odontoid fracture

odontoid fracture

Orthopedics A fracture caused by 'sudden forward and backward movement of the head with respect to the trunk', with a shearing of the dens from the body of C2, with forward movement by the transverse ligament, with backward movement by the anterior arch of C1; flexion is the most common mechanism of injury; extension injuries result in posterior displacement of the dens. See C2 fracture, Odontoid.
References in periodicals archive ?
These investigators stressed the importance of the orientation of the odontoid fracture after anterior screw fixation for the facilitation of anatomical bone union; they reported an anatomical bone union rate of 50%, a non-anatomical union rate of 25%, and non-union rate of 25%.
Sasso R, Doherty BJ, Crawford MJ, Heggeness MH: Biomechanics of odontoid fracture fixation: comparison of the one-and two-screw technique.
Key Words: anterior, fusion, odontoid fracture, screw fixation
Single-serew fixation for acute Type II odontoid fracture.
TASK 2 - Stabilization of odontoid fractures using the screw Boehler,
11,13) Odontoid fractures have increased incidence relative to other C2 fractures with advancing age.
Transverse atlantal ligament disruption associated with odontoid fractures.
The Odontoid Curved Drill Guide, a surgical tool for anterior screw fixation of odontoid fractures.
Introduction to odontoid fractures: Controversies in the management of odontoid fractures.
Management of acute odontoid fractures with single screw anterior fixation.
This approach is particularly indicated in patients with conditions that are refractory to conventional wiring techniques, patients with nonunion or delayed union of odontoid fractures with atrophic changes at the fracture site, patients with an associated C1 fracture, patients in whom laminectomy is required, patients with extreme atlantoaxial instability secondary to os odontoideum or rheumatoid arthritis, and patients in whom external immobilization is difficult or contraindicated.
Odontoid fractures and lateral flexion fractures of the axis are often visualized on this view (Greenberg, 2000).