Terada Raquel Sano Suga, Fronza Bruna Marin, Faraoni Juliana Jendiroba, Hoshino Lidiane Vizioli de Castro, Sato Francielle, Palma-Dibb Regina Guenka, Scheffel Debora Lopes Salles, Giannini Marcelo
Universidade Estadual de Maringá - UEM, Department of Dentistry, Maringá, PR, Brazil.
Universidade de São Paulo - USP, School of Dentistry, Department of Biomaterials and Oral Biology, São Paulo, SP, Brazil.
Braz Oral Res. 2024 Dec 20;38:e128. doi: 10.1590/1807-3107bor-2024.vol38.0128. eCollection 2024.
The aim of this study was to assess roughness profile and surface roughness after simulated toothbrushing cycles, as well as the degree of conversion (DC) of bulk-fill resin composites at different depths. Forty nine composite discs were made from three low-viscosity bulk-fill resins (Filtek Bulk-Fill Flowable/3M Oral Care - FBF, Beautifil-Bulk Flowable/Shofu Inc. - BBF and Surefill SDR Flow/Dentsply Caulk - SDR), three high-viscosity bulk-fill resin composites (Filtek Bulk-Fill Restorative/3M Oral Care - FBR, Beautifil-Bulk Restorative/Shofu Inc. - BBR and Tetric EvoCeram Bulk Fill/Ivoclar Vivadent - TEB) and one conventional composite (Filtek Supreme Ultra/3M Oral Care - FSU) (n=7), using addition silicon molds (2 mm thick x 10 mm diameter). The roughness profile (Rv) and surface roughness (Sa) were analyzed after 30,000 brushing cycles using confocal laser scanning microscopy. Five samples (4 mm thick x 2 mm diameter) were produced per resin composite and light-cured for 20 seconds using a LED-curing unit. After 24 hours at 37oC, DC of samples was evaluated at four depths, using a confocal Raman microscope. The data were analyzed by ANOVA and Tukey post hoc multiple-comparison tests (α = 0.05). The Rv values of FSU were lower than those obtained for BBR and BBF. The toothbrushing significantly decreased the Sa for all composites. The DC was significantly reduced at 4 mm depth. Toothbrushing changed composite surface of all materials, especially for BBR and BBF. Composites were not able to maintain the DC values shown at the top compared with those at the bottom (4 mm depth).
本研究的目的是评估模拟刷牙循环后的粗糙度轮廓和表面粗糙度，以及不同深度的大块充填树脂复合材料的转化率（DC）。用三种低粘度大块充填树脂（Filtek Bulk-Fill Flowable/3M口腔护理产品 - FBF、Beautifil-Bulk Flowable/松风株式会社 - BBF和Surefill SDR Flow/登士柏卡沃 - SDR）、三种高粘度大块充填树脂复合材料（Filtek Bulk-Fill Restorative/3M口腔护理产品 - FBR、Beautifil-Bulk Restorative/松风株式会社 - BBR和Tetric EvoCeram Bulk Fill/义获嘉伟瓦登特 - TEB）以及一种传统复合材料（Filtek Supreme Ultra/3M口腔护理产品 - FSU）（n = 7）制作了49个复合树脂圆盘，使用加成型硅模具（2毫米厚×10毫米直径）。使用共聚焦激光扫描显微镜在30000次刷牙循环后分析粗糙度轮廓（Rv）和表面粗糙度（Sa）值。每种树脂复合材料制作5个样本（4毫米厚×2毫米直径），并使用LED固化单元光固化20秒。在37℃下放置24小时后，使用共聚焦拉曼显微镜在四个深度评估样本的转化率。数据通过方差分析和Tukey事后多重比较检验进行分析（α = 0.05）。FSU的Rv值低于BBR和BBF的Rv值获得值。刷牙显著降低了所有复合材料的Sa值。在4毫米深度处转化率显著降低。刷牙改变了所有材料的复合树脂表面，尤其是BBR和BBF。与底部（4毫米深度）相比，复合材料无法维持顶部显示的转化率值。
