RESUMEN
Introduction: Since its introduction in the dentistry calcium hydroxide (Ca(OH)2 has been used for a wide variety of purposes. Its use in root canal treatment as an intracanal medication has been associated with periradicular healing. Aim: To report a case of accidentally extruded Ca(OH)2 paste into the periradicular lesion associated withthe mandibular left central incisor and evaluate the prognosis of periradicular healing. Methods:The canal of mandibular left central incisor was prepared and Ca(OH)2 paste with Iodoform was used as an intracanal medicament. The medicament was accidently extruded into the periradicular tissues. Follow-up was done to determine the effect of extruded medicament on periradicular tissues and healing. Conclusion:The follow-up radiograph after 8 months showed complete resolution of the periapical lesion and resorption of the Ca(OH)2 paste.