Flexural properties, bond ability, and crystallographic phase of highly translucent multi-layered zirconia
| Autor: | Shogo Minagi, Noriyuki Nagaoka, Masao Irie, Kumiko Yoshihara, Goro Nishigawa, Yukinori Maruo, Takuya Matsumoto |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
crystallographic phase
Diffraction Materials science Surface Properties lcsh:Biotechnology Biomedical Engineering Biophysics Polishing Sintering Bioengineering Crystallography X-Ray Biomaterials Dental Materials X-Ray Diffraction Flexural strength Tensile Strength Phase (matter) lcsh:TP248.13-248.65 Flexural Strength Materials Testing Cubic zirconia bond strength Bond strength Flexural modulus Equipment Design General Medicine Resin Cements Crystallography Stress Mechanical Zirconium Shear Strength zirconia |
| Zdroj: | Journal of Applied Biomaterials & Functional Materials, Vol 18 (2020) |
| ISSN: | 2280-8000 |
| Popis: | This study investigated the mechanical properties, bond ability, and crystallographic forms of different sites in a highly translucent, multi-layered zirconia disk. Flexural properties, bond ability to resin cement, and phase composition were investigated at three sites of a highly translucent, multi-layered zirconia disk: incisal, middle, and cervical. Flexural strength (FS) and flexural modulus (FM) were measured with static three-point flexural test. Shear bond strength (SB) to resin cement was measured after 24 h storage (37°C). Phase composition under mechanical stress was analyzed using X-ray diffraction. Without air abrasion, FS at the incisal site yielded the lowest value and was significantly lower than the middle and cervical sites. Air abrasion lowered the FS of each site. FM at the incisal site without air abrasion showed the significantly lowest value, and air abrasion increased its FM value. At the middle and cervical sites, their FM values were higher than the incisal site but were not significantly affected by air abrasion. SB value did not show significant differences among the sites. After sintering, cubic zirconia was detected at each site. Rhombohedral phase transformation occurred after mirror polishing. In highly translucent, multi-layered zirconia which was mainly composed of cubic zirconia, rhombohedral phase transformation occurred under mechanical stress and resulted in weakened mechanical properties. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|