Efficacy of Dynamic Radiographs in Routine Evaluations for Degenerative Cervical Spine Disease

Chung-Shik Shin; Jin-Hong Kim; Kyung-Jin Song; Byung-Wan Choi

Study Design: Retrospective study. Objectives: To analyze the usefulness of flexion-extension radiographs in the diagnosis of degenerative cervical disease. Summary of Literature Review: There is little information about the efficacy of flexion-extension radiographs in the diagnosis of degenerative cervical disease. Methods and Materials: We analyzed 1,062 patients with cervical degenerative disease who underwent flexion-extension radiographs and computed tomography (CT) or magnetic resonance imaging (MRI). The range of motion of the cervical joints was measured. Segmental instability was evaluated using the sagittal translation (≥3.5 mm) between C2 and T1, the sagittal angulation (≥3.5°), the vertebral slip angle (≥ 10°), and the dynamic spinal canal stenosis (≤12 mm). The relationship between canal compromise on CT or MRI and radiological instability was also evaluated. Results: Cervical range of motion was 36.45°±17.63° (range, 2.1°-106.6°). Segmental instability was observed in 484 patients (nine cases of sagittal translation, 79 cases of sagittal plane rotation, 415 cases of a vertical slip angle, and 21 cases of dynamic spinal stenosis). Segmental instability was related with pathology in 218 patients with available CT or MRI (42%, including five cases of sagittal translation, 32 cases of sagittal plane rotation, 171 cases of vertical slip angle, and 10 cases of dynamic spinal stenosis. Conclusions: Flexion-extension radiographs of the cervical spine were useful in diagnosing and evaluating subaxial segmental instability.

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* 2022년 이후 발행 논문의 참고문헌은 현재 구축 중입니다.

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