摘要
目的:观察对比E-max和IPS-EMPRESSS Ⅱ两种全瓷贴面对变色牙颜色改善的修复效果,为临床应用提供参考。方法:对36颗变色上前牙分别采用E-max和IPS—EMPRESS Ⅱ全瓷贴面修复。用Shade-Eye-NCC电脑比色仪分别测定修复前牙齿、贴面就位(无试色糊剂)和试粘接(分别用WOT和Tro试色糊剂)及最后粘接后两种修复体唇侧的中1/3处的L*、a*、b*值,根据色差公式△E=[(△L*)2+(△a*)2+(△b*)2]1/2,对比两种瓷贴面对变色牙的修复效果,为临床应用提供参考。结果:IPS-EMPRESSSⅡ全瓷贴面粘接后与牙体预备前的色差值为7.9960,粘接后与试戴(无试色糊剂)的色差值为2.3906,粘接后与试戴(有试色糊剂)的色差值为1.6578。E-max全瓷贴面粘接后与牙体预备前的色差值为8.2428,粘接后与试戴(无试色糊剂)的色差值为1.4638,粘接后与试戴(有试色糊剂)的色差值为1.2596。两组全瓷贴面试戴后(无试色糊剂)、试粘接(有试色糊剂)、粘接后与基牙牙体预备前△E*在统计学上差异有显著性,两组全瓷贴面修复前后的的L*、a*、b*值之间有统计学差异,修复后的L*增大,a*、b*值减少。试粘接后L*值和b*值增大,a*值减少。修复后的L*、a*、b*值与贴面自身相比存在差异,修复后的L*值偏小,a*、b*值偏大。两组瓷贴面在采用WOT糊剂粘接后L*值、b*值最大,与Trt组比,差异均有统计学意义。结论:E-max全瓷贴面比IPS-EMPRESSSⅡ全瓷贴面更有效改善变色牙的颜色,IPS-EMPRESSSⅡ全瓷贴面粘接后较试戴(无试色糊剂)明亮度降低比E-max瓷贴面明显。
Objective： To evaluate the color changes of discolored tooth after restored with E-max and IPS-EMPRESS Ⅱ ceramics.Methods： Thirty-six anterior discolored teeth were veneered.The ShadeEye-NCC color system was used to analyze the changes in L＊,a＊,b＊.Then the chromatism（△E =[（△L＊）2 ＋（△a＊）2 ＋（△b＊）2 ]1/2） was calculated.Results： The colors of the veneered teeth changed obviously.Before and after restoration,the L＊,a＊,b＊ values in both Group E-max and Group IPS-EMPRESS Ⅱwere significantly different,with increased L＊ value and decreased a＊ and b＊ value.The colors of veneered teeth were different compared with veneers alone,with lower L＊ value and higher a＊ and b＊ value.The veneered teeth after try-in with White opaque paste exhibited higher L＊ and b＊ value compared with Trt paste.Conclusion： The E-max and IPS-EMPRESS Ⅱ ceramics could effectively improve the color of discolored teeth.
出处
《口腔颌面修复学杂志》
2011年第5期296-299,共4页
Chinese Journal of Prosthodontics
关键词
全瓷贴面
变色牙
色差
ceramic veneer
discolored tooth
chromatism
