Journal of the Korean Academy of Pediatric Dentistry 2008;35(4):642-651.
Published online November 30, 2008.
Su-Kyung Heo1, Nam-Ki Choi1, Seon-Mi Kim1, Kyu-Ho Yang1, Ji-il Park2
1Department of Pediatric Dentistry, School of Dentistry, Chonnam National University and Dental Research Institute and second stage of BK 21
2Department of Dental Hygiene, GwangJu Health college 
유치와 영구치의 외상에 관한 연구
허수경1, 최남기1, 김선미1, 양규호1, 박지일2
1전남대학교 치의학전문대학원 소아치과학교실 및 치의학연구소 및 2단계 BK21
2광주 보건대학 치위생과
Correspondence:  Nam-Ki Choi,  Tel: 062-220-5476, Email:
Received: 26 May 2008   • Accepted: 28 August 2008
This study was carried out to give basic information of traumatic injuries of primary and permanent teeth which can be used for diagnosis and management of injured teeth. From January 2003 to July 2007, 570 children with 1394 teeth who came to pediatric dentistry and emergency center of Chonnam National University Hospital due to the traumatized teeth participated in this study. The following data were investigated. : age, sex, causes and places of trauma, position of injured teeth, types of injury, and treatment at the first visit. 1. Trauma prevailed at the age of 1, 6~8, 17~18 and the rate of males was more likely to be higher than the rate of females(1.9 : 1). 2. The main cause of injury is a fall-down injury for primary and mixed dentition, but is a traffic accident and fighting for permanent dentition, respectably. The place of injury for primary dentition is mainly home(45.3%), while street for mixed and permanent dentition. 3. The position of injured teeth according to the area in the mouth is mainly maxillary anterior teeth in both case of primary and permanent teeth and especially, the ratio of central incisors is high. 4. The periodontal tissue injury occurred the most frequently in the primary and the permanent teeth, but the ratio of hard tissue injury in the permanent teeth increased, compared with the primary teeth. 5. Among treatments at the first visit, observation without actual treatment comprised 75.6% in the primary teeth and 55.4% in the permanent teeth, respectably. The pulp necrosis occurred in 20.3% of the primary teeth and 26.6% of the permanent teeth in the case of the periodontal tissue injuries, respectably.
Key Words: Dental trauma, Primary dentition, Mixed dentition, Permanent dentition, Primary teeth, Permanent teeth.

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