Abstract

The aim of this study is to evaluate the effect of dentine thickness on the rise in temperature of the external surface of the root while using several thermoplastic filling techniques. The sample included 60 mandibular premolars. The teeth lengths were uniformed to 12mm after determining working length, and then shaped with Revo-s files #30.All roots were marked with two marks (the apex- and 5mm coronal to it) and temperatures were recorded using digital thermometer with probes. The samples was divided into 5 equal groups according to the obturation technique: thermoplastic obturation with EQ-V, thermoplastic obturation with HEROFILL, thermoplastic obturation with gutta condensor, vertical thermoplastic obturation, and lateral condensation as control group. The temperature changes were in opposite correlation with root dentine thicknesses. In conclusion, we should be careful while using thermoplastic filling techniques in teeth with thin dentine walls.