Topa-Skwarczyńska Monika, Jankowska Magdalena, Gruchała-Hałat Alicja, Petko Filip, Galek Mariusz, Ortyl Joanna
Department of Biotechnology and Physical Chemistry, Faculty of Chemical Engineering and Technology, Cracow University of Technology, Warszawska 24, 30-155 Cracow, Poland; Photo4Chem Ltd., Lea 114, 30-133 Cracow, Poland.
Department of Biotechnology and Physical Chemistry, Faculty of Chemical Engineering and Technology, Cracow University of Technology, Warszawska 24, 30-155 Cracow, Poland.
Dent Mater. 2023 Aug;39(8):729. doi: 10.1016/j.dental.2023.06.003. Epub 2023 Jun 30.
To obtain new generation dental composites with improved performance properties compared to currently available dental fillings on the market and to determine the influence of new initiating systems on final product parameters such as degree of cure, hardness, color, and shrinkage.
In order to verify the effectiveness of the developed initiating systems, typical spectroscopic, electrochemical, and kinetic studies using the real-time FT-IR method were shown. Moreover, paste dental fillings were prepared, the compositions were irradiated with the dental lamp, and the degrees of cross-linking were measured by Raman spectroscopy. The polymerization shrinkage was also determined using the rheometer. In addition, their hardness was examined on the Shore scale. Finally, the color analysis of the composites in the Lab* color space was compared with the VITA CLASSIC colorant.
It was shown that, due to their excellent spectroscopic and electrochemical properties, new quinazolin-2-one can act as co-initiators in cationic and radical photopolymerization. It was demonstrated that the most effective composite containing the initiator system in the form of 3-SCHPh-Q, IOD, MDEA, and an inorganic filler as nanometric silica and a bonding agent is cured more than 90% after just 1 cycle of dental lamp exposure (30 s), the hardness of the composite after curing on the Shor Scale is 82 ± 4, and the polymerization shrinkage is less than 2.8%.
The article demonstrates effective new initiator systems as an alternative to CQ/amine for obtaining new-generation dental composites. The developed dental composites are a big competition to the currently used dental fillings on the market.
获得与市场上现有牙科填充物相比性能有所改进的新一代牙科复合材料，并确定新型引发体系对最终产品参数（如固化程度、硬度、颜色和收缩率）的影响。
为了验证所开发引发体系的有效性，展示了使用实时傅里叶变换红外光谱法进行的典型光谱、电化学和动力学研究。此外，制备了膏状牙科填充物，用牙科灯对组合物进行辐照，并通过拉曼光谱法测量交联度。还使用流变仪测定了聚合收缩率。此外，在肖氏硬度计上检测了它们的硬度。最后，将复合材料在Lab*颜色空间中的颜色分析结果与VITA CLASSIC色料进行了比较。
结果表明，由于其优异的光谱和电化学性质，新型喹唑啉-2-酮可作为阳离子和自由基光聚合中的共引发剂。结果表明，含有3-SCHPh-Q、碘化物、N,N-二甲基乙醇胺形式的引发体系以及作为纳米二氧化硅的无机填料和粘合剂的最有效复合材料，在牙科灯照射1个周期（30秒）后固化率超过90%，固化后复合材料的肖氏硬度为82±4，聚合收缩率小于2.8%。
本文展示了有效的新型引发体系，可作为樟脑醌/胺的替代品用于获得新一代牙科复合材料。所开发的牙科复合材料对市场上目前使用的牙科填充物构成了巨大竞争。
