MICROLEAKAGE OF CAVIT, CAVITW, CAVITG AND IRM BY IMPEDANCE SPECTROSCOPY

The aim of this study was to quantify the sealing ability of four temp orary filling materials over 9 days using a new electrochemical techni que, Fifty-two extracted human maxillary bicuspids were selected and p repared for the measurements, They were divided into four groups of 12 teeth each, in addition to two positive and two negative controls, Af ter preparation of the endodontic access cavity the sealing ability wa s registered, After a randomization procedure one group was obturated with IRM, another group with Cavit, a third group with CavitW and the last group with CavitG, The sealability was measured just after obtura tion (time 0) and after days 1, 2, 3, 4, 7 and 9. The results showed t hat the IRM group was significantly more watertight than the different Cavit formulations, Throughout the experiment no significant differen ce was noticed between the Cavit and CavitW groups (P > 0.05), The Cav itG group was significantly less watertight throughout the measurement s (P < 0.05).