Aim of the study was To Compare the efficiency of R
ProTaper and R-Endo retreatment files in the removal of
conventional gutta-percha and resin coated gutta-percha and
time required. 60 extracted single root premolars were selected,
and then divi
ded into two groups according to the obturation
material. Next, each group was divided into two groups
according to the methods of retreatment.
This study aimed to asses of role of obturation material (zinc oxide and eugenol
cement with gutta-percha points, Resilon) on the efficiency of endodontic retreatment with Pro-taper
system of the following respects: the degree of cleanliness of the
canal, complications, working time.
