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- Title
Studiu in-vitro privind colorarea diferitelor tipuri de bracketuri ortodontice estetice sub acţiunea coloranţilor alimentari.
- Authors
Roman, Florina; Suciu, Victor; Păcurar, Mariana
- Abstract
The aim of this in vitro study is to measure the color stability of different types of brackets exposed to the action of solutions with coloring potential over a certain period of time. Material and method: 45 aesthetic orthodontic brackets of 3 different types (15 from monocrystalline ceramic, 15 from polycrystalline ceramic, 15 from polymer resins) were inserted into 5 types of substances (coffee, black tea, red wine, physiological serum-control negative or iodinated substance-positive control).Coloration was measured initially, at 6 and 14 days by photography, color measurement by both direct visual control and Colorpicker software, then color coding and digital image analysis by CIELAB software. Results: in the CIELAB system on the L-axis slightly decreased values are observed after immersion in tea or coffee and an important value change in the case of wine, which denotes a sharp decrease in brightness; on the a-axis positive value changes are observed for tea, coffee and iodine, meaning the color change to green; and a sharp increase in the case of wine, which denotes a strong change towards red; and on axis b the values of the brackets immersed in coffee or tea are slightly increased or similar to those of the negative sample, very low values being determined for the brackets in wine signifying a change towards blue. Wine determines the most pronounced changes on all three axes of the system CIELAB color, values with strong statistical significance. Conclusions: perceptible unaesthetic color changes of all tested brackets were observed, both after six days and after fourteen days of storage in substances with coloring potential, the changes being progressive, in direct relation to the contact time. Among the substances tested, wine caused by far the most pronounced color changes in all brackets studied, followed by black tea and coffee. Brackets showed variable stability to staining depending on the material composition.
- Publication
dentalTarget, 2022, Vol 17, Issue 3/4, p31
- ISSN
1842-5054
- Publication type
Article