Abstract
External apical root resorption in permanent dentition is usually pathological. Local factors are the most frequent causes of resorption, especially excessive pressure and inflammation. Depending upon the type of resorption and etiology, different treatment regimens have been proposed. This case demonstrates external root resorption arrest and formation of an apical barrier by conventional endodontic therapy combined with calcium hydroxide dressing and a mineral trioxide aggregate (MTA) apical plug. The upper left central incisor exhibited severe external root resorption along with open apex in both right and left central incisors which received pulp space therapy combined with calcium hydroxide dressing. MTA apical plug backfilled with gutta-percha was performed and the access cavity was restored with composite resin. The patient has been regularly recalled every 6 months, and no symptoms or signs have been noted. Radiography the apical lesion healed and the external root resorption has been arrested after 1 year.
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