Anderson D'Alonzo classification

Hadley subclassification of Anderson D'Alonzo Type II Odontoid fracture

Grauer subclassification of Anderson D'Alonzo Type II Odontoid fracture

Odontoid fracture type I

Odontoid fracture type II

Type III odontoid fracture 1).

1)
Anderson LD, D'Alonzo RT. Fractures of the odontoid process of the axis. J Bone Joint Surg Am. 1974 Dec;56(8):1663-74. PubMed PMID: 4434035.