Preparation and Properties of Dental Composite Resin Cured under Near Infrared Irradiation
Preparation and Properties of Dental Composite Resin Cured under Near Infrared Irradiation
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DOI：
10.2494/photopolymer.22.551
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发表时间：
2009-01-01
影响因子：
0.8
通讯作者：
Kogo, Yasuo
中科院分区：
文献类型：
--
作者：
Uo, Motohiro;Kudo, Eiki;Kogo, Yasuo
光聚合复合树脂（CR）是一种广泛应用于牙科充填材料的树脂。由于照射的蓝色可见（维斯）光的散射，电流CR对光聚合深度具有限制。已知稀土掺杂的Y2O3颗粒（Y2O3：RE）在近红外（NIR）激发下通过上转换过程发射蓝色维斯光。这些颗粒可以通过在近红外光的照射下发射蓝色维斯光来充当增强树脂的填充剂和固化树脂的照明剂，由于近红外光的波长较长，因此传播得更深。本研究制备了Y_2O_3：RE的CR。添加Y_2O_3的CR的杨氏模量与商品CR相当，但硬度低于商品CR。用近红外辐射成功地固化了Y_2O_3：RE的CR。提出了利用Y2O3：RE的上转换发光作为CR近红外聚合引发剂的可行性。
A composite resin (CR) with photo-polymerization is widely used for dental filling material. Current CR has a restriction on the photo-polymerization depth because of the scattering of irradiated blue visible (VIS) light. Rare earth doped Y2O3 particles (Y2O3:RE) are known to emit blue VIS light under near infrared (NIR) excitation by an upconversion process. The particles can act as both filler to reinforce and illuminator to cure the resin by emitting blue VIS light under the irradiation of the NIR light, which propagates more deeply due to its longer wavelength. In this study, CR with Y2O3:RE was prepared. The Young's modulus of CR with Y2O3 was comparable with that of commercial CR, however, the hardness was lower than that of commercial CR. CR with Y2O3:RE was successfully cured with NIR irradiation. Then, the feasibility of Y2O3:RE as the NIR polymerization initiator using its upconversion emission for CR was suggested.