Gomes Lucianna de Oliveira, Mathias Paula, Rizzo Patricia, de Araújo Telma Martins, Cangussu Maria Cristina Teixeira
Graduate Program in Orthodontics, Federal University of Bahia (UFBa), Brazil.
Dental Press J Orthod. 2013 Mar-Apr;18(2):61-8. doi: 10.1590/s2176-94512013000200015.
To evaluate the influence of bonding and debonding of orthodontic brackets on dental in-home bleaching, taking into account three different adhesive systems.
Forty-four bovine incisors were divided into four groups according to the primer system used for orthodontic bracket bonding. Following the debonding of orthodontic brackets, the teeth were stored in staining solution for 96 hours. Then, teeth were whitened using 10% carbamide peroxide for two weeks at a 6-hour-a-day regime. Standardized digital photographs were taken at the following intervals: T₀ (initial); T₁ (after debonding); T₂ (after pigmentation); T₃, T₄ and T₅ representing 1, 7, and 14 days of bleaching. Repeatability and stability tests were carried out to check the method accuracy. Images were analyzed using Adobe Photoshop 7.0 software considering (Lab*) color coordinate values and a modified color difference total (ΔE').
The results of this study (ANOVA and Tukey; p < 0.01) demonstrated that after 7 days of bleaching, experimental groups showed significantly less teeth whitening compared to the control group. However, there were no significant color differences between the groups after 14 days, according to values of lightness (L*).
Regardless of the adhesive primer system applied, bonding and debonding of orthodontic brackets alters the outcome of tooth whitening in the first 7 days of bleaching, however it has no influence on the whitening of the dental structure after 14 days of in-home dental bleaching with 10% carbamide peroxide.
考虑三种不同的粘结系统，评估正畸托槽粘结和脱粘对家庭牙齿美白的影响。
根据用于正畸托槽粘结的底漆系统，将44颗牛切牙分为四组。正畸托槽脱粘后，将牙齿储存在染色溶液中96小时。然后，使用10%的过氧化脲，按照每天6小时的方案对牙齿进行两周的美白处理。在以下时间间隔拍摄标准化数码照片：T₀（初始）；T₁（脱粘后）；T₂（色素沉着后）；T₃、T₄和T₅分别代表漂白1、7和14天。进行重复性和稳定性测试以检查方法的准确性。使用Adobe Photoshop 7.0软件，根据（Lab*）颜色坐标值和修正的总色差（ΔE'）对图像进行分析。
本研究结果（方差分析和Tukey检验；p < 0.01）表明，漂白7天后，实验组牙齿美白程度明显低于对照组。然而，根据亮度（L*）值，14天后各组之间没有显著的颜色差异。
无论应用何种粘结底漆系统，正畸托槽的粘结和脱粘在漂白的前7天会改变牙齿美白的效果，但在用10%过氧化脲进行14天家庭牙齿漂白后，对牙齿结构的美白没有影响。
