PURPOSE:To analyze the occurrence and type of dental injuries(DIs)in children and adolescents with mandibular fracture by cone-beam computed tomography(CBCT),and to explore the correlation between DIs and mandibular fracture.METHODS:The data of 81 patients with mandibular fracture admitted to the Third Hospital of Hebei Medical University from January 2021 to December 2023 were reviewed,the mandibular fracture type,DIs type and dental position were obtained according to CBCT images,and the relationship between mandibular fracture type and DIs was analyzed.SPSS 26.0 software package was used for statistical analysis.RESULTS:DIs occurred in 63 patients(77.78％),with a male/female ratio of 2∶1.A total of 247 DIs occurred in 231 teeth,the most common type of DIs was extrusive luxation in primary teeth(29.17％)and immature permanent teeth(40.00％),and crown fracture(39.60％)in permanent teeth.Maxillary anterior teeth were the most common damaged tooth sites,and the difference between fracture types and DIs sites was statistically significant(P=0.047).The lesions involving soft tissue were more common in primary teeth(83.30％),and the difference between tooth development type and DIs type involving soft and hard tissue was statistically significant(P＜0.001).There were more mild injuries in immature permanent teeth(88.00％).The difference between the type of tooth development and the severity of DIs was statistically significant(P=0.001).CONCLUSIONS:CBCT can be used for comprehensive diagnosis of mandibular fracture and DIs.The occurrence and type of DIs are closely related to mandibular fracture.
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