Hubby has lumbar stenosis, scoliosis and a retrolysthesis from a life of, as he says, "Doing stupid guy stuff and running into immovable objects". He had two of 'em installed 5 years ago. The spinal fusion doc had recommended fusion of 5 vertebrae and said, truthfully, "the only thing I can guarantee is that you'll lose flexibility".

The Vertiflex spacers have been spectacular! EZ surgery, pretty quick recovery, took about 6 months for pain to reach it's now-low level. He's 76, super-active, stretches every day and has excellent flexibility. The only pain he now has is from L5/S1 which is not appropriate for a Vertiflex insert. He takes one 100 mg Celocoxib most (but not all) days, and is getting on with life.

Re: the comment on the Youtube video showing hammering the spacer in, weigh that against the extremely invasive spinal fusion procedure with all of it's possibilities for infection and, once again, the guaranteed lost of flexibility and almost-guaranteed adjacent-segment problems down the road. Vertiflex is highly recommended by our household.