Development of aesthetic light-activated restorative resin using a new photoinitiation system

使用新型光引发系统开发美观的光活化修复树脂

基本信息

批准号：
19592208
负责人：
ARIKAWA Hiroyuki
金额：
$ 2.25万
依托单位：
Kagoshima University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2007
资助国家：
日本
起止时间：
2007 至 2009
项目状态：
已结题

项目摘要

Visible light-activated composite resins has been widely used in dentistry as direct filling restorative materials because of their easy handling, aesthetics, and improved physical and mechanical properties. Considering the adverse biological effects of UV light, the use of camphorquinone (CQ) as a photoinitiator for the visible light-activated resin has been accepted in dentistry, because it absorbs wavelengths in the harmless visible blue-light region. However, CQ has some drawbacks such as low polymerization efficiency and its solid yellow, which would result in low mechanical properties of the resin, and lead to undesirable yellowing of the final polymerized resin. This places practical limits on the acceptable concentration of CQ in the resin. To overcome the drawbacks of CQ, some alternative visible light photoinitiators have been introduced for dental light-activated resins as the photoinitiators, which have desirable benefits such as a lower yellowing effect and higher polymerization efficiency compared with CQ. This study investigated the efficacy of alternative various new photoinitiators, such as phenylpropadione, monoacylphosphine oxide, and bisacylphosphine oxide, which would replace CQ without diminishing the properties of resin. In addition, the color effects of the alternative photoinitiators on the light-activated resin were compared to that of CQ. Our results indicate that the monoacylphosphine oxide photoinitiator provided a useful and improved photopolymerization system for dental light-activated resins, and also showed less of a color change during and after polymerization in comparison with CQ and other photoinitiators.

可见光激活复合树脂由于其易于操作、美观且物理机械性能得到改善，已作为直接填充修复材料广泛应用于牙科领域。考虑到紫外线的不良生物效应，使用樟脑醌（CQ）作为可见光活化树脂的光引发剂已在牙科中被接受，因为它吸收无害的可见蓝光区域的波长。然而，CQ存在一些缺点，例如聚合效率低、呈固体黄色，这会导致树脂的机械性能较低，并导致最终聚合树脂出现不希望的黄变。这对树脂中可接受的 CQ 浓度产生了实际限制。为了克服CQ的缺点，一些替代的可见光光引发剂被引入牙科光活化树脂作为光引发剂，与CQ相比，它们具有较低的黄变效应和更高的聚合效率等优点。本研究研究了各种新型光引发剂的功效，例如苯基丙二酮、单酰基氧化膦和双酰基氧化膦，它们将取代 CQ，而不降低树脂的性能。此外，还将替代光引发剂对光活化树脂的颜色效果与 CQ 进行了比较。我们的结果表明，单酰基氧化膦光引发剂为牙科光活化树脂提供了一种有用且改进的光聚合体系，并且与 CQ 和其他光引发剂相比，聚合期间和聚合后的颜色变化较小。