Effect of intermediate ceramics and firing temperature on bond strength between tetragonal zirconia polycrystal and veneering ceramics
| Autor: | Masayuki Hattori, Masao Yoshinari, Eiji Kawada, Naoya Matsumoto, Shinji Takemoto, Yutaka Oda |
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| Rok vydání: | 2013 |
| Předmět: |
Ceramics
Hot Temperature Electron probe microanalysis Materials science Bond strength Mineralogy Shear bond law.invention Dental Veneers law visual_art Materials Testing Microscopy Electron Scanning Ceramics and Composites visual_art.visual_art_medium Cubic zirconia Zirconium Ceramic Crystallization Composite material General Dentistry Tetragonal zirconia Dental veneers Electron Probe Microanalysis |
| Zdroj: | Dental Materials Journal. 32:734-743 |
| ISSN: | 1881-1361 0287-4547 |
| Popis: | The purpose of the present study was to investigate the influence of the intermediate ceramics and firing temperature on bond strength between tetragonal zirconia polycrystal (TZP) and its intermediate ceramics. Two types of intermediate ceramics, defined as a ceramics placed between the TZP and its veneering ceramics, were used; one including high-strength lithium-disilicate (EP) or feldspathic liner porcelain (SB). The firing temperature of the intermediate ceramics was set at 930°C, 945°C or 960°C. Shear bond strength showed values of 35.8 MPa in SB and 54.9 MPa in EP at a firing temperature of 960°C. Electron probe microanalysis revealed that components of the intermediate ceramics remained on the TZP surface after debonding, indicating that fractures occurred in the intermediate ceramics near the TZP. These results indicate that the bond strength between and a TZP framework and its veneering ceramics could be improved by using a high-strength intermediate ceramics and a comparatively high firing temperature. |
| Databáze: | OpenAIRE |
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