Different techniques of reconstruction of the frontal sinus are described in the literature. The purpose of this report is to present a case of frontal fracture managed with microvascular free flap for obliteration and reconstruction of the anterior wall of the frontal sinus. In 2013 it was made a case of reconstruction of frontal sinus fracture using microvascular free flap was performed, the patient data on the type of fracture, defect size, preoperative preparation and postoperative were taken from the medical record hospitalaria. No postoperative complications occurred in donor bed or complications in the recipient bed. The operating time of surgery was 9 h. The choice of reconstruction method was based on a careful clinical, radiographic and tomographic. The radical debridement, meticulous cleaning of the frontal sinus, as well as the use of microvascular free flap in a single stage, is an excellent surgical option for the correction of the outrigger provides horizontal, nasofrontal duct sealing the muscle segment space obliteration dead.

Key words: frontal sinus fractures; frontonasal duct; obliteration; free fibula flap; facial fractures; dismasking flap