Rebonding of Orthodontic Brackets
| Autor: | Carla A. Evans, John R. Roth, Mona A. Montasser, James L. Drummond, Lulwa I. Al-Turki |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Materials science
Enamel paint Scanning electron microscope Bracket technology industry and agriculture Orthodontics Dental bonding stomatognathic diseases chemistry.chemical_compound stomatognathic system chemistry X-ray photoelectron spectroscopy Dental cement visual_art visual_art.visual_art_medium Adhesive Composite material Phosphoric acid |
| Zdroj: | The Angle Orthodontist. 78:537-544 |
| ISSN: | 1945-7103 0003-3219 |
| DOI: | 10.2319/022707-102.1 |
| Popis: | Objective: The hypothesis of this two-part study is that adhesive systems for bonding orthodontic brackets (ie, two self-etch primers [Transbond and M-Bond] and a conventional phosphoric acid etch [Rely-a-Bond]) would show a difference with respect to rebonded enamel surface morphology and chemical composition. Materials and Methods: This study examined the enamel surface before and after debonding with scanning electron microscopy and the enamel surface chemical composition for the elements Ca, P, O, F, Si, and C using x-ray photoelectron spectroscopy. Results: The etching of the two self-etch groups is less aggressive and less uniform than that of phosphoric acid. The change in the concentration of C indicated that the separation of the bracket from the enamel surface is at the resin-enamel interface for the phosphoric acid–etched adhesive and a mixed mode involving the enamel-resin-bracket interfaces for the self-etching systems. F release appears to occur for Transbond but not for M-Bond. Conclusions: The results confirm the original hypothesis that differences in adhesive systems are manifested in less aggressive etches and less adhesive left on the enamel surface for the self-etching adhesive systems. |
| Databáze: | OpenAIRE |
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