title: Observation of an unusually large spirochete in endodontic infection.
abstract: Spirochetes in the root canal have been investigated only to a minor extent. Oral spirochetes have been detected particularly in the periodontal pocket, where small, medium-sized and large morphotypes have been reported. In the present darkfield and scanning electron microscopic study we describe a spirochete isolated from the root canal that is 7 times longer (140 microns long) and 5 times thicker (2 microns thick) than usual for treponemes.
authors.affiliation: Division of Endodontics and Department of Microbiology, Dental Faculty, University of Oslo, Norway.
authors.forename: U R
authors.initials: UR
authors.lastname: Dahle
authors.forename: L
authors.initials: L
authors.lastname: Tronstad
authors.forename: I
authors.initials: I
authors.lastname: Olsen
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D003790:Dental Pulp Necrosis / Q000382:microbiology*; D005260:Female; D006801:Humans; D008855:Microscopy, Electron, Scanning; D010485:Periapical Periodontitis / Q000382:microbiology*; D013144:Spirochaetales / Q000302:isolation & purification / Q000648:ultrastructure*; D014208:Treponema / Q000302:isolation & purification / Q000648:ultrastructure