1. Indications: 1.1. cervical disc bulge, herniation or disc degeneration with neck and shoulder pain and radicular symptoms 1.2. conservative treatment and physiotherapy not effective for at least 6 months 2. Contraindications: 2.1. cervical disc prolapse or free 2.2. tumor 2.3. vertebral body or foraminal bone formation 2.4. cervical instability 2.5. spinal cord compression 2.6. Surgical treatment of the same segment 2.7. Fracture