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Alexandria Dental Journal
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Volume Volume 48 (2023)
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El-Ramly, M., Mowafy, M., Abdel-Haffiez, S. (2023). SHEAR BOND STRENGTH AND MODE OF FAILURE OF CERAMIC BRACKETS TO GLAZED FELDSPATHIC PORCELAIN USING DIFFERENT BONDING PROTOCOLS (IN VITRO STUDY). Alexandria Dental Journal, 48(2), 188-195. doi: 10.21608/adjalexu.2022.142358.1284
Mohamed El-Ramly; Mohamed Ibrahim Mowafy; Sherief Hussein Abdel-Haffiez. "SHEAR BOND STRENGTH AND MODE OF FAILURE OF CERAMIC BRACKETS TO GLAZED FELDSPATHIC PORCELAIN USING DIFFERENT BONDING PROTOCOLS (IN VITRO STUDY)". Alexandria Dental Journal, 48, 2, 2023, 188-195. doi: 10.21608/adjalexu.2022.142358.1284
El-Ramly, M., Mowafy, M., Abdel-Haffiez, S. (2023). 'SHEAR BOND STRENGTH AND MODE OF FAILURE OF CERAMIC BRACKETS TO GLAZED FELDSPATHIC PORCELAIN USING DIFFERENT BONDING PROTOCOLS (IN VITRO STUDY)', Alexandria Dental Journal, 48(2), pp. 188-195. doi: 10.21608/adjalexu.2022.142358.1284
El-Ramly, M., Mowafy, M., Abdel-Haffiez, S. SHEAR BOND STRENGTH AND MODE OF FAILURE OF CERAMIC BRACKETS TO GLAZED FELDSPATHIC PORCELAIN USING DIFFERENT BONDING PROTOCOLS (IN VITRO STUDY). Alexandria Dental Journal, 2023; 48(2): 188-195. doi: 10.21608/adjalexu.2022.142358.1284

SHEAR BOND STRENGTH AND MODE OF FAILURE OF CERAMIC BRACKETS TO GLAZED FELDSPATHIC PORCELAIN USING DIFFERENT BONDING PROTOCOLS (IN VITRO STUDY)

Article 1, Volume 48, Issue 2, July 2023, Page 188-195  XML PDF (396.48 K)
Document Type: Original Article
DOI: 10.21608/adjalexu.2022.142358.1284
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Authors
Mohamed El-Ramly email ; Mohamed Ibrahim Mowafy; Sherief Hussein Abdel-Haffiez
Department of Orthodontics, Faculty of Dentistry, Alexandria University, Egypt.
Abstract
ABSTRACT
Objective: To evaluate the shear bond strength (SBS) of ceramic brackets bonded to feldspathic porcelain using different bonding protocols.
Material and Methods: 30 porcelain fused to metal (PFM) disks were fabricated and randomly divided into three equal groups of 10 each. Each group had a different surface treatment as follows:- Group A: air abrasion, etching with hydrofluoric acid (HF), silane and Reliance Assure Plus (RA plus). Group B: air abrasion, silane and RA Plus (manufacturer's recommendation). Group C: air abrasion and RA Plus. Ceramic brackets were bonded to PFM discs using light cure-composite resin. Following thermocycling, SBS was measured using a universal testing machine. After bracket debonding, Failure mode was measured under stereomicroscope.
Results: Group A and group B showed the highest SBS value with a mean of 8.86 ± 1.99 and 10.32 ± 4.39 MPa respectively with no statistically significant difference among them. However, group C showed statistically significant lower SBS with a mean value of 1.84 ± 0.74 Mpa. Failure modes of groups A and B were predominantly at the adhesive / bracket interface. Meanwhile, group C showed mixed adhesive / porcelain interface and cohesive resin failure.
Conclusion: Air abrasion and silane resulted in clinically acceptable bond strength among the groups regardless the use of HF. Silane appears to be integral in achieving adequate bond strength. The universal primer used in the current study can not be used as a substitute to silane.
Keywords
Feldspathic porcelain; Ceramic Brackets; Shear Bond Strength; Reliance Assure Plus
Main Subjects
Orthodontics
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