Evaluation of the shear bond strength of ceramic orthodontic brackets to glazed monolithic zirconia using different bonding protocols
Douara, Y., Abdul Kader, S., Kassem, H., Mowafy, M. (2019). Evaluation of the shear bond strength of ceramic orthodontic brackets to glazed monolithic zirconia using different bonding protocols. EKB Journal Management System, 56(December 2019), 9-20. doi: 10.21608/eos.2019.77627
Youmna Douara; Sally Abdul Kader; Hassan Kassem; Mohamed Mowafy. "Evaluation of the shear bond strength of ceramic orthodontic brackets to glazed monolithic zirconia using different bonding protocols". EKB Journal Management System, 56, December 2019, 2019, 9-20. doi: 10.21608/eos.2019.77627
Douara, Y., Abdul Kader, S., Kassem, H., Mowafy, M. (2019). 'Evaluation of the shear bond strength of ceramic orthodontic brackets to glazed monolithic zirconia using different bonding protocols', EKB Journal Management System, 56(December 2019), pp. 9-20. doi: 10.21608/eos.2019.77627
Douara, Y., Abdul Kader, S., Kassem, H., Mowafy, M. Evaluation of the shear bond strength of ceramic orthodontic brackets to glazed monolithic zirconia using different bonding protocols. EKB Journal Management System, 2019; 56(December 2019): 9-20. doi: 10.21608/eos.2019.77627

Evaluation of the shear bond strength of ceramic orthodontic brackets to glazed monolithic zirconia using different bonding protocols

Egyptian Orthodontic Journal
Article 2, Volume 56, December 2019, December 2019, Page 9-20  XML PDF (606.73 K)
Document Type: Original Article
DOI: 10.21608/eos.2019.77627
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Authors
Youmna Douara* 1; Sally Abdul Kader2; Hassan Kassem3; Mohamed Mowafy3
1Deparment of Orthodontics, Faculty of Dentistry, Alexandria University, Egypt
2Department of Dental Biomaterials, Faculty of Dentistry, Alexandria University, Egypt
3Department of Orthodontics, Faculty of Dentistry, Alexandria University, Egypt
Abstract
Abstract
AIM: The aim of this study was to evaluate the shear bond strength (SBS) of ceramic brackets to glazed monolithic zirconia using three different bonding protocols.
MATERIALS AND METHODS: Forty-five monolithic glazed zirconia embedded into acrylic resin were randomly assigned to 3 groups (n = 15) following air abrasion by 50 μm aluminum oxide particles, the groups were treated with: (A) Assure Plus, (B) Silane + Assure Plus (C) Hydrofluoric acid + Silane + Transbond XT primer. Ceramic brackets were bonded to the zirconia discs using Transbond XT. Following thermocycling (500 cycles, 5° - 55° C), SBS, failure mode and Adhesive Remnant Index were assessed.
RESULTS:Group C showed the highest SBS followed by Group B with no statistically significant difference. Most of the specimens in Group C showed an adhesive failure between the bracket base and the adhesive, whereas Group B presented mainly a mixed cohesive adhesive failure. SBS in Group A was significantly lower than either groups showing an adhesive failure at the zirconia- adhesive interface.
CONCLUSIONS: Both Assure Plus + Silane and the classical ceramic bonding protocol achieved clinically acceptable SBS of ceramic brackets bonded to glazed zirconia. However, Assure Plus + Silane achieved better debonding characteristics.
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