#181;TBS] using different adhesive bonding approaches. <b> Materials and Methods:</b> Flat superficial dentin surfaces of 24 extracted human third molars were exposed and polished to create a standardized smear layer. The teeth were randomly distributed into four different groups: Three-step etch-and-rinse (Adper Scotchbond Multi-Purpose, 3M ESPE - SBMP), two-step etch-and-rinse (Adper Single Bond 2, 3 M ESPE - SB); two-step self-etch (AdheSE, Ivoclar/Vivadent - AD); and self-etch 1 step (Adper Prompt L-Pop, 3M ESPE - LP). Following the adhesive application (n = 6), resin composite was incrementally applied (Filtek&#8482; Supreme XT - 3 M ESPE) in order to obtain bonded sticks, with a cross-sectioned area of 0.81 mm² . The bonded sticks were randomly divided and assigned to be tested after one day [OD] (n 30) or six months [6 M] of water storage [6 M] (n = 30). <b> Results:</b> Two-way ANOVA and Tukey&#x2032;s test showed that none of the adhesives showed degradation after 6 M. SB achieved the highest &#181;TBS both in the [OD] (49.13 MPa) and [6M] (40.27 MPa). Despite the highest values in both time evaluations, the &#181;TBS of SB significantly reduced after 6M. LP showed the lowest &#181;TBS in both periods of evaluation (18.35 and 18.34 MPa). <b>Conclusions:</b> Although a significant degradation was only observed for SB, this was the adhesive that showed the highest &#181;TBS after 6 M of water storage.

Item Description

0970-9290
1998-3603