Systems and methods for displacing bony structures relative to each other using a single device is disclosed. Displacement includes distraction and compression. Bony structures are engaged with displacement arms. The user selects one of a plurality of manners in which to manipulate a user interface, where a first manner results in compression and a second manner results in distraction. The user interface is manipulated in the selected manner until a desired amount of displacement has been reached. This displacement is performed in a manner that is minimally invasive to the patient.