不同桩核对Lava锆瓷冠颜色影响的实验研究

发布时间：2018-05-08 11:10

本文选题：二氧化锆 + 桩核　；参考：《口腔医学研究》2017年07期

【摘要】：目的:研究遮色钴铬合金桩核、氧化锆桩核、纤维桩树脂核、钴铬合金金属桩核对二氧化锆全瓷冠(Lava)颜色的影响。方法:选取因牙周炎拔除的完整上颌中切牙,在釉牙骨质界冠方2.0mm处截冠,完善根管充填治疗和桩道预备,分别制作4种不同桩核预备体各10个,每个桩核再相应制作1个Lava二氧化锆全瓷冠,内冠厚0.5mm,饰面瓷0.7mm。采用Minolta CM一700d分光测色仪,测试4种桩核背景下Lava锆瓷冠唇面中1/3区域L~*、a~*、b~*值,分别进行完全随机设计的单因素方差分析和两两比较的LED检验,并根据公式计算和比较色差△E。结果:4种不同桩核背景下Lava锆瓷冠的L~*、a~*、b~*值间差异有统计学意义(FL=136.206,PL=0.000;Fa=3.454,Pa=0.026;Fb=6.172,Pb=0.000)。3组牙色桩核的色差则均不能为肉眼所识别(△E1.5),钴铬合金桩核组的色差超过临床可接受水平(△E2)。结论:临床应用锆瓷冠(Lava)进行修复时(特别是前牙区),不建议使用金属桩核。
[Abstract]:Aim: to study the effect of shading cobalt-chromium alloy core, zirconia core, fiber pile resin core and cobalt chromium alloy metal post on the color of zirconia all-ceramic crown Lava. Methods: the complete maxillary central incisor was extracted from periodontitis, the crown was cut at 2.0mm, and the root canal filling treatment and pile-canal preparation were improved. Each of the 4 different kinds of post and core preparations was made. A Lava Zirconia all-ceramic crown with a thickness of 0.5 mm and a decorative porcelain of 0.7 mm was made for each post core. Minolta CM-700d spectrometer was used to measure 1 / 3 region of Lava zirconium porcelain crown lip in four kinds of pile-core background. The single-factor ANOVA and the LED test of pairwise comparison were carried out, respectively, and the color difference was calculated and compared according to the formula. Results there were statistically significant differences among the Lava zirconium ceramic crowns in the four different kinds of pile-core backgrounds. There were significant differences in the chromatic aberration of the Lava Zirconium ceramic crowns (P < 0.01). The chromatic aberration of the tooth color post cores of the Lava group was higher than that of the clinical acceptable level (E _ 2 ~ (2) (E _ (2) ~ (2) ~ (2) (E _ (2) ~ (2) (E _ (2) ~ (2). The chromatic aberration of the tooth color post cores in the groups of 6.172g (P ~ (0.17) (E _ (1.5) was higher than the clinical acceptable level (E _ (2). Conclusion: it is not recommended to use metal post core in clinical application of zirconium porcelain crown Lava (especially in anterior teeth).
【作者单位】：珠海市口腔医院修复科;
【基金】：珠海市科技计划项目(编号:20161027E030049)
【分类号】：R783.1

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