Kaya Yeşim, Değirmenci Beyza Ünalan, Değirmenci Alperen
Department of Orthodontics, Yüzüncü Yıl University School of Dentistry, Van, Turkey.
Department of Prosthodontics, Yüzüncü Yıl University School of Dentistry, Van, Turkey.
Turk J Orthod. 2019 Mar;32(1):28-33. doi: 10.5152/TurkJOrthod.2019.18034. Epub 2019 Mar 1.
The aim of the present study was to compare the shear bond strength (SBS) of metal orthodontic brackets bonded to long-term water-aged and fresh porcelain and composite surfaces.
One porcelain (Vitadur Alpha (VA)) and three composite (Filtek Ultimate (FU), Tetric EvoCeram (TEC), and Gradia Direct Anterior (GDA)) materials were evaluated in the present study. First, 10 discs from each material were prepared and subjected to the aging procedure for 5 years. Then, for comparison, another 10 discs from each material were prepared as fresh surfaces and stored in distilled water for 24 h. Metal brackets were bonded to the prepared disc surfaces, and after being stored in water for 24 h, they were subjected to shear bond test using a universal testing machine. Adhesive remnant index (ARI) scores were obtained by examining the disc surfaces under a stereomicroscope at 10× magnification. Kruskal-Wallis test was used to compare the aged and fresh groups.
Although the difference between the SBS between the aged and fresh groups with VA, FU, and TEC was not significant, the SBS was significantly higher in the fresh group with GDA. With regard to ARI scores, there was no significant difference between the aged and fresh groups with FU and GDA, whereas the ARI scores of the aged groups with VA and TEC were higher.
It was concluded that the aged restoration materials have a distinctive influence on the SBS of metal orthodontic brackets.
本研究旨在比较金属正畸托槽粘结到长期水老化及新鲜的瓷和复合材料表面的剪切粘结强度（SBS）。
本研究评估了一种瓷材料（维他灵α（VA））和三种复合材料（3MFiltek至尊（FU）、义获嘉瓷化树脂（TEC）和渐变前牙直接修复树脂（GDA））。首先，从每种材料制备10个圆盘，并进行5年的老化处理。然后，为作比较，从每种材料再制备10个圆盘作为新鲜表面，并在蒸馏水中储存24小时。将金属托槽粘结到制备好的圆盘表面，在水中储存24小时后，使用万能试验机对其进行剪切粘结测试。通过在10倍放大率的体视显微镜下检查圆盘表面获得粘结剂残留指数（ARI）评分。采用Kruskal-Wallis检验比较老化组和新鲜组。
虽然VA、FU和TEC的老化组与新鲜组之间的SBS差异不显著，但GDA新鲜组的SBS显著更高。关于ARI评分，FU和GDA的老化组与新鲜组之间无显著差异，而VA和TEC老化组的ARI评分更高。
得出结论，老化的修复材料对金属正畸托槽的SBS有显著影响。
