Fractures of the edentulous mandible: the Chalmer J. Lyons Academy study.

Results of a study show a 20% incidence of nonunion of fractures of atrophic edentulous mandibles. Accurate bony reduction is essential in elderly paatients with thin mandibles. Closed reduction should be tried first as open reduction tends to limit vascular supply to the fracture. Maintenance of periosteal coverage seems advisable if open reduction is necessary. Bone grafting should be considered unless contraindicated because of the patient's age or physical condition. Wire mesh is preferable to bone plates for stability.