• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Journal of Prosthetic Dentistry >Influence of dentin and core porcelain thickness on the color of fully sintered zirconia ceramic restorations
【24h】

Influence of dentin and core porcelain thickness on the color of fully sintered zirconia ceramic restorations

机译：牙本质和核心瓷厚度对完全烧结氧化锆陶瓷修复体颜色的影响

获取原文
获取原文并翻译 | 示例
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Statement of problem The influence of the thickness of dentin and core porcelain, and the glazing procedure on the color of computer-aided design and computer-aided manufacturing ceramic restorations has not been investigated. Purpose This study evaluated the influence of the thickness of dentin and core porcelain and glazing on the color of fully sintered zirconia ceramic restorations. Material and methods Fully sintered zirconia core material was cut into 90 specimens of 0.3 mm (n=30, group ZC1), 0.4 mm (n=30, group ZC2), and 0.5-mm thickness (n=30, group ZC3). On a dentin disk obtained from an extracted molar, the L*, a*, b* values of the specimens were measured at different steps in the laboratory procedures (Zirconia core, Effect Bonder, Effect Liner, dentin porcelain, glazing) with a spectrophotometer. One millimeter dentin porcelain was applied on half of the specimens of each group and 1.5-mm dentin porcelain on the rest. To assess the ability of porcelain substructures to mask the underlying dark colored tooth structure, color difference (ΔE) values between the steps were calculated. Results were statistically analyzed with ANOVA. Results Glazing caused a decrease in the L* values and an increase in the a* and b* values (P<.05). Increasing the thickness of dentin porcelain decreased the L*, a*, and b* values (P<.05). Increasing the zirconia core thickness resulted in an increase in the L* values and a decrease in the a* and b* values (P<.05). Increasing the dentin porcelain thickness from 1 mm to 1.5 mm resulted in a color change below the perceptibility threshold (ΔE<2.6). In the ZC1 group, glazing resulted in a color change perceptible to 50% of observers, whereas, in the ZC2 and ZC3 groups with 1-mm dentin porcelain, the ΔE value was higher than 5.5. However, the color change was perceptible to 50% of the observers in all of the groups with 1.5-mm dentin porcelain. Conclusions Although the thicknesses of the dentin and core porcelain did not influence the final shade of the restoration, glazing resulted in a perceptible color difference.
机译：问题陈述尚未研究牙本质和核心瓷的厚度以及上釉步骤对计算机辅助设计和计算机辅助制造陶瓷修复体颜色的影响。目的本研究评估了牙本质和核心瓷器的厚度以及釉料对完全烧结的氧化锆陶瓷修复体颜色的影响。材料和方法将完全烧结的氧化锆芯材切成90个试样，分别为0.3毫米（n = 30，ZC1组），0.4毫米（n = 30，ZC2组）和0.5毫米厚度（n = 30，ZC3组）。在从提取的磨牙获得的牙本质盘上，使用分光光度计，在实验室程序（锆石芯，效应结合剂，效应内衬，牙本质瓷，玻璃）的不同步骤中测量样品的L *，a *，b *值。在每组样本的一半上应用一毫米的牙本质瓷，其余的样本上应用1.5毫米的牙本质瓷。为了评估瓷器亚结构掩盖潜在的深色牙齿结构的能力，计算了步骤之间的色差（ΔE）值。使用方差分析对结果进行统计分析。结果上光导致L *值降低，a *和b *值增加（P <.05）。增加牙本质瓷的厚度会降低L *，a *和b *值（P <.05）。氧化锆芯厚度的增加导致L *值增加，而a *和b *值减小（P <.05）。牙本质瓷的厚度从1 mm增加到1.5 mm，导致颜色变化低于可感知阈值（ΔE<2.6）。在ZC1组中，上光会导致50％的观察者察觉到颜色变化，而在使用1毫米牙本质瓷的ZC2和ZC3组中，ΔE值高于5.5。但是，在使用1.5毫米牙本质瓷的所有组中，观察者的颜色变化是可察觉的。结论尽管牙本质瓷和核心瓷的厚度不影响修复体的最终色调，但上釉仍会引起明显的色差。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号