2种光固化灯固化对3种不同复合树脂聚合收缩的影响

Effect of polymerization-shrinkage of different resin composites curing by two different light curing units

目的:比较2种光固化灯对3种复合树脂聚合收缩的影响。方法:相移投影栅形貌测量仪测量Z100、Z250、AP-X等3种复合树脂在卤素灯和发光二极管固化灯开始固化后50s及开始固化后400s的树脂聚合收缩量。使用SPSS12.0软件包对QTH及LED固化组聚合收缩量进行单因素方差分析。结果:在开始固化后50s和400s,QTH固化灯和LED固化灯固化Z100、Z250树脂产生的聚合收缩量有显著差异,QTH固化灯固化Z100、Z250树脂产生的聚合收缩量显著大于LED固化灯(P<0.05),QTH和LED固化灯固化AP-X树脂产生的聚合收缩量则无统计学差异(P>0.05)。结论:LED及QTH固化灯固化Z100、Z250树脂产生的聚合收缩影响有显著差异(P<0.05),LED及QTH固化灯固化AP-X产生的聚合收缩无显著差异(P>0.05)。

PURPOSE： To investigate the effect of light-emitting diode（LED） light curing unit（LCU） and quartz-tungsten（QTH） LCU on the polymerization-shrinkage of different resin composites.METHODS： Three composites Z100,Z250,AP-X were irradiated by QTH LCU and LED LCU.Polymerization-shrinkage of 50s and 400s after the composites curing were measured by 3D-profile measuring apparatus by phase-shifted projected grating.The polymerization-shrinkage of LED and QTH curing composites were analysed by SPSS12.0 software package of one-way ANOVA.RESULTS： At 50s curing and 400s curing period,the polymerization-shrinkage of Z100,Z250 resin was different by QTH LCU and LED LCU curing,the polymerization-shrinkage by LED LCU curing was less than that by QTH LCU（P﹤0.05）;the polymerization-shrinkage of AP-X was not statistically different by QTH LCU and LED LCU curing（P﹤0.05）.CONCLUSUINS： The polymerization-shrinkage of Z100,Z250 resin is statistically less cured by LED LCU than QTH;the polymerization-shrinkage of AP-X resin is not statistically different cured by QTH LCU and LED LCU.