Mobi-C Cervical Disc Arthroplasty

  1. Mobi-C is the first and only cervical disc in the U.S. approved to treat more than one level of the cervical spine
  2. Mobi-C is diffeerent from other cervical discs because of a unique mobile bearing core, that eliminates the need for invasive bone keels and optimizes it for two-level applications
  3. Its patented Mobile Core Technology™ allows flexion/extension and lateral bending coupled with translation similar to natural cervical motion


Anatomy and Pathology of the Neck

The cervical spine has discs between each bone that provide cushioning for movements and body loads. The discs and bones in a healthy neck allow bending from side to side and front to back, and turning left to right.

Illustration of Head & Neck Illustration of Head & Neck

Disc problems can start from over-use, an accident, or just the wear and tear of daily life. Degenerative changes in the discs may result in damage that can cause pain.

When a disc degenerates it can have tears or cracks that lose water, which cause it to become thinner and provide less padding to absorb movement.

Degenerated discs can also bulge (herniate) and pinch the spinal cord or nerves, which causes loss of feeling, weakness, pain, or tingling down the arms and hands.

Traditional Treatment Options

Before artificial discs were available, patients would often receive an Anterior Cervical Discectomy and Fusion (ACDF) procedure to alleviate the pain from a herniated disc.

In a fusion surgery, the disc is removed and either a bone spacer or a plastic implant will be placed in the disc space to restore disc height and remove pressure on the pinched nerves. A metal plate and screws can be placed on the front of the neck to hold the implant in place. The result of this procedure will be a segment that no longer moves, or is “fused”.

The potential downside of a fusion procedure, in addition to the loss of motion, is that it can create additional stress on the spinal levels above and below it. This can cause degeneration at those levels and potentially result in another future surgery.

Advantages of Mobi-C

An artificial disc like Mobi-C is an option instead of a fusion that will also be placed inside the disc space to restore height and remove pressure on the pinched nerves.

The Mobi-C device is designed to allow the neck to maintain normal motion and potentially prevent the adjacent levels from degenerating, possibly preventing future surgeries.

Mobi-C, Clinical Trial Results

In the one-level study, Mobi-C demonstrated non-inferiority to ACDF as reflected in the primary composite endpoint. In the two-level study Mobi-C demonstrated SUPERIORITY to ACDF in the primary composite endpoint. Key results from the two-level study include:

Mobi-C, How it Works

Mobile Core

Mobi-C is designed to replicate the natural motion of the cervical spine.

Mobi-C Cervical Disc

Mobi-C contains patented Mobile Core Technology™ that allows the polyethylene core to slide and rotate inside the disc for self-adjustment to the cervical spine movements. This means that Mobi-C can react to the normal motion in the cervical spine.

In addition, the mobile core is designed to reduce the stresses between the implant and adjacent bone, eliminating the more invasive fixation features found in other cervical disc replacement devices.

Bone Sparing

Mobi-C provides bone sparing fixation without chisel cuts into the small vertebral bodies of the cervical spine. Competitor’s discs achieve their fixation by drilling keel cuts or screw holes into the bone, which can prevent safe implantation at two levels.

Mobi-C was designed without a keel and therefore to be specifically applicable for both one and two-level indications.

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