当科における過去8年間の顎顔面骨骨折の臨床統計的観察

Abstract

Clinico-statistical analysis was made in 537 patients with maxillo-facial fracture referred to the Department of Oral and Maxillo-facial Surgery, Nara Medical University Hospital, from October, 1981 to September, 1989. The following results were obtained : 1. In an investigation of frequencies according to age, the two most common age groups were those in their teens and twenties. The ratio of males to females was 2.5:1. 2. Traffic accidents were the most frequent causes. Then falling and violence followed. About 70% of the patients came to our department within 7 days after injuries. 3. The common sites of the fractures were the mandible alone in 57.7% of cases, followed by zygomatic fracture. And 14 cases were found in the combined mandible, maxilla and zygoma. 4. Open reduction was applied to 48.9% of cases in mandibular fracture, and 41.6% in zygomatic fracture.