RESUMO
Treatment of cervical spine fracture in patients with ankylosing spondylitis is difficult. Biomechanical changes related to ossified ankylosing spondylitis spine make cervical spine fractures highly unstable. They cover the entire width of the spine inducing. multidirectional instability and the risk of neurological injuries. Treatment is more difficult that in the nonossified spine. Different treatments have been proposed including anterior stabilization, posterior stabilization, or both. This paper present a case of an 55-year-old man followed for ankylosing spondylitis admitted for fracture dislocation of c5-c6 following a minimal trauma of which it was operated 4 times in order to obtain a satisfactory reduction and stabilization from which we drew the importance of the osteosynthesis by combined way.