PMID- 28944377 OWN - Quintessenz Verlags-GmbH CI - Copyright Quintessenz Verlags-GmbH OCI - Copyright Quintessenz Verlags-GmbH TA - J Adhes Dent JT - The Journal of Adhesive Dentistry IS - 1757-9988 (Electronic) IP - 5 VI - 19 PST - ppublish DP - 2017 PG - 409-416 LA - en TI - Mini-interfacial Fracture Toughness of a Multimode Adhesive Bonded to Plasma-treated Dentin LID - 10.3290/j.jad.a38999 [doi] FAU - Ayres, Ana Paula Almeida AU - Ayres A FAU - Pongprueksa, Pong AU - Pongprueksa P FAU - De Munck, Jan AU - De Munck J FAU - Gré, Cristina Parise AU - Gré C FAU - Nascimento, Fábio Dupart AU - Nascimento F FAU - Giannini, Marcelo AU - Giannini M FAU - Van Meerbeek, Bart AU - Van Meerbeek B CN - OT - plasma OT - dentin OT - bonding OT - interface OT - multimode adhesive OT - fracture toughness AB - Purpose: To investigate the bonding efficacy of a multimode adhesive to plasma-treated and -untreated (control) dentin using a mini-interfacial fracture toughness (mini-iFT) test. Materials and Methods: Twenty human molars were used in a split-tooth design (n = 10). The adhesive Scotchbond Universal (SBU; 3M ESPE) was applied in etch-and-rinse (E&R) and self-etch (SE) modes. Mid-coronal dentin was exposed and covered with a standardized smear layer ground to 320 grit. One half of each dentin surface received 15 s of non-thermal atmospheric plasma (NTAP), while the other half was covered with a metallic barrier and kept untreated. Following the E&R mode, dentin was plasma treated immediately after phosphoric acid etching. SBU and a resin-based composite were applied to dentin following the manufacturer's instructions. Six mini-iFT specimens were prepared per tooth (1.5 x 2.0 x 16 to 18 mm), and a single notch was prepared at the adhesive-dentin interface using a 150-μm diamond blade under water cooling. Half of the mini-iFT specimens were immediately loaded until failure in a 4-point bending test, while the other half were first stored in distilled water for 6 months. After testing, the exact dimensions of the notch were measured with a measuring optical microscope, from which ΚIc was determined. Results: Three-way ANOVA revealed higher mini-iFT for SBU applied in E&R than SE mode for both storage times, irrespective of NTAP treatment. Conclusion: Overall, mini-iFT did not decrease for any of the experimental groups upon 6-month aging, while plasma treatment did not show a direct beneficial effect on mini-iFT of SBU applied in either E&R or SE mode. AID - 843376