This study is testing two new devices, **prodisc C SK** and **prodisc C Vivo**, to help people with neck problems called **Symptomatic Cervical Disc Disease** (SCDD). SCDD happens when the discs in your neck cause pain or other symptoms. The study compares these new devices to another one called **Mobi-C**. People in the study will have one of the devices placed at two levels in their neck (from bones C3 to C7) and will be checked for at least 2 years.

• **Duration:** Follow-ups for 2 to 5 years.
• **Visits:** Must attend checkups, including X-rays and questionnaires.
• **Eligibility:** Ages 18-69, with specific neck problems. Cannot have certain medical conditions.

If you join, you might help find out if the new devices work well and are safe. You need to have tried other treatments first (like rest or physical therapy) without improvement. Make sure you don't have issues like severe osteoporosis or a history of neck surgery. Talk to your doctor to see if joining this study is right for you.