The effects of intrinsic and extrinsic acids on nanofilled and bulk fill resin composites: Roughness, surface hardness, and scanning electron microscopy analysis
| Autor: | Mirella T Pereira, Sérgio Lima Santiago, Milena F Alencar, Maria Denise Rodrigues de-Moraes, Vanara Florêncio Passos |
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| Rok vydání: | 2019 |
| Předmět: |
Histology
Materials science Surface Properties Scanning electron microscope Hydrochloric acid 02 engineering and technology Surface finish Composite Resins Indentation hardness Dental Materials 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Hardness Materials Testing Immersion (virtual reality) Surface roughness Composite material Instrumentation 030206 dentistry 021001 nanoscience & nanotechnology Medical Laboratory Technology chemistry Microscopy Electron Scanning Profilometer Anatomy 0210 nano-technology Acids |
| Zdroj: | Microscopy Research and Technique. 83:202-207 |
| ISSN: | 1097-0029 1059-910X |
| DOI: | 10.1002/jemt.23403 |
| Popis: | The objective of this study was to examine the effects of extrinsic or intrinsic acids on nanofilled and bulk fill resin materials in vitro. A total of 90 disks were prepared using dental restorative material (Filtek Z350XT, GrandioSO, Filtek Bulk Fill, X-tra fil). Thirty disks of each material were sub-divided into three groups (n = 10) that were immersed for 7 days in deionized water (DW), 5% citric acid (CA-pH 2.1), or 0.1% hydrochloric acid (HCl-pH = 1.2). Surface hardness and roughness (stylus profilometer by Ra parameter) analysis were performed before and after immersion. Morphological changes were evaluated by scanning electron microscopy. The data were analyzed by two-way ANOVA and Tukey's test (α = 0.05). All tested materials did not show significant differences in the effects of the DW, CA, or HCl solutions on surface roughness (p = .368). Likewise, the hardness loss was not affected by the solutions tested (p = .646), but there was a difference in the resin type (p = .002). Filtek Bulk Fill resin hardness was less affected, while Filtek Z350XT and GrandioSO presented the most hardness loss after 7 days of solution immersion. In terms of this experimental study, the results demonstrate the effectiveness of the mechanical properties (roughness and hardness surface) of nanofilled and bulk fill resin materials to resist erosion from extrinsic and intrinsic acids, therefore being potential candidates for dental applications. |
| Databáze: | OpenAIRE |
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