Original Article

Effect of Enamel Preparation and Light Curing Methods on Microleakage under Orthodontic Brackets

Abstract

Objectives: This study aimed to compare the microleakage beneath metallic brackets following two different methods of enamel preparation and light curing.

Materials and Methods: A total of 120 bovine deciduous lower incisors were randomly divided into four groups of 30 teeth. The preparations were as follows: Group I: Acid etching + Transbond XT primer + direct illumination, group II: acid etching + Transbond XT primer + transillumination, group III: Transbond XT self-etching primer + direct illumination and Group IV: Transbond XT self-etching primer + transillumination. Dye penetration was used as the method of microleakage evaluation. Sections made at the enamel-adhesive and adhesive-bracket interfaces were evaluated under a stereomicroscope. The Kruskal-Wallis and Mann-Whitney U tests were used for statistical analysis. The level of significance was set at P<0.05.

Results: All groups showed greater microleakage at the gingival in comparison to the incisal margin and the differences were significant among groups with transillumination (P<0.001). No significant differences were observed in the microleakage scores at the gingival and incisal margins in any of the interfaces (P>0.05). Mesiodistal margins of the self-etching group with direct illumination showed significantly lower scores in comparison with acid etched group (P<0.05).

Conclusion: Use of self-etching primers for bonding of orthodontic brackets yields acceptable results if all bracket margins are cured directly.

Files
IssueVol 12, No 6 (2015) QRcode
SectionOriginal Article
Keywords
Orthodontic brackets Self-etch primer Transillumination

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Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
How to Cite
1.
Pakshir H, Ajami S. Effect of Enamel Preparation and Light Curing Methods on Microleakage under Orthodontic Brackets. Front Dent. 2016;12(6):436-446.