Exploratory Study of 3D Printed Biodegradable Cervical Interbody Fusion Cage

Inclusion Criteria: 1. Skeletally mature patients aged between 25 and 85 years (inclusive); 2. Symptomatic cervical disc disease (SCDD) in the vertebral level between C2/C3 to C7/T1, correlated with radiculopathy or myelopathy; 3. Radiographic confirmation (by CT, MRI, x-ray, etc.) of any of the following: herniated nucleus pulposus, spondylosis or loss of disc height; 4. Requires only one cervical vertebral level to be surgically treated; 5. Failed at least 12 weeks of conservative treatment; 6. Patient must understand and sign the Informed Consent document that has been approved by the Ethics committee; 7. No significant restrictions showed by the pre-surgical routine test and examination. Exclusion Criteria: 1. Skeletally immature patients; 2. Prior radiation history at anterior cervical area; 3. Prior surgery at the level to be treated; 4. More than one vertebral level requiring treatment, confirmed radiologically by X-ray, CT, or MRI 5. Complication of ossification of the ligamentum flavum, and Ossification of the posterior longitudinal ligament; 6. Clinically compromised vertebral bodies at the affected level(s) due to trauma or tuberculosis 7. Severe osteoporosis; 8. Active systemic or local infection; 9. Participation in other investigational device or drug clinical trials within 3 months of surgery; 10. Other patients whom the investigator believe not appropriate.