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Effect of Simplified Bonding on Shear Bond Strength between Ceramic Brackets and Dental Zirconia

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Department of Dental Biomaterials Science, School of Dentistry, Seoul National University, Seoul 03080, Korea
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Department of Conservative Dentistry, Kyung Hee University Dental Hospital (KHUDH), Seoul 02447, Korea
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Department of Dental Biomaterials Science, School of Dentistry and Dental Research Institute, Seoul National University, Seoul 03080, Korea
*
Author to whom correspondence should be addressed.
Materials 2019, 12(10), 1640; https://doi.org/10.3390/ma12101640
Received: 26 April 2019 / Revised: 14 May 2019 / Accepted: 17 May 2019 / Published: 20 May 2019
The aim of this study was to evaluate the long term stability of shear bond strength (SBS) when 10-methacryloyloxydecyl dihydrogen phosphate (10-MDP) containing universal adhesive was used in the ceramic bracket bonding on dental zirconia. Twenty human maxillary incisors were collected. The ceramic bracket was bonded on the buccal enamel surface after the acid-etching and orthodontic primer application (Group CON). Sixty zirconia specimens were sintered, sandblasted and divided into three experimental groups; group CP—ceramic primer followed by an orthodontic primer; group U—universal adhesive; group CU—ceramic primer followed by a universal adhesive. For each specimen, the bracket was bonded onto the treated surface with composite resin (Transbond XT, 3M ESPE). The SBS tested before (CON0, CP0, U0, CU0) and after the artificial aging (CON1, CP1, U1, CU1). The data were statistically analyzed with the Kruskal–Wallis test at a significance level of 0.05. The mean SBS of CON0, CP0, U0 and CU0 were within the clinically acceptable range without significant differences. After the aging process, SBS decreased in all groups. Among the aged groups, CP1 showed the highest SBS. Based on the results, when bonding ceramic brackets to a dental zirconia surface, we can conclude that ceramic primer used with an orthodontic primer, rather than using a universal adhesive, is recommended. View Full-Text
Keywords: dental zirconia; orthodontic bracket; 10-MDP; surface treatment; shear bond strength; resin bonding dental zirconia; orthodontic bracket; 10-MDP; surface treatment; shear bond strength; resin bonding
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Ju, G.-Y.; Oh, S.; Lim, B.-S.; Lee, H.-S.; Chung, S.H. Effect of Simplified Bonding on Shear Bond Strength between Ceramic Brackets and Dental Zirconia. Materials 2019, 12, 1640.

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