Journal article
Fracture, roughness and phase transformation in CAD/CAM milling and subsequent surface treatments of lithium metasilicate/disilicate glass-ceramics
AR Alao, R Stoll, XF Song, JR Abbott, Y Zhang, J Abduo, L Yin
Journal of the Mechanical Behavior of Biomedical Materials | ELSEVIER SCIENCE BV | Published : 2017
Abstract
This paper studied surface fracture, roughness and morphology, phase transformations, and material removal mechanisms of lithium metasilicate/disilicate glass ceramics (LMGC/LDGC) in CAD/CAM-milling and subsequent surface treatments. LMGC (IPS e.max CAD) blocks were milled using a chairside dental CAD/CAM milling unit and then treated in sintering, polishing and glazing processes. X-ray diffraction was performed on all processed surfaces. Scanning electron microscopy (SEM) was applied to analyse surface fracture and morphology. Surface roughness was quantitatively characterized by the arithmetic average surface roughness Ra and the maximum roughness Rz using desktop SEM-assisted morphology a..
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Awarded by National Institutes of Health
Funding Acknowledgements
The authors thank Drs. Shane Askew and Kevin Blake of the Advanced Analytical Center and Mr. Kevin Chong of College of Medicine & Dentistry at James Cook University (JCU) for experimental assistance; Mr. Jim Ruddy of Ivoclar Vivadent, Australia for providing e.max CAD blocks; and Mr. Matthew Batty of Sirona, Australia for offering CAD/CAM technical support. A.-R.A acknowledges the JCU PhD Scholarship (JCU IPRS). The work was supported by the JCU Collaboration Grants Scheme; the Australia-China Science and Research Fund from the Department of Industry, Innovation, Climate Change, Science, Research and Tertiary Education, Australia (Grant No. ACSRF GMB 12029); the National Natural Science Foundation of China (Grant No. 51375335); and the United States National Institutes of Health, National Institute of Dental and Craniofacial Research (Grant No. R01DE017925 and Grant No. R01DE026772).