Effects of different silanes and acid concentrations on bond strength of brackets to porcelain surfaces
| Autor: | Ender Kazazoglu, Göksu Trakyali, Tülin Arun, Özlem Malkondu |
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| Přispěvatelé: | Trakyali, G., Malkondu, O., Kazazoglu, E., Arun, T., Yeditepe Üniversitesi |
| Rok vydání: | 2009 |
| Předmět: |
Dental Stress Analysis
Materials science Orthodontic Brackets Potassium Compounds Surface Properties Acrylic Resins Orthodontics Dental bonding Composite Resins Hydrofluoric Acid chemistry.chemical_compound Dental porcelain Acid Etching Dental Materials Testing Shear strength Aluminum Oxide Humans Composite material Acrylic resin Silanes Bond strength Dental Bonding Adhesiveness Silane Dental Porcelain Resin Cements chemistry visual_art Dental Etching visual_art.visual_art_medium Aluminum Silicates Adhesive Stress Mechanical Shear Strength Gels |
| Zdroj: | European journal of orthodontics. 31(4) |
| ISSN: | 1460-2210 |
| Popis: | The aim of this study was to determine the optimum silane-coupling agent and the optimum concentration of acid agent when bonding to porcelain surfaces. Eighty deglazed feldspathic porcelain discs with a diameter of 10 mm and a thickness of 2 mm mounted in acrylic resin blocks were randomly divided into four groups. In groups 1 and 2, the porcelain surfaces were etched with 9.6 per cent hydrofluoric (HF) acid and in groups 3 and 4 with 5 per cent HF acid. In groups 1 and 3, the Dynalock maxillary central incisor brackets were bonded with Pulpdent silane and Unite bonding adhesive and in groups 2 and 4 with Reliance silane and Unite. Shear forces were applied to the samples using an Instron universal test machine. The non-parametric Kruskal-Wallis test was used to determine significant differences in bond strengths between the four groups and Dunn's multiple comparison test to compare subgroups. The mean bond strengths and standard deviations of groups 1 to 4 were 5.51 +/- 1.19, 6.54 +/- 0.002, 4.55 +/- 1.93, and 6.39 +/- 0.45 MPa, respectively. Specimens bonded with Reliance showed a statistically significantly higher in vitro bond strength than those bonded with Pulpdent. The concentration of etching gels did not result in any statistically significant difference on the in vitro bond strength when evaluated separately. |
| Databáze: | OpenAIRE |
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