Bond strengths of all-ceramics: Acid vs laser etching
| Autor: | Bilge Hakan Şen, Mehmet Ali Güngör, Mine Dündar, Birgül Özpinar, Bülent Gökçe, Erhan Çömlekoğlu |
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| Přispěvatelé: | Ege Üniversitesi |
| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: |
Materials science
Surface Properties Analytical chemistry Dentistry Dental bonding Hydrofluoric Acid law.invention chemistry.chemical_compound Hydrofluoric acid Dental porcelain Acid Etching Dental law Etching (microfabrication) Lithia Materials Testing Humans Yttrium Dental Etching General Dentistry Bond strength business.industry Lasers Dental Bonding Laser Dental Porcelain Resin Cements chemistry Lithium Compounds Microscopy Electron Scanning Aluminum Silicates Stress Mechanical business Shear Strength Erbium |
| Zdroj: | Europe PubMed Central |
| ISSN: | 1742-7827 |
| Popis: | WOS: 000245127500012 PubMed ID: 17427827 Various applications of dental lasers on dental materials have been proposed for surface modifications. This study evaluated whether laser etching could be an alternative to hydrofluoric acid (HF) etching. One hundred and ten lithia-based all-ceramic specimens (Empress 2) (R: 4 mm, h: 4 mm) were prepared and divided into five groups (n=22/group). The untreated specimens served as the control, while one of the experimental groups was treated with 9.5% HF for 30 seconds. Three remaining test groups were treated with different laser (Er:YAG laser wavelength:2940 nm, OpusDent) power settings: 300 mJ, 600 mJ and 900 mJ. Ten specimens in each group were luted to the other 10 specimens by a dual-curing cement (Variolink II), and shear-bond strength (SBS) tests were performed (Autograph, crosshead speed: 0.5 mnL/minute). The results were statistically analyzed (Kruskal Wallis and Mann Whitney-U, alpha=.05). Mean SBS (MPa) were 31.9 +/- 4.0, 41.4 +/- 4.3, 42.8 +/- 6.2, 29.2 +/- 4.5 and 27.4 +/- 3.8 for the control and HF, 300, 600 and 900 mJ groups, respectively. SEM evaluations revealed different surface morphologies depending on the laser parameters. The differences between HF acid and 300 mJ, when compared with the control, 600 and 900 mJ groups, were significant (p < 05). The 300 mJ laser group exhibited the highest shear-bond strength values, indicating that laser etching could also be used for surface treatments. |
| Databáze: | OpenAIRE |
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