title: Computer-assisted Magerl's transarticular screw fixation for atlantoaxial subluxation.
abstract: We report two patients with rheumatoid arthritis in whom posterior atlantoaxial fixation was carried out using transarticular screws with computer assistance. Two bilateral transarticular screws were inserted in one patient; however, in the other patient, only a unilateral screw was used, because computerized images showed that the vertebral artery at the other side was placed too medially to allow insertion of the screw. Neither of these patients had any neurovascular complications after surgery. Computer-assisted surgery is useful for avoiding neurovascular complications with transarticular screw fixation of C1-2.
authors.affiliation: Department of Orthopaedic Surgery, Toyama Medical and Pharmaceutical University, Faculty of Medicine, 2630 Sugitani, Toyama 930-0194, Japan.
authors.forename: Yoshiharu
authors.initials: Y
authors.lastname: Kawaguchi
authors.forename: Hirokazu
authors.initials: H
authors.lastname: Ishihara
authors.forename: Kazuo
authors.initials: K
authors.lastname: Ohmori
authors.forename: Masahiko
authors.initials: M
authors.lastname: Kanamori
authors.forename: Tomoatsu
authors.initials: T
authors.lastname: Kimura
mesh_terms: D001172:Arthritis, Rheumatoid / Q000150:complications / Q000601:surgery; D001268:Atlanto-Axial Joint / Q000000981:diagnostic imaging / Q000601:surgery*; D001863:Bone Screws; D002574:Cervical Vertebrae / Q000000981:diagnostic imaging / Q000601:surgery; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D004204:Joint Dislocations / Q000000981:diagnostic imaging / Q000209:etiology / Q000601:surgery*; D008875:Middle Aged; D011859:Radiography; D016059:Range of Motion, Articular; D020127:Recovery of Function; D012680:Sensitivity and Specificity; D013123:Spinal Fusion / Q000295:instrumentation / Q000379:methods*; D025321:Surgery, Computer-Assisted / Q000379:methods*; D016896:Treatment Outcome