Effect of two-step and one-step surface conditioning of glass ceramic on adhesion strength of orthodontic bracket and effect of thermo-cycling on adhesion strength
| Autor: | Ravikumar Ramakrishnaiah, Samer M. Alaqeel, Ibrahim Alshahrani, Moshabab A Asiry, Bangalore H. Durgesh |
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| Rok vydání: | 2018 |
| Předmět: |
Ceramics
Materials science Orthodontic Brackets Surface Properties Biomedical Engineering 02 engineering and technology law.invention Biomaterials 03 medical and health sciences 0302 clinical medicine Buccal Surface law Surface roughness Ceramic Composite material Mechanical Phenomena Glass-ceramic Bond strength Temperature Adhesiveness 030206 dentistry Adhesion 021001 nanoscience & nanotechnology Mechanics of Materials visual_art visual_art.visual_art_medium Profilometer Adhesive 0210 nano-technology |
| Zdroj: | Journal of the Mechanical Behavior of Biomedical Materials. 84:22-27 |
| ISSN: | 1751-6161 |
| Popis: | Purpose The adhesion strength of orthodontic brackets bonded to dental glass ceramics was evaluated after ceramic surface was treated with two-step and one-step surface conditioning systems, and subjecting to thermo-cycling. Materials and method A total of forty specimens were fabricated from silica based glass ceramic (lithium disilicate) by duplicating the buccal surface of maxillary first premolar. The specimens were randomly assigned to two experimental groups (n = 20), group one specimens were treated with two-step surface conditioning system (IPS ceramic etching gel™ and Monobond plus™) and group two specimens were treated with one-step surface conditioning system (Monobond etch and prime™). The surface roughness of the specimens after treatment with two-step and one-step surface conditioning system was measured using non-contact surface profilometer. Ten randomly selected specimens from each group were subjected to thermo-cycling and the remaining ten served as baseline. The shear bond strength of the specimens was measured using universal material testing machine. The adhesive remnant index score was calculated, and the results of surface roughness and bond strength were tabulated and subjected to analysis of variance and post hoc tukey's test at a significance level of p Results The results of the study showed that the specimens treated with two-step conditioning system had higher surface roughness and bond strength than one-step conditioning system. The majority of the specimens treated with both two-step and one-step conditioned specimens showed adhesive failure after subjecting thermo-cycling. Conclusions Traditional two-step conditioning provides better bond strength. The clinical importance of the study is that, the silane promoted adhesion significantly reduces on exposure to thermo-cycling. |
| Databáze: | OpenAIRE |
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