Microscopic examination of oral sinus tracts and their associated periapical lesions.
D003751:Dental Fistula / Q000473:pathology*; D004848:Epithelium / Q000473:pathology; D006801:Humans; D010482:Periapical Abscess / Q000473:pathology; D010483:Periapical Diseases / Q000473:pathology*; D010484:Periapical Granuloma / Q000473:pathology; D011842:Radicular Cyst / Q000473:pathology