[Clinical study on surgical treatment of zygoma fractures]

This is a retrospective statistical study on zygoma fractures. This study was based on 83 cases of zygoma fractures treated surgically in Dept. of Oral and Maxillofacial Surgery, Chungnam National University Hospital from May, 1985 to Sep., 1988. Among the many items the type of fractures and surgical methods were emphasized. For convenience sake, the zygoma fracture were classified according to Knight & North's classification. The results obtained are as follows: 1. The zygoma fractures occupied 31.9% of facial bone fractures. 2. The main age group were the second decade (37.5%) and the third decade (30.0%) and the ratio of mail and femail was 5.7:1. 3. The main contributing causes of fractures was traffic accident (71.3%). 4. The zygoma fractures were classified in 6 Group. Group 1. Undisplaced fractures were 8.4%. Group 2. Only arch fractures were 9.6% Group 3. Tripod with unrotated body were 32.5% Group 4. Tripod with medially rotated body were 20.5% Group 5. Tripod with laterally rotated body were 9.6% Group 6. Complex fractures were 19.2% 5. Fixation were required in 69 cases (83.1%) after adequate reduction. 6. Fixation area the most frequently used was zygomaticofrontal suture (71.1%), and infraorbital rim (43.3%), zygomatic arch (16.9%), zygomatic buttress (6%) were followed.