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Quintessence Publishing: Journals: ORTHODONTICS
ORTHODONTICS
The Art and Practice of Dentofacial Enhancement

Formerly World Journal of Orthodontics

Edited by
Rafi Romano, DMD, MSc (Editor-in-Chief)

ISSN 2160-2999 (print) / ISSN 2160-3006 (online)

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Publication:
Yearbook 2012
Volume 13 , Issue 1

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Share Abstract:

Evaluation and comparision of the shear bond strength of rebonded orthodontic brackets with air abrasion, flaming, and grinding techniques: An in vitro study

Hemant Kumar Halwai, BDS, MDS/Ranjit Haridas Kamble, BDS, MDS/Pushpa Vinay Hazarey, BDS, MDS/Vanita Gautam, BDS, MDS


Aim: To evaluate and compare in vitro the shear bond strength of rebonded orthodontic brackets among the three most frequently used rebonding methods—sandblasting, direct flaming, and grinding with a green stone bur. The surface characteristics of new and rebonded bracket bases were also compared using scanning electron microscopy (SEM). Methods: The sample used in the present study comprised 60 extracted human premolars bonded with brackets. The sample was divided into three groups (each n = 20; sandblasting, direct flaming, and grinding with a green stone bur). SEM was used to compare the surface characteristics of the new and rebonded bracket bases for all three groups. Results: The Z test for the direct flaming and grinding groups revealed statistically significant bond strength (P < .05). The ANOVA test for all three groups showed P < .05, which is statistically significant. SEM for the sandblasting method showed well-defined retentive areas. Conclusion: When rebonding brackets, sandblasting the bracket base yields the highest bond strength. ORTHODONTICS (CHIC) 2012;13:e1–e9.

Key words: grinding and flaming, rebonding, sand blasting, shear bond strength

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