Mohammed Ali Mohammed,Yasser Fathi Hussein And Mohammed Mustafa Zayed,

ABSTRACT
Aim Of The Study: The Present Study Was Conducted To Compare The Microtensile Bond Strength Of All In One Adhesive Systems With Different Functional Monomers To Nano-filled Resin Based Composite And Bulk Fill Compsite.

Materials and Methods: A Total Of 40 Intact Human Molar Teeth Were Cleaned And The Occlusal Enamel Of The Teeth Was Removed. The Exposed Dentin Surfaces Were Polished And Rinsed, And The Different Adhesives Were Applied. A Bulk-fill Composite Resin And A Nano-filled Composite Resin Were Applied To Form Specimens Of 4 Mm Height And 6 Mm Diameter. The Specimens Were Sectioned Perpendicular To The Adhesive Interface To Produce Dentin?resin Composite Sticks, With An Adhesive Area Of Approximately 1 Mm2. The Sticks Were Subjected To Tensile Loading Until Failure Occurred.

Results: The Results Showed That The Microtensile Bond Strength Of The MDP Functional Monomer Containing Adhesive Was Higher Than That Of 3D-SR Functional Monomer Containing Adhesive Even When Using Different Types Of Composite Resins. Conclusion: It Was Concluded That, Regarding To The Microtensile Strength, The Different Functional Monomers Have A Direct Impact On The Adhesive Bonding Efficiency Either Due To Its Chemical Composition Or Due To Its PH Values, And That The 10-MDP Monomer Present In Clearfil Tri-s Bond Stands Out For Its Higher Bond Strength Values Even With Different Types Of Resin Composite.