Hello sir/madam, Welcome to healthcaremagic. I can certainly understand your concern I have worked through your query in detail. usually Mesenchymal stem cells (MSCs) can naturally transform into many tissues including bone, cartilage, and fibrous tissue. there’s much better evidence that bone marrow MSCs can help regenerate cartilage than fat MSCs. So if you had to choose a stem cell source for the purpose of regenerating cartilage, bone marrow would be your best choice.please make sure about that. donor stem cells would definitely work better than your own . This is also can be done for sacro iliac joint as there is nothing to worry about complications and get better soon Please check with your physician if he shares my view Post your further queries if any. Thank you