This section is from the book "Dental Medicine. A Manual Of Dental Materia Medica And Therapeutics", by Ferdinand J. S. Gorgas. Also available from Amazon: Dental Medicine.
Fracture of the Lower Jaw is indicated by inability to close the mouth, and to speak articulately; laceration of the gums and hemorrhage; irregularity of the teeth from displacement of the fragments of bone; crepitation. Fracture of the maxilla may, however, show no displacement, but a fracture extending through the angle or ramus, may be diagnosed by grasping the two sides of the jaw and moving them forcibly. Crepitus, increased flow of saliva, mobility of fragments, and irregularity of the teeth, if the fracture is through the body of the bone, are all signs of fracture. A swollen, red and painful condition of the tissues covering the lower jaw, occurring some days after the accident, denote the possibility of fracture, neglect causing a high degree of inflammation, and in some cases even necrosis of the bone.
Reduce by bringing the displaced portions into apposition, being guided by the arch of the teeth, and then securing them by wire, silk, or waxed sterilized ligatures around the teeth, and introducing an interdental splint.