Roy-Camille classification of odontoid process fracture
The level of fracture line as described by the Anderson and D’Alonzo classification, is not predictive of the degree of instability or the risk of non-union. This classification scheme aids the management of odontoid fractures. In general anterior oblique fractures are more stable than the posterior oblique fractures.
- type I: oblique linear fracture in which its line slopes forward, with dens displacement in an anterior direction
- type II: oblique linear fracture in which its line slopes backward, with dens displacement in a posterior direction
- type III: horizontal fracture line and the dens displacement can be either anterior or posterior
- 1. Roy-Camille R, Saillant G, Judet T et-al. Factors of severity in the fractures of the odontoid process (author's transl). Rev Chir Orthop Reparatrice Appar Mot. 1981;66 (3): 183-6. Pubmed citation