Prof Dr Yoldaş was born in Mersin. He studied dentistry at the University of Gazi where he graduated in 1993. He started his PhD research at the same university and received his PhD in 1998. He was appointed as “Associte Professor” in 2005 and as “Professor” in 2010. Dr Yoldaş is now vice dean and head of Endodontics of Çukurova University Faculty of Dentistry. He is married and has a son.


Chronic apical periodontitis is an inflamatory disorder of periradicular tissues caused by persistent microbial infection within the root canal system. The main goal of endodontic treatment is to prevent or eliminate the infection in root canals. Persistent or emerging apical periodontitis occurs when root canal treatment has not adequately performed. Usually presence of post treatment disease reflects poor clinical techniques ant the failure to eliminate infection. Alternatively, the complexity of root canal anatomy, true cysts, resistant microorganisms and foreign objects may also decrease healing rates of root canal treatment. The aim of this lecture is to provide an overview of apical periodontitis and to discuss the outcome of root canal treatment in an evidence based approach. The objectives of the presentation are given below

-Ideal criteria for satisfactory root canal treatment

-Strategies to eliminate microorganism from root canals

-Surgery vs. retreat

-Single visit vs. multiple visit

-Intracanal medication and irrigation

-Comparison of root canal obturation techniques

-Comparison of root canal preparation techniques

-Success rates of root cal treatment

-Implant vs. root canal treatment