Inclusion Criteria:  Be available for a one year follow-up Patients over 18 and under 70 years old Humeral diaphysis fracture or humeral upper extremity articular fracture (Neer 2,3 or 4), needing to be treated by anterograde nailing. No growth plates Patients covered by the French social security service Patients able to give their enlightened consent and to answer the questions asked for the trial  Exclusion Criteria:  Pregmant, breastfeeding or potentially pregmant woman Existing bone disease Polytrauma Other fractures on the same upper limb Pathologic fracture Medical history of surgery on the same shoulder Contra-indication to the surgery or the anesthesia Infection on the operating site Axillary nerve palsy Deltoid dysfunction Major disability Refusal of participation