Effect of hydrofluoric acid-based etchant at an elevated temperature on the bond strength and surface topography of Y-TZP ceramics
ObjectivesThis study investigated the effects of a hydrofluoric acid (HA; solution of hydrogen fluoride [HF] in water)-based smart etching (SE) solution at an elevated temperature on yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) ceramics in terms of bond strength and morphological change...
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Korean Academy of Conservative Dentistry
2020-02-01
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| Series: | Restorative Dentistry & Endodontics |
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| Online Access: | http://rde.ac/upload/pdf/rde-45-e6.pdf |
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| author | Mi-Kyung Yu Myung-Jin Lim Noo-Ri Na Kwang-Won Lee |
| author_facet | Mi-Kyung Yu Myung-Jin Lim Noo-Ri Na Kwang-Won Lee |
| author_sort | Mi-Kyung Yu |
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| description | ObjectivesThis study investigated the effects of a hydrofluoric acid (HA; solution of hydrogen fluoride [HF] in water)-based smart etching (SE) solution at an elevated temperature on yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) ceramics in terms of bond strength and morphological changes.Materials and MethodsEighty sintered Y-TZP specimens were prepared for shear bond strength (SBS) testing. The bonding surface of the Y-TZP specimens was treated with 37% phosphoric acid etching at 20°C–25°C, 4% HA etching at 20°C–25°C, or HA-based SE at 70°C–80°C. In all groups, zirconia primers were applied to the bonding surface of Y-TZP. For each group, 2 types of resin cement (with or without methacryloyloxydecyl dihydrogen phosphate [MDP]) were used. SBS testing was performed. Topographic changes of the etched Y-TZP surface were analyzed using scanning electron microscopy and atomic force microscopy. The results were analyzed and compared using 2-way analysis of variance.ResultsRegardless of the type of resin cement, the highest bond strength was measured in the SE group, with significant differences compared to the other groups (p < 0.05). In all groups, MDP-containing resin cement yielded significantly higher bond strength values than MDP-free resin cement (p < 0.05). It was also shown that the Y-TZP surface was etched by the SE solution, causing a large change in the surface topography.ConclusionsBond strength significantly improved when a heated HA-based SE solution was applied to the Y-TZP surface, and the etched Y-TZP surface was more irregular and had higher surface roughness. |
| format | Article |
| id | doaj-art-6a0b80c90b1a47ebba2fb200bac4f282 |
| institution | Kabale University |
| issn | 2234-7658 2234-7666 |
| language | English |
| publishDate | 2020-02-01 |
| publisher | Korean Academy of Conservative Dentistry |
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| series | Restorative Dentistry & Endodontics |
| spelling | doaj-art-6a0b80c90b1a47ebba2fb200bac4f2822025-08-20T03:28:52ZengKorean Academy of Conservative DentistryRestorative Dentistry & Endodontics2234-76582234-76662020-02-01451e610.5395/rde.2020.45.e6941Effect of hydrofluoric acid-based etchant at an elevated temperature on the bond strength and surface topography of Y-TZP ceramicsMi-Kyung Yu0Myung-Jin Lim1Noo-Ri Na2Kwang-Won Lee3Department of Conservative Dentistry, School of Dentistry, Chonbuk National University, Jeonju, KoreaDepartment of Conservative Dentistry, School of Dentistry, Chonbuk National University, Jeonju, KoreaDepartment of Conservative Dentistry, School of Dentistry, Chonbuk National University, Jeonju, KoreaDepartment of Conservative Dentistry, School of Dentistry, Chonbuk National University, Jeonju, KoreaObjectivesThis study investigated the effects of a hydrofluoric acid (HA; solution of hydrogen fluoride [HF] in water)-based smart etching (SE) solution at an elevated temperature on yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) ceramics in terms of bond strength and morphological changes.Materials and MethodsEighty sintered Y-TZP specimens were prepared for shear bond strength (SBS) testing. The bonding surface of the Y-TZP specimens was treated with 37% phosphoric acid etching at 20°C–25°C, 4% HA etching at 20°C–25°C, or HA-based SE at 70°C–80°C. In all groups, zirconia primers were applied to the bonding surface of Y-TZP. For each group, 2 types of resin cement (with or without methacryloyloxydecyl dihydrogen phosphate [MDP]) were used. SBS testing was performed. Topographic changes of the etched Y-TZP surface were analyzed using scanning electron microscopy and atomic force microscopy. The results were analyzed and compared using 2-way analysis of variance.ResultsRegardless of the type of resin cement, the highest bond strength was measured in the SE group, with significant differences compared to the other groups (p < 0.05). In all groups, MDP-containing resin cement yielded significantly higher bond strength values than MDP-free resin cement (p < 0.05). It was also shown that the Y-TZP surface was etched by the SE solution, causing a large change in the surface topography.ConclusionsBond strength significantly improved when a heated HA-based SE solution was applied to the Y-TZP surface, and the etched Y-TZP surface was more irregular and had higher surface roughness.http://rde.ac/upload/pdf/rde-45-e6.pdfy-tzpha-based etchanttemperature elevationbond strength |
| spellingShingle | Mi-Kyung Yu Myung-Jin Lim Noo-Ri Na Kwang-Won Lee Effect of hydrofluoric acid-based etchant at an elevated temperature on the bond strength and surface topography of Y-TZP ceramics Restorative Dentistry & Endodontics y-tzp ha-based etchant temperature elevation bond strength |
| title | Effect of hydrofluoric acid-based etchant at an elevated temperature on the bond strength and surface topography of Y-TZP ceramics |
| title_full | Effect of hydrofluoric acid-based etchant at an elevated temperature on the bond strength and surface topography of Y-TZP ceramics |
| title_fullStr | Effect of hydrofluoric acid-based etchant at an elevated temperature on the bond strength and surface topography of Y-TZP ceramics |
| title_full_unstemmed | Effect of hydrofluoric acid-based etchant at an elevated temperature on the bond strength and surface topography of Y-TZP ceramics |
| title_short | Effect of hydrofluoric acid-based etchant at an elevated temperature on the bond strength and surface topography of Y-TZP ceramics |
| title_sort | effect of hydrofluoric acid based etchant at an elevated temperature on the bond strength and surface topography of y tzp ceramics |
| topic | y-tzp ha-based etchant temperature elevation bond strength |
| url | http://rde.ac/upload/pdf/rde-45-e6.pdf |
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