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Analysis of cervical sagittal alignment after screw-rod fixation
Robert F Heary1, Osamah J Choudhry, Devesh Jalan
1Department of Neurological Surgery, University of Medicine and Dentistry of New Jersey, New Jersey Medical School, Newark, New Jersey 17101-1709, USA. heary@umdnj.edu
Neurosurgery
|February 28, 2013
Summary
Posterior cervical screw-rod fixation effectively corrects kyphosis and maintains lordosis. This study confirms its safety and efficacy for long-term cervical sagittal alignment.
Area of Science:
- Orthopedic Surgery
- Spinal Fusion
- Cervical Spine Biomechanics
Background:
- Posterior instrumentation is standard for subaxial cervical stabilization.
- Sagittal alignment is crucial for cervical spine function and health.
Purpose of the Study:
- To evaluate the long-term impact of posterior instrumentation on cervical sagittal alignment post-surgery.
- To analyze computed tomography scans for alignment changes.
Main Methods:
- 56 patients underwent cervical screw-rod fixation over 6 years.
- Preoperative and postoperative imaging (radiographs, CT, MRI) assessed C2-C7 sagittal alignment.
- Independent observers compared alignment changes.
Main Results:
- All 56 patients achieved fusion with no instrumentation failures.
- Preoperative kyphosis improved by an average of 6.5°.
- Preoperative lordosis was well maintained (average -15.3°).
Conclusions:
- Lateral mass screw-rod fixation is safe and effective for cervical spine stabilization.
- This technique allows significant deformity correction and long-term alignment maintenance.
- It is effective for correcting kyphosis and preserving lordosis.
