[Orthopedic effects of internal fixation of cervical pedicle screw on cervical spondylotic myelopathy with cervical kyphosis].

Objective: To evaluate the orthopedic effects of internal fixation of cervical pedicle screw on cervical spondylotic myelopathy with cervical kyphosis.

Methods: Seventeen patients with cervical spondylotic myelopathy with cervical kyphosis with the Cobb's angle >10 degrees underwent internal fixation of cervical pedicle screw. The patients were followed up for 13. 8 months. The Cobb's angle of cervical kyphosis was measured before operation, one week after-operation, and upon the final follow up. The neural function and cervical spine stability were evaluated using Japanese Orthopedic Association (JOA) scoring system.

Results: The average preoperative Cobb's angle of cervical kyphosis was -16.1 degrees before operation, was -3.3 degrees one week after operation, and was -3.8 degrees at the final follow-up. Follow-up 6 months after operation and at the final follow up showed that the fused segments were stable. The JOA score improved by 5.2 +/- 1.6 (P < 0.05) with a mean JOA score improvement rate of 64. 3%. No neurovascular and instrumentation-related complications occurred.

Conclusion: Internal fixation of cervical pedicle screw is effective and safe in treatment of cervical spondylotic myelopathy with cervical kyphosis.