摘要
目的评价反复烧结对牙科二硅酸锂玻璃陶瓷颜色和透光性的影响。方法制作30个直径10 mm、厚度(1.00±0.01)mm的IPS e.max Press HT A2圆盘试件,随机分为S0、S1、S2、S3、S4、S5共6组(每组5个),分别执行0、1、2、3、4、5次自身上釉程序。使用Shade Eye NCC测色仪测定每组的色彩参数L*、a*、b*,计算色饱和度C*ab及色差ΔE,使用TM-2透射率测试系统测得可见光积分透射比τ。采用SPSS 17.0软件进行方差分析和LSD多重比较。结果随着烧结次数增加,试件的L*值总体呈减小趋势(P<0.05);a*、b*、C*ab和τ值均为先增大后减小(P<0.05)。各组和S0组的ΔE最小为0.89,最大为2.01,在临床可接受范围内。结论反复烧结对二硅酸锂玻璃陶瓷的明度、色相、彩度和透光性均有影响,但色差在临床可接受范围内。
Objective To evaluate the effect of repeated sintering on the color and translucency of dental lithium disilicate- based glass ceramic. Methods Thirty disc specimens （10 mm in diameter, and 1.00 mm±0.01 mm in thickness） were fabri- cated using an IPS e.max Press HT A2 ingot and then randomly divided into six groups （S0, S1, S2, S3, S4, and S5） （n=5）. Each group was sintered 0, 1, 2, 3, 4, and 5 times individually according to the manufacturer＇s recommendation. After po- lishing, ultrasonic cleaning, and drying, the color parameters （L^＊, a^＊, and b^＊ values） and transmittance （r） of all the specimens were measured using a ShadeEye NCC dental colorimeter and a TM-2 spectrophotometer, respectively. Subsequently, C^＊_ab and AE were calculated. The results were statistically analyzed using SPSS 17.0 software for ANOVA and LSD. Results After repeated sintering, the L＊ value significantly decreased （P〈0.05）, and the a^＊, b^＊, and C^＊ab values initially increased and then decreased （P〈0.05）. The color parameters （L^＊, a^＊, and b^＊） and the C^＊_ab values of group $3 were higher than those of the other groups. The ζ values initially increased and then decreased （P〈0.05）, and these values were optimal when sintered twice. In terms of transmittance （ζ）, statistical differences existed between the following groups： SO and S2, SO and S3, S2 and S5, and S3 and S5 （P〈0.05）. Compared with group SO, the color differences AE were 0.89 minimally and 2.01 maxi- mally after different sintering times, which can be clinically acceptable. Conelusion Repeated sintering can affect the color and translucency of the IPS e.max Press lithium disilicate-based glass ceramic, but the color difference can be clinically acceptable.
出处
《华西口腔医学杂志》
CAS
CSCD
北大核心
2015年第1期50-53,共4页
West China Journal of Stomatology
基金
江苏省科技厅临床医学科技专项基金资助项目(SBL20-1230169)
关键词
反复烧结
二硅酸锂玻璃陶瓷
颜色
透光性
repeated sintering
lithium disilicate-based glass ceramic
color
translucency
作者简介
钱冬冬，副主任技师，学士，E-mail：1738876035@qq．com
骆小平，教授，博士，E-mail：L_xiaoping@yahoo．com
