Anderson and D'Alonzo classification
Trauma and orthopaedics
Also known as: Anderson-D'Alonzo-Klassifikation (Densfraktur) · Anderson-D'Alonzo sınıflaması (dens kırığı) · Anderson and D'Alonzo classification (odontoid / dens fractures)
What it is for
Classifies fractures of the odontoid process (dens) of C2 by the level of the fracture line.
Classification
| Category | Description |
|---|---|
| Type I | avulsion fracture of the dens tip, above the transverse ligament. |
| Type II | fracture through the base of the dens at its junction with the C2 body, below the transverse ligament. |
| Type III | fracture line extending down into the cancellous body of C2. |
| Type IIA (Hadley) | type II fracture with additional comminuted fragments at the base. |
Source
Fractures of the odontoid process of the axis
J Bone Joint Surg Am 1974;56:1663–1674 (Anderson LD, D'Alonzo RT)
PMID: 4434035
- Edition
- Anderson & D'Alonzo 1974 (type IIA added by Hadley); an AO Spine upper cervical classification also exists
- Checked on
Summary of the published classification in our own words. Not a substitute for the original publication.
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