Interfragmentary Screw Fixation of the Zygomatic Arch in Complex Midface and Zygomaticomaxillary Fractures

Zygomatic arch reduction and fixation is a key point in the treatment of complex midface and zygomaticomaxillary fractures. High-impact frontal trauma can cause posterior displacement of zygomatic bone, with a sagittal fracture of the root of the zygomatic arch extending posteriorly to the glenoid fossa. Miniplate and screw fixation of this fracture requires a large detachment of soft tissue, thus being technically more difficult for proper fixation and increasing the risk of soft tissue damage. This report describes an operative approach for fixation of this type of fracture using an adaptation of the lag screw technique. After the initial reduction of zygomatic bone, the proximal segment of the zygomatic arch containing the sagittal fracture is anatomically reduced and a 2.0-mm titanium screw is placed with an inferior inclination of 10 degrees to 15 degrees into the mastoid cells of the temporal bone, thus avoiding intracranial screw placement. This technique showed excellent results in reduction and long-term stability. It facilitates the surgical procedure, decreases the risk of soft tissue damage, and can lower costs compared with conventional miniplate and screw fixation. (C) 2015 American Association of Oral and Maxillofacial Surgeons