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Brazilian Journal of Oral Sciences
Piracicaba Dental School - UNICAMP
EISSN:
Vol. 13, No. 4, 2014, pp. 270-275
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Bioline Code: os14051
Full paper language: English
Document type: Research Article
Document available free of charge
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Brazilian Journal of Oral Sciences, Vol. 13, No. 4, 2014, pp. 270-275
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Effect of different enamel conditionings on the bond strength of glass ionomer cement and ceramic brackets
Oliveira, Dauro Douglas; Bradley, Thomas Gerard; Pithon, Matheus Melo; Pantuzo, Mariele Cristina Garcia; Akaki, Emílio & Dhuru, Virendra
Abstract
Aim: To evaluate the effect of different enamel conditionings on the shear bond strength (SBS)
and bond failure patterns of a resin modified glass ionomer cement (RMGIC) used to bond
ceramic brackets. Methods: 105 human premolars extracted for orthodontic reasons were
divided into 7 groups according to the enamel surface treatments: conditioners (35% phosphoric
acid and 10% polyacrylic acid), type of adhesive (Transbond® and Fuji Ortho LC Capsule®),
washing time and drying of the surface. Results: A significant p<0.05 was observed among the
shear bond strength values obtained with seven different types of enamel preparation prior to
bonding. The group that had the tooth surface conditioned with polyacrylic acid and enamel
surface slightly dried before bracket placement showed no significant difference (p>0.05) to the
group that had brackets bonded with composite resin. The two groups that had enamel prepared
with polyacrylic acid and brackets bonded with GIC on a wet surface showed significantly lower
shear bond strength than the control group (p<0.05). Conclusions: Moisture contamination
decreased SBS, but not enough to preclude the use of RMGIC as an alternative to composite
resin (CR) for direct bonding of ceramic brackets.
Keywords
glass ionomer cements; shear strength; dental bonding; orthodontic brackets
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