Department of Orthodontics, Faculty of Dentistry, University of Akdeniz, Antalya, Turkey.
Angle Orthod. 2013 Jul;83(4):686-90. doi: 10.2319/071812-586.1. Epub 2012 Dec 4.
To evaluate the effects of different bleaching methods on the shear bond strength (SBS) of orthodontic brackets.
Forty-five freshly extracted premolars were randomly divided into three groups (n = 15 per group). In group I, bleaching was performed with the office bleaching method. In group II, bleaching was performed with the home bleaching method. Group III served as the control. Orthodontic brackets were bonded with a light cure composite resin and cured with an LED light. After bonding, the SBS of the brackets were tested with a Universal testing machine.
Analysis of variance indicated a significant difference between groups (P < .001). The highest values for SBS were measured in group III (20.99 ± 2.32 MPa). The SBS was significantly lower in groups I and II than in group III (P < .001). The lowest values for SBS were measured in group II (6.42 ± 0.81 MPa). SBS was significantly higher in group I than in group II (P < .001).
Both of the bleaching methods significantly affected the SBS of orthodontic brackets on human enamel. Bleaching with the home bleaching method affected SBS more adversely than did bleaching with the office bleaching method.
评估不同漂白方法对正畸托槽粘结强度（SBS）的影响。
将 45 颗新鲜拔出的前磨牙随机分为三组（每组 n = 15）。在组 I 中，使用诊室漂白法进行漂白。在组 II 中，使用家庭漂白法进行漂白。组 III 作为对照组。用光固化复合树脂将正畸托槽粘合并用 LED 光固化。粘结后，用万能试验机测试托槽的 SBS。
方差分析表明组间存在显著差异（P <.001）。SBS 的最高值在组 III 中测量（20.99 ± 2.32 MPa）。组 I 和 II 的 SBS 明显低于组 III（P <.001）。SBS 的最低值在组 II 中测量（6.42 ± 0.81 MPa）。组 I 的 SBS 明显高于组 II（P <.001）。
两种漂白方法均显著影响人牙釉质上正畸托槽的 SBS。家庭漂白法比诊室漂白法对 SBS 的影响更不利。
