Abstract
The aim of this trial to evaluate the clinical and radiographic appearance of tooth that suffered from premature root formation and was treated non-surgically by mineral trioxide aggregate (MTA) as apical plug. Treatment of maxillary left central incisor which had open apices and periapical lesions by using MTA apical plugs after the root canals had been debrided and rinsed with 2.5% Sodium hypochlorite was successful. The results add to the rapidly expanding field of use of MTA (Mineral trioxide aggregate) as apical plug in teeth with open apex.