Apexification is a treatment procedure aimed at creating an apical barrier in a non-vital immature permanent tooth with incomplete root development and an open apex. The absence of apical constriction makes canal disinfection, obturation and the achievement of a predictable apical seal particularly challenging.
The purpose of this case report is to describe the non-surgical endodontic retreatment of a previously treated immature mandibular second premolar with symptomatic apical periodontitis. An MTA apical barrier was created to provide an effective apical seal, followed by root canal obturation. Follow-up demonstrated resolution of symptoms and favourable periapical healing.












