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Quintessence Publishing: Journals: JAD

 

The Journal of Adhesive Dentistry

Edited by Prof. Dr. Roland Frankenberger, Prof. Bart Van Meerbeek

ISSN (print) 1461-5185 • ISSN (online) 1757-9988

Publication:

May/June 2015
Volume 17 , Issue 3



Pages: 265-271
PMID: 26159130
DOI: 10.3290/j.jad.a34414
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Influence of 3-month Simulated Pulpal Pressure on the Microtensile Bond Strength of Simplified Resin Luting Systems

Ataís Bacchi / Gabriel Abuna / Ashvin Babbar / Mário Alexandre Coelho Sinhoreti / Victor Pinheiro Feitosa

Purpose: To assess the influence of simulated pulpal pressure (SPP) on the microtensile bond strength (μTBS) of four simplified luting strategies to indirect composite restorations.

Materials and Methods: Dentin disks from 40 human molars were prepared and treated with 4 different techniques: (1) SB+ARC: two-step etch-and-rinse adhesive + conventional dual-curing resin cement (Adper Single Bond 2 + RelyX ARC, 3M ESPE); (2) ED+PAN: self-etching primer + conventional dual-curing resin cement (ED Primer + Panavia F2.0, Kuraray Medical); (3) S3+PAN: one-step self-etching adhesive (Clearfil S3, Kuraray) + Panavia F2.0; (4) U200: self-adhesive resin cement (RelyX U200, 3M ESPE). Pre-made indirect composite restorations (Filtek Z100, 3M ESPE) were luted onto the specimens. The luted specimens were cut into resin-dentin beams and the μTBS was tested after two different aging regimes: water storage at 37°C for one week (control) or three months under 20 cm H2O simulated pulpal pressure (SPP). The μTBS data was analyzed with two-way ANOVA and Tukey’s test (p < 0.05).

Results: SB+ARC showed significantly higher μTBS after both aging regimes (p < 0.001). The statistically significantly lowest μTBS was measured for control S3+PAN and U200 after 3 months SPP (p < 0.001). S3+PAN was the only group not negatively affected by SPP (p = 0.699).

Conclusions: Two-step etch-and-rinse adhesives associated with dual-curing conventional resin cements may achieve the highest μTBS, even after 3 months of SPP. The one-step self-etching adhesive along with the dualcuring conventional resin cement was able to maintain bond stability.

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