Journal article
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, Vol.17(2), pp.627-633
03/2013
DOI: 10.1007/s00784-012-0748-7
PMID: 22576325
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 (μm2). 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 of silver nitrate penetration (89.90 ± 16.31 % and 97.14 ± 5.76 %) and deposition area (33.05 ± 12.49 and 28.08 ± 9.76 μm2). Nanoleakage was not affected by simulated aging.FS presented higher bond strength and lower nanoleakage and was not affected by simulated aging. Use of flowable resin compromised the bond strength after simulated aging.The use of an intermediate layer did not improve the dentin bond strength neither reduced nanoleakage at the gingival margins of class II restorations under simulated aging conditions.
Details
- Title: Subtitle
- Effects of three restorative techniques in the bond strength and nanoleakage at gingival wall of Class II restorations subjected to simulated aging
- Creators
- Cristina de Mattos Pimenta Vidal - Department of Restorative Dentistry, Araçatuba School of Dentistry Sao Paulo State University, UNESP Rua José Bonifácio, 1193 Vila Mendonça 16105-050 Araçatuba SP BrazilSabrina Pavan - Department of Restorative Dentistry University of Illinois at Chicago, College of Dentistry Chicago IL 60612 USAAndré Briso - Department of Restorative Dentistry Aracatuba School of Dentistry, UNESP Araçatuba SP BrazilAna Bedran-Russo - Department of Restorative Dentistry University of Illinois at Chicago, College of Dentistry Chicago IL 60612 USA
- Resource Type
- Journal article
- Publication Details
- Clinical oral investigations, Vol.17(2), pp.627-633
- Publisher
- Springer-Verlag; Berlin/Heidelberg
- DOI
- 10.1007/s00784-012-0748-7
- PMID
- 22576325
- ISSN
- 1432-6981
- eISSN
- 1436-3771
- Language
- English
- Date published
- 03/2013
- Academic Unit
- Operative Dentistry
- Record Identifier
- 9984065719602771
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