眼窩下縁部は睫毛下切開，結膜内切開，眼瞼切開などの
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根 本 敏 行，他
Abstract
EPIDEMIOLOGICAL STUDY OF MAXILLOFACIAL FRACTURES
IN THE DEPARTMENT OF DENTISTRY AND ORAL SURGERY,
MAKITA GENERAL HOSPITAL
Toshiyuki Nemoto 1 ）, Toshiyuki Koizumi 2 ）, Miharu Fujii 1 ）, Kenji Mitudo 2 ）
1）
Department of Dentistry and Oral Surgery, Makita General Hospital
2）
Department of Oral and Maxillofacial Surgery,
Yokohama City University Graduate School of Medicine
Maxillofacial fracture is an important treatment target disease for oral surgery due to issues such as occlusal
recovery, because it is accompanied by functional and aesthetic disorders. However, it is important to know the
characteristics of the facility because the cause and site of serious injuries, as well as the patients' age, differ
depending on the oral surgery facility and region. A total of 221 cases of maxillofacial fractures treated in our
department were examined clinically.
The male-female ratio was 2:1, and the age range was 7 to 93 years (average 54 years). The most frequent
consultation route was from the emergency department of our hospital (158 cases), followed by neurosurgery at our
hospital (50 cases), other hospitals (7 cases), and direct visits (6 cases). The most common causes of injury were
accidental falls (135 cases), traffic accidents (59 cases), violent accidents (15 cases), and sports accidents (12 cases).
Of the single fractures, zygomatic fractures were the most common (108 cases), followed by mandibular fractures
(97 cases), maxillary fractures (4 cases), nasal fractures (3 cases), and orbital floor fractures (2 cases). Of the multiple
fractures, there were 6 cases of zygomatic and maxillary fractures and 1 case of zygomatic and mandibular fractures.
As for the treatment method, 79 of 221 cases were treated with open reduction. The other 142 cases were treated
non-surgically.
The results showed that a high incidence of zygomatic and mandibular fractures in elderly patients due to a fall
was a characteristic of maxillofacial fractures in our department.
For maxillofacial fractures, prompt treatment is desired according to the characteristics of the area and facility.
Among elderly patients, women tend to have a higher incidence.
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