A Study on the Clinical and Statistical Analysis of the Zygoma Fracture

ABSTRACT

The zygomatic bone is a major portion of the midfacial skeleton, forms the malar eminence and the four adjacent bony articulation, when the zygomatic bone was fractured, the patient was suffered from not only esthetic facial contour problem but also functional disturbance such as eyeball movement and masticatory action. This retrospective study comprised 269 patients who had 280 zygoma fractures by various accidents and treated in Pusan Paik hopital between October 1994 and October 1999. The medical records of these 269 patients with zygoma fracture were reviewed and analysed. The studied items are the time of the accidents, the age and sex distribution, the causes of the injuries, anatomical types of the fractures, associated maxillofacial and non- maxillofacial trauma, the treatment methods and fixation materials and the days of hospitalization and complications. The results were obtained. The most patients with zygomatic bone fracture were injured between 2200 and 0400. The incidence of zygomatic bone fracture was shown to be decreased annually. The monthly incidence was the highest in January, May and October. The highest incidence in age distribution was the second and third decade(45%) and male to female ratio was 4.71. And the most common cause of the zygomatic bone fracture was motor vehicle accident(51%) followed by fall down, assault, industrial accident and sports accident. The most common anatomical site of the zygomatic bone fracutre was group III type fracture(33%) by Knight and North Classification. Associated maxillofacial bone fracture was mainly maxilla, followed by nasal bone, mandible, and frontal bone. The most prevalent time interval between onset and surgical intervention was within the 10 days and the prevalent interval time between the surgical intervention and discharge was within the 14 days. Postoperative compliction was malocclusion(2 cases).