Posterior instrumentation is either combined with open reduction, or is performed after closed reduction has been successfully achieved.
MRI should be obtained preoperatively to rule out the presence of a significant disk herniation before attempting open reduction through a posterior approach.
In certain situations involving the presence of severe neurological compromise after a failed attempt at closed reduction, an open reduction can be performed even without MRI if early reduction is a priority.
Direct decompression of spinal canal caused by a vertebral body fracture intruding into the canal anteriorly cannot be addressed with a posterior approach.
Lateral mass screws vs. pedicle screws
Fixation can be achieved with either lateral mass screws, pedicle screws or combination of the two.
Because lateral mass fixation is generally sufficient, and carries less risk, pedicle screw fixation is limited to rare cases where lateral mass fixation would be insufficient or not possible.
The cervical spine lordosis must be obtained with patient positioning/reduction. The rod should be bent to keep this lordosis.
Incorrect lordosis is one of the main pitfalls of this procedure.
The screws are closed with slight compression to enhance the stability of the construct. This procedure is typically followed by anterior fixation. If posterior fixation alone is considered 2-3 levels above and below should be instrumented.
Patients are made to sit up in the bed on the first day after surgery.
A collar is commonly used following surgical stabilization to moderate patient activity.
The purpose of a collar is to prevent ranges of motion outside of limits deemed unfavorable for fracture healing. Collar is optional.
Patients with intact neurological status are made to stand and walk on the second day after surgery. Patients can be discharged when medically stable or sent to a rehabilitation center if further care is necessary. This depends on the comfort levels and presence of other associated injuries.
Patients are generally followed with periodical x-rays at 6 weeks, 3 months, 6 months, and 1 year.