Fig. 1From: Single-visit endodontic treatment of mature teeth with chronic apical abscesses using mineral trioxide aggregate cement: a randomized clinical trialClinical and radiographical presentation of mature teeth with chronic apical abscesses. a Non-restorable tooth with sinus tract and periapical radiolucency (arrow) excluded from the study. b Restorable tooth with sinus tract and periapical radiolucency (arrow) included in the trialBack to article page