临床口腔医学杂志2017，Vol.33Issue(7)：407-409,3.DOI:10.3969/j.issn.1003-1634.2017.07.008
金属桩核表面遮色对玻璃陶瓷冠颜色和边缘适合性的影响
A study on color-masking Co-Cr mental post-cores of color and marginal fit of glass-ceramic crowns
摘要
Abstract
Objective:To study the color-masking Co-Cr alloy post-cores on color and marginal fit of lithium dicilicate glass-ceramic crown.Methods:An intact extracted maxillary central incisor was received endodontic treatment and the post''s root canal was prepared.They were divided into two groups randomly that each ten of color-masking Co-Cr alloy post-cores and Co-Cr alloy post-cores were made for these root canals,and A2 lithium dicilicate glass-ceramic crowns were manufactured for every prepared post-core.The color parameter values(L*,a*and b*)of the middle 1/3 of the crown were measured by the CM-700 d spectrophotometric tester for the two groups,and the △E were calculated.Distance between each crown''s margin and the abutment was recorded at 50 points randomly using by measuring microscope.Results:It was obvious different on the values of L*,a*,and b*in the two groups.The color difference of color-masking Co-Cr alloy post-cores could not be identified by the naked eye(△E＜1.5),while the △E value in the Co-Cr alloy post-cores group was beyond the level that could be accepted on clinic(△E＞2).The marginal fit of the Co-Cr post-cores was(63.34±7.8)μm,color-masking Co-Cr post-cores was(87.47±11.3)μm,that were all clinically acceptable.Conclusion:If the metal alloy post-core is needed in the glass-ceramic system,the color-masking Co-Cr alloy post-cores can be considered,but its adaptation must been consideration.关键词
桩核/二硅酸锂/颜色参数/适合性Key words
Post-core/Lithia disilicate/Color parameter/Fit分类
医药卫生引用本文复制引用
肖丹,刘英路,何建慧..金属桩核表面遮色对玻璃陶瓷冠颜色和边缘适合性的影响[J].临床口腔医学杂志,2017,33(7):407-409,3.基金项目
珠海市科技计划项目(20161027E030049) （20161027E030049）
