Abstract: Root canal failure is a great dilemma for clinicians and specialists.It presents challanges in all aspects.The clinician must have a plan to deal with all the obstacles he will face during the treatment In this lecture we will discuss factors to put in my while dealing with retreatment cases. Starting from diagnostic tools and how to get most informations out from them. Looking at tools that will help during the steps of retreatment. What factors are taken into consideration for better prognosis of retreatment cases.
Objectives: 1- How to use diagnostic tools for retreatment cases
2- How to gain full usage Microscope and Ultrasonic tools for retreatment cases
3- How to predict prognosis for retreatment cases