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Please use this identifier to cite or link to this item: http://hdl.handle.net/10481/46669

Title: SEM and AFM characterization of surface of two RMGICs for degradation before and after modification with bioactive glass ceramic
Authors: Osorio Ruiz, Estrella
Osorio Ruiz, Raquel
Zanotto, Edgar D.
Peiti, Oscar
Toledano-Osorio, Manuel
Toledano Pérez, Manuel
Issue Date: 9-Dec-2015
Abstract: Objectives: The aim of this study was to evaluate the effect of bioactive glass–ceramic particles (Biosilicate®) addition on surface nanoroughness and topography of Resin-modified glass ionomer cements (RMGICs). Methods: Experimental materials were made by incorporating 2 wt% of Biosilicate® into Fuji II LC® (FL) and Vitremer® (VT) powders. Disks of RMGICs (with and without Biosilicate®) measuring 0.5 cm (diameter) × 0.5 mm (thickness) were fabricated and polished. Samples were stored at 37 °C in dry or immersed in distilled water for 30 days. Digital images (20 × 20 μm) from the surfaces were obtained by means of an atomic force microscopy. Three images were acquired for each sample, and four nanoroughness measurements were performed in each image. Nanoroughness (Ra, nm) was assessed by Nanoscope Software V7. Data were analyzed with ANOVA and Student–Newman–Keuls multiple comparisons (p < 0.05). SEM images were obtained for surface topography analysis. Results: FL was significantly rougher than VT (p < 0.05) in wet and dry conditions. The addition of Biosilicate® increased the surface roughness in VT and decreased in FL, regardless of the storage media (p ≤ 0.05). No differences existed between materials and storage conditions after Biosilicate® addition. Significance: The Biosilicate® particles addition produced changes on the surface nanoroughness of the RMGICs. These changes depended on the particles size of the original cements in dry conditions. In water storage, dissolution of the Biosilicate® particles, a silica-rich gel formation, and a hydroxyl carbonate apatite precipitation on the surface of the materials changed the nanoroughness surface. FL was the roughest in both conditions.
Sponsorship: MINECO/FEDERMAT2014-52036-P
Publisher: Taylor and Francis
Description: “This is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Adhesion Science and Technology on 2015-10-29, available online: http://www.tandfonline.com/doi/full/10.1080/01694243.2015.1115603.”
Keywords: Resin-modified glass ionomer cement
Atomic force microscope
Scanning electron microscope
Bioactive glass
URI: http://hdl.handle.net/10481/46669
ISSN: 0169-4243
Rights : Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License
Citation: Osorio Ruiz, E.; et al. SEM and AFM characterization of surface of two RMGICs for degradation before and after modification with bioactive glass ceramic. Journal of Adhesion Science and Technology, 30(6): 621-632 (2015). [http://hdl.handle.net/10481/46669]
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