不同表面处理对椅旁瓷块CERECBlocs贴面色彩的影响  

Influence of different surface treatments on color of chairside porcelain veneer made of CEREC Blocs

作　　者：孙佳麒[1] 顾卫平[1] 陈志飞[1] 李林[2] 

机构地区：[1]南京医科大学口腔疾病研究江苏省重点实验室南京医科大学附属口腔医院综合科,江苏省南京市210029 [2]南京医科大学附属口腔医院义齿研制中心,江苏省南京市210029

出　　处：《中国组织工程研究》2017年第6期888-892,共5页Chinese Journal of Tissue Engineering Research

基　　金：江苏高校优势学科建设工程资助项目(2014-37)~~

摘　　要：背景:椅旁计算机辅助设计/计算机辅助制作(computer aided design/computer aided manufacture,CAD/CAM)系统制作瓷贴面方便快捷,然而贴面切削后直接黏固色彩还原不理想,常需要经过各种表面处理获得理想的色彩效果。目的:研究不同表面处理对椅旁CEREC Blocs贴面色彩的影响及其与牙齿的颜色匹配性。方法:选取离体新鲜人上颌中切牙5颗,进行牙体预备。椅旁CAD/CAM制作0.6 mm的CEREC Blocs瓷贴面试件,共25个,随机分组,对照组不做任何处理;其余4组试件分别进行抛光、上釉、抛光上釉、上釉染色处理,选择离体牙和贴面试件唇面中1/3为测量目标区域,用Shade Eye NCC电子比色仪测量试件色彩参数L*a*b*值,计算与离体牙的色差(?E),SPSS 19.0软件对数据进行统计学分析。结果与结论:1与对照组相比,上釉组、抛光上釉组、上釉染色组L*值下降(P<0.05),上釉染色组L*值最低;各组间a*、b*值比较差异无显著性意义(P>0.05);2与对照组相比,上釉组、抛光上釉组、上釉染色组色差ΔE值明显减小(P<0.05),其中上釉染色组色差最小。与对照组相比,上釉组、抛光上釉组、上釉染色组?L*值明显减小(P<0.05),上釉染色组?L*值最低。与对照组相比,仅上釉染色组?b*值明显减小(P<0.05)。各组间?a*值比较差异无显著性意义(P>0.05);3结果表明,通过上釉染色处理,椅旁CEREC Blocs贴面可取得满意的色彩效果。BACKGROUND： It is convenient to fabricate porcelain veeners using chairside computer aided design/computer aided manufacture（CAD/CAM） system. However, the color of the restorations is not ideal when the veener is cemented immediately, so different surface treatments are needed. OBJECTIVE： To investigate the influence of different surface treatments on the color of chairside porcelain veneers made of CEREC Blocs and the color match between the porcelain veneers and teeth. METHODS： Five fresh extracted maxillary central incisors were selected and prepared. Twenty-five 0.6 mm porcelain veneer specimens were fabricated with Sirona CEREC Blocs by chairside CAD/CAM system, and then randomized into five groups. Untreated specimens served as control group. The other four groups were treated respectively by polishing, glazing, glazing after polishing or staining. The color parameters of specimens and the teeth were measured with Shade Eye NCC on the middle 1/3 region of labial surfaces, and color differences（△E） between the specimens and teeth were calculated. Data were analyzed by SPSS 19.0 software. RESULTS AND CONCLUSION： Compared with the control group, the L＊ value of the glazing, glazing after polishing and staining groups were significantly decreased（P〈0.05）. The L＊ value of the staining group was the lowest. The a＊ and b＊ values had no significant differences between groups（P〈0.05）. Compared with the control group, the △E values of glazing, glazing after polishing and staining groups were significantly decreased（P〈0.05）, and the △E value of the staining group was the lowest. The △L＊ values of glazing, glazing after polishing and staining groups were significantly lower than those of the control group（P〈0.05）, and the △L＊ value of the staining group was the lowest. Compared with the control group, only the △b＊ value of staining group was decreased significantly（P〈0.05）. The △a＊ values did not differ significantly between groups（P〈0.05�

关 键 词：牙瓷料 计算机辅助设计 比色法 组织工程 生物材料 口腔生物材料 表面处理 CEREC Blocs 贴面 色彩 椅旁CAD/CAM 

分 类 号：R318[医药卫生—生物医学工程]