ALWAYS insist on having physical therapy after
surgery, whether fusion or disc replacement
. Some doctors are fishy about this, and it seems silly. There may be a period you need to wait after surgery for therapy, but disc/spinal degeneration ALWAYS has a postural component, and if you fixate the neck or replace the disc without retraining posture and movement, you will certainly develop early degeneration of the spine and increase risk of wearing out replacement discs.