Mennatalla A. Mehena, Mohammed N. Anwar And Farid S. El-Askary,

ABSTRACT


Purpose: The Purpose Of This Study Was To Evaluate The Effect Of Bonding Protocols And Resin Cement Type On Push-out Bond Strength Of Fiber Reinforced Composite Post To Radicular Dentin.

Materials and Methods: A Total Of 72 Human Lower Premolar Teeth Were Randomly Assigned To 6 Groups (n=12) According To The Two Experimental Factors Being Investigated (bonding Protocol And Type Of Resin Cement). After Decoronation And Pulps Extirpation, The Post Spaces Were Prepared. Adhesive Was Applied On Radicular Dentin And Cured Following The Bonding Protocols Investigated (according To Manufacturer Recommendation Curing Time, Doubling The Manufacturer Recommendation Curing Time And Co-curing). Resin Cement Was Injected Inside The Root Canal And The Post Was Inserted And Either Light Cured For 40s (dual-cure Resin Cement) Or Left To Cure Chemically (chemical-cured Resin Cement). After 24 Hours, Each Root Was Sliced Into Three Slices. Each Slice Was Subjected To Push-out Bond Strength Test At A Crosshead Speed 0.5 Mm/min. ANOVA And Student T-test Were Used To Analyze The Data.

Results: Two-Way ANOVA Revealed That Neither The Bonding Protocol Nor The Type Of Cement Had Significant Effect On Push-out Bond Strength (P=0.408 And P=0.089 Respectively); While Their Interaction Showed Significant Effect On Push-out Bond Strength (P<0.0001). Conclusion: The Effect Of Curing Protocol Is Dependent On The Type Of Cement. In All Bonding Protocols, The Type Of Cement Has An Influence On The Bonding Of Fiber Post To Root Canal Dentin.