试色糊剂对Ips-empressⅡ全瓷贴面颜色的影响  

The influence of the try-in pastes on the colour of all-ceramic veneers

作　　者：张修银[1] 钱海馨[1] 杨丹苓[1] 甘红[1] 闵敏[1] 于卫强[1] 

机构地区：[1]上海交通大学医学院附属第九人民医院.口腔医学院口腔修复科上海市口腔医学研究所,上海200011

出　　处：《上海口腔医学》2007年第2期131-135,共5页Shanghai Journal of Stomatology

基　　金：上海市教育委员会重点课题(02BZ33);上海市重点学科(特色学科)建设项目(T0202)

摘　　要：目的:观察试色糊剂对全瓷贴面颜色的影响。方法:收集临床上严重变色或缺损的上前牙50颗,行全瓷贴面修复(Ips-empressⅡ全瓷系统制作)。贴面粘结前由同一实验人员用试色糊剂试色,将全瓷贴面就位后未涂试色糊剂时作为对照组,用电脑比色仪测定其及5种试色糊剂[A1、A3、Transluent(Trt)、White opaque(WOT)和B0．50oaque(B0．5)]试色后的L*、a*、b*值,用卡尺测量被测点的瓷层厚度,根据公式△Ea*b*=(△L*2+△a*2+△b*2)1/2、Cab=(a*2+b*2)1/2、Hab= arctan(b*／a*)计算每种糊剂试色后的色差及Cab、Hab值,采用单因素方差分析比较色差值(AEa*b*)和L*、Cab、Hab值的变化。结果:50例全瓷贴面被测点的平均瓷层厚度为1．088mm,用5种试色糊剂试色后,与对照组之间的色差大小依次为WOT、B0．5、A3、A1、Trt,WOT糊剂和B0．5糊剂引起的色差分别为2．371NBS和1．842NBS,临床上肉眼可以识别,主要表现为L*值和Cab值增大(P<0．05)。其余3种糊剂引起的色差不明显,其间均无统计学差异(P>0．05)。结论:试色糊剂有遮色作用,且对黏结剂的选择具有一定指导意义。对变色严重的基牙,可以选用遮色性能较强的WOT或B0．5黏结剂,以削弱基牙颜色对贴面颜色的影响;对变色不严重或无需遮色的基牙,可以酌情选用其他3种黏结剂进行粘结。PURPOSE： To study the influenee of the try-in pastes on the color of all-eeramie veneers made by Ipsempress Ⅱ system, METHODS： 50 discolored teeth were collected and restored with all-ceramic veneers. Five try-in pastes including A1, A3, transleueent（Trt）, white opaque（WOT） and B0.5 opaque（B0.5）,which were different in shade, were respeetively used to try in before cementing. The color was measured by the ShadeEye, a digital eolorimeter, anal expressed in terms of 3 eoordinate values （L＊,a＊ ,b＊） of the CIEL＊a＊b＊ system ,Then the color differenees（△Ea＊b＊） of all-ceramic veneers[△Ea＊b＊=（△L＊%△a＊Z＋△b＊Z）＇a] as well as the value of L＊, Ca,[Ce,=（a＊Z＋b＊^2）1/2] and He.[Hab=aretan（b＊/ a＊）]were ealeulated. Meanwhile,the thickness of the measurement point was measured and recorded, One-way ANOVA was used to analyze △Ea＊b＊ as well as L＊,Cab, and Hab, RESULTS： The average thickness of the ceramic was 1,088mm, and the eolour of the veneers after try in with WOT paste and B0.5 paste performed a higher L＊ value than the other pastes（P〈0.05 ）,And the veneers also showed a higher Ce, value after try in with WOT,B0.5 and A3 paste than the A1 and Trt paste （P〈0.05）, No significant differences were found in He, value after these 50 veneers tried in with these five kinds of pastes, CONCLUSIONS： It＇s more advisable to choose the WOT or the B0,5 luting agent to cement the veneer when the abutment tooth is severely discolored, while the Trt or the A1 shade and A3 shade luting resin may be more appropriate if the abutment tooth doesn＇t discolor or a little compared with the adjacent tooth, Supported by Key Research Project of Shanghai Municipal Education Commission （Grant No.02BZ33） and Shanghai Leading Academic Discipline Project （Grant No.T0202）.

关 键 词：试色糊剂 全瓷贴面 颜色 

分 类 号：R783[医药卫生—口腔医学]