乳牙外伤的临床分析

目的：分析乳牙外伤患儿的年龄、性别、牙位分布、外伤类型、受伤地点、受伤原因，外伤后就诊时间和治疗方法的选择。方法：对1989－1999年在我科就诊的130例（226颗外伤牙）乳牙外伤患儿进行了临床回顾性分析。结果与结论：男孩在3－4岁，女孩在2－3岁时发生乳牙外伤的人数最多。男女比例为1．7：1。上颌乳中切牙最易受伤，占76．55％，牙齿移位是最常见的外伤类型。发生牙外伤的地点多是在家庭，其次是在道路。主要外伤方式是跌例。27％的患儿在外伤后2小时以内就诊，40％的患儿在外伤后2－24小时就诊。

The clinical analysis on traumatic injury of primary teeth

Objective To describe the etiology,distribution by age and sex,tooth position,locale place of occurrence,and type of traumatic injuries in primary teeth.The time elapsed before treatment and the treatment methods were also assessed.Methods To review the clinical date of 130 children with 226 traumatized primary teeth treated from 1989 to 1999 in the Department of Pediatric Dentistry,Peking University School of Stomatology.Results and Conclusion 3-4 years old boys and 2-3 years old girls presented the highest number of injuries.The ratio of boys and girls was 1.7:1.76.55% of the traumatized teeth were maxillary central primary incisors.The most common injuries were luxation.Most of the injuries occurred at home trather then on the street.Fall was the most common cause of injury.27% of the children visted the dentist within 2 hours after the injury,while 40% of the injured children vistited the dentist after 2 to 24 hours.Extraction or observation were the common treatment.