Reduction of Post-endodontic Pain After RCT When Intracanal Cryotherapy is Used.

Flex-R files sizes 15-45 taper .02 were used according to the technique on each tooth

"WaveOne instrument was used to prepare narrow, straight and curved canals, and file (40.08) was used for large canals.~Three in-and-out motions were used with lengths not beyond 3 mm in the three thirds of the canal until reaching the estimated WL."

Reciproc files were used in wide canals. Three in-and-out motions were used with lengths not beyond 3 mm in the three thirds of the canal until reaching the estimated WL.