Sá Vanessa Alves de, Bittencourt Hélio Radke, Burnett Júnior Luiz Henrique, Spohr Ana Maria
Department of Restorative Dentistry, School of Dentistry, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre 90619-900, Brazil.
Department of Statistics, Polytechnic School, Pontifical Catholic University of Rio Grande do Sul, Porto Alegre 90690-900, Brazil.
Materials (Basel). 2025 Jan 13;18(2):327. doi: 10.3390/ma18020327.
The aim of this study was to evaluate, in vitro, the void formation and marginal adaptation in Class II cavities restored with preheated and injected bulk-fill resin composites. Eighty third molars received Class II cavities on their mesial and distal surfaces and were randomly distributed into eight groups (n = 10) according to material (Filtek Universal-control, incremental technique; Filtek One Bulk-Fill; Admira Fusion X-tra Bulk-Fill; VisCalor Bulk-Fill) and the temperature of the material (24 °C or 68 °C). The restored teeth were scanned using a SkyScan 1173 microtomograph. The percentage of internal voids (%IV) was analyzed using CTan software (version 1.23.02) and the percentages of continuous margins (%CM) in enamel and dentin were analyzed using Dataviewer software (version 1.5.6.2). The data of %IV and %CM were subjected to two-way ANOVA on ranks, followed by Tukey's test (α = 0.05). At 24 °C, Filtek Universal had a greater %IV (1.89%) ( < 0.05), which did not differ significantly from that of Admira Fusion X-tra Bulk-Fill (0.29%) ( > 0.05). Filtek One Bulk-Fill (0.07%) and VisCalor Bulk-Fill (0.07%) had lower %IV ( < 0.05). Preheating resulted in a significantly lower %IV for Admira Fusion X-tra Bulk-Fill ( < 0.05). Temperature did not significantly influence marginal adaptation ( > 0.05). VisCalor Bulk-Fill achieved significantly higher %CM in dentin (98%) at 24 °C ( < 0.05). It was concluded that bulk-fill-injected resin composites tend to have fewer internal voids than conventional resin composites using the incremental technique, and the injection of the resin composite into the cavity seems to be more important for marginal adaptation than the preheating procedure.
本研究的目的是在体外评估用预热和注射型大块充填树脂复合材料修复的Ⅱ类洞的空洞形成情况和边缘适应性。80颗第三磨牙在其近中面和远中面制备Ⅱ类洞，并根据材料（Filtek Universal对照，分层技术；Filtek One Bulk-Fill；Admira Fusion X-tra Bulk-Fill；VisCalor Bulk-Fill）和材料温度（24℃或68℃）随机分为八组（n = 10）。使用SkyScan 1173微型计算机断层扫描仪对修复后的牙齿进行扫描。使用CTan软件（版本1.23.02）分析内部空洞百分比（%IV），使用Dataviewer软件（版本1.5.6.2）分析釉质和牙本质中连续边缘百分比（%CM）。对%IV和%CM数据进行双向秩方差分析，随后进行Tukey检验（α = 0.05）。在24℃时，Filtek Universal的%IV更高（1.89%）（P < 0.05），与Admira Fusion X-tra Bulk-Fill（0.29%）相比无显著差异（P > 0.05）。Filtek One Bulk-Fill（0.07%）和VisCalor Bulk-Fill（0.07%）的%IV较低（P < 0.05）。预热使Admira Fusion X-tra Bulk-Fill的%IV显著降低（P < 0.05）。温度对边缘适应性无显著影响（P > 0.05）。VisCalor Bulk-Fill在24℃时牙本质中的%CM显著更高（98%）（P < 0.05）。得出的结论是，与使用分层技术的传统树脂复合材料相比，注射型大块充填树脂复合材料往往内部空洞更少，并且将树脂复合材料注入窝洞对边缘适应性似乎比预热程序更重要。
