CAUSES OF ROOT CANAL TREATMENT FAILURE

The aim of this study was to determine different causes of endodontic treatment failure in patients who approached ourDepartment of Conservative Dentistry and Endodontics for re- treatment.This study included one hundred fifty patientsof both genders with different post endodontic treatment complaints.Clinical and radio- graphic examination was usedto confirm treatment failure. The most common clinical symptoms were tenderness, tenderness and pain, or swelling(72%, 29.3% and 22.7% respectively). The common causes of endodontic treatment failure were poorly filled (40%),under filled (34.7%) and no root canal filling (17.3%).Root canal failure due to overfilling was 5.3%.Most of these failedcases were either treated by internees (House officers) in the teaching institutes (34.7%) or general dental practitioners(57.3%).