While it might appear most post-fusion surgery patients can and do have a normal vary of motion, the motion is actually coming from the unfused segments. This forces more stress, put on and tear, and premature degeneration on the segments under the realm of fusion, as they carry extra body weight. The Harrington rod spine surgical procedure has been replaced by other spine surgeries such the eXtreme Lateral Interbody Fusion . Which may be done alone or with Posterior Lumbar Interbody Fusion . The XLIF known as much less invasive as a end result of the surgeon makes an incision through the affected person’s facet as an alternative of an extended incision down the backbone.