Evaluation of two speeds applied to the Profile.04 in the endodontic retreatment time of Thermafille system

The aim of this study was to compare the time spent through the 0.04ProFile system in the removal of the root fillings of the root canal in teeth obturated with the thermafill system. 30 tooths, divided in two groups have been used. The specimens have been prepared and thenobturated with the thermafill system. Two weeks after obturation, thefillings were removed using 0.04 ProFile instruments, being the speedin group I of 350 rpm and 2000 rpm in group II. The times of theremoval have been submitted to the statistical analysis, showingsignificant statistical difference between the two experimental groups,being Group II faster.