Arcoverde School of Dentistry, University of Pernambuco (UPE), Arcoverde, Pernambuco, Brazil.
Department of Dental Materials and Prosthodontics, Ribeirão Preto School of Dentistry, University of São Paulo (FORP/USP), Ribeirão Preto, São Paulo, Brazil.
J Esthet Restor Dent. 2021 Jun;33(4):668-674. doi: 10.1111/jerd.12732. Epub 2021 Apr 26.
To evaluate the color change and tooth whitening perception in 2 and 3 mm dental specimens simulating the orthodontic bracket for a 14-day period.
Forty bovine tooth fragments (8 × 7 mm) of 2 mm (G2, n = 20) and 3 mm (G3, n = 20) were divided into Control (C: without bracket simulation and whitening) and Experimental (E: with composite resin simulating orthodontic bracket cementation area). Analyses of color change (ΔE ) and perception of tooth whitening (WI ) were performed before (T ) and after (T ) the first bleaching session; before (T ) and after (T ) the second bleaching session; and after 7 days of the second bleaching session (T ).
After 14 days (T4), ΔE and WI showed similarity results, except for G2C and G3E The thickness did not influence the ΔE and WI (G2C = G3C and G2E = G3E). The presence of orthodontic bracket did not interfere in the color change or tooth whitening perception after 14 days, except for comparison of G2C and G3E. Additionally, dentin thickness did not influence the color change.
Teeth with orthodontic brackets showed similar color change and whitening perception to teeth without orthodontic bracket, but it is not influenced by dentin thickness.
评估模拟正畸托槽的 2 和 3 毫米牙科样本在 14 天内的颜色变化和牙齿美白感知。
将 40 个牛牙碎片（8×7 毫米）分为 2 毫米（G2，n=20）和 3 毫米（G3，n=20）两组，分为对照组（C：不模拟正畸托槽和美白）和实验组（E：用复合树脂模拟正畸托槽粘接区）。在第一次漂白疗程前后（T）、第二次漂白疗程前后（T）和第二次漂白疗程后 7 天（T）进行颜色变化分析（ΔE）和牙齿美白感知（WI）分析。
14 天后（T4），除 G2C 和 G3E 外，ΔE 和 WI 显示出相似的结果。厚度不影响 ΔE 和 WI（G2C=G3C 和 G2E=G3E）。正畸托槽的存在在 14 天后不会干扰颜色变化或牙齿美白感知，除了 G2C 和 G3E 的比较。此外，牙本质厚度不影响颜色变化。
带有正畸托槽的牙齿与不带正畸托槽的牙齿具有相似的颜色变化和美白感知，但不受牙本质厚度的影响。
