However concerns are raised while applying these results in clinical setting because of varied methodology employed in these studies. Also in a review article Gillen et al pointed out that coronal restoration may be overemphasised based on the results of the in vitro studies. So It remain to be seen whether the success of intraorifice barrier in preventing microleakage is translated from in vitro studies in to the clinical setting which by far is more challenging, variable and difficult to interpret.