| Autor: |
Vieira, Glauco Fioranelli, Arakaki, Yuri, Caneppele, Taciana Marco Ferraz |
| Předmět: |
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| Zdroj: |
Brazilian Oral Research; Jan-Mar2008, Vol. 22 Issue 1, p90-95, 6p, 1 Chart, 2 Graphs |
| Abstrakt: |
Tooth shade results from the interaction between enamel color, enamel translucency and dentine color. A change in any of these parameters will change a tooth's color. The objective of this study was to evaluate the changes occurring in enamel translucency during a tooth whitening process. Fourteen human tooth enamel fragments, with a mean thickness of 0.96 mm (± 0.3 mm), were subjected to a bleaching agent (10% carbamide peroxide) 8 hours per day for 28 days. The enamel fragment translucency was measured by a computer controlled spectrophotometer before and after the bleaching agent applications in accordance with ANSI Z80.3-1986 American National Standard for Ophthalmics nonprescription sunglasses and fashion eyewear-requirements. The measurements were statistically compared by the Mann-Whitney nonparametric test. A decrease was observed in the translucency of all specimens and, consequently, there was a decrease in transmittance values for all samples. It was observed that the bleaching procedure significantly changes the enamel translucency, making it more opaque. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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