Lehmann Anna, Nijakowski Kacper, Drożdżyńska Agnieszka, Przybylak Martyna, Woś Patryk, Surdacka Anna
Department of Conservative Dentistry and Endodontics, Poznan University of Medical Sciences, 60-812 Poznan, Poland.
Department of Biotechnology and Food Microbiology, Poznan University of Life Sciences, 60-627 Poznan, Poland.
Materials (Basel). 2022 Dec 15;15(24):8976. doi: 10.3390/ma15248976.
The study focuses on the problem of lowering the pH around a composite filling concerning the polymerization modes and methacrylic acid release, which may affect not only the oral health but also the whole organism. A total of 90 specimens (30 of each: Filtek Bulk Fill, Evetric and Riva LC) were placed in 90 sterile hermetic polyethene containers with saline and incubated at 37 °C. Ten samples of each material were light-cured for 40 s with one of the three curing modes: full power mode (FPM), ramping mode (RM) and pulse mode (PM). The pH and methacrylic acid release evaluation were performed at the following time points: after 2 h and after 3, 7, 21 and 42 days from the specimen preparation. Regardless of light-curing mode, all used materials were characterized by a gradual elevation in methacrylic acid concentration. Only for Filtek Bulk Fill, increased methacrylic acid release was closely associated with lower pH. The choice of the polymerization mode has no significant influence on the methacrylic acid release. However, further research about composite light-curing is necessary to create the procedure algorithm, reducing the local and systemic complications associated with composite fillings.
该研究聚焦于复合填充物周围pH值降低的问题，涉及聚合模式和甲基丙烯酸释放，这不仅可能影响口腔健康，还可能影响整个机体。总共90个样本（每种各30个：Filtek Bulk Fill、Evetric和Riva LC）被置于90个装有生理盐水的无菌密封聚乙烯容器中，并在37℃下孵育。每种材料的10个样本采用三种固化模式之一进行40秒的光固化：全功率模式（FPM）、斜坡模式（RM）和脉冲模式（PM）。在以下时间点进行pH值和甲基丙烯酸释放评估：样本制备后2小时以及3、7、21和42天。无论光固化模式如何，所有使用的材料均表现出甲基丙烯酸浓度逐渐升高的特征。仅对于Filtek Bulk Fill，甲基丙烯酸释放增加与较低的pH值密切相关。聚合模式的选择对甲基丙烯酸释放没有显著影响。然而，有必要对复合光固化进行进一步研究，以创建程序算法，减少与复合填充物相关的局部和全身并发症。
