Lee S Y, Greener E H
Division of Biological Materials, Northwestern University Dental School, Chicago, Illinois 60611.
J Dent. 1994 Jun;22(3):175-81. doi: 10.1016/0300-5712(94)90202-x.
A number of available dentine adhesives and dental composites require light activation for polymerization. There are many variables which affect the light absorbing properties (e.g. bond strength) of these materials. The purpose of this study was to determine the influence of excitation energy (EE) on the dentine shear bond strength (SBS) of two lengths (2.1 mm and 3.25 mm) of light-cured (or dual-cured) dentine adhesives/dental composites. Diametral tensile (DTS) and compressive (CS) strengths of the same composites were also studied as a function of EE. Three resin composites with their respective adhesives (Marathon One/Tenure, Z100/Scotchbond Multi-Purpose and Herculite XRV/Optibond) were used. Five commercial curing lights were used to produce spectra of 100-650 mW cm-2. The data were analysed using ANOVA and the Tukey LSD test. No significant correlation was observed at the P > 0.05 level between EE and SBS in the shorter specimens. The SBS of Optibond is independent of EE and composite length. The SBS data were also analysed with Weibull statistics. The characteristic strengths calculated varied between 14 and 27 MPa. For the composites tested, mean values of DTS varied between 33 and 54 MPa and CS varied between 167 and 414 MPa. The DTS and CS of Z100 were significantly greater than those of the other materials. Intensities > or = 250 mW cm-2 produced equivalent mechanical properties within all composite materials and equivalent bond strengths in systems which included dentine, adhesive and composite resin.
许多现有的牙本质粘结剂和牙科复合材料需要光激活来进行聚合反应。有许多变量会影响这些材料的光吸收特性（如粘结强度）。本研究的目的是确定激发能量（EE）对两种长度（2.1毫米和3.25毫米）的光固化（或双重固化）牙本质粘结剂/牙科复合材料的牙本质剪切粘结强度（SBS）的影响。还研究了相同复合材料的径向拉伸（DTS）强度和压缩（CS）强度与EE的关系。使用了三种树脂复合材料及其各自的粘结剂（马拉松一号/固位、Z100/多功能 Scotchbond 和 Herculite XRV/Optibond）。使用五台商用固化灯产生100 - 650 mW/cm² 的光谱。数据采用方差分析和 Tukey LSD 检验进行分析。在较短样本中，在 P > 0.05 水平下，未观察到 EE 与 SBS 之间存在显著相关性。Optibond 的 SBS 与 EE 和复合材料长度无关。SBS 数据也用威布尔统计进行了分析。计算出的特征强度在14至27 MPa之间变化。对于所测试的复合材料，DTS 的平均值在33至54 MPa之间变化，CS 在167至414 MPa之间变化。Z100 的 DTS 和 CS 显著高于其他材料。强度≥250 mW/cm² 在所有复合材料中产生了等效的机械性能，在包括牙本质、粘结剂和复合树脂的体系中产生了等效的粘结强度。
