Impact of bracket displacement or rotation during bonding and time of removal of excess adhesive on the bracket–enamel bond strength
| Autor: | Luana S Bublitz, A.S. Oliveira, Caroline Barwaldt, Rafael R. Moraes |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Dental Stress Analysis
Materials science Rotation Orthodontic Brackets Surface Properties Movement Dental Cements Dentistry Orthodontics Quantitative Biology::Cell Behavior Random Allocation Mathematics::Quantum Algebra Materials Testing Shear strength Animals Displacement (orthopedic surgery) Composite material Dental Enamel Cementation Mathematics::Symplectic Geometry Light-Curing of Dental Adhesives Fixation (histology) Enamel paint Bond strength business.industry Bracket Dental Bonding Adhesiveness Stainless Steel Resin Cements visual_art visual_art.visual_art_medium Cattle Stress Mechanical Adhesive Direct shear test Shear Strength business Dental Alloys |
| Zdroj: | Journal of Orthodontics. 41:124-127 |
| ISSN: | 1465-3133 1465-3125 |
| DOI: | 10.1179/1465313313y.0000000087 |
| Popis: | This study investigated the the influence of bracket displacement or rotation during fixation and the time of excess adhesive removal from around the bracket on bond strength to enamel.Stainless steel brackets were bonded to the buccal faces of bovine incisors using Transbond XT® adhesive resin. The teeth were divided into five groups (n = 20). In the control group, no displacement or rotation of the bracket was carried out. In the Displac-A group, excess adhesive was removed after the bracket was displaced 2 mm incisally. In the B-Displac group, excess adhesive was removed before the bracket was displaced incisally. In the Rotat-A group, excess adhesive was removed after the bracket was rotated 45°. In the B-Rotat group, excess adhesive was removed before the bracket was rotated. Photoactivation was carried out on the lateral sides of the bracket. A shear test was conducted 10 min after fixation using a knife-edged chisel. Bond strength data were analysed using ANOVA and Fisher's test (5%). The adhesive remnant index (ARI) was scored under magnification. ARI data were analysed using the Kruskal-Wallis test (5%).No significant differences were detected among the Control, Displac-A, Rotat-A and B-Rotat groups. The B-Displac group showed lower bond strength than all of the other groups, except Displac-A. No significant differences were observed in ARI scores across groups.Displacements of the brackets during fixation did not seem to affect the enamel bond strength when excess adhesive is removed after the final positioning of the bracket. |
| Databáze: | OpenAIRE |
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