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The aim of the present study is to evaluate the micro-tensile bond strength to dentin, failure mode, and fluoride release of GDMA-base bonding agent vs HEMA-based universal adhesive after aging. A total of 50 freshly extracted caries-free human molars will be used in this study. The specimens will be divided into 2 groups according to the used adhesive. Group (A1) refers to the intervention group using GDMA based universal adhesive, while Group (A2) refers to control group using conventional HEMA-universal adhesive. The specimens of all groups will be subjected to 10,000 thermo-cycles as an aging period. For micro-tensile bond strength test, the beams will be mounted onto the universal testing machine and tensile load was applied, until bonding failure of the specimen occurred.After μ-TBS testing, failure mode will be analyzed. Elemental analysis of resin-dentin interface will be assessed using energy dispersive x-ray (EDX) analysis
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Aya Ibrahim tarek (2024) studied this question.
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