Anderson-D'Alonzo
C2 (odontoid) fractures
Type I
Through tip of dens. Unstable (may have associated atlanto-occipital dislocation or disruption of transverse ligament). Treat with collar or halo vest.Type II
Through base of dens. Unstable, treat with halo vest or surgical fixation.Preference for surgery when:
- age ≥ 50 years
- displacement ≥ 5mm
- instability at fracture site in halo vest
- non-union after treatment with halo vest
- disruption of the transverse ligament
Note: children < 7 years almost always heal with immobilization alone.
Type III
Through body of C2. Can be unstable, treat with halo vest.Reference
Greenberg's Handbook of Neurosurgery, 7th editionSupported by:
