Department of Prosthodontics, Faculty of Dentistry, Gazi University, Ankara, Turkey.
J Adv Prosthodont. 2012 May;4(2):93-6. doi: 10.4047/jap.2012.4.2.93. Epub 2012 May 30.
The objective of this study was to compare the light transmittance of zirconia in different thicknesses using various light curing units.
A total of 21 disc-shaped zirconia specimens (5 mm in diameter) in different thicknesses (0.3, 0.5 and 0.8 mm) were prepared. The light transmittance of the specimens under three different light-curing units (quartz tungsten halogen, light-emitting diodes and plasma arc) was compared by using a hand-held radiometer. Statistical significance was determined using two-way ANOVA (α=.05).
ANOVA revealed that thickness of zirconia and light curing unit had significant effects on light transmittance (P<.001).
Greater thickness of zirconia results in lower light transmittance. Light-emitting diodes light-curing units might be considered as effective as Plasma arc light-curing units or more effective than Quartz-tungsten-halogen light-curing units for polymerization of the resin-based materials.
本研究旨在比较不同厚度的氧化锆的透光率，使用不同的光固化设备。
共制备了 21 个不同厚度（0.3、0.5 和 0.8 毫米）的圆盘状氧化锆样本（直径 5 毫米）。使用手持辐射计比较了三种不同光固化设备（石英钨卤素、发光二极管和等离子弧）下样本的透光率。使用双向方差分析（α=.05）确定统计学意义。
方差分析显示，氧化锆的厚度和光固化设备对透光率有显著影响（P<.001）。
氧化锆的厚度越大，透光率越低。发光二极管光固化设备对于聚合树脂基材料而言，其效果可能与等离子弧光固化设备相当，或者比石英钨卤素光固化设备更有效。
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