Right now it's not clear which patients should or shouldn't have ADRs. Studies so far show the best results with degenerative disc disease (DDD). DDD usually accompanies increased age and/or wear and tear. Most studies exclude patients who have spinal tumors, bone metastases, scoliosis, or even irregular shaped bones.
Still, as surgeons have more and more success with this treatment method, the list of possible conditions treated by ADRs is expanding. Good to excellent results over a longer period of time (up to two years) are being reported.