Microleakage of Different Restorative Materials in Class V Restorations: In-Vitro Study

Microleakage is a major factor contributing in the occurrence of secondary carious lesions around restorations. This study aimed to evaluate the microleakage around class V restorations using different restorative materials. In this in vitro study, 32 standardized class V cavities were prepared on buccal and lingual surfaces of 16 human teeth (extracted within a period of 6 months) using bevelled conventional preparation, where occlusal margin was located at the enamel and cervical margin at the cementum/dentin level. Specimens were randomly divided into 4 groups (N= 8) for restoration with (A) GC Fuji II LC (Resin modified glass ionomer) (B) Prime and Bond universal + SDR plus (Smart dentin replacement) (C) FuturaU Bond + Admira Fusion Flow (Ormocer-based nanohybrid flowable composite) (D) Palfique universal bond + Palfique universal flow. After being stored in distilled water and finished, teeth were immersed for 24 hours in 2% methylene blue dye. Teeth were sectioned bucco-lingually and dye penetration on occlusal and cervical margins was scored using a stereomicroscope. The results were analyzed using Chi square test and Kruskal-wallis test (? = 0.05). There was statistical significant difference between microleakage at occlusal margin and at the cervical margin (p less than 0.001). None of the four different groups of restorative materials completely sealed the tooth/restoration interface at the cervical margin showing no statistical significant difference in microleakage (p = 0.054), while there was a statistical significant difference between the different materials at the occlusal margin (p = 0.024). When comparing different restorative materials in Class V cavities, the cervical margins, where adhesion is between restorative material and dentin/cementum, showed the greatest scores in microleakage (1).