Cerone Melissa, El-Badrawy Wafa, Gong Siew-Ging, Prakki Anuradha
J Can Dent Assoc. 2019 Aug;85:j6.
The objective of this study was to assess the shear bond strength (SBS) of orthodontic brackets bonded to uncut enamel with universal self-etch 1-step adhesive systems.
Extracted uncut premolars (n = 160) were randomly divided into 4 groups for treatment with Scotchbond Universal Adhesive (SU), All-Bond Universal (BU), Clearfil Universal Bond (CU) or the control, Adper Scotchbond Multi-Purpose Adhesive. Following bonding of brackets on tooth surfaces, teeth were stored in distilled water for 24 h and 6 months, and brackets were tested for SBS. The adhesive remnant index (ARI) and quantitative percentage of remaining resin (%RR) were recorded. Scanning electron microscopy was used to analyze debonded surfaces qualitatively. SBS and %RR data were analyzed by 2-way ANOVA followed by the Tukey test (α = 0.05).
At neither time did these universal adhesives achieve satisfactory SBS for orthodontic treatment. The control group had the highest SBS, ARI score and mean %RR (and these differences were significant), while the BU group had the lowest SBS. SBS mean values and ARI scores decreased over time for SU and BU, but remained stable for CU. There was no difference in %RR among the universal adhesives tested.
None of the universal adhesives used in self-etch mode achieved SBS values (at 24 h and 6 months) that were satisfactory for orthodontic treatment.
本研究的目的是评估使用通用自酸蚀一步法粘结系统将正畸托槽粘结到未切割牙釉质上的剪切粘结强度（SBS）。
将拔除的未切割前磨牙（n = 160）随机分为4组，分别用3M Scotchbond通用粘结剂（SU）、全效通用粘结剂（BU）、可乐丽通用粘结剂（CU）进行处理，或作为对照使用3M Adper Scotchbond多功能粘结剂。在牙齿表面粘结托槽后，将牙齿在蒸馏水中保存24小时和6个月，然后测试托槽的SBS。记录粘结剂残留指数（ARI）和剩余树脂的定量百分比（%RR）。使用扫描电子显微镜对脱粘表面进行定性分析。SBS和%RR数据采用双向方差分析，然后进行Tukey检验（α = 0.05）。
在这两个时间点，这些通用粘结剂均未获得令人满意的正畸治疗SBS。对照组的SBS、ARI评分和平均%RR最高（且这些差异具有统计学意义），而BU组的SBS最低。SU和BU组的SBS平均值和ARI评分随时间下降，但CU组保持稳定。所测试的通用粘结剂之间的%RR没有差异。
在自酸蚀模式下使用的通用粘结剂均未获得（在24小时和6个月时）令人满意的正畸治疗SBS值。
