I am an ER physician, so unfortunately can't chime in on those emergent therapies... I have not seen yet any patient that benefited from a reconstructed organ/tissues from stem cell research in my practice, but I can't guarantee it does not exists! For herniated discs, most of the time people get conservative treatments (physio, painkillers, infiltrations, etc.) or spinal fusions if the go with surgeries, but I heard of artificial disks (like Eichel for his neck), which are still pretty uncommon.