The purpose of study is to confirm the safety and and performance of the A-SPINE's products for using 2 years. This post-market clinical follow-up study use questionnaires such as Visual Analog Scale (VAS), the Neck Disability Index (NDI), or the Oswestry Disability Index (ODI) to evaluate the clinical improvement effects. Subjects will be evaluated at pre-operation, 6 months, 12 months, and 2 years post treatment. Finally, analyze the clinical outcome, fusion rate, and adverse events.
This is a post-market clinical follow-up study that use questionnaires such as Visual Analog Scale (VAS), the Neck Disability Index (NDI), or the Oswestry Disability Index (ODI) to compare the clinical improvement effects before and after surgery.