title: [A retrospective study of 1 009 patients with oral and maxillofacial fresh trauma].
abstract: OBJECTIVE
  To analyze the epidemiological characters of fresh maxillofacial fractures in hospitalized patients by the retrospective study.
  
  
  METHODS
  From Jan. 2008 to Dec. 2013, a total of 1 009 patients with fresh maxillofacial fractures treated at Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology were investigated. The data were statistically analyzed by SPSS 21.0.
  
  
  RESULTS
  The male and female ratio was 2.94:1 and 33.5% of the patients aged from 20 to 30 years. The most common cause of the fresh fracture was road traffic accidents (424 cases, 42.0%), followed by tumblings (250 cases, 24.8%) and violence (128 cases, 12.7%). The number of new fracture was increasing gradually in recent years. The patients were at peak of 20-29 years old. The mandibular fracture was the most frequently seen (536 cases, 53.1%), followed by zygomatic complex fractures (233 cases, 23.1%). The simple maxillary fracture was rare and usually combined with other fractures. Infraorbital nerve injury was the most common one in nerve injuries (144 cases). The most common associated injury was extremity injuries (77 cases), followed by thoracic injury (65 cases) and craniocerebral injury (57 cases). Associated injuries were mostly caused by car accidents (127 sites), followed by fall (32 sites). Logictic regression analysis showed that fall and tumbling were risk factors of mandibular and condylar fracture (OR > 1, P < 0.05), while age was a protective factor (OR > 1, P < 0.05).
  
  
  CONCLUSIONS
  Oral and maxillofacial fresh fractures most commonly occurred in young people, and the most common cause of fractures was road traffic accidents. Infraorbital nerve was involved frequently. The most common associated injuries was extremity injuries.
authors.affiliation: Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing 100081, China.
authors.forename: Chen
authors.initials: C
authors.lastname: Chen
authors.affiliation: Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing 100081, China.
authors.forename: Yao
authors.initials: Y
authors.lastname: Yang
authors.affiliation: Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing 100081, China.
authors.forename: Xi
authors.initials: X
authors.lastname: Gong
authors.affiliation: Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing 100081, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: He
authors.affiliation: Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing 100081, China.
authors.forename: Jingang
authors.initials: J
authors.lastname: An
authors.affiliation: Department of Oral and Maxillofacial Surgery, Peking University School and Hospital of Stomatology, Beijing 100081, China; Email: zhangyi2000@263.net.
authors.forename: Yi
authors.initials: Y
authors.lastname: Zhang
mesh_terms: D000058:Accidental Falls / Q000706:statistics & numerical data; D000063:Accidents, Traffic / Q000706:statistics & numerical data; D000328:Adult; D000068476:Beijing / Q000453:epidemiology; D005260:Female; D006760:Hospitalization / Q000706:statistics & numerical data; D006801:Humans; D008297:Male; D008337:Mandibular Fractures / Q000453:epidemiology / Q000209:etiology; D008440:Maxillary Fractures / Q000453:epidemiology / Q000209:etiology; D008446:Maxillofacial Injuries / Q000453:epidemiology* / Q000209:etiology; D012044:Regression Analysis; D012189:Retrospective Studies; D012307:Risk Factors; D017678:Sex Distribution; D012887:Skull Fractures; D014754:Violence / Q000706:statistics & numerical data; D055815:Young Adult; D015051:Zygomatic Fractures / Q000453:epidemiology / Q000209:etiology