Hi: I am a 78 y/o male with severe stenosis. I had 2 Vertiflex implants 6 weeks apart. The first one at L4-5 pushed L4 up and caused severe groin and thigh pain. Second on at L4-3 didn't help much. Now almost a year later still in a lot of pain. A spine surgeon suggests that the L4-5 implant helped to actually herniate the disc. Seems like a lot of the Doctors that perform this procedure are not surgeons, mine was an anesthesiologist trained by Boston Scientific to do the implants. Boston Scientific has "factory reps" that try to intervene when problems arise. Mine was a nice guy but basically no assistance. Doctor that performed the procedures no longer with that practice. I am basically sorry I ever heard of Vertiflex.