Investigation of microleakage in V-shaped tooth defects filled with different restorative materials

Abstract

The aim of the present paper is to study the microleakage of wedge-shaped defects, filled with restorative materials of different groups. Thirty six human teeth (incisors, canines and premolars) with V-shaped defects, prepared on them, were used. The cavities were obturated with auto-cured resin-modified glass-ionomer cement (RMGIC), flowable photo-cured composite (FPC) and universal nanohybrid photo-cured composite (UPC). The microleakage was investigated by penetration of 2% methylene blue dye. The teeth were observed by light microscopy and the relative microleakage was calculated. It is established that the microleakege depends on the type of material and the application technique used. It is confirmed that the cavities, obturated with GIC, possess the highest relative microleakage 38.1% compared to the cavities, filled with photo-cured composites. The lowest relative microleakage of 18.2% is found in V-shaped defects, obturated with UPC. The relative microleakage of the cavities, filled with FPC, takes an intermediate position with 24.5%. As a result of this study, for successful filling of V-shaped defects with minimum microleakege, the universal nanohybrid composites can be recommended in application of incremental technique.