Mennat Allah Aboulnaga, Olfat Alsayed Hassanien And Asmaa Ali Yassen,

ABSTRACT

Objectives: To Evaluate The Change In Mineral Content And Ultra-morphological Picture Of Demineralized Enamel After Being Treated With NovaMin Application With And Without Poly-acrylic Acid- Bioactive Glass Powder Air Abrasion After 24 Hours And 3 Month From The Remineralization Period.

Materials and Methods: Eleven Sound Extracted Premolar Human Teeth Were Used. Each Tooth Was Divided Into 2 Halves (22 Specimens) The Buccal For Group P1 (preconditioned Group) And The Lingual For Group P2 (no Preconditioning). Specimens Were Assessed Before (T0), After (T1) Demineralization, After 24 Hours (T2) And Three Months (T3) From The Remineralization Period And Storage In Artificial Saliva. Pre-conditioning Was Induced By Air-abrasion Using Bioactive Glass 45S5 And Polyacrylic Acid Powder Mixture. Subsequently, Specimens Were Treated By NovaMin (Restore-DR Collins-USA). Quantitative Energy Dispersive X-ray Spectroscopy Elemental Analysis Was Performed On Enamel To Determine Ca/P Ratio Levels. The Ultra-morphological Analysis Was Done Using The Environmental Scanning Electron Microscope To Determine The Interprismatic Distance.

Results: 24 Hours After Remineralization Period Group Revealed The Highest Ca/P Ratio For Both Preconditioned And Without Preconditioning Protocols. Three Months After Remineralization And Intact Enamel Showed Similar Ca/P Ratio Mean Values. The Highest Inter-prismatic Space And The Lowest Ca/P Ratio Were Recorded In The Demineralized Groups. The Lowest Interprismatic Space Was Shown In The Intact Enamel Conclusion: Enamel Preconditioning With Bioactive Glass Did Not Play A Role In Its Remineralization. Novamin Is A Successful Remineralizing Agent. Time Had No Effect On The Enhancement Of The Already Remineralized Enamel.