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Title: Mini-interfacial fracture toughness of a multimode adhesive bonded to plasma-treated dentin
Authors: Ana Paula Almeida Ayres
Pong Pongprueksa
Jan De Munck
Cristina Parise Gré
Fábio Dupart Nascimento
Marcelo Giannini
Bart Van Meerbeek
KU Leuven– University Hospital Leuven
Piracicaba Dental School
Mahidol University
Universidade de Mogi das Cruzes
Universidade Estadual de Campinas
Keywords: Dentistry
Issue Date: 1-Jan-2017
Citation: Journal of Adhesive Dentistry. Vol.19, No.5 (2017), 409-416
Abstract: © Quintessenz. 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 adhesivedentin 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 KIcwas 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.
ISSN: 17579988
Appears in Collections:Scopus 2016-2017

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