Biaxial flexural strength and translucent characteristics of dental lithium disilicate glass ceramics with different translucencies

被引：32
|
作者：
Wang, Fu [1 ,2 ,3 ]
Yu, Tao [1 ,2 ,3 ]
Chen, Jihua [1 ,2 ,3 ]
机构：
[1] Fourth Mil Med Univ, Sch Stomatol, State Key Lab Mil Stomatol, Xian 710032, Peoples R China
[2] Fourth Mil Med Univ, Sch Stomatol, Natl Clin Res Ctr Oral Dis, Xian 710032, Peoples R China
[3] Fourth Mil Med Univ, Sch Stomatol, Shaanxi Key Lab Stomatol, Dept Prosthodont, Xian, Peoples R China
来源：
JOURNAL OF PROSTHODONTIC RESEARCH | 2020年 / 64卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Lithium disilicate glass ceramic; Biaxial flexural strength; Translucency; FRACTURE-TOUGHNESS; PART II; MICROSTRUCTURE; RESISTANCE; SYSTEMS; CORE; P2O5; CRYSTALLIZATION; FABRICATION; ZIRCONIA;
D O I：
10.1016/j.jpor.2019.04.007
中图分类号：
R78 [口腔科学];
学科分类号：
1003 ;
摘要：
Purpose: The aim of this study was to evaluate the biaxial flexural strength and translucent characteristics of dental lithium disilicate glass ceramics with different translucencies. Methods: Two heat pressed lithium disilicate glass ceramics (IPS e.max Press and an experimental ceramic) and one computer aided design/computer aided manufacture (CAD/CAM) lithium disilicate glass ceramic (IPS e.max CAD) with different translucencies were evaluated. Disk-shaped specimens of each group were subjected to a biaxial flexural strength (BFS) test. Translucent parameters (TP) were also tested at 0.5 mm and 1.0 mm thickness, respectively. X-ray diffraction (XRD) and SEM were used for crystalline and microstructural analysis. Results: BFS values of two heat pressed lithium disilicate glass ceramics were significantly higher than the CAD/CAM counterpart. No difference in BFS between two heat pressed glass ceramic was found. There were significant differences in BFS and TP values among the tested subgroups with different translucencies for IPS e.max Press and IPS e.max CAD. No difference in crystalline composition was found among the tested glass ceramics, but microstructure with shorter and wider crystal was revealed for IPS e.max CAD ceramics. Conclusions: Lithium disilicate glass ceramics with different translucencies demonstrated different BFS and TP values. (C) 2019 Japan Prosthodontic Society. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：71 / 77
页数：7
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