Department of Restorative Dentistry, Sutcu Imam University.
Department of Restorative Dentistry, Recep Tayyip Erdogan University.
Dent Mater J. 2019 Dec 1;38(6):1019-1025. doi: 10.4012/dmj.2018-377. Epub 2019 Oct 2.
The goal of this study was to examine the effect of thermal cycling on the amount of monomer released from bulk fill composites. Five bulk fill composite resins were used in the study. Extraction solutions were obtained at the end of the time/thermal cycle periods: 0-1 day/0-1,500, 1-3 days/1,500-4,500 and 3-7 days/4,500-10,000. The monomers in the extractions samples taken at each time point were measured on an HPLC instrument. The obtained data were analyzed by repeated measures of variance analysis and tukey multiple comparison tests (p<0.05). The thermocycling increased the amount of monomer released from all composites at 0-1 day (p<0.05). At 0-1 and 1-3 days, Venus Bulk Fill and Filtek Bulk Fill composite resins were more affected. Polymer networks with high molecular weight monomers such as Bis-GMA and UDMA can be less affected by thermal changes compared to polymers with low molecular weight monomers.
本研究旨在考察热循环对块状填充复合材料中单体释放量的影响。研究中使用了五种块状填充复合树脂。在时间/热循环周期结束时获得提取溶液：0-1 天/0-1500 次，1-3 天/1500-4500 次和 3-7 天/4500-10000 次。在每个时间点采集的提取样品中的单体在 HPLC 仪器上进行测量。通过重复测量方差分析和 tukey 多重比较检验（p<0.05）对获得的数据进行分析。热循环会增加所有复合材料在 0-1 天内释放的单体量（p<0.05）。在 0-1 天和 1-3 天，金星块状填充和 Filtek 块状填充复合树脂受到的影响更大。与低分子量单体的聚合物相比，具有高分子量单体（如 Bis-GMA 和 UDMA）的聚合物网络受热变化的影响可能较小。
