Treatment For Quick Healing Of Diabetic Neuropathic Ulcer?

My Mother is Diabetic[Insulin-dependant] for last 35 yrs with all the complications of it except nephropathyi.e Autonomic & peripheral neuropathy , retinopathy etc . One & half month ago , she had gangrene of small finger Lt.foot & amputation had to be done at MCP Joint . Now, the doctor says its not a favourite [...]