口腔医学研究

口腔医学研究 ›› 2020, Vol. 36 ›› Issue (3): 273-275.DOI: 10.13701/j.cnki.kqyxyj.2020.03.020

• 修复材料性能研究 • 上一篇    下一篇

不同核饰瓷厚度对CAD/CAM玻璃陶瓷材料透明性的影响

赵军, 樊洪*   

  1. 天津市口腔医院修复一科 天津 300041
  • 收稿日期:2019-11-11 出版日期:2020-05-15 发布日期:2020-05-15
  • 通讯作者: 樊洪,E-mail:afanhong@126.com
  • 作者简介:赵军(1984~),男,天津人,硕士,主治医师,主要从事口腔修复的临床工作和基础工作。

Influence of Thickness of Core and Veneer Ceramics on Transparency of CAD/CAM Glass Ceramics

ZHAO Jun, FAN Hong*   

  1. Department of Prosthodontics, Tianjin Stomatological Hospital, Tianjin 300041, China
  • Received:2019-11-11 Online:2020-05-15 Published:2020-05-15

PDF (PC)

174

摘要： 目的：探讨不同核饰瓷厚度的CAD/CAM玻璃陶瓷的对比度(contrast ratio,CR)以及与A2色测色试件的色差ΔE。方法：将IPS e.max CAD瓷块和IPS Empress CAD瓷块加工成厚度分别为0.8、1.0、1.2 mm的方型核心瓷片,然后在核心瓷上烧结厚度分别为0.7、0.5、0.3 mm的相应饰瓷,最后上釉。共制作30片12×12 mm、总厚度为1.5 mm的瓷试件(n=5)。采用CM-3600A分光测色计测量试件的色度值,用来计算试件的对比度(contrast ratio,CR)和与A2色片的色差(ΔE)。结果：IPS e.max CAD组的CR值明显大于IPS Empress CAD组。IPS e.max CAD组的ΔE值小于IPS Empress CAD组。结论：不同核瓷厚度组合的IPS e.max CAD和IPS Empress CAD都能较好的模拟目标颜色; IPS Empress CAD 的透明性要高于IPS e.max CAD。

关键词: 玻璃陶瓷, 透明性, 厚度, 对比度

Abstract: Objective: To explore the contrast ratio (CR) of different thickness of core and veneer of CAD/CAM glass ceramics and the color difference (ΔE) with A2 color test piece. Methods: The IPS e.max and IPS Empress CAD ceramic blocks were processed into square core porcelain with thickness of 0.8, 1.0, and 1.2 mm, respectively. The core porcelain was sintered with 0.7, 0.5, and 0.3 mm veneer porcelain, and finally glazed. A total of 30 porcelain specimens with 12×12 mm and 1.5 mm in the thickness were made (n=5). CM-3600A spectrophotometer was used to measure the color parameters of the specimens, which was used to calculate the CR of the specimens and the ΔE with A2 color test piece. Results: The CR value of IPS e.max CAD group was significantly higher than that of IPS Empress CAD group. The ΔE value of IPS e.max CAD group was less than that of IPS Empress CAD group. Conclusion: IPS e.max CAD and IPS Empress CAD can better simulate the target color with different thickness of core and veneer. The transparency of IPS Empress CAD is higher than that of IPS e.max CAD.

Key words: glass ceramic, optical properties, thickness, contrast ratio