In vitro, relative microleakage of five restorative systems

The purpose of this study was to determine the relative microleakage of fiv e restorative systems when bonded to dentine/cementum. For the microleakage determination Class V cavity preparations were prepared on the facial surf aces of 65 teeth (10-15 for each material) below the cemento-enamel junctio n and restored. The root apices were sealed, the teeth coated with nail var nish except for 1mm surrounding the restorations and the specimens were the rmocycled (x500) in 2 per cent methylene blue solution. Root sections inclu ding the restorations were dissolved in acid and the concentrations of the dye determined spectrophotometrically. The sequence of the microleakage val ues were: Dyract < OptiBond < AeliteBond < All-Bond 2 < ScotchBond. It is c oncluded that Dyract had the lowest microleakage at dentine/cementum interf ace, which may increase the longevity of the restorative in the clinical si tuation, with no, or less secondary caries.