摘要
目的评价人工老化前后计算机辅助设计与辅助制作(computer aided design and computer aided manufacture,CAD/CAM)复合陶瓷-树脂水门汀联合体的颜色稳定性,为临床合理选择和应用CAD/CAM复合陶瓷贴面提供参考。方法将3种厚度(0.50、0.75、1.00 mm)CAD/CAM复合陶瓷(Lava Ultimate)分别与4种色调(A1、A3、T、BL1)光固化树脂水门汀(Variolink N)匹配制备CAD/CAM复合陶瓷-树脂水门汀联合体样本,共12组(每组10个样本),作为色调组;以3种厚度(0.50、0.75、1.00 mm)CAD/CAM复合陶瓷样本作为对照组(每组10个样本)。所有样本同时置于氙灯老化仪中进行人工老化,采用分光光度仪测量老化前后各组样本明度(L*)、红绿色品(a*)和黄蓝色品(b*)值,计算老化前后的色差值(ΔE)。采用双因素方差分析检验复合陶瓷厚度和树脂水门汀色调对CAD/CAM复合陶瓷-树脂水门汀联合体老化前后ΔE的影响以及二者之间是否存在交互作用。结果各组CAD/CAM复合陶瓷-树脂水门汀联合体老化前后ΔE均<3.3。双因素方差分析显示,复合陶瓷厚度对联合体样本ΔE有影响(F=27.025,P<0.001),树脂水门汀色调对联合体样本ΔE也有影响(F=15.606,P<0.001),两者不存在交互作用(F=0.534,P=0.829)。结论CAD/CAM复合陶瓷厚度和树脂水门汀色调均可影响CAD/CAM复合陶瓷-树脂水门汀联合体的颜色稳定性,但这种影响均在临床可接受范围内。
Objective To investigate the color stability of computer aided design and computer aided manufacture(CAD/CAM)composite ceramic/resin cements after accelerated ageing.Methods Twelve groups(ten samples each group)were used as experimental groups,which were composed of CAD/CAM composite ceramic of three kinds of thickness(0.50,0.75,1.00 mm)(Lava Ultimate)associated with resin cements(Variolink N)of four colors(A1,A3,T,BL1).Another three groups of CAD/CAM composite ceramic/resin cements of three different kinds of thickness(0.50,0.75,1.00 mm)were used as control groups(ten samples each group).All samples were put into the xenon lamp ageing instrument to implement accelerated ageing.Spectrophotometers were used to measure the lightness(L*),red green color value(a*)and blue yellow color value(b*)of all samples before and after accelerated ageing process,and the changes of color variation(ΔE)was calculated.The effect of composite ceramic thickness and resin cement color on the changes of color variation(ΔE)before and after the ageing of CAD/CAM composite ceramic/resin cement and whether there was an interaction between them were tested by two-way ANOVA.Results Before and after accelerated ageing,theΔE of CAD/CAM composite ceramic/resin cements were<3.3.Two-way ANOVA showed that the thickness of CAD/CAM composite ceramics had an effect onΔE(F=27.025,P<0.001),and the color of resin cement also had an effect onΔE(F=15.606,P<0.001),but there was no interaction between them(F=0.534,P=0.829).Conclusions The thickness of CAD/CAM composite ceramics and the color of resin cements could both affect the color stability of composite ceramic/resin cements combination.However,the resulted color change is within the clinically acceptable range.
作者
王立凯
刘亚男
惠慧
李萍萍
Wang Likai;Liu Yanan;Hui Hui;Li Pingping(Department of Stomatology,Beijing Boai Hospital,China Rehabilitation Research Center,Beijing 100068,China)
出处
《中华口腔医学杂志》
CAS
CSCD
北大核心
2019年第11期765-769,共5页
Chinese Journal of Stomatology
