Long-term effects of seven cleaning methods on light transmittance, surface roughness, and flexural modulus of polyurethane retainer material
| Autor: | Emily Wible, Henry Lukic, Manika Agarwal, Carlotta A. Evans, Sibel Altun, Phimon Atsawasuwan, Tyler Ramir, Grace Viana, Spiro Megremis |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Light Surface Properties Scanning electron microscope Detergents Polyurethanes Orthodontics 02 engineering and technology Surface finish 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine Flexural strength Orthodontic Appliances Removable Surface roughness Transmittance Humans Orthodontic Appliance Design Denture Cleansers Composite material Polyurethane Retainer Flexural modulus Original Articles 030206 dentistry 021001 nanoscience & nanotechnology chemistry 0210 nano-technology |
| Zdroj: | Angle Orthod |
| ISSN: | 1945-7103 0003-3219 |
| DOI: | 10.2319/081517-551.1 |
| Popis: | Objectives: To evaluate the long-term effects of seven different cleaning methods on light transmittance, surface roughness, and flexural modulus of a polyurethane retainer material. Materials and Methods: Polyurethane retainer specimens (Vivera®, Align Technology Inc) (70 specimens, n = 10 per method, 50.8 mm × 12.7 mm × 1.0 mm) were exposed to seven cleaning methods twice a week for 6 months. Before treatment and after 6 months, light transmittance, surface roughness, and flexural modulus of the specimens were quantified. Qualitative assessment of randomly selected specimens from each solution was performed at baseline and after 6 months using a scanning electron microscope. Statistical analyses were performed at the .05 significance level. Results: Of the three test variables, light transmittance through the specimens was the only one that changed significantly from baseline to 6 months for all cleaning solutions, with all of them causing a decrease. However, except for 0.6% sodium hypochlorite showing a change in surface roughness values and 2.5% vinegar and toothbrushing showing an increase in flexural modulus, none of the other four cleaning methods resulted in significant changes in surface roughness or flexural modulus values for the polyurethane specimens between baseline and after 6 months. Conclusions: Of the seven cleaning methods, Invisalign® cleaning crystals, Polident®, and Listerine® showed the least amount of change in light transmittance values for the polyurethane specimens over 6 months, and they had no effect on surface roughness and flexural modulus values. |
| Databáze: | OpenAIRE |
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