Ultimate micro-tensile strength of dental adhesives cured at different light source
Ultimate micro-tensile strength of dental adhesives cured at different light source
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DOI：
10.2494/photopolymer.21.31
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发表时间：
2008-01-01
影响因子：
0.8
通讯作者：
Hirai, Yoshito
中科院分区：
文献类型：
--
作者：
Kameyama, Atsushi;Kato, Junji;Hirai, Yoshito
本研究确定了三种不同光源固化的三种牙科粘合剂的极限微拉伸强度（mu UTS）;蓝光发光二极管（LED），紫光LED和石英钨卤素（QTH）。检查了三种牙科粘合剂，Clearfil SE Bond（SE）、Unifil Bond（UB）和D/E Resin（DE）。0.7制备2 mm厚的牙科粘合剂盘，修剪成沙漏形状，然后以1.0mm/min的十字头速度测量μ UTS（N=10）。此外，使用光谱仪测量每种光源的光谱和每种粘合剂的透射光谱。在SE中，QTH在不同光源中表现出最高的μ UTS，并且在蓝色LED和紫色LED之间没有发现显著差异。虽然QTH和蓝色LED之间的μ UTS没有显著差异，但紫色LED表明UB和DE中的μ UTS值显著较低。蓝色LED、紫色LED和QTH光源的光谱分析显示，峰分别在471 nm（范围：440-510 nm）、404 nm（390-430 nm）和492 nm（390-510 nm）处。在UB和DE两者中，在390-510膜的范围内透射率略微降低，与作为光引发剂包括的邻苯二酚所见的峰/范围相同。另一方面，在SE中，还观察到360-420 nm处的明显反向峰。结果表明，光引发剂的不同会影响胶粘剂的抗弯强度。
This study determined the ultimate micro-tensile strength (mu UTS) of three dental adhesives cured with three different light sources; blue light-emittmig diode (LED), violet LED, and quartz-tungsten-halogen (QTH). Three dental adhesives, Clearfil SE Bond (SE), Unifil Bond (UB), and D/E Resin (DE), were examined. 0.7 mm-thick dental adhesive discs were prepared, trimmed into an hourglass shape, and the mu UTS was then measured at a cross-head speed of 1.0 mm/min (N=10). Additionally, the spectrum of each light source and the transmission spectrum of each adhesive were measured using a spectrometer. In SE, QTH showed the highest mu UTS among the different light sources, and no significant difference was found between blue LED and violet LED. While no significant difference was found in mu UTS between QTH and blue LED,violet LED indicated significantly lower mu UTS value in both UB and DE. The spectrometric analysis of blue LED, violet LED and QTH light sources showed,peaks at 471 mn (range: 440-510 mn), 404 nm (390-430 nm), and 492 nm (390-510 nm), respectively. In both UB and DE, transmittance was slightly decreased at the range of 390-510 film, the same peak/range as seen for camphorquinone which is included as a photoinitiator. On the other hand, in SE, a significant reverse peak at 360-420 nm was additionally observed. It was concluded that light wavelength affects the mu UTS of adhesive due to the differences in the photoinitiator.