Morsy, S., Moustafa, E., Elsharkawy, M. (2020). MICRO SHEAR BOND STRENGTH OF UNIVERSAL DENTAL ADHESIVES TO DENTIN USING DIFFERENT ETCHING MODES (IN VITRO STUDY). test, 45(2), 84-90. doi: 10.21608/adjalexu.2020.88443
Samaa M. Morsy; El Sayed Moustafa; Mahmoud Elsharkawy. "MICRO SHEAR BOND STRENGTH OF UNIVERSAL DENTAL ADHESIVES TO DENTIN USING DIFFERENT ETCHING MODES (IN VITRO STUDY)". test, 45, 2, 2020, 84-90. doi: 10.21608/adjalexu.2020.88443
Morsy, S., Moustafa, E., Elsharkawy, M. (2020). 'MICRO SHEAR BOND STRENGTH OF UNIVERSAL DENTAL ADHESIVES TO DENTIN USING DIFFERENT ETCHING MODES (IN VITRO STUDY)', test, 45(2), pp. 84-90. doi: 10.21608/adjalexu.2020.88443
Morsy, S., Moustafa, E., Elsharkawy, M. MICRO SHEAR BOND STRENGTH OF UNIVERSAL DENTAL ADHESIVES TO DENTIN USING DIFFERENT ETCHING MODES (IN VITRO STUDY). test, 2020; 45(2): 84-90. doi: 10.21608/adjalexu.2020.88443

MICRO SHEAR BOND STRENGTH OF UNIVERSAL DENTAL ADHESIVES TO DENTIN USING DIFFERENT ETCHING MODES (IN VITRO STUDY)

Alexandria Dental Journal
Article 14, Volume 45, Issue 2, August 2020, Pages 84-90    PDF (388.78 K)
Document Type: Original Article
DOI: 10.21608/adjalexu.2020.88443
Authors
Samaa M. Morsy* 1; El Sayed Moustafa2; Mahmoud Elsharkawy2
1Bachelor of Dentistry, Faculty of Dentistry, Alexandria University, Egypt.
2Professor of Conservative Dentistry, Faculty of Dentistry, Alexandria University, Egypt.
Abstract
Introduction:Patient demand for tooth colored restorations have made composites an important part of the restorative process. An important factor affecting the intraoral performance of composite restorations is bonding. Therefore, a strong bond at the tooth-restoration interface is necessary for long-term success of a composite restoration.
Objectives: To compare the micro shear bond strength of a resin composite (Filtek Z250) to dentin using three universal adhesives in self-etching and total-etching modes and perform fractographic analysis using scanning electron microscope.
Materials and methods:60 dentin specimens were used in this study. They were divided into two main groups (self-etch mode & total-etch mode). Each group was subdivided into three subgroups according to the bonding agent used (Tetric N bond universal, All bond universal and Single bond universal). Bonding of adhesives and composite buildups were done according to manufacturer’s instructions. All specimens were thermocycled for 500 cycles from 5 to 55°C. The micro shear bond strength was measured using universal testing machine. Specimens were further sectioned, gold sputtered and evaluated fractographically using scanning electron microscope (SEM). Data obtained were analyzed using F-test (ANOVA), two-way ANOVA and Spearman’s correlation tests.
Results: In self-etch mode, the micro shear bond strength of the three tested adhesives didn’t show a significant difference. Meanwhile, etching significantly improved the micro shear bond strength of Single bond universal, while Tetric N bond universal and All bond universal showed no significant difference.
Conclusions: An etching step prior to the application of the universal adhesives didn’t significantly affect their micro shear bond strength, except for Single bond universal.
Keywords
Adhesives; dentin; bonding agents; etch mode; micro shear bond strength; fractographic analysis
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