Private Clinic, Manisa, Turkey.
Pamukkale University, Faculty of Dentistry, Department of Orthodontics, 20160 Denizli, Turkey.
Int Orthod. 2020 Jun;18(2):366-373. doi: 10.1016/j.ortho.2020.01.010. Epub 2020 Feb 25.
To evaluate the effects of one-step orthodontic composite combined with primer on microleakage and shear bond strength (SBS) of metal and ceramic brackets.
This in vitro study included 144 extracted premolar teeth. Teeth were divided into two main groups according to the bracket type (metal and ceramic). In each group, brackets were bonded with three different bonding systems: two-step total-etch (37% phosphoric acid+Transbond XT primer+Transbond XT light cure adhesive), one-step self-etch (Transbond Plus self-etch primer+Transbond XT light cure adhesive), and one-step orthodontic adhesive (37% phosphoric acid+GC Ortho Connect light cure adhesive). A total of 6 groups (n=12) were performed for each evaluation. All samples were subjected to thermal cycling. After dye penetration, sections were prepared and assessed under stereomicroscope. After SBS test, adhesive remnant index (ARI) scores were determined. Data were analyzed statistically.
There were no significant differences between total-etch and one-step orthodontic adhesive for microleakage. Self-etch adhesive showed more microleakage at occlusal interfaces (P<0.05). The highest and lowest mean SBS values were found in ceramic brackets bonded with total- and self-etch adhesives, respectively. No significant differences were found among the SBS values of the groups. However, the differences between ARI scores were found statistically significant (P<0.05).
Orthodontic composite integrated with primer can be used safely instead of two-step total-etch adhesives during the bonding of metal and ceramic brackets due to less microleakage and adequate SBS values.
评价一步法正畸复合树脂联合底涂剂对金属和陶瓷托槽微渗漏和剪切粘结强度（SBS）的影响。
本体外研究纳入 144 颗恒牙。根据托槽类型（金属和陶瓷）将牙齿分为两组。每组中，使用三种不同的粘结系统粘结托槽：两步法全酸蚀（37%磷酸+Transbond XT 底涂剂+Transbond XT 光固化粘结剂）、一步法自酸蚀（Transbond Plus 自酸蚀底涂剂+Transbond XT 光固化粘结剂）和一步法正畸粘结剂（37%磷酸+GC Ortho Connect 光固化粘结剂）。每组（n=12）进行 6 项评估。所有样本均进行热循环。染色渗透后，制备切片并在体视显微镜下进行评估。SBS 测试后，确定粘结残留指数（ARI）评分。对数据进行统计学分析。
全酸蚀和一步法正畸粘结剂的微渗漏无显著差异。自酸蚀粘结剂在牙合面有更多的微渗漏（P<0.05）。陶瓷托槽的最高和最低平均 SBS 值分别出现在全酸蚀和自酸蚀粘结剂组。各组 SBS 值无显著差异。然而，ARI 评分之间的差异具有统计学意义（P<0.05）。
在粘结金属和陶瓷托槽时，正畸复合树脂联合底涂剂可安全替代两步法全酸蚀粘结剂，因其微渗漏较少且 SBS 值足够。
