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Rebonding of Orthodontic Brackets.

Authors :
Montasser, Mona A.
Drummond, James L.
Roth, John R.
Al-Turki, Lulwa
Evans, Carla A.
Source :
Angle Orthodontist; May2008, Vol. 78 Issue 3, p537-544, 8p, 5 Diagrams, 4 Charts
Publication Year :
2008

Abstract

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. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00033219
Volume :
78
Issue :
3
Database :
Supplemental Index
Journal :
Angle Orthodontist
Publication Type :
Academic Journal
Accession number :
43929419
Full Text :
https://doi.org/10.2319/022707-102.1