title: Dynamic close-mouth view radiograph method for the diagnosis of lateral dynamic instability of the atlantoaxial joint.
abstract: The purpose of the current study is to establish the dynamic close-mouth view radiograph method. Seven healthy volunteers were enrolled. Dynamic open-mouth and close-mouth view radiographs were obtained. The odontoid lateral mass interval and the dynamic atlantodental lateral shift (ADLS) were measured. The ADLS was 9.4+/-5.3% by the close-mouth view, showing a significantly greater percentage than that of 5.3+/-4.0% by the open-mouth view. The dynamic close-mouth view can be useful for diagnosis of atlantoaxial lateral instability.
authors.affiliation: Department of Radiological Technology, Kyoto Takeda Hospital, Shimogyo-ku, Kyoto, Japan.
authors.forename: Susumu
authors.initials: S
authors.lastname: Fujiwara
authors.forename: Daisaku
authors.initials: D
authors.lastname: Tokunaga
authors.forename: Ryo
authors.initials: R
authors.lastname: Oda
authors.forename: Shogo
authors.initials: S
authors.lastname: Toyama
authors.forename: Kan
authors.initials: K
authors.lastname: Imai
authors.forename: Atushi
authors.initials: A
authors.lastname: Doi
authors.forename: Toshikazu
authors.initials: T
authors.lastname: Kubo
mesh_terms: D000328:Adult; D001268:Atlanto-Axial Joint / Q000000981:diagnostic imaging*; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D007593:Joint Instability / Q000000981:diagnostic imaging*; D008297:Male; D009055:Mouth; D011187:Posture; D011859:Radiography