Rabab Ismail Abdel Fattah, Mohsen Hussein Abielhassan And Hossam El-Din Al-Mandouh El-Husiny,

ABSTRACT
The Aim Of This Study Was To Compare The Re-mineralizing Potential Of Two Novel Bioactive Glasses (BAGs), Based On The Particle Size I.e, Conventional And Nano-sized Particles In Comparison To A Conventional Commercially Available Tooth Mousse (casein Phosphopeptide � Amorphous Calcium Phosphate CPP-ACP) On Human Enamel And Dentin. A Total Number Of 15 Extracted Caries-free Human Permanent Molars Were Used In The Study To Form 60 Enamel And Dentin Slabs. The Slabs Were Divided Into Two Groups According To The Tooth Substrate; Enamel (A1) And Dentin (A2); 30 Slabs Each. Each Group Was Furtherly Subdivided Equally Into Three Subgroups According To The Remineralizing Agent Used; Ten Slabs Each; Conventional Size BAG (B1), Nano-sized BAG (B2) And Tooth Mousse (B3). Each Subgroup Was Furtherly Divided Into Two Classes According To The Time Of Application Of Remineralizing Agent; Five Slabs Each; Two Minutes (C1) And Eight Minutes (C2). Slabs Were Soaked In A Demineralizing Solution For Two Days. Treated Specimens Were Subsequently Stored In Artificial Saliva (pH 7.4), At 37�C For Seven Days. Artificial Saliva Was Replaced With Fresh One Every 24 Hours. Specimens Were Analyzed, Both Quantitatively And Qualitatively Using EDAX And ESEM Respectively After Both Demineralization And Remineralization Times. EDAX Revealed That All Remineralizing Agents Had Remineralizing Potential When Applied On Enamel And Dentin Except For Conventional BAG And CPP-ACP When Applied For Two Minutes On Enamel.