Ay Ezgi, Dursun Derya
Department of Orthodontics, The University of Health Sciences, Istanbul, Turkey.
PeerJ. 2025 Apr 29;13:e19335. doi: 10.7717/peerj.19335. eCollection 2025.
The aim of this study was to evaluate the effect of natural antioxidant activity obtained from () extract and fluoride-releasing sealant on the shear bond strength (SBS) of orthodontic brackets in teeth after bleaching with hydrogen peroxide (HP). In this research, 200 teeth were divided into two groups, the TT ( = 100) and the OT ( = 100). Each group was further divided into five subgroups ( = 20): TT1 and OT1 = no bleaching; TT2 and OT2 = bleaching; TT3 and OT3 = bleaching+two weeks delayed bonding; TT4 and OT4 = bleaching+10% sodium ascorbate (SA) TT5 and OT5 = bleaching+10% extract. The TT groups were bonded with Transbond sealent + Transbond XT (TT; 3M/Unitek), and the OT groups were bonded with Opal Seal primer (Reliance Orthodontic Products Itasca, IL, USA)+ Transbond XT. Samples were assessed by SBS testing and adhesive remnant index (ARI) scoring. Two-way ANOVA variance analysis, Tukey multiple comparison test and the Chi-square test were used for statistical evaluation. The highest SBS values were obtained in the TT1 (3.17 ± 1.1 MPa) and OT1 (12.58 ± 1.47 MPa) groups, and the lowest SBS values were obtained in the TT2 (4.40 ± 1.11 MPa) and OT2 groups (4.19 ± 1.02 MPa) ( = 0.0001). The mean value of SBS of TT5 was statistically significantly lower than the mean SBS value of TT3 and TT4 ( = 0.042, = 0.047). No statistically significant difference was observed in the ARI score distribution in the OT groups ( = 0.062), while a significant difference was noticed in the TT groups ( = 0.006). The results indicated that can be safely used to enhance SBS in bleached teeth, based on the dose, duration, and application procedure parameters utilized in this study. In addition, the fluoride-releasing sealant provides clinically sufficient SBS.
本研究的目的是评估从（）提取物中获得的天然抗氧化活性以及含氟封闭剂对用过氧化氢（HP）漂白后的牙齿上正畸托槽剪切粘结强度（SBS）的影响。在本研究中，200颗牙齿被分为两组，即TT组（n = 100）和OT组（n = 100）。每组进一步分为五个亚组（n = 20）：TT1和OT1 = 未漂白；TT2和OT2 = 漂白；TT3和OT3 = 漂白+两周延迟粘结；TT4和OT4 = 漂白+10%抗坏血酸钠（SA）；TT5和OT5 = 漂白+10%（）提取物。TT组用Transbond封闭剂+Transbond XT（TT；3M/Unitek）粘结，OT组用Opal Seal底漆（美国伊利诺伊州伊塔斯卡的Reliance正畸产品公司）+Transbond XT粘结。通过SBS测试和粘结剂残留指数（ARI）评分对样本进行评估。采用双向方差分析、Tukey多重比较检验和卡方检验进行统计评估。在TT1组（3.17±1.1 MPa）和OT1组（12.58±1.47 MPa）中获得了最高的SBS值，在TT2组（4.40±1.11 MPa）和OT2组（4.19±1.02 MPa）中获得了最低的SBS值（P = 0.0001）。TT5组的SBS平均值在统计学上显著低于TT3组和TT4组的SBS平均值（P = 0.042，P = 0.047）。在OT组的ARI评分分布中未观察到统计学显著差异（P = 0.062），而在TT组中观察到显著差异（P = 0.006）。结果表明，基于本研究中使用的剂量、持续时间和应用程序参数，（）可安全用于提高漂白牙齿的SBS。此外，含氟封闭剂提供了临床上足够的SBS。
