抄録
A retrospective clinic-statistical study was performed on 474 cases of maxillofacial fractures in the Department of Oral and Maxillofacial Surgery, Saiseikai Yokohamashi Tobu Hospital, between April 2007 and March 2014. The male/female ratio was 3.4：1. The most common age group was the twenties, followed by the teens; these two groups accounted for 35.4% of all subjects. The most frequent cause of injury was traffic accident (34%), followed by a fall (28%). Adolescent and late middle-age subjects often suffered injuries due to traffic accidents, fighting and sports. On the other hand, among the elderly, injuries caused by a fall increased with age. Almost all patients (82%) were referred from the emergency and critical care center in our hospital. The most common fracture sites were zygoma (33.7%), followed by mandible (31.2%) and orbita (23.6%). Open reduction was performed in 50.4% of all fractures, and more frequently in fractures with malocclusion. There were concomitant injuries except for the maxillofacial area in 39% of all maxillofacial fractures. The most common site was cranium (19%), followed by extremities (18%).
Maxillofacial fractures in our hospital are characterized by a high frequency of traffic accidents, midface fractures and concomitant injuries.
