Comparative assessment of different recycling methods of orthodontic brackets for clinical use
| Autor: | M. Ayla, de Oliveira Correia, Felipe de Souza Matos, Renata Pilli Jóias, Sigmar de Mello Rode, Paulo F. Cesar, Luiz R. Paranhos |
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| Rok vydání: | 2017 |
| Předmět: |
Dental Stress Analysis
Materials science Orthodontic Brackets 020209 energy 02 engineering and technology Dental bonding 010501 environmental sciences 01 natural sciences Hydrofluoric Acid chemistry.chemical_compound Random Allocation Hydrofluoric acid Materials Testing 0202 electrical engineering electronic engineering information engineering Shear strength Aluminum Oxide Humans Bisphenol A-Glycidyl Methacrylate Recycling Composite material Acrylic resin Device Removal 0105 earth and related environmental sciences Universal testing machine Bond strength Bracket Dental Bonding Silanes Otorhinolaryngology chemistry visual_art visual_art.visual_art_medium Microscopy Electron Scanning Surgery Equipment Failure Direct shear test Oral Surgery Shear Strength |
| Zdroj: | Minerva stomatologica. 66(3) |
| ISSN: | 1827-174X |
| Popis: | BACKGROUND This study aimed to assess bond strength of the resin/bracket interface, under in-vitro shear stress, of metal brackets recycled by different clinical protocols. METHODS Sixty stainless steel orthodontic brackets were bonded on acrylic resin. The Transbond XT™ resin was applied at the base of the bracket aided by a matrix, obtaining 1 mm of thickness, and photoactivated with a LED device (40 s; 500 mW/cm2). Samples were randomly divided into four groups (N.=15) according to the reconditioning/recycling protocol: aluminum oxide (AO) 90 µm; hydrofluoric acid 60 s (HA60); hydrofluoric acid 120 s (HA120); hydrofluoric acid 60 s + silane (HA60S). After recycling, the resin was applied at the base of the bracket for shear testing in a universal testing machine (0.5 mm/min). After reconditioning/recycling, the surfaces were analyzed by Scanning Electron Microscopy. Data obtained after the shear test were subjected to ANOVA and Tukey's test (P |
| Databáze: | OpenAIRE |
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