Effect of surface treatments on repair strength, roughness and morphology in aged metal-free crowns
Aim: The roughness and micromorphology of various surface treatments in aged metal-free crowns and the bond strength of these crowns repaired with composite resin (CR) was evaluated in vitro. Methods: A CR core build-up was confectioned in 60 premolars and prepared for metal-free crowns. Prepared te...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Universidade Estadual de Campinas
2020-05-01
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| Series: | Brazilian Journal of Oral Sciences |
| Subjects: | |
| Online Access: | https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8656155 |
| _version_ | 1831647776894615552 |
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| author | Yançanã Luizy Gruber Bakaus Thaís Emanuelle Bruna Fortes Bittencourt João Carlos Gomes Alessandra Reis Giovana Mongruel Gomes |
| author_facet | Yançanã Luizy Gruber Bakaus Thaís Emanuelle Bruna Fortes Bittencourt João Carlos Gomes Alessandra Reis Giovana Mongruel Gomes |
| author_sort | Yançanã Luizy Gruber |
| collection | DOAJ |
| description | Aim: The roughness and micromorphology of various surface treatments in aged metal-free crowns and the bond strength of these crowns repaired with composite resin (CR) was evaluated in vitro. Methods: A CR core build-up was confectioned in 60 premolars and prepared for metal-free crowns. Prepared teeth were molded with the addition of silicone, and the laboratory ceromer/fiber-reinforced crowns (SR Adoro/Fibrex Lab) were fabricated. Subsequently, the crowns were cemented and artificially aged in a mechanical fatigue device (1.2 X 106 cycles), then divided into 4 groups (n = 15) according to the surface treatment: 1) phosphoric acid etching (PA); 2) PA + silane application; 3) roughening with a diamond bur + PA; and 4) sandblasting with Al2O3 + PA. After the treatments, the crowns (n = 2) were qualitatively analyzed by scanning electron microscope (SEM) and surface roughness (n = 5) was analyzed before and after the surface treatment (Ra parameter). The remaining crowns (n = 8) received standard repair with an adhesive system (Tetric N-Bond) and a nanohybrid CR (Tetric N-Ceram), and the microshear bond strength (SBS) test was performed (0.5 mm/min). Roughness and SBS data were analyzed by one- and two-way ANOVA, respectively, as well as Tukey’s post-test (α = 0.05). Results: Sandblasting with Al2O3 + PA resulted in the highest final roughness and SBS values. The lowest results were observed in the PA group, whereas the silane and diamond bur groups showed intermediate values. Conclusion: It may be concluded that indirect ceromer crowns sandblasted with aluminum oxide prior to PA etching promote increased roughness surface and bond strength values. |
| first_indexed | 2024-12-19T14:19:40Z |
| format | Article |
| id | doaj.art-f141d236744246158b24017f615a8ec3 |
| institution | Directory Open Access Journal |
| issn | 1677-3225 |
| language | English |
| last_indexed | 2024-12-19T14:19:40Z |
| publishDate | 2020-05-01 |
| publisher | Universidade Estadual de Campinas |
| record_format | Article |
| series | Brazilian Journal of Oral Sciences |
| spelling | doaj.art-f141d236744246158b24017f615a8ec32022-12-21T20:17:49ZengUniversidade Estadual de CampinasBrazilian Journal of Oral Sciences1677-32252020-05-011910.20396/bjos.v19i0.8656155Effect of surface treatments on repair strength, roughness and morphology in aged metal-free crownsYançanã Luizy Gruber0Bakaus Thaís Emanuelle1Bruna Fortes Bittencourt2João Carlos Gomes3Alessandra Reis4Giovana Mongruel Gomes5State University of Ponta GrossaState University of Ponta GrossaState University of Ponta GrossaState University of Ponta GrossaState University of Ponta GrossaState University of Ponta GrossaAim: The roughness and micromorphology of various surface treatments in aged metal-free crowns and the bond strength of these crowns repaired with composite resin (CR) was evaluated in vitro. Methods: A CR core build-up was confectioned in 60 premolars and prepared for metal-free crowns. Prepared teeth were molded with the addition of silicone, and the laboratory ceromer/fiber-reinforced crowns (SR Adoro/Fibrex Lab) were fabricated. Subsequently, the crowns were cemented and artificially aged in a mechanical fatigue device (1.2 X 106 cycles), then divided into 4 groups (n = 15) according to the surface treatment: 1) phosphoric acid etching (PA); 2) PA + silane application; 3) roughening with a diamond bur + PA; and 4) sandblasting with Al2O3 + PA. After the treatments, the crowns (n = 2) were qualitatively analyzed by scanning electron microscope (SEM) and surface roughness (n = 5) was analyzed before and after the surface treatment (Ra parameter). The remaining crowns (n = 8) received standard repair with an adhesive system (Tetric N-Bond) and a nanohybrid CR (Tetric N-Ceram), and the microshear bond strength (SBS) test was performed (0.5 mm/min). Roughness and SBS data were analyzed by one- and two-way ANOVA, respectively, as well as Tukey’s post-test (α = 0.05). Results: Sandblasting with Al2O3 + PA resulted in the highest final roughness and SBS values. The lowest results were observed in the PA group, whereas the silane and diamond bur groups showed intermediate values. Conclusion: It may be concluded that indirect ceromer crowns sandblasted with aluminum oxide prior to PA etching promote increased roughness surface and bond strength values.https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8656155CeramicsComposite resinsElectron microscope tomographyShear strengthSurface properties |
| spellingShingle | Yançanã Luizy Gruber Bakaus Thaís Emanuelle Bruna Fortes Bittencourt João Carlos Gomes Alessandra Reis Giovana Mongruel Gomes Effect of surface treatments on repair strength, roughness and morphology in aged metal-free crowns Brazilian Journal of Oral Sciences Ceramics Composite resins Electron microscope tomography Shear strength Surface properties |
| title | Effect of surface treatments on repair strength, roughness and morphology in aged metal-free crowns |
| title_full | Effect of surface treatments on repair strength, roughness and morphology in aged metal-free crowns |
| title_fullStr | Effect of surface treatments on repair strength, roughness and morphology in aged metal-free crowns |
| title_full_unstemmed | Effect of surface treatments on repair strength, roughness and morphology in aged metal-free crowns |
| title_short | Effect of surface treatments on repair strength, roughness and morphology in aged metal-free crowns |
| title_sort | effect of surface treatments on repair strength roughness and morphology in aged metal free crowns |
| topic | Ceramics Composite resins Electron microscope tomography Shear strength Surface properties |
| url | https://periodicos.sbu.unicamp.br/ojs/index.php/bjos/article/view/8656155 |
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