Abstract: Objective: To analyze the clinical data of dental trauma in children's primary and permanent teeth, describe the distribution of dental trauma in children, and provide reference for the treatment and prevention of dental trauma. Methods: A cross-sectional study method was used to retrospectively analyze the clinical data of 246 children with dental trauma (407 teeth) who visited the Department of Pediatric Dentistry of Stomatological Hospital in Ningxia in 2020. Results: The ratio of male to female in dental trauma was 2.04∶1.00, and the maxillary central incisors were the most likely to be involved. The number of affected teeth in each child was mostly 1-2. The incidence of dental trauma in children was high in autumn, and the peak age was 8-10 years old (P<0.05). Among the permanent teeth trauma, the most common injury type was simple tooth hard tissue and pulp injury (52.00%), and to the primary teeth was simple periodontal tissue injury (58.60%). The differences were significant (P<0.01). Conclusion: Dental trauma in children is more common in boys and aged 8-10 years, and occurs frequently in autumn. Maxillary anterior teeth are the most vulnerable. Permanent tooth trauma often damages tooth hard tissue and pulp, and primary tooth trauma often damages periodontal tissue. However, due to the lack of behavioral awareness of children's dental trauma for guardians, it is necessary to strengthen the relevant health education and improve the prevention awareness.

Key words: children, dental trauma, primary teeth, permanent teeth, retrospective analysis