Machinability: Zirconia-reinforced lithium silicate glass ceramic versus lithium disilicate glass ceramic

Diamond grinding used in dental adjustment of high-strength zirconia-reinforced lithium silicate glass ceramic (ZLS) and lithium disilicate glass ceramic (LDGC) is challenging in restorative dentistry. This study aimed to compare the machinability of ZLS and LDGC in diamond grinding in terms of mach...

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Bibliographic Details
Published in:Journal of the mechanical behavior of biomedical materials 2020-01, Vol.101, p.103435-103435, Article 103435
Main Authors: Chen, Xing-Peng, Xiang, Zhong-Xia, Song, Xiao-Fei, Yin, Ling
Format: Article
Language:English
Subjects:
Ceramics - chemistry
Dental Porcelain - chemistry
Diamond grinding
Forces and energy
High-strength glass ceramics
Machinability
Mechanical Phenomena
Silicates - chemistry
Surface and subsurface edge chipping damage
Surface Properties
Zirconium - chemistry
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Summary:Diamond grinding used in dental adjustment of high-strength zirconia-reinforced lithium silicate glass ceramic (ZLS) and lithium disilicate glass ceramic (LDGC) is challenging in restorative dentistry. This study aimed to compare the machinability of ZLS and LDGC in diamond grinding in terms of machining forces and energy, debris, surface and edge chipping damage. Grinding experiments in simulation of dental adjustment were conducted using a computer-assisted high-speed dental handpiece and coarse diamond burs. A piezoelectric force dynamometer and a high-speed data acquisition system were used for on-processing monitoring for assessment of grinding forces and energy. Grinding debris and grinding-induced surface and edge chipping damage were examined using scanning electron microscopy. The results show that grinding of ZLS required higher tangential and normal forces and energy than LDGC (p 
ISSN:1751-6161
1878-0180
DOI:10.1016/j.jmbbm.2019.103435