不同温度及不同光固化灯对光固化复合树脂硬度的影响  

The influence of temperature and curing light units on the microhardness of composite resin

作　　者：吴晓霞[1] 杨海鸥[1] 

机构地区：[1]首都医科大学附属北京同仁医院口腔科,北京100730

出　　处：《上海口腔医学》2010年第1期104-106,共3页Shanghai Journal of Stomatology

摘　　要：目的:探讨不同温度处理后的光固化复合树脂用卤素光固化灯和第2代LED光固化灯照射后复合树脂硬度的差别。方法:设5℃(冷藏)、23℃(常温)、40℃(加热)3种不同温度处理光固化复合树脂Clearfil AP-X,再分别用卤素光固化灯Translux CL和LED灯Elipar FreeLight2照射,采用显微维氏硬度计测量树脂试件表面和底部的硬度。结果采用SPSS 17.0软件包进行方差分析。结果:40℃加热处理后的树脂试件表面和底部的硬度值均较其他2种温度处理后的树脂硬度值增高(P<0.01)。3种温度处理后,LED灯照射树脂试件表面和底部硬度值比卤素灯照射后的硬度值高(P<0.01)。结论:树脂试件使用前预加热处理,可以增强树脂的硬度;第2代LED灯的固化效率优于卤素灯。PURPOSE： To investigate the effect of different temperature and different light curing units on the hardness of composite resin. METHODS： Specimens were fabricated from Clearfil AP-X composite resin （Kuraray,Japan）and stored at three different temperature （5℃,23℃,40℃）.Then they were cured by a quartz tungsten halogen Translux CL or a second generation LED Elipar FreeLight2. The microhardness of the top and bottom surfaces of the specimens were determined using a digital microhardness tester. Statistical analyses were performed using the two-way ANOVA by SPSS 17.0 software package. RESULTS： Whether cured by QTH or LED, the specimens stored at 40℃ had higher top and bottom hardness value than that stored at the other temperatures （P〈0.01）. The LED light produced a significantly better hardness on top and bottom surfaces of specimens stored at the three different temperatures（P〈0.01）. CONCLUSIONS： The use of pre-warmed composite resins might help to increase the composite resin hardness. Second generation LED is more efficient than halogen light unit.

关 键 词：复合树脂 光固化灯 显微硬度 树脂温度 

分 类 号：R783.1[医药卫生—口腔医学]