IPS-EMPRESSⅡ全瓷修复变色牙的临床效果  

Evaluate color change of discolored tooth after restored with IPS-EMPRESS Ⅱ ceramics

作　　者：钱海馨[1] 张修银[1] 杨丹苓[1] 

机构地区：[1]上海交通大学医学院附属第九人民医院口腔修复科上海市口腔医学重点实验室,上海200011

出　　处：《国际口腔医学杂志》2011年第3期274-276,共3页International Journal of Stomatology

基　　金：上海市教委重点课题基金资助项目(02BZ33);上海市重点(特色)学科建设基金资助项目(T0202)

摘　　要：目的观察IPS-EMPRESSⅡ全瓷材料对变色牙的修复效果。方法对30例四环素上前牙和30例变色死髓上前牙分别采用IPS-EMPRESSⅡ全瓷贴面和全瓷冠修复。用ShadeEye-NCC电脑比色仪测定修复前后的L、a、b值,根据公式色差ΔEab=(ΔL2+Δa2+Δb2)1/2、Lab=L、Cab=(a2+b2)1/2和Hab=arctan(b/a)计算并分析修复体粘接前后的Lab、Cab、Hab和ΔEab。结果 60例变色牙修复前后颜色明显改变,粘接前后也存在颜色差异。贴面组粘接前后的平均色差为2.37,肉眼可以识别;全瓷冠组粘接前后的平均色差为1.36,肉眼难以识别。贴面组粘接前后Lab、Cab和Hab的差异有统计学意义(P<0.05),全瓷冠组粘接前后Hab差异有统计学意义(P<0.05)。结论 IPS-EMPRESSⅡ全瓷材料可以有效改善变色牙的颜色,贴面修复时应考虑背景的影响来选择合适的粘接剂。Objective The objective of this study was to evaluate the color change of discolored tooth after restored with IPS-EMPRESS Ⅱ ceramics.Methods 30 anterior tetracycline teeth were veneered and 30 anterior discolored teeth after root canal treatment were restored with full crowns.The ShadeEye-NCC color system was used to analyze the change in L,a and b.Then the chromatism[（ΔEab=（ΔL2＋Δa2＋Δb2）1/2）] as well as the value of Lab（Lab=L）,Cab[（Cab=（a2＋b2）1/2）] and Hab[（Hab=arctan（b/a）] were calculated.Results After veneered and crowned the teeth＇s color had obviously changed.Additionally,there were some color changes of 60 teeth between before and after bonding.The average chromatism of the veneered teeth reached 2.37,and the Lab,Cab and Hab had statistical differences（P0.05）.The average chromatism of the crowned teeth reached 1.36,and the Hab had statistical differences（P0.05）.Conclusion The IPS-EMPRESS Ⅱ ceramics can effectively improve the color of discolored tooth.An appropriate bonding agent should be chosen to perfect the final results of the veneered tooth.

关 键 词：IPS-EMPRESSⅡ 瓷贴面 全瓷冠 变色牙 

分 类 号：R783.1[医药卫生—口腔医学]