Total anterior displacement of the vertebra of C2 without C2-3 locked joint and neurological deficit in Hangman＇s fracture

Hangman＇s fracture means bilateral pedicle fractures of the axis accompanying displacement and angulations between the body of C2 and C3. The injury is often caused as a result of falling down or being involved in a vehicular accident. In 1985, based on the classification of Effendi et al, Levine and Edwards proposed a new classification of Hangman＇s fracture according to the mechanism, morphology and stability. The Hangman＇s fracture was classified as type I, II, IIA and III, with type II being the most common of the four types.