in 2009 had severe lower back pain. had mri done spine surgeon said i needed l5 l4 s1 fused. he did minimally invasive fusion thru the stomach was walking in 24 hrs and out of the hospital in 48 hrs with very little pain. no rehab needed with this procedure. after about 6 months started having a different lower back pain. they started giving me si joint injections, they worked for about a year and a half then they stopped working. i went to a doctor that did minimal invasive s i bone surgery. had left side done worked very well. very little therapy needed. 6 weeks later had right side done. right side did not work. had si injection on right side only and it took care of my pain for only 8 weeks. pain is back going to see my surgeon tomorrow. will keep you all posted on outcome.