Omaima H. Ghallab , Rana A. Sedky And Amin E. Amin,

ABSTRACT

Objectives: The Aim Of This In Vitro Study Was To Evaluate The Effect Of Different Doses Of Ionizing Radiation On The Microleakage Of Tooth/resin Composite Restoration Interface Using Qualitative And Quantitative Methods.

Materials and Methods: Standardized Cylindrical Class V Cavities Were Prepared On The Labial Surfaces Of 40 Extracted Bovine Permanent Incisors. The Teeth Were Randomly Divided Into 4 Groups (n=10) According To The Irradiation Dose Received In Gray (Gy); (zero, 10Gy, 30 Gy& 60 Gy). The Cavities Were Restored With Resin Composite (Artiste) Using A Solvent-free Self-etching Adhesive (Bond 1 SF). After Restoration Of The Prepared Cavities, The Irradiation Doses Were Delivered As One Shot. All Specimens Were Stored In Distilled Water For Six Months Till Testing For Microleakage Using Fluid Filtration System And Dye Penetration Method. Data Was Analyzed Using One-way ANOVA, Kruskal-Wallis, Mann-Whitney And Spearman�s Correlation Tests.

Results: No Statistical Significant Effect Of Different Radiation Doses On Microleakage (P> 0.05) By Fluid Filtration Method. Dye Penetration Showed A Highly Statistical Significant Difference Between The Non-radiated And Radiated Groups (P <0.05). Fluid Filtration And Dye Penetration Assessments Showed A Weak And Non Statistical Significant Correlation.

Conclusions: Within The Limitations Of This In-vitro Study, It Was Concluded That: The Effectiveness Of Interface Assessments; Qualitative And Quantitative Seemed To Be Same. The Grays Of Ionizing Radiation Doses Did Not Affect The Interface Profile Regarding The Microleakage Assessment. The Time Elapsed In The Test Played A Great Role In Data Registration-criticism.