ABSTRACT
The microleakage pattern and pupal response to visible light cured ionomer cement liner [Vitrabond] in conjunction with composite resin restoration were evaluated and compared to one auto-cured glass ionomer liner [Ketac bond]. Microleakage were evaluated in class V cavities prepared on 20 teeth which were divided into 2 groups. Cavities in group I were lined with "Vitrabond" Scotch bond 2 dental adhesive were applied over it and the cavities were filled with "Silux plus" light cured composite resin after etching of enamel margins. Cavities in group II were lined with Ketac and filled with Silux plus after acid etching of both cement lining and enamel margin. The specimens were thermocycled for 200 cycles between 5 and 50C for 1 minute. Microleakage was assessed at the cervical margins of the cavities using basic fuchsin dye after teeth sectioning