Spectrophotometric assessment of the effects of 10% carbamide peroxide on enamel translucency.
Tooth shade results from the interaction between enamel color, enamel translucency and dentine color. A change in any of these parameters will change a tooths 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 non-parametric 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.
Vieira
Glauco Fioranelli
GF
Department of Restorative Dentistry, School of Dentistry, University of São Paulo, São Paulo, Brazil.
Arakaki
Yuri
Y
Caneppele
Taciana Marco Ferraz
TM
D000077463:Carbamide Peroxide; D003116:Color; D003124:Colorimetry; D003743:Dental Enamel / Q000187:drug effects*; D003804:Dentin / Q000737:chemistry / Q000187:drug effects; D004338:Drug Combinations; D006801:Humans; D066298:In Vitro Techniques; D008027:Light; D016877:Oxidants / Q000494:pharmacology*; D010545:Peroxides / Q000494:pharmacology* / Q000627:therapeutic use; D013053:Spectrophotometry; D014073:Tooth Bleaching / Q000379:methods*; D014075:Tooth Discoloration / Q000628:therapy; D014508:Urea / Q000031:analogs & derivatives* / Q000494:pharmacology / Q000627:therapeutic use
D004338:Drug Combinations; D016877:Oxidants; D010545:Peroxides; D000077463:Carbamide Peroxide; D014508:Urea