Amr Abd El-Baeth Yadak, Hussein Yahya EL-Sayed And Thuraia Mohamed Genaid,

ABSTRACT
The Aim Of The Study Was To Evaluate And Compare The Microleakage And Penetration Of A Resin Infiltrant Material (Icon�) To That Of A Resin Based Fissure Sealant RBS (Fisseal) And A Resin Modified Glass Ionomer RMGI (VitremerTM) In Induced Occlusal Fissure Caries.

Materials and Methods: Sixty Extracted Human Sound Premolars Were Utilized Where Initial Fissure Caries Was Created By A PH Cycling Procedure. Samples Were Randomly Divided Into 3 Equal Groups (n = 20) According To The Type Of The Sealing Material (group I: Icon�, Group II: Fisseal, Group III: (VitremerTM). Samples In Each Group Were Then Divided Randomly Into Two Equal Subgroups A And B Where Samples In Subgroup A Were Not Thermocycled While Those In Subgroup B Were Thermocycled In Water For 500 Cycles Between 5 And 550C. All Samples Were Immersed In 1% Methylene Blue Dye Solution For 24 Hours, Sectioned Into Two Halves Along Bucco-lingual Aspect And Inspected Under Stereomicroscope. Microleakage At The Sealant Tooth Interface Was Scored And Sealant Penetration Into The Fissure Lesions Was Rated Either Complete Or Incomplete Penetration. Data Were Analyzed Using Kruskal Wallis And Mann-Whitney U Tests (P<0.05).

Results: Kruskal Wallis Test Revealed A Statistically Significant Difference Among The Groups (P< 0.05) In The Degree Of Microleakage And Penetration, Where Group I (Icon�) Revealed The Best Results Followed By Group II (Fisseal), However The Worst Results Were Found In Group III (VitremerTM). Mann-Whitney U Test Revealed No Statistically Significant Difference Between The Microleakage Recorded In Group I And Group II (P> 0.05), While A Highly Statistically Significant Difference (P= 0.000) Was Found Between Group III Versus Both Groups I & II. Thermocycling Did Not Have A Significant Effect On Microleakage Of Any Of The Tested Materials (P> 0.05). Conclusion: Icon� And Fisseal Provided Better Sealing And Penetration Into The Non-cavitated Fissure Caries Lesion Compared To VitremerTM.