Open Reduction and Internal Fixation (ORIF) of Proximal Humerus Fracture Open Reduction and Internal Fixation (ORIF) is a surgical technique employed in severe proximal humerus fractures to restore normal anatomy and improve range of motion and function. Most proximal humerus fractures are not displaced and can be treated by a supportive sling and early rehabilitation. However, if fracture fragments are 5 mm apart or the angle between the fragments is more than 45 degrees, they are considered di