Koç-Vural Uzay, Kerimova Leyla, Baltacioglu İsmail H, Kiremitçi Arlin
Postdoc Researcher, Hacettepe University, Department of Restorative Dentistry.
Research Assistant, Hacettepe University, Department of Restorative Dentistry.
J Clin Exp Dent. 2017 Mar 1;9(3):e437-e442. doi: 10.4317/jced.53501. eCollection 2017 Mar.
The aim of this study was to analyze the bond strength of aged resin based nanocomposites repaired with the same and bulk fill composites.
Seventy-two disc shaped resin composites consisted of three different nanocomposite resins (Filtek Ultimate/FU, Herculite XRV Ultra/HXRV, and Reflectys/R) were produced. After storing the samples for 8 weeks in distilled water, each material was combined with the same material or the bulk-fill composite resin system (Filtek Ultimate+Filtek Ultimate/Group-1; Filtek Ultimate+Tetric BF/Group-2; Herculite XRV+Herculite XRV/Group-3; Herculite XRV+Tetric BF/ Group-4; Reflectys+Reflectys/Group 5; Reflectys+Tetric BF/Group-6), for repair. Then specimens were subjected to shear bond strength testing(SBS), and the debonded surfaces were examined.
There was a significant difference among three materials(repaired with itself+bulk fill) for SBS testing values (=0.001). FU and R were found to be similar, while HXRV was significantly different from them. A significant difference between group-1 and 2 (=0.006) was detected, while there were no differences between group 3 and 4 (= 0.142), and 5 and 6 (=0.346). Among the six groups, repair SBS testing values with TBF were higher than repair with itself except for FU.
The bulk-fill repaired materials showed higher bond strength except for FU, which showed the highest SBS value when repaired with itself. An increased incidence of adhesive fracture was observed at low strengths. Resin-based composites, nanofillers, surface treatment, macro-shear, repair.
本研究旨在分析用相同材料和大块充填复合材料修复的老化树脂基纳米复合材料的粘结强度。
制备了72个圆盘形树脂复合材料，由三种不同的纳米复合树脂（Filtek Ultimate/FU、Herculite XRV Ultra/HXRV和Reflectys/R）组成。将样品在蒸馏水中储存8周后，每种材料与相同材料或大块充填复合树脂系统（Filtek Ultimate+Filtek Ultimate/第1组；Filtek Ultimate+Tetric BF/第2组；Herculite XRV+Herculite XRV/第3组；Herculite XRV+Tetric BF/第4组；Reflectys+Reflectys/第5组；Reflectys+Tetric BF/第6组）进行修复。然后对试样进行剪切粘结强度测试（SBS），并检查脱粘表面。
三种材料（自身修复+大块充填）的SBS测试值之间存在显著差异（=0.001）。发现FU和R相似，而HXRV与它们有显著差异。检测到第1组和第2组之间存在显著差异（=0.006），而第3组和第4组（=0.142）以及第5组和第6组（=0.346）之间没有差异。在六组中，除FU外，用TBF修复的SBS测试值高于自身修复。
除FU外，大块充填修复材料显示出更高的粘结强度，FU自身修复时SBS值最高。在低强度下观察到粘结断裂的发生率增加。树脂基复合材料、纳米填料、表面处理、宏观剪切、修复。
