Hasslen Jennifer A, Barkmeier Wayne W, Shaddy Raymond S, Little Jared R
Department of General Dentistry, Creighton University School of Dentistry.
J Oral Sci. 2019 Aug 28;61(3):425-430. doi: 10.2334/josnusd.18-0245. Epub 2019 Jul 24.
The purpose of this study was to determine the depth of cure (DOC) of three resin-based composites (RBCs) using varying irradiance exposures with a corded light-emitting diode curing unit. DOCs for Filtek Z250, TPH Spectra, and Tetric EvoCeram Bulk Fill were determined using the International Organization for Standardization (ISO) Standard 4049. The RBCs were light-polymerized using three different power modes and manufacturer-recommended curing times. Irradiance was determined using a spectrometer sensor and the total energy density was calculated for each power mode and concomitant polymerization time. The DOC data were analyzed with a two-way analysis of variance and Tukey's post hoc test. Tetric EvoCeram Bulk Fill produced significantly greater DOCs than TPH and Z250 (P < 0.05) for all three power mode settings. Overall, the DOC of Tetric EvoCeram Bulk Fill was greater than those of TPH and Z250 at all power settings, but the individual RBCs did not show a significant DOC difference among the three power settings (P > 0.05).
本研究的目的是使用带线发光二极管固化装置，通过改变辐照暴露量来测定三种树脂基复合材料（RBC）的固化深度（DOC）。Filtek Z250、TPH Spectra和Tetric EvoCeram Bulk Fill的DOC是根据国际标准化组织（ISO）标准4049测定的。使用三种不同的功率模式和制造商推荐的固化时间对RBC进行光聚合。使用光谱仪传感器测定辐照度，并计算每种功率模式和相应聚合时间的总能量密度。DOC数据采用双向方差分析和Tukey事后检验进行分析。在所有三种功率模式设置下，Tetric EvoCeram Bulk Fill产生的DOC均显著大于TPH和Z250（P < 0.05）。总体而言，在所有功率设置下，Tetric EvoCeram Bulk Fill的DOC均大于TPH和Z250，但在三种功率设置下，各RBC的DOC之间未显示出显著差异（P > 0.05）。
