J. Orthod.
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British Journal of Orthodontics, Vol 15, 247-253, Copyright © 1988 by British Orthodontic Society

ARTICLES

An in vitro study of the bond strength of a glass ionomer cement in the direct bonding of orthodontic brackets

PA Cook and CC Youngson
Department of Child Dental Health, Dental School, University of Leeds.

The shear/peel bond strength of a 'no-mix' composite orthodontic bonding resin was compared in vitro with that of a glass ionomer cement. The effect of pre-treatment of the enamel, with either phosphoric acid or polyacrylic acid, prior to using the glass ionomer cement was also assessed. The composite resin had a significantly higher bond strength than the glass ionomer cement. Simple prophylaxis and drying of the enamel achieved the best results when using the glass ionomer cement, whilst etching the tooth surface with phosphoric acid produced a significantly poorer bond to the enamel. Investigation of the site of failure showed the composite resin bonded very well to the tooth and less well to the bracket, whilst the glass ionomer adhered significantly better to the bracket base than to the tooth surface.


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S. A. Clark, P. H. Gordon, and J. F. McCabe
An ex vivo investigation to compare orthodontic bonding using a 4-META-based adhesive or a composite adhesive to acid-etched and sandblasted enamel
J. Orthod., March 1, 2003; 30(1): 51 - 58.
[Abstract] [Full Text] [PDF]


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Copyright © 1988 British Orthodontic Society.