International Arab Journal of Dentistry


An in vitro study was carried out to compare the apical leakage of root canals obturated with different techniques: Nd:YAG laser softened gutta-percha, cold lateral condensation and warm vertical condensation, and to evaluate the leakage of root fillings. Sixty human premolars (with single patent canal) were submitted to instrumentation by means of the step-back technique. The teeth were randomly divided into three experimental groups according to the obturation technique. The first group (n