Change of phase transformation and bond strength of Y-TZP with various hydrofluoric acid etching
ObjectivesThe purpose of this study was to quantify phase transformation after hydrofluoric acid (HF) etching at various concentrations on the surface of yttria-stabilized tetragonal zirconia polycrystal (Y-TZP), and to evaluate changes in bonding strength before and after thermal cycling.Materials...
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Korean Academy of Conservative Dentistry
2021-11-01
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| Series: | Restorative Dentistry & Endodontics |
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| Online Access: | http://rde.ac/upload/pdf/rde-46-e54.pdf |
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| author | Mi-Kyung Yu Eun-Jin Oh Myung-Jin Lim Kwang-Won Lee |
| author_facet | Mi-Kyung Yu Eun-Jin Oh Myung-Jin Lim Kwang-Won Lee |
| author_sort | Mi-Kyung Yu |
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| description | ObjectivesThe purpose of this study was to quantify phase transformation after hydrofluoric acid (HF) etching at various concentrations on the surface of yttria-stabilized tetragonal zirconia polycrystal (Y-TZP), and to evaluate changes in bonding strength before and after thermal cycling.Materials and MethodsA group whose Y-TZP surface was treated with tribochemical silica abrasion (TS) was used as the control. Y-TZP specimens from each experimental group were etched with 5%, 10%, 20%, and 40% HF solutions at room temperature for 10 minutes. First, to quantify the phase transformation, Y-TZP specimens (n = 5) treated with TS, 5%, 10%, 20% and 40% HF solutions were subjected to X-ray diffraction. Second, to evaluate the change in bond strength before and after thermal cycling, zirconia primer and MDP-containing resin cement were sequentially applied to the Y-TZP specimen. After 5,000 thermal cycles for half of the Y-TZP specimens, shear bond strength was measured for all experimental groups (n = 10).ResultsThe monoclinic phase content in the 40% HF-treated group was higher than that of the 5%, 10%, and 20% HF-treated groups, but lower than that of TS-treated group (p < 0.05). The 40% HF-treated group showed significantly higher bonding strength than the TS, 5%, and 10% HF-treated groups, even after thermal cycling (p < 0.05).ConclusionsThrough this experiment, the group treated with SiO2 containing air-borne abrasion on the Y-TZP surface showed higher phase transformation and higher reduction in bonding strength after thermal cycling compared to the group treated with high concentration HF. |
| format | Article |
| id | doaj-art-d0f697dadf6540e7b5ca0c62dac00ef6 |
| institution | Matheson Library |
| issn | 2234-7658 2234-7666 |
| language | English |
| publishDate | 2021-11-01 |
| publisher | Korean Academy of Conservative Dentistry |
| record_format | Article |
| series | Restorative Dentistry & Endodontics |
| spelling | doaj-art-d0f697dadf6540e7b5ca0c62dac00ef62025-07-03T04:25:09ZengKorean Academy of Conservative DentistryRestorative Dentistry & Endodontics2234-76582234-76662021-11-01464e5410.5395/rde.2021.46.e54994Change of phase transformation and bond strength of Y-TZP with various hydrofluoric acid etchingMi-Kyung Yu0Eun-Jin Oh1Myung-Jin Lim2Kwang-Won Lee3Department of Conservative Dentistry, Jeonbuk National University School of Dentistry, Jeonju, KoreaDepartment of Conservative Dentistry, Jeonbuk National University School of Dentistry, Jeonju, KoreaDepartment of Conservative Dentistry, Jeonbuk National University School of Dentistry, Jeonju, KoreaDepartment of Conservative Dentistry, Jeonbuk National University School of Dentistry, Jeonju, KoreaObjectivesThe purpose of this study was to quantify phase transformation after hydrofluoric acid (HF) etching at various concentrations on the surface of yttria-stabilized tetragonal zirconia polycrystal (Y-TZP), and to evaluate changes in bonding strength before and after thermal cycling.Materials and MethodsA group whose Y-TZP surface was treated with tribochemical silica abrasion (TS) was used as the control. Y-TZP specimens from each experimental group were etched with 5%, 10%, 20%, and 40% HF solutions at room temperature for 10 minutes. First, to quantify the phase transformation, Y-TZP specimens (n = 5) treated with TS, 5%, 10%, 20% and 40% HF solutions were subjected to X-ray diffraction. Second, to evaluate the change in bond strength before and after thermal cycling, zirconia primer and MDP-containing resin cement were sequentially applied to the Y-TZP specimen. After 5,000 thermal cycles for half of the Y-TZP specimens, shear bond strength was measured for all experimental groups (n = 10).ResultsThe monoclinic phase content in the 40% HF-treated group was higher than that of the 5%, 10%, and 20% HF-treated groups, but lower than that of TS-treated group (p < 0.05). The 40% HF-treated group showed significantly higher bonding strength than the TS, 5%, and 10% HF-treated groups, even after thermal cycling (p < 0.05).ConclusionsThrough this experiment, the group treated with SiO2 containing air-borne abrasion on the Y-TZP surface showed higher phase transformation and higher reduction in bonding strength after thermal cycling compared to the group treated with high concentration HF.http://rde.ac/upload/pdf/rde-46-e54.pdfy-tzphydrofluoric acidphase transformationthermal cyclingbond strength |
| spellingShingle | Mi-Kyung Yu Eun-Jin Oh Myung-Jin Lim Kwang-Won Lee Change of phase transformation and bond strength of Y-TZP with various hydrofluoric acid etching Restorative Dentistry & Endodontics y-tzp hydrofluoric acid phase transformation thermal cycling bond strength |
| title | Change of phase transformation and bond strength of Y-TZP with various hydrofluoric acid etching |
| title_full | Change of phase transformation and bond strength of Y-TZP with various hydrofluoric acid etching |
| title_fullStr | Change of phase transformation and bond strength of Y-TZP with various hydrofluoric acid etching |
| title_full_unstemmed | Change of phase transformation and bond strength of Y-TZP with various hydrofluoric acid etching |
| title_short | Change of phase transformation and bond strength of Y-TZP with various hydrofluoric acid etching |
| title_sort | change of phase transformation and bond strength of y tzp with various hydrofluoric acid etching |
| topic | y-tzp hydrofluoric acid phase transformation thermal cycling bond strength |
| url | http://rde.ac/upload/pdf/rde-46-e54.pdf |
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