应用分光光度仪比较深度变色基牙表面4种全瓷冠色度学特征

发布时间：2018-06-10 17:10

本文选题：分光光度比色仪 + 全瓷　；参考：《口腔医学研究》2015年03期

【摘要】：目的:采用分光光度比色仪评估深度变色ND8基底表面4种全瓷冠各部分色度学参数CIE L*a*b*值及与目标色片色差。方法:制作ND8色基牙预备体,分别戴入Procera氧化铝、Procera氧化锆、Lava氧化锆、IPS E.max高度不透明压铸陶瓷底冠,分光光度仪对颈部、体部、切端测色。4组底冠经烧结A2体瓷后戴入基底(总瓷层厚度控制1.5mm),分光光度仪同法测色,以Vitapan比色板A2体瓷色片为对照,对数据进行单因素方差分析、均数比较Bonferroni检验,计算P值。结果:4组底冠均提高基牙的L*值,降低彩度a*、b*值,多数组间各部位L*、a*、b*有统计学差异。烧结体瓷后,各组L*略下降,a*、b*明显上升。各部分与A2色差显著减小(1.45∽3.70)。结论:4组全瓷底冠对变色基底都有较好遮色性,但各组底冠明度、彩度不一致。烧结体瓷后颜色有差异的组别减少,各组与目标色片差别在临床可接受范围。
[Abstract]:Objective: To evaluate the chromaticity parameters CIE L*a*b* value of 4 kinds of all ceramic crowns on the surface of ND8 base surface with spectrophotometric colorimeter and the color difference between the target color and the target color. Method: making ND8 color base preparation, wearing Procera alumina, Procera zirconium oxide, Lava zirconium oxide, IPS E.max high opaque die-casting ceramic bottom crown and spectrophotometer pair The base crown of group.4 of neck, body and cut end color test was worn into the base after sintering A2 body porcelain and the thickness of the total porcelain layer was controlled 1.5mm. The spectrophotometer was used to measure color with the same method. The data was analyzed by single factor analysis of variance, Bonferroni test and P value were compared with the Vitapan colorimetric plate A2 body porcelain color tablets. The results showed that the 4 groups of bottom crowns all increased the L* value of the base teeth and reduced the color degree. A*, b* value, L*, a*, b* in most groups were statistically different. After sintered porcelain, L* decreased slightly, a*, b* increased obviously. The color difference between each part and A2 decreased significantly (1.45. 3.70). Conclusion: the 4 groups of all ceramic bottom crowns have better shade on the discoloured base. The difference between each group and target color patch is in clinical acceptable range.
【作者单位】：广东省口腔医院修复科;南方医科大学附属口腔医院;
【基金】：广东省医学科研基金(编号:A2013103)
【分类号】：R783.3

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