The procedure was done in 2008 yet google searching by me could find nothing regarding outcome. Presumably if the stem cell treatment was shown to improve patient outcome there would have been further news about it and it would be used more widely by now. I initially got excited about stem cells to regenerate discs but now think it will be years away and then only useful in limited instances of early degeneration.
MESOBLAST'S PROPRIETARY STEM CELLS SUCCESSFULLYREPAIR/REGENERATE DAMAGED INTERVERTEBRAL DISC CARTILAGE
the testing is not honest in that they us a chemical to temporarily degenerate a healthy animal disc then add stem cells that kick start it again. naturally degenerated discs have suffered long term genetic, physical, or nutrient supply issues which are probably unable to be reversed by stem cells, imo.