Abdullah AbdelBaky AlAfifi , Asmaa Yassen And Olfat Hassanein,

ABSTRACT

Objectives: Microhardness Evaluation Of Initial Enamel Lesions By Bioactive Glass Air-abrasion Before NovaMin Application. Methods: 40 Extracted Human Molars Were Sectioned Mesiodistally And Were Embedded In Resin Molds. Specimens Were Assigned To 4 Groups According To The Remineralization Protocol: G1- (artificial Saliva), G2- (air-abrasion), G3- (NovaMin), G4- (air-abrasion + NovaMin). Specimens Were Immersed In A Daily Renewed Demineralizing Solution To Create Artificial White Spot Lesions. Specimens Were Stored In A Daily Renewed Artificial Saliva. Microhardness Was Assessed Using Vicker�s Hardness Number (VHN) At Starting Point, After Demineralization, After 24 Hours And One Month Remineralization.

Results: The Group Of Air-abrasion That Received NovaMin For One Month Showed The Highest Statistically Significant VHN, With No Statistically Significant Difference Between The VHN Values Of This Group After Remineralization And At Starting Point.

Conclusions: Air-abrasion Of Enamel With Bioactive Glass Did Not Play A Role To Improve Remineralization.