This document defines and describes different types of bone fractures. It begins by defining a fracture as a complete or partial break in the bone from excessive force. Fractures are usually caused by traumatic injury and can be classified as simple, compound, incomplete or complete. It then describes three specific types of fractures: comminuted fractures involve the bone breaking into three or more pieces; greenstick fractures occur when the bone bends and cracks instead of breaking completely; and impacted fractures happen when broken bone fragments are driven into other fragments.