Ha. Alhadainy et al., AN ELECTROCHEMICAL STUDY OF THE SEALING ABILITY OF DIFFERENT RETROFILLING MATERIALS, Journal of endodontics, 19(10), 1993, pp. 508-511
Eighty-eight extracted mandibular and maxillary cuspids were selected
for this study. Eighty cuspids were used as experimental groups and ei
ght were used as controls. Anatomical crowns were resected, root canal
s were prepared, and the apical 2 mm of the roots were removed. The ex
perimental roots received apical cavity preparations and were randomly
divided into four equal groups. The apical cavities were retrofilled
with amalgam, heat-sealed gutta-percha, zinc polycarboxylate cement, o
r glass ionomer cement. Leakage was measured using an electrochemical
technique. Statistical analysis of the results indicated that glass io
nomer sealed significantly better than the other materials, followed b
y amalgam, heat-sealed gutta-percha, and zinc polycarboxylate cement,
respectively.