OBJECTIVE To define the association between mandibular fractures and alterations of the cranio-atlo-axial joint (CAAJ).
METHODS 315 cases of displaced mandibular fractures were retrospectively evaluated by CT scan and cervical X-ray for associated alterations of the CAAJ. Statistical analysis employed the chi-square and Cohen's kappa coefficient.
RESULTS Single fractures amounted to 69.84% and multiple fractures to 30.16% of total fractures. CT scans showed a rotation of the atlas on the same side of single fractures and subluxation of the CAAJ. Vertical derangement of the joint was observed in 79.65% of single fractures and in 20.35% of multiple fractures. Approximately16.19% of all displaced mandibular fractures showed cervical disorders at long-term follow-up.
DISCUSSION The outcomes of this study revealed an association between traumatic mandibular fractures and CAAJ, accompanied by clinical disorders. These conditions require clinical attention due to their effects on long-term craniocervical functionality and future forensic issues.