Microshear bond strength of silane containing vs silane free universal bonding systems to superficial and deep dentin : An in-vitro study / Yomna Sayed Khallaf ; Supervised Mohsen Hussein Abi Elhassan , Shereen Hafez Ibrahim

Thesis (M.Sc.) - Cairo University - Faculty of Oral and Dental Medicine - Department of Operative Dentistry

Purpose: This study was conducted to evaluate the effect of silane free versus silane containing universal adhesive systems in both self-etch and etch and rinse approach on microshear bond strength to superficial and deep dentin. Materials and methods: Total 40 extracted sound human molars were selected for this study were assigned to groups according to substrate: Superficial and deep dentin then according to adhesive: Silane containing universal adhesive (single bond universal) and silane free universal adhesive (futurabond M+), etch and rinse or self-etch approach was employed for each adhesive group. Composite microcylinder with (0.9 mm diameter and 1 mm length) was constructed on dentin surface. Bonded specimens were stored in artificial saliva for 24h or 3 months (n=10). Failure mode was examined by stereomicroscope (40x). Results: Data were analyzed by two way ANOVA followed by one way ANOVA. Duncan post-Hoc student t test, cross-tabulation and Chi square test. There was no significant difference between two adhesive systems (p>0.05). Conclusion: The bonding performance of silane containing universal adhesive is similar to silane free, the use of self-etch approach provided durable bonding performance with both adhesives, despite that generally bonds created by universal adhesives are incapable of resisting aging

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