After removing a disk from the front, your surgeon may fuse the vertebrae above and below it. This limits their movement, helping to ease pressure and pain. First, the surgeon cleans the space between the vertebrae, and restores the disk space to its original height before the disk wore out. The surgeon then plugs up the space with a plastic or metal cage. It's filled with bone chips, stem cells, or wedge-shaped bone grafts. A metal plate with screws may be added to the front of the spine to provide stability and increase the rate of fusion. As you heal, the cage or bone graft and the vertebrae above and below will grow together (fuse). After fusion, your ability to bend your neck may be slightly restricted.