Effect of Alkaline Peroxides on the Surface of Cobalt Chrome Alloy: An In Vitro Study
| Autor: | Glenda Lara Lopes Vasconcelos, Patricia Almeida Curylofo, Priscilla Neves Raile, Ana Paula Macedo, Valéria Oliveira Pagnano, Helena de Freitas Oliveira Paranhos |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Scanning electron microscope 0206 medical engineering Alloy chemistry.chemical_element Cobalt-chrome 030206 dentistry 02 engineering and technology engineering.material 020601 biomedical engineering Ion Metal 03 medical and health sciences 0302 clinical medicine chemistry Molybdenum Cleanser visual_art Surface roughness engineering visual_art.visual_art_medium General Dentistry Nuclear chemistry |
| Zdroj: | Journal of Prosthodontics. 28:e337-e341 |
| ISSN: | 1059-941X |
| Popis: | PURPOSE Removable denture hygiene care is very important for the longevity of the rehabilitation treatment; however, it is necessary to analyze the effects that denture cleansers can cause on the surfaces of prostheses. Thus, this study evaluated the effect of alkaline peroxide-effervescent tablets on the surface of cobalt-chromium alloys (Co-Cr) used in removable partial dentures. MATERIALS AND METHODS Circular metallic specimens (12 × 3 mm) were fabricated and were immersed (n = 16) in: control, Polident 3 Minute (P3M), Steradent (S), Efferdent (E), Polident for Partials (PFP), and Corega Tabs (CT). The surface roughness (μm) (n = 10) was measured before and after periods of cleanser immersion corresponding to 0.5, 1, 2, 3, 4, and 5 years. Ion release was analyzed (n = 5) for Co, Cr, and molybdenum (Mo). Scanning electron microscopy (SEM) analysis and an Energy-dispersive X-ray spectroscopy (EDS) were conducted in one specimen. The surface roughness data were statistically analyzed (α = 0.05) with the Kruskal-Wallis test to compare the solutions, and the Friedman test compared the immersion durations. Ion release analysis was performed using 2-way ANOVA and Tukey's test. RESULTS There was no significant surface roughness difference when comparing the solutions (p > 0.05) and the immersion durations (p = 0.137). Regarding ion release (μg/L), CT, E, and control produced a greater release of Co ions than S (p < 0.05). CT produced a greater release of Cr ions than control, S, and P3M (p < 0.05). Finally, E caused the greatest release of Mo ions (p < 0.05). SEM confirmed that the solutions did not damage the surfaces and EDS confirmed that there were no signs of oxidation. CONCLUSION The various solutions tested did not have any deleterious effects on the Co-Cr alloy surface. Steradent, however, presented the smallest ionic release. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text