Evaluation of micro tensile bond strength of newly introduced universal adhesives using different bonding strategies and lining technique on human dentin: In-vitro study
Ain shams university faculty of Dentistry operative department
10.21608/asdj.2025.337176.1647
Abstract
Aim: This study evaluated the immediate and aged micro-tensile bond strength (µTBS) of two universal adhesives: OptiBond eXTRa™ (Kerr) and BeautiBond Xtream™ (Shofu). It also investigated the impact of applying a flowable composite over the adhesive before placing the composite resin restoration, and analyzed fracture modes and the resin/dentin interface via SEM. Materials and methods: Eighty human molars were randomly assigned to eight groups based on adhesive type, bonding strategy (Etch-and-Rinse [E&R] vs. Self-Etch [SE]), whether a flowable composite was used, and aging periods (24 hours and 6 months). The bonding procedures involved specific etching, adhesive application, and curing protocols, followed by micro-tensile testing at a rate of 1 mm/min. Results: Indicated significant interactions between the adhesive type and bonding strategy, as well as between bonding strategy and aging time. After 24 hours, no significant difference in µTBS was observed between E&R and SE. However, the application of a flowable composite significantly enhanced bond strength in the Kerr adhesive compared to Shofu. Notably, bond strength diminished significantly after six months. Conclusion: the two-step universal adhesive demonstrated superior bond strength and durability due to better hybrid layer formation, while the E&R strategy proved more effective than SE. Incorporating a flowable composite lining enhanced bonding effectiveness for both adhesive types, regardless of the bonding mode employed.
Ali Saleh, S. (2025). Evaluation of micro tensile bond strength of newly introduced universal adhesives using different bonding strategies and lining technique on human dentin: In-vitro study. Ain Shams Dental Journal, 37(1), 396-408. doi: 10.21608/asdj.2025.337176.1647
MLA
somaya Ali Saleh. "Evaluation of micro tensile bond strength of newly introduced universal adhesives using different bonding strategies and lining technique on human dentin: In-vitro study", Ain Shams Dental Journal, 37, 1, 2025, 396-408. doi: 10.21608/asdj.2025.337176.1647
HARVARD
Ali Saleh, S. (2025). 'Evaluation of micro tensile bond strength of newly introduced universal adhesives using different bonding strategies and lining technique on human dentin: In-vitro study', Ain Shams Dental Journal, 37(1), pp. 396-408. doi: 10.21608/asdj.2025.337176.1647
VANCOUVER
Ali Saleh, S. Evaluation of micro tensile bond strength of newly introduced universal adhesives using different bonding strategies and lining technique on human dentin: In-vitro study. Ain Shams Dental Journal, 2025; 37(1): 396-408. doi: 10.21608/asdj.2025.337176.1647
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