This chapter discusses plate fixation of fractures. Bone screws and plates are commonly used implants in orthopedics. A bone screw is used for internal fixation more often than any other implant. A cannulated screw is used in minimally invasive surgery and for precise insertion in metaphyseal or epiphyseal site over a guide wire reducing the problem of having to remove and reposition an incorrectly placed screw. Bone plates hold together the fractured ends of a bone. Plates are fastened to bone to provide fixation. Neutralization forces transmit forces from one fragment to the other fragment. The neutralization plate protects the lag screws. Compression plates act a static compression plates and produce compression in the direction of the long axis of bone. The principle of tension band plate is widely used in fracture fixation. Eccentrically loaded bones have one cortex loaded in tension and the other in compression (Pauwels). Buttress plates are applied in order to support the metaphyseal areas of cancellous bones. Reconstruction plates are thin plates which can be relatively easily contoured and are used in situations like fractures of the pelvis. This chapter also discusses the lock plating and precontoured (special plating).