I injured my right knee 10 years ago while running. I had an arthroscopic and several Synvisc injections with temporary relief. PRP worked for about three years. Cell therapy (Lipogems) help to relieve stiffness and pain. Much improved range of motion. Dr. Darr is competent, caring, and professional. He goes the extra mile to learn the new regenerative procedures to help those patients obtain maximum function with the least invasive procedure. I tell patients all the time about Dr. Darr and his regenerative procedures.