Abstract
The primary objective of endodontic treatments or any pulp therapy is to maintain the integrity and health of oral tissues. Endodontic treatments aim to disinfect and shape the root canal system completely and obturate it in 3D to prevent reinfection. Although initial root canal therapy has high success rates, failures can occur. The term ‘retreatment’ denotes a new intervention to retain the tooth in the oral cavity. Nonsurgical endodontic retreatment can preserve previously treated teeth with persistent periapical lesion(s), if the tooth is restorable and periodontally sound, and patient wants to keep it. The clinician and patient should select the treatment with the best long-term outcome. This case series describes endodontically treated teeth that required nonsurgical endodontic retreatment due to inadequate obturation, persistent periradicular lesion and loss of coronal seal.
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