[Odontoid process fractures associated with fractures of the pedicles of the axis (author's transl)].

The authors report their experience concerning eleven cases of that original and frequent association of fractures. The ligamentous lesions associated with those fractures are considered, justifying the necessary dynamic X rays. The eleven cases are reviewed and a classification supported by an iconography is given, according to the unstability of the odontoid or of the pedicles. The complications after orthopaedic or surgical treatment are analysed and the authors give their conclusions. The proposed treatment is conservative when the fractures are neither displaced nor unstable, and surgical when one of the two fractures is unstable. The best procedure is bi-pedicular screwing associated with C1/C2 wiring.