Improvement in Ti-porcelain bonding by SiO2 modification of titanium surface through cast method
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概要
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This study aimed to improve Ti-porcelain bonding strength through SiO2 modifications. Wax patterns were coated with SiO2 mixed with tetraethoxy silane (group C), patterns without coating were used as controls and subdivided into sandblasting group (group S) and polishing group (group P). Castingsurfaces were analyzed with XRD, while Ti-ceramic interfaces were characterized using SEM/EDS. Metal-ceramic specimens were tested in three point bending, and characterizations were also analyzed with SEM/EDS of porcelain debonding surfaces. In group C, SiO2 and Ti5Si3 phases were observed; SEM micrograph showed that Ti-porcelain had a compacted interface, and EDS maps of the interface illustrated the diffusion of Si, Al, and Sn to Ti, and cohesive fracture within the bonding agent. The bond strength of group C was 39.04±5.0 MPa, which was 15% higher than that of group S and 32% higher than that of group P. SiO2 coating could improve Ti-porcelain bond strength.
著者
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Liu Xu
College Of Life Sciences Guangdong Key Lab Of Biotechnology For Plant Development South China Normal
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Ding Ning
Beijing Institute Of Dental Research Capital Medical University School Of Stomatology
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ZHANG Zutai
Beijing Institute of Dental Research, Capital Medical University School of Stomatology, Beijing Stomatological Hospital
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WEI Yanhua
Beijing Institute of Dental Research, Capital Medical University School of Stomatology, Beijing Stomatological Hospital
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ZHENG Dongxiang
Beijing Institute of Dental Research, Capital Medical University School of Stomatology, Beijing Stomatological Hospital
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LI Hui
College of Materials Science and Engineering, Beijing University of Technology
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