A discectomy is a procedure to remove a portion of the disc that rests between each vertebrae. A herniated disc is the most common reason for spine surgery. In this type of spine surgery, the herniated disc is removed and relieve the pressure on the nerves.
A spine fusion is surgery that is done to eliminate motion between adjacent vertebrae. The spine fusion may be done because to treat a problem such as spondylolisthesis (unstable spine), or it may be done because of the extent of other surgery (such as a laminectomy).
Spinal disc replacement is a
new surgery that is still
quite uncommon. Spine disc
replacement is done to treat
specific types of back pain,
while avoiding the problems
associated with spine fusion
surgery.

