%0 Journal Article %T Tooth color change due to different etching and debonding procedures %A Ezgi Atik %A Hande Gorucu每Coskuner %A Tulin Taner %J - %@ 1945-7103 %D 2018 %R https://doi.org/10.2319/122017-872.1 %X ABSTRACT Objectives: To compare the effects of different etching techniques, 12每, 24每bladed tungsten carbide burs, and polishing discs on tooth color changes during orthodontic treatment. Materials and Methods: 59 individuals (mean age: 15.20 ㊣ 1.59 years) were divided into four groups: 37% phosphoric acid and adhesive primer was used in Groups I and II whereas self每etch primer was used in Groups III and IV for enamel preparation. After orthodontic treatment, residual adhesives were cleaned with 12每bladed tungsten carbide burs in Groups I and III, while 24每bladed tungsten carbide burs were used in Groups II and IV. All teeth were polished with medium and fine Sof每Lex XT discs (3M ESPE, St Paul, Minnesota). Color measurements were taken from upper incisors and canines at pretreatment (T0), after cleaning with tungsten carbide burs (T1) and polishing with discs (T2). Wilcoxon test was used for evaluation of L*, a*, b* changes and Kruskal每Wallis for intergroup comparison of color changes. Results: L*, a*, b* values, except a* at Groups I, II, IV, and b* at Group III, changed significantly (P < .05). Groups III and IV showed significantly different color alterations from T0 to T1 (P < .05). After polishing, tooth color alterations were not significantly different among the groups. Conclusions: In self每etch bonding groups, a 12每bladed tungsten carbide bur caused less color change than the 24每bladed tungsten carbide bur. Orthodontic treatment resulted with visible and clinically unacceptable tooth color alterations regardless of the enamel preparation and clean每up techniques. Polishing reduced the effect of tungsten carbide burs, but did not affect the total influence of orthodontic treatment on the tooth color. %K Bracket bonding Adhesive removal Tooth color Orthodontic treatment %U http://www.angle.org/doi/abs/10.2319/122017-872.1