Mahmoud M. Shaheen, Mohammed A.E. Khairy And Hossam El-Din A. Tawfeek,

ABSTRACT


Aim: To Compare Bulk Fill Versus The Traditionally Incrementally Applied Resin Composites In Regard To Microleakage, Microtensile Bond Strength (�TBs) And Wear Resistance.

Materials and Methods: Standardized MOD Cavities Were Made In 20 Molars And Restored With The Composite. After Thermocycling; Teeth Were Covered With A Nail Varnish Then Immersed In 0.1% Methylene Blue For 24 Hours, Thereafter Teeth Were Sectioned Mid-sagitally And The Dye Penetration Was Assessed With USB Digital Microscope. In �TBs Test; 10 Beams With A Cross-sectional Area Of Approximately 0.9 Mm2 For Each Composite Were Obtained And Submitted To A Tensile Force In A Universal Testing Machine. Wear Test Was Made With 10 Composite Cylinder For Each Type. Weight Was Measured (W1) Before Mounting In The TNO-TRIBO Meter Wear Testing Machine Then Weight Measured (W2) After Mounting. The Loss Of Weight Was Calculated By The Subtraction Of Weight Before And After Wear.

Results: X-tra Fil Showed The Highest Insignificant Mean Microleakage Compared To Grandio?SO At P=0.122. X-tra Fil Showed The Lowest Insignificant Mean �TBs (MPa) Compared To Grandio?SO At P=0.205. Finally, X-tra Fil (1.5� 0.5 �gm) Showed The Highest Insignificant Weight Loss Compared To Grandio?SO (1.3� 0.5 �gm) At P=0.403 Which Means That Bulk Fill Has Lower Non-significant Wear Resistance Values Compared To Incremental. Conclusion: Both Bulk Fill And Incremental Resin Composite Have Performed Similarly Regarding Microleakage, �TBs And Wear Resistance.