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VOLUME 14 , ISSUE 6 ( November-December, 2013 ) > List of Articles

RESEARCH ARTICLE

Effect of a Metal Primer on the Adhesive Interface between Composite and Lingual Brackets

Julio Pedra e Cal Neto, José de Albuquerque Calasans-Maia, Natalia Valli de Almeida, Helen Rohen, Maria Angélica Galvão Freire

Citation Information : Neto JP, de Albuquerque Calasans-Maia J, de Almeida NV, Rohen H, Freire MA. Effect of a Metal Primer on the Adhesive Interface between Composite and Lingual Brackets. J Contemp Dent Pract 2013; 14 (6):1106-1108.

DOI: 10.5005/jp-journals-10024-1459

Published Online: 01-12-2013

Copyright Statement:  Copyright © 2013; Jaypee Brothers Medical Publishers (P) Ltd.


Abstract

Aim

To test the null hypothesis was that there is no difference in the shear strength of indirectly bonded lingual brackets with or without prior application of metal primer on their bases.

Materials and methods

Forty recently extracted human premolars were obtained and randomly divided into two groups of 20 each: group I (control), phosphoric acid and indirect bonding with Maximum Cure (Reliance Orthodontic Products, Itasca, IL, USA); and group II, application of metal primer (Metal Primer, Reliance Orthodontic Products) on bracket base prior to conditioning and indirect bonding. All products were used according to the manufacturer's instructions. A universal testing machine was used to apply a shear force directly onto the enamel- bracket interface at a speed of 1.0 mm/min.

Results

Mean (SD) shear bond strength for group I was 12.87 (5.75) MPa and for the group II was 18.47 (8.48) MPa. The Student's t-test showed a significant difference (p = 0.0311) between the groups. The chi-square test for the adhesive remnant index (ARI) indicated that there was a significant difference (p = 0.2750).

Conclusion

The application of metal primer increased the adhesion of lingual brackets, and may be a promising procedure for clinical orthodontics.

How to cite this article

e Cal Neto JP, de Albuquerque Calasans-Maia J, de Almeida NV, Rohen H, Freire MAG. Effect of a Metal Primer on the Adhesive Interface Between Composite and Lingual Brackets. J Contemp Dent Pract 2013;14(6):1106- 1108.


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