瓷层厚度和变色基底对瓷贴面修复四环素牙光学性能的影响  

Effect of porcelain layer thickness and substrate on the optical properties of porcelain veneers for tetracycline stained teeth

作　　者：钱慧芬 林云红[3] 吴美莹 代自超 李星星 Qian Huifen;Lin Yunhong;Wu Meiying;Dai Zichao;Li Xingxing(Yunnan Research Institute of Stomatology,Kunming 650500,China;Dept.of Prosthodontics,Yunnan Second People’s Hospital,Kunming 650021,China;Dept.of Prosthodontics,Affiliated Stomatological Hospital of Kunming Medical University,Kunming 650100,China)

机构地区：[1]云南省口腔医学研究所,昆明650500 [2]云南省第二人民医院口腔修复科,昆明650021 [3]昆明医科大学附属口腔医院口腔修复科,昆明650100

出　　处：《国际口腔医学杂志》2020年第4期413-417,共5页International Journal of Stomatology

基　　金：云南省医疗卫生单位内设机构科研项目(2016NS114);云南省卫生和计划生育委员会医学后备人才基金资助项目(H-201638)。

摘　　要：目的分析不同瓷层厚度和变色基底对瓷贴面修复四环素牙的色彩学性能和半透性的影响。方法用粉浆涂塑烧结法制作瓷试件:体瓷/遮色瓷厚度分别为0.40 mm/0.10 mm、0.30 mm/0.20 mm、0.65 mm/0.10 mm和0.55 mm/ 0.20 mm。利用分光光度计测量试件在模拟四环素牙背景及黑白背景下的L*、a*、b*值,计算试件在模拟四环素牙背景上与背景颜色的色差ΔE001,与试件在白背景上色差ΔE002以及试件的半透性TP值。结果 1)除黄色基底外,其余基底上总厚度0.75 mm的2组色差ΔE001显著大于0.50 mm组,差异有统计学意义(P<0.01)。2)不同背景下,不同厚度瓷试件的色差ΔE002均<1.25,且差异无统计学意义(P>0.01)。3)不同厚度瓷试件TP值均<1,且差异无统计学意义(P>0.01)。结论对于偏黄、偏红和偏灰的四环素牙,选用0.50 mm厚IPS d.SIGN瓷贴面(0.10 mm的遮色瓷与0.40 mm的体瓷)可实现目标色的良好匹配,但其通透性与天然牙相比较差。Objective This study aimed to analyze the color properties and translucency of porcelain veneers with different thicknesses and substrates when used to repair tetracycline stained teeth.Methods Porcelain specimens with different opaque and dentine thicknesses(dentine/opaque:0.40 mm/0.10 mm,0.30 mm/0.20 mm,0.65 mm/0.10 mm,and 0.55 mm/0.20 mm)were fabricated by powder-slurry sintering.L*,a*,and b*parameters were measured under simulated tetracycline and black and white backgrounds by using a spectrophotometer.TheΔE001 andΔE002 color differences among the specimens on simulated tetracycline backgrounds and normal white background,respectively,were calculated.The translucent parameter(TP values)was also examined.Results 1)TheΔE001 of two groups with a total thickness of 0.75 mm were statistically greater than 0.50 mm groups(P<0.01),except for the yellow background.2)TheΔE002 of specimens of different thickness under different substrates were all less than 1.25 and there was no significant difference over different substrates(P>0.01).3)The TP values of all specimens were less than 1,and there was no statistical difference between different thickness groups(P>0.01).Conclusion For yellow,red,and gray tetracycline stained teeth,0.50 mm-thick IPS d.SIGN porcelain veneers(0.10 mm opaque with 0.40 mm dentine)can obtain good color matching with the target color;however,the translucent property of the porcelain veneers is worse than that of natural teeth.

关 键 词：瓷贴面 厚度 四环素牙 遮色性能 色彩匹配性 

分 类 号：R783.1[医药卫生—口腔医学]