Posterior spinal fusion using a unilateral C1 posterior arch screw and a C2 laminar screw for atlantoaxial fracture dislocation

SAGE Open Med Case Rep. 2019 May 6:7:2050313X19849276. doi: 10.1177/2050313X19849276. eCollection 2019.

Abstract

Introduction: C1 lateral mass screws and C2 pedicle screws are usually chosen to fix atlantoaxial (C1-C2) instability. However, there are a few situations in which these screws are difficult to use, such as in a case with a fracture line at the screw insertion point and bleeding from the fracture site. A new technique using a unilateral C1 posterior arch screw and a C2 laminar screw combined with a contralateral C1 lateral mass screws-C2 pedicle screws procedure for upper cervical fixation is reported.

Case report: A 24-year-old woman had an irreducible C1-C2 anterior dislocation with a type III odontoid fracture on the right side due to a traffic accident. The patient underwent open reduction and posterior C1-C2 fixation. On the left side, a C1 lateral mass screws and a C2 pedicle screws were placed. Because there was bleeding from the fracture site and a high-riding vertebral artery was seen on the right side, a C1 posterior arch screw and a C2 laminar screw were chosen. Eight months after the surgery, computed tomography scans showed healing of the odontoid fracture with anatomically correct alignment.

Conclusions: Although there have been few comparable studies, fixation with unilateral C1 posterior arch screw-C2 laminar screw could be a beneficial choice for surgeries involving the upper cervical region in patients with fracture dislocation or arterial abnormalities.

Keywords: Orthopaedics; occupational therapy; rehabilitation; surgery.

Publication types

  • Case Reports