Dr. Hernigou is a Professor of Orthopaedic Surgery at the University of Paris East (France) since 1989. He is a pioneer in the use of stem cells in orthopaedic surgery. He graduated from the University of Paris where he earned his degree in medicine and subsequently in the speciality of orthopaedic surgery. Since 1990, he has developed new treatments of osteonecrosis with stem cells and later with growth factors. He has applied these techniques to patients with osteonecrosis in relation with sickle cell disease and has extended the use of bone marrow grafts to the treatment of delayed unions and non-union bony injuries. He has participated in several European and International Research Programs on bone grafts, stem cells and growth factors.