 Material, Method, and primary endpoint This is a prospective multicenter clinical trial randomized double-blind . The effect of addition of autologous bone marrow stem cells and BMP7 on healing necrosis is assessed by magnetic resonance imaging NMRI and is the primary endpoint . Patients are randomly assigned to two arms : 1 Group I: a simple drilling is practiced , 2 Group II : the drilling is completed by a joint supply of autologous marrow unconcentrated and recombinant BMP7 OP1 . Necrosis of the femoral head with stage I to III are retained Ficat only stage III with a recess of less than 3 mm are used , corresponding I-III according to Steinberg . Forty patients are included in each arm . A IRMN practiced preoperatively and at 6 months and 2 years. Clinical evaluation will be continued up to 5 years in testing the survival rate criterion censorship recovery by hip Expected results and possible implications In terms of radiological stabilization NMRI the effectiveness of single drilling necrosis stage I to III Ficat is 60 non- stabilization or worsening of size. The hypothesis tested is a gain stabilization and or recovery of 20 . The clinical efficacy of single drilling necrosis stage I to III Ficat is estimated at 50 50 recovery by prosthesis in 5 years . The assumption is a 20 improvement in the rate of success of the intervention . Reducing morbidity due to technical modifications has been previously tested. If the assumption of success is reached, the indications of drilling could be reinforced especially for patients with multiple visceral defects usually supported on the websites of University Hospital of Lille and Amiens and CH Roubaix organ transplant or tissue , ethyl , .. . 