Cervical Spine Surgery

Indications for Cervical Disc Replacement

CDR is indicated for patients experiencing radiculopathy or myelopathy due to degenerative disc disease, herniated discs, or cervical spondylosis.

It is typically recommended for those who have not responded to conservative treatments, such as medication, physical therapy, or epidural steroid injections.

Technique of Cervical Disc Replacement

The CDR procedure is performed under general anesthesia, with the patient in a supine position. The main steps include:

• Exposure: A small incision is made in the front of the neck, and the muscles and soft tissues are dissected to expose the affected intervertebral disc.
• Discectomy: The damaged disc is removed, decompressing the spinal cord and nerve roots.
• Disc replacement: An artificial disc, designed to mimic the natural biomechanics of the spine, is inserted between the adjacent vertebrae.
• Closure: The wound is closed in layers, and a drain may be placed to remove any excess fluid.

Contrary to previous contraindications, many surgeons now consider CDR in patients with mild to moderate cervical spondylosis, and even previous adjacent segment fusions, due to the advancements in implant technology. Advanced and symptomatic facet joint arthritis remains a contraindication.

Benefits of Cervical Disc Replacement

CDR offers several benefits over traditional discectomy and fixation, including:

• Motion preservation: Unlike fusion procedures, CDR allows for continued spinal mobility, reducing the risk of adjacent segment degeneration.
• Faster recovery: Minimally invasive techniques appear to result in shorter hospital stays and quicker return to normal activities.
• Lower reoperation rates: CDR has been associated with lower reoperation rates compared to fusion procedures.

Risks and Complications

As with any surgical procedure, CDR carries potential risks, such as: Infection, Bleeding, Nerve injury, Implant failure or migration, Persistent pain.

Patient Experience and Postoperative Care

Following CDR, patients can expect some pain and discomfort, managed with medication. Most individuals can begin walking and engaging in light activities within a day or two after surgery.

Physical therapy is often prescribed and it is important to follow the surgeon's specific postoperative instructions and attend all scheduled follow-up appointments to monitor the healing process.

Evidence Supporting Cervical Disc Replacement

Several high-impact studies have demonstrated the superiority of CDR over discectomy and fixation:

• A 2013 study published in the Journal of Neurosurgery: Spine found that CDR showed significantly better outcomes in terms of neck disability index, neurological success, and overall patient satisfaction compared to fusion procedures (Davis et al., 2013).
• A 2015 study in The Spine Journal demonstrated that CDR patients had lower reoperation rates, lower adjacent segment degeneration rates, and better functional outcomes compared to anterior cervical discectomy and fusion (ACDF) patients (Radcliff et al., 2015).
• A 2019 meta-analysis published in the Journal of Spinal Disorders & Techniques reported that CDR resulted in better clinical outcomes, including lower reoperation rates and higher patient satisfaction scores, compared to ACDF (Wu et al., 2019).

Cervical disc replacement has emerged as a safe and effective treatment option for patients suffering from various cervical spine conditions.