Effect of argon laser curing on the shear bond strength of metal brackets bonded with light-cured glass ionomer cement

Introduction: The purpose of this study was to evaluate the shear bond strength and debonding characteristics of glass ionomer cement cured with an argon laser. Methods: Thirty extracted first premolars were divided into 2 groups of 15. The teeth were cleaned and mounted in resin, and metal brackets...

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Published in:American journal of orthodontics and dentofacial orthopedics 2005-12, Vol.128 (6), p.740-743
Main Authors: Serra, Glaucio, Brugnera, Aldo, Elias, Carlos Nelson, Bolognese, Ana Maria
Format: Article
Language:English
Subjects:
Adhesiveness
Argon
Bicuspid
Dental Bonding
Dental Debonding
Dental Equipment
Dental Stress Analysis
Dentistry
Glass Ionomer Cements - radiation effects
Humans
Lasers
Light
Materials Testing
Orthodontic Brackets
Shear Strength
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Summary:Introduction: The purpose of this study was to evaluate the shear bond strength and debonding characteristics of glass ionomer cement cured with an argon laser. Methods: Thirty extracted first premolars were divided into 2 groups of 15. The teeth were cleaned and mounted in resin, and metal brackets were bonded with glass ionomer cement. In the control group, the bond was cured with a halogen light for 40 seconds (20 seconds mesial and 20 seconds distal). In the test group, the specimens were cured with an argon laser for 5 seconds. Brackets were debonded in shear; bond strength was measured, and the adhesive remnant index was scored. Results: The difference in mean shear bond strength was not statistically significant between groups when compared with a t test. More adhesive remained on the enamel surface in the laser group than in the control group. Conclusions: Argon laser curing produces bond strengths equivalent to those obtained with traditional light curing in much less time, but it leaves more adhesive on the tooth surface.
ISSN:0889-5406
1097-6752
DOI:10.1016/j.ajodo.2004.08.021