Ebrahimi-Chaharom Mohammad-Esmaeel, Safyari Leila, Safarvand Hossein, Jafari-Navimipour Elmira, Alizadeh-Oskoee Parnian, Ajami Amir-Ahmad, Abed-Kahnamouei Mahdi, Bahari Mahmoud
Associate Professor, Department of Operative Dentistry, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.
Dental and Periodontal Research Center, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran.
J Clin Exp Dent. 2020 Sep 1;12(9):e813-e820. doi: 10.4317/jced.56989. eCollection 2020 Sep.
The present study was aimed to evaluate the effect of pre-heating of bulk -fill resin composites on monomer elution from them.
Three different types of resin composites were used including Tetric N-Ceram Bulk Fill, X-tra Fill and X-tra Base. 10 cylindrical samples were prepared from each resin composites. Before light curing, 5 samples were pre-heated until reaching 68˚C, then 5 other samples were polymerized at room temperature. After 24 hours, release of UDMA, TEGDMA and BIS-GMA monomers were measured by High-Performance Liquid Chromatography analysis. Data analysis was performed by two-way ANOVA test, Games-Howell and Sidak post hoc tests.
Pre-heating did not have any statistically significant effect on the mean values of UDMA, TEGDMA and Bis-GMA elution (>0.05). The greatest amount of released Bis-GMA and UDMA was obtained from Tetric N-Ceram Bulk-fill composite. The greatest amount of released TEGDMA was obtained from X-tra Fill composite. X-tra Base composite showed the lowest amount of monomer release (<0.001).
Pre-heating did not have any effect on monomer release from bulk-fill resin composites. Moreover, the amount and the type of monomers released from various bulk-fill resin composites were not similar. Bulk fill composite resin, elution, HPLC, residual monomer, temperature.
本研究旨在评估大块充填树脂复合材料预热对其单体洗脱的影响。
使用了三种不同类型的树脂复合材料，包括Tetric N-Ceram Bulk Fill、X-tra Fill和X-tra Base。每种树脂复合材料制备10个圆柱形样本。在光固化前，将5个样本预热至68˚C，另外5个样本在室温下聚合。24小时后，通过高效液相色谱分析测量UDMA、TEGDMA和BIS-GMA单体的释放量。数据分析采用双向方差分析、Games-Howell和Sidak事后检验。
预热对UDMA、TEGDMA和Bis-GMA洗脱的平均值没有任何统计学上的显著影响（>0.05）。从Tetric N-Ceram Bulk-fill复合材料中获得的释放的Bis-GMA和UDMA量最大。从X-tra Fill复合材料中获得的释放的TEGDMA量最大。X-tra Base复合材料显示出最低的单体释放量（<0.001）。
预热对大块充填树脂复合材料的单体释放没有任何影响。此外，从各种大块充填树脂复合材料中释放的单体的量和类型并不相似。大块充填复合树脂、洗脱、高效液相色谱、残留单体、温度。
