Preparation and property analysis of a novel dental lithium disilicate glass-ceramic

VernacularTitle:一种新型牙科二硅酸锂玻璃陶瓷的制备及性能分析
Author: Kun YUAN ; Fu WANG ; Jing GAO ; Xiang SUN ; Zaixi DENG ; Hui WANG ; Jihua CHEN
Publication Type:Journal Article
Keywords: Lithium disilicate; Glass-ceramic; Property; Translucency parameter; Dental ceramic
From: Journal of Practical Stomatology 2015;(3):323-326
CountryChina
Language:Chinese
Abstract: Objective:To prepare a novel dental lithium disilicate glass-ceramic,and to study its properties.Methods:A2 colored novel glass-ceramic was prepared by sintering technique.The flexural strength,density,elastic modulus,hardness,fracture toughness, translucency and microstructure of the novel glass-ceramic and IPS e.max Press (LT A2,MO1 and HO1 )ceramic ingots were studied. Results:The novel glass-ceramic demonstrated a lower flexural strength (31 5 MPa)than MO ceramic ingot(338 MPa)(P <0.05). The other mechanical properties of the novel glass-ceramic were similar to those of LT and MO ceramic ingots(P >0.05).The translu-cency parameter of the novel glass-ceramic(21 .2)was higher than that of HO(1 6.5)but lower than that of LT(27.8)and MO(27.5) ceramic ingots(P <0.05).SEMimages showed an interlocking microstructure of rod-shaped Li2 Si2 O5 crystals in all the glass-ceramics investigated.Conclusion:The mechanical properties,translucency and microstructure of the novel glass-ceramic are similar to those of IPS e.max Press ceramic ingots,which can meet the requirements of clinical application.