RESUMEN
With the aim of determining the outcome of surgery, a review of patients undergoing trauma-associated atrantoaxial arthrodesis. Between 1993 and 1997, 16 patients underwent 19 proceedures, with a follow-up period of between six and 29 months. The most common reasons for surgery were odontoid fracture(n=12), os odontoideum(n=1) procedure, and neurofibrimatosis type I(n=1). Ten posterior wiring, four Halifax clamp application, one anterior screw fixation of dens, two transarticular screw fixations, and one staged operation(anterior odontoiddectomy and posterior occipitocervical fusion) were performed. All patients has been surgically managed for about three months with a Halo-vest or rigid cervical neck collar, during which time three complications associated with operative procedures arose : Halifax clamp dislodgement, malunion and subluxation kyposis. In 15 of 16 patients, fusion was successful. In caes involving complicated atlantoaxial dislocation, the authors recommend postoperative Halo-vest immobilization for sucessful fusion after posterior C1-C2 wiring or Halifax clamping