Rely X^(TM) Veneer试色糊剂遮色性的临床评价  

The evaluation of the masking ability of the Rely X^(TM) Veneer try-in pastes

作　　者：钱海馨[1] 张修银[1] 杨丹苓[1] 

机构地区：[1]上海交通大学附属第九人民医院口腔修复科,200011

出　　处：《实用口腔医学杂志》2008年第3期361-363,共3页Journal of Practical Stomatology

基　　金：上海市教委重点课题(编号:02BZ33);上海市重点学科(特色学科)建设项目(编号:T0202)

摘　　要：目的:观察Rely XTM Veneer试色糊剂的遮色性。方法:100颗变色的上前牙,其中50颗全瓷冠修复、50颗全瓷贴面修复(均为Ips-empressⅡ系统制作)。粘接前用试色糊剂[A1、A3、Transluent(Trt)、White opaque(WOT)和B0.5 opaque(B0.5)]代替粘接剂对基牙进行遮色,遮色后用ShadeEye-NCC电脑比色仪测定修复体的L*、a*、b*值,并记录测点的瓷层厚度。数据采用SAS6.12软件处理,根据公式色ΔE=[(ΔL*)2+(Δa*)2+(Δb*)2]1/2、L=L*、C=[(a*)2+(b*)2]1/2、H=arctan(b*/a*)计算并分析每种糊剂试色后的ΔE、L、C和H。,单因素方差分析全冠和贴面组的ΔE、L、C和H。结果:全瓷冠采用5种试色糊剂遮色后,WOT组的色差最大,与A1、A3、Trt、B0.5组之间有统计学差异(P<0.05);全瓷贴面采用5种试色糊剂遮色后,WOT组的色差最大,B0.5组次之,WOT组和与A1、A3、Trt组之间有统计学差异(P<0.05);贴面组与全冠组的色差间有统计学差异(P<0.05)。结论:WOT糊剂的遮色性最强,B0.5糊剂次之,其余3种糊剂的遮色性较为接近;瓷层厚度影响粘接剂的遮色效果。Objective：To evaluate the masking ability of the Rely XTM Veneer try-in pastes. Methods： 100 discolored teeth, including 50 nonvital ones and 50 vital ones, has been collected and restored respectively with allceramic crowns and veneers. Five try-in pastes including A1, A3, Translucent （Trt）, White opaque （WOT） and B0.5 Opaque（ B0.5 ） ,which were different in shade, were used to try in before adhesion. The color was measured by a digital colorimeter, and expressed in terms of 3 coordinate values（ L＊ ,a ＊,b＊ ） of the CIE1976- L＊ a＊ b＊ system. Then the color differences of crowns and veneers △E = [ （ AL＊ ） 2 ＋ （ Aa＊ ） 2 ＋ （ Ab＊ ） 2 ] 1/2 as well as the value of Light （ L = L＊ ）, Chroma[ C = [ （ a＊ ）2 ＋ （ b＊ ）2]1/2 ] and Hue [ H = arctan（ b＊/a＊ ） ] were calculated. The thickness of the measurement point was also measured and recorded. A one-way ANOVA was used to analyze AE as well as L, C and H. Results：The chromatism of the veneers after try-in was higher than that of the crowns （ P 〈 0.05 ）. The WOT paste and the B0.5 paste caused greater chromatism both in veneers and crowns than other pastes （ P 〈 0.05 ）. Conclusion： The shade masking ability of the WOT paste and the B0.5 paste were stronger than other pastes. With the change of thickness of the ceramic, it＇s better to consider the influence of the luting agent on the color of all-ceramic restoration.

关 键 词：试色糊剂 全瓷贴面 全瓷冠 色差 

分 类 号：R783.3[医药卫生—口腔医学]