The mechanism of injury is variable, and can occur both during flexion or extension, and with or without compression 5. Odontoid fractures comprise 915 of all cervical spine fractures.1,2 The incidence of. Odontoid process fracture, also known as a peg or dens fracture, occurs where there is a fracture through the odontoid process of C2. The Anderson and D'Alonzo classification is the most commonly used classification of fractures of the odontoid process of C2.Īnother classification system is the Roy-Camille classification, which aids more in the management of odontoid fractures. Type II odontoid process fractures (a type of fracture in the second cervical vertebrae) are the most common. Type 1, Oblique fracture through the odontoid tip, Stable Type 2, Fracture through the base of the dens, Unstable. The fractures were classified as type IIA in 3 patients, type.
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