Ankara University, Faculty of Dentistry, Department of Restorative Dentistry.
Ankara Yildirim Beyazit University, Faculty of Dentisty, Department of Pediatrics Dentistry.
Dent Mater J. 2021 Mar 31;40(2):525-531. doi: 10.4012/dmj.2020-071. Epub 2020 Dec 2.
The aim of this study was to compare the effects of conventional, sonic or pre-heating insertion techniques on internal void formation of bulk-fill composites with micro-computed tomography. Standardized cylindrical cavities were prepared in 160 human third molars. Four groups received different paste-like bulk-fill composites: SonicFill 2 (SF2); VisCalor Bulk (VCB); Filtek One Bulk-fill restorative (FBF); Tetric EvoCeram Bulk Fill (TEB); and a conventional posterior composite, Clearfil Majesty Posterior (CMP). A hybrid CAD/CAM block was selected as a control (n=10). Composite restorations were built according to each resin composite type and insertion technique (n=10). Micro-CT was used to assess internal void rates. Data was analyzed with two-way ANOVA and Tukey's multiple comparisons test (α=0.05). CAD/CAM blocks were free of voids. For each composite, the highest void rates were observed for the sonic delivery method (p<0.05) except for SF2. SF2 was not affected by insertion techniques (p>0.05). Other composites showed the lowest void rates with pre-heating technique.
本研究旨在通过微计算机断层扫描比较传统、超声或预热插补技术对块状充填复合材料内部空隙形成的影响。在 160 颗人第三磨牙中制备标准化的圆柱形腔。四组分别接受不同的糊状块状充填复合材料：SonicFill 2（SF2）；VisCalor Bulk（VCB）；Filtek One Bulk-fill 修复体（FBF）；Tetric EvoCeram Bulk Fill（TEB）；以及传统的后牙复合树脂，Clearfil Majesty Posterior（CMP）。混合 CAD/CAM 块被选为对照（n=10）。根据每种树脂复合材料类型和插补技术（n=10）构建复合修复体。使用微计算机断层扫描评估内部空隙率。采用双因素方差分析和 Tukey 多重比较检验（α=0.05）进行数据分析。CAD/CAM 块无空隙。对于每种复合材料，除了 SF2 之外，超声输送方法的空隙率最高（p<0.05）。SF2 不受插补技术的影响（p>0.05）。其他复合材料采用预热技术时，空隙率最低。
