Aim :To determine the effect of the combined use of solvents (eucalyptus oil and orange oil), file retreatment, ultrasonic irrigation and rotary brushes on the cleanliness of the apical thrirdroot canal that were re-treated. Materials and Methods :25 dental samples which were divided into 5 treatment groups. Each group consists of five sample groups. Group A were specimens whose root canal filling material was removed using eucalyptus oil, file rotary retreatment and ultrasonic irrigation techniques. Group B were specimens whose root canal filling material was removed using eucalyptus oil, file rotary retreatment and rotary brushes irrigation techniques. Group C were specimens whose root canal filling material was removed using orange oil, file rotary retreatment and ultrasonic irrigation techniques. Group D were specimens whose root canal filling material was removed using eucalyptus oil, file rotary retreatment and rotary brushes technique. The control group was specimens whose root canal filling material was removed using only a rotary retreatment file.