Effects of three restorative techniques in the bond strength and nanoleakage at gingival wall of Class II restorations subjected to simulated aging.

Clinical Oral Investigations
Cristina de Mattos Pimenta VidalAna Karina B Bedran-Russo

Abstract

To evaluate the effects of simulated aging in bond strength and nanoleakage of class II restorations using three different restorative techniques. Class II preparations (n = 12) were restored using: FS - composite resin Filtek Supreme Plus (3M/ESPE); RMGIC + FS - resin-modified glass ionomer cement Vitrebond Plus (3M/ESPE) + FS; and FFS + FS - flowable composite resin Filtek Supreme Plus Flowable (3M ESPE) + FS. The teeth were assigned into two groups: Control and Simulated Aging - Thermal/Mechanical cycling (3,000 cycles, 20-80 °C/500,000 cycles, 50 N). From each tooth, two slabs were assessed to microtensile bond strength test (μTBS) (MPa), and two slabs were prepared for nanoleakage assessment, calculated as penetration along the restoration margin considering the penetration length (%) and as the area of silver nitrate particle deposition (μm(2)). Data were analyzed by two-way analysis of variance (ANOVA) followed by Tukey's post hoc test (p < 0.05). FS presented the highest μTBS to dentin (22.39 ± 7.55 MPa) after simulated aging, while the presence of flowable resin significantly decreased μTBS (14.53 ± 11.65 MPa) when compared to no aging condition. Both control and aging groups of RMGIC + FS presented the highest values ...Continue Reading

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Citations

Aug 13, 2015·Operative Dentistry·F Al-HarbiM El Gezawi
Mar 13, 2016·Clinical Oral Investigations·Dayana Da Silva GonçalvesMª Victoria Fuentes
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Dec 24, 2018·Journal of Biomedical Materials Research. Part B, Applied Biomaterials·Chao Zhang, Bin Yang
Aug 28, 2021·Clinical Oral Investigations·Cleber Paradzinski CavalheiroTathiane Larissa Lenzi

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