Influence of Tooth Whitening After Resin Infiltration on the Shear Bond Strength of Orthodontic Brackets.

IF 2.7

The journal of adhesive dentistry Pub Date : 2026-08-05 DOI:10.3290/j.jad.c_2772

Christoph Matthias Schoppmeier, Li Sun, Malin Janson, Isabelle Graf, Bert Braumann, Max von Kohout, Anna Greta Barbe, Michael Jochen Wicht

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Abstract

Purpose: To determine the influence of different bleaching methods on the shear bond strength (SBS) of orthodontic brackets bonded to resin-infiltrated (Icon, DMG) extracted human enamel.

Methods and materials: 64 extracted wisdom teeth were randomized into four groups (n = 16): 1. (-)control (no treatment), 2. (+)control (RI), 3. RI followed by 25% H2O2 (IOB) and 4. RI followed by 10% carbamide peroxide bleaching (HB). After a standardized demineralization protocol, RI and bleaching were performed according to the manufacturer's instructions prior to storage for 14 days. Brackets (Mini Diamond Twin, Ormco) were bonded buccally and lingually (Transbond XT, 3M). SBS values (MPa, traverse speed 0.5 mm/min, Zwick Roell) and the Adhesive Remnant Index (ARI) were determined on the buccal side. Following 5000 thermal cycles (5-55°C; RC 20 CS Lauda), SBS and ARI values for the lingual brackets were determined analogously. Data were analyzed with mixed ANOVA and Kruskal-Wallis and Wilcoxon tests at a 0.05 significance level.

Results: Differences in SBS were observed among groups (F(3, 64) = 8.01, P 0.001). HB exhibited the lowest SBS values (14.99 ± 6.42 MPa; 10.84 ± 3.61 MPa), differing significantly from the negative control (P = 0.041; P = 0.002 after thermocycling). No significant differences were noted between IOB and HB. Thermocycling reduced SBS values across all groups (F(3, 64) = 25.83, P 0.001).

Conclusion: RI followed by bleaching negatively impacts bracket bonding strength, with a significant reduction observed after home bleaching, while in-office bleaching showed no such effect.

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树脂浸润后牙齿美白对正畸托槽剪切粘结强度的影响。

目的：研究不同漂白方法对树脂渗透（Icon， DMG）牙釉质正畸托槽剪切结合强度（SBS）的影响。方法与材料：64颗拔除的智齿随机分为4组（n = 16）： 1；(1)对照（无处理）；（+）控制（RI）；其次是25% H2O2 （IOB）和4。再用10%过氧化脲漂白（HB）。在标准化脱矿方案后，根据制造商的说明在储存14天之前进行RI和漂白。托架（Mini Diamond Twin, Ormco）在颊部和舌部粘接（Transbond XT, 3M）。测定颊侧的SBS值（MPa，横移速度0.5 mm/min, Zwick Roell）和粘接残余指数（ARI）。经过5000个热循环（5-55°C; RC 20 CS Lauda），类似地确定了舌托槽的SBS和ARI值。数据分析采用混合方差分析和Kruskal-Wallis和Wilcoxon检验，显著性水平为0.05。结果：SBS组间差异有统计学意义（F(3,64) = 8.01, P < 0.001）。HB表现出最低的SBS值（14.99±6.42 MPa; 10.84±3.61 MPa），与阴性对照差异显著（P = 0.041；热循环后P = 0.002）。IOB和HB之间没有显著差异。热循环降低了所有组的SBS值（F(3,64) = 25.83, P 0.001）。结论：RI后漂白对托槽粘接强度有负面影响，家庭漂白后明显降低托槽粘接强度，而办公室漂白无此影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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The journal of adhesive dentistry

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