J. Orthod.
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British Journal of Orthodontics, Vol 19, 183-189, Copyright © 1992 by British Orthodontic Society

ARTICLES

Shear bond strength of ceramic brackets with chemical or mechanical retention

CM Forsberg and C Hagberg
Department of Orthodontics, Karolinska Institutet, Huddinge, Sweden.

The study was undertaken to measure and compare the shear bond strengths of a ceramic bracket with chemical retention, a ceramic bracket with a new type of textured base providing mechanical retention, and a metal bracket with foil-mesh base. The tests were performed on 51 extracted human premolars which were randomly divided into three equally large groups (n = 17)--one group for each type of bracket. After debonding, the site of failure was noted and the enamel surface inspected with scanning electron microscopy. The ceramic bracket with chemical retention exhibited significantly higher bond strength than the corresponding bracket with textured base. In comparison with the metal bracket significantly higher bond strengths were recorded for both types of ceramic brackets. The ceramic bracket with mechanical retention and the metal bracket were comparable as regards the site of bond failure. In some cases the chemical bond provided very high values of bond strength. Enamel failure were recorded in three teeth which had been bonded with this type of ceramic bracket.


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A. Faltermeier, M. Rosentritt, C. Reicheneder, and M. Behr
Discolouration of orthodontic adhesives caused by food dyes and ultraviolet light
Eur J Orthod, February 1, 2008; 30(1): 89 - 93.
[Abstract] [Full Text] [PDF]


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Copyright © 1992 British Orthodontic Society.