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ABSTRACT: Clinical observations seem to indicate that some gutta-percha cones are softened by contact with sealers. The purpose of the study was to verify whether an interaction existed between some sealers and different brands of gutta-percha cones. Because previous studies have indicated that the differences between brands of gutta-percha are magnified by heat, thermatic compaction was used in conjunction with a model of a root-canal preparation with lateral canals. Three brands of cones (Kerr, UDM, Beldent) were tested with three types of endodontic sealers (AH 26, Apexit, Roth's). A group without sealer served as a control. The length of flow into the lateral canals was measured for each combination and analyzed by two-way ANOVA. A highly significant difference was found, confirming the hypothesis that an interaction between sealer and cones is present in some combinations. It was not possible to ascribe a trend of greater effect to a certain sealer, but Roth's 811 had the least effect on flow.
Journal of Endodontics 01/2004; 29(12):835-7. DOI:10.1097/00004770-200312000-00013 · 2.79 Impact Factor