Tashiro Hirofumi, Inai Norimichi, Nikaido Toru, Tagami Junji
Cariology and Operative Dentistry, Department of Restorative Sciences, Graduate School, Tokyo Medical and Dental University, Tokyo, Japan.
J Adhes Dent. 2004 Autumn;6(3):233-8.
To evaluate the influence of the light intensity, irradiation time, and thickness of the indirect restoration composite on the bond strength of dual-cured resin cement immediately after cementation, applying the resin coating technique.
Three hundred forty composite blocks as an adhesive surface and four thicknesses of indirect restoration composite disks were prepared. The surface of the composite blocks was coated with low-viscosity resin composite and immersed in water for 24 h. After immersion, dual-cured resin cement was applied to the resin-coated surface and the indirect restoration composite disks were placed on it. Light irradiation was performed through four thicknesses of indirect restoration composite disks with conventional halogen (40 s) and high intensity (10, 20, 40 s) light units. The specimens were stored in water at 37 degrees C for 10 min or 24 h, and the tensile bond test was performed.
For the 1-mm composite thickness, there were no significant differences in the bond strengths between 10 min and 24 h after cementation with the four light curing methods. For the composite thicknesses of 3 or 4 mm, the bond strength 24 h after cementation was significantly higher than that at 10 min after cementation with conventional halogen (40 s) and high-intensity light units at 10 s and 20 s, but there was no significant difference with the high-intensity light unit applied for 40 s.
The bond strength of dual-cured resin cement immediately after cementation could be greatly influenced by the irradiation time and the light intensity penetrating the indirect restoration composite.
应用树脂涂层技术，评估光强度、照射时间和间接修复复合材料厚度对双固化树脂水门汀粘结后即刻粘结强度的影响。
制备340个作为粘结面的复合树脂块和四种厚度的间接修复复合树脂盘。复合树脂块表面涂覆低粘度树脂复合材料并在水中浸泡24小时。浸泡后，将双固化树脂水门汀涂覆于涂有树脂的表面，并在其上放置间接修复复合树脂盘。通过四种厚度的间接修复复合树脂盘，分别使用传统卤素灯（40秒）和高强度光固化灯（10、20、40秒）进行光照。将试件在37℃水中储存10分钟或24小时后进行拉伸粘结试验。
对于1毫米厚的复合材料，四种光固化方法粘结后10分钟和24小时的粘结强度无显著差异。对于3毫米或4毫米厚的复合材料，粘结后24小时的粘结强度显著高于传统卤素灯（40秒）以及10秒和20秒高强度光固化灯粘结后10分钟时的粘结强度，但与40秒高强度光固化灯照射后的粘结强度无显著差异。
双固化树脂水门汀粘结后即刻的粘结强度受照射时间和穿透间接修复复合材料的光强度影响较大。
