Postoperative Pain and Incidence of Extrusion Following the Use of Two Intra-canal Medications in Retreatment of Single Rooted Teeth

This study aims to compare the postoperative pain and incidence of extrusion of two intracanal medications in the retreatment of single-rooted teeth.

The main question it aims to answer is:

Does the injection of intra-canal medication into the shaped root canal after complete removal of the old obturating material lead to post-operative pain and paste extrusion to periapical tissues or not?