Most age related arthritis is due to Uric Acid Crystal deposits (monosodium urate crystals) or calcium pyrophosphate crystals.
The treatment would be to remove the crystals inflaming the joint, and then inject the adult stem cells.
The fat stem cells have been used to regenerate heart muscle tissue after heart attacks, so using these fat stem cells probably would due the job.
I will have to email the Assistant Biology Department head about this at the University. She teaches Anatomy and Physiology...
But you have to remove the stuff that is inflaming the joint. Laparoscopic surgery should do the job (for removing arthritis crystals)...
Thanks.