Ereny Isaac, Mona Riad And Mohamed Mostafa,

ABSTRACT


Aim: The Aim Of This Study Was To Evaluate The Effect Of Different Solvent Type Of Adhesive Systems Applied To Dry And Moist Dentin On The Microtensile Bond Strength Of Resin Composite To Dentin After 24 Hours And 3 Months Of Cyclic Loading.

Materials and Methods: A Total Of 60 Teeth Were Used In The Study. The Teeth Were Randomly Divided Into 3 Groups Of 20 Specimens Each (n=20) According To The Solvent Type Used (A), Single Bond Universal (ethanol-water), Futurabond M+ (ethanol) And Solobond M (acetone). Each Group Was Subdivided Into Two Subgroups Of 10 Specimens Each (n=10) According To Wet Or Dry Dentin Technique Used (D). Each Subgroup Was Divided Into 2 Classes Of 5 Specimens Each (n=5) According To The Number Of Received Cycles Of Mechanical And Thermo Cycling Loading That Represent 24 Hours And 3 Months (T). Adhesive System As Well As Composite Resin Application Was Done According To Manufacturer?s Instructions. Mechanical Aging Was Performed Using Programmable Logic Controlled Equipment (ROBOTA Chewing Simulator). Restored Teeth Were Serially Sectioned To Obtain Beam-shaped Specimens, With A Cross Section Area 1.0mm2. Results Were Tabulated And Statistically Analyzed Using Three-Way ANOVA Followed By Pairwise Comparison With Post Hoc Tukey Analysis And The Significance Level Was Set At P � 0.05.

Results: Cyclic Loading Showed A Significant Effect On The Microtensile Bond Strength At P�0.026.The Different Adhesives Performed Almost In A Similar Manner In Dry & Moist Conditions After 24h Cyclic Loading Except For The Ethanol-water Based Adhesives Which Performed Better In Dry Condition Compared To The Moist One. Conclusion: Under The Limits Of The Present Study It Could Be Concluded That: The Solvent Type Of The Adhesive System Does Not Affect The Bond Strength. Ethanol-water Based Adhesive Systems Act Better When Applied To Dry Dentin Compared To Moist Dentin.