The ramus of the patient’s injured mandible is tender, swollen, and bruised, both outside and inside his mouth (A, Fig. 62-15). The fracture does not open into his mouth and there is little displacement unless violence has been extreme, because the muscles attached to the ramus splint it so well. If there is no displacement, encourage him to move his jaw. If there is significant displacement, fix his mandible by interdental wiring as described below.