一种新型超透明氧化锆陶瓷的颜色和结构稳定性评价

›› 2020, Vol. 40 ›› Issue (2): 97-100.

• 基础研究 • 下一篇

一种新型超透明氧化锆陶瓷的颜色和结构稳定性评价

沈佳娣¹,谢海峰¹,何峰²,陈晨³

1. 南京医科大学
2. 江苏省口腔医院
3. 南京医科大学附属口腔医院

收稿日期:2019-08-09 修回日期:2019-09-25 出版日期:2020-02-28 发布日期:2020-02-20
通讯作者: 陈晨 E-mail:ccchicy@njmu.edu.cn
基金资助:
国家自然科学基金;江苏省自然科学基金;江苏高校优势学科建设工程资助项目

Evaluation of the color and structural stability of a novel ultratransparent zirconia ceramic after aging in vitro

Received:2019-08-09 Revised:2019-09-25 Online:2020-02-28 Published:2020-02-20

摘要/Abstract

摘要： 目的　评价一种新型超透明氧化锆体外经受低温老化后的颜色和结构稳定性。方法　制备不同厚度（0.5、1.0、1.2和1.5mm）的Katana UTML (KU)氧化锆试件各5枚，使用牙科色度计测量试件的CIE L* a* b*参数，计算各个厚度的老化前后（温度134℃、压力0.2MPa的高压灭菌锅内持续20小时）的色差值（△E），并利用统计软件SPSS 21.0对△E进行统计分析。同时，在老化前后分别对试件进行X射线衍射（XRD）和扫描电子显微镜（SEM）分析，用以评价KU体外老化后的结构稳定性。结果　不同厚度的KU在老化前后的色差值（△E）范围为0.96~1.50，均在临床可接受的范围之内。X射线衍射图和扫描电镜结果发现，KU老化前后的晶相和表面微观形态（如晶粒尺寸）未发生明显变化。结论　无论是否老化，Katana UTML具有较好的颜色和结构稳定性。

关键词: 氧化锆陶瓷, 低温老化, 颜色, 微观结构

Abstract: Abstract：　Objective　To evaluate the color and structural stability of a novel ultra-transparent zirconia ceramic after aging in vitro. Methods　A novel ultra-transparent zirconia ceramic Katana UTML (KU) with different thicknesses (0.5、1.0、1.2 and 1.5mm) were selected (n=5 per group) and then, the CIE L* a* b* parameters of each sample were measured with a dental colorimeter, which was used to calculate the color values with different thicknesses on a white background for the color difference (△E) before and after aging (in an autoclave at 134℃ under 0.2MPa for 20h). Statistical analysis of △E was performed using the SPSS 21.0 statistical software. Furthermore, X-ray diffraction (XRD) and scanning electron microscope (SEM) were applied to evaluate the structural stability of KU after aging. Results　The △E of KU with different thicknesses before and after aging ranged from 0.96 to 1.50, which was acceptable in clinic. The results of XRD and SEM showed that there was no obvious changes in the crystal phase and surface micro-morphology (such as grain size) of KU before and after aging. Conclusions　Katana UTML possesses good color and structural stability regardless of aging.

Key words: zirconia ceramic, lowtemperature degradation, color, microstructure

中图分类号:

R783.1

沈佳娣谢海峰何峰陈晨. 一种新型超透明氧化锆陶瓷的颜色和结构稳定性评价[J]. 口腔医学, 2020, 40(2): 97-100.

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一种新型超透明氧化锆陶瓷的颜色和结构稳定性评价

Evaluation of the color and structural stability of a novel ultratransparent zirconia ceramic after aging in vitro

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