Clinical analysis of 51 children with supernumerary tooth complicated with dentigerous cyst

Objective To investigate the clinical characteristics of supernumerary tooth combined with dentigerous cyst, and to provide reference for clinical diagnosis and treatment. Methods A retrospective analysis was performed for 51 children with tooth combined with dentigerous cyst and the correlation analysis was conducted for gender, age, number of supernumerary teeth, site of disease, presence of impacted teeth and dentigerous cyst. SPSS 26.0 software was used for statistical analysis. Results Among the 51 children, 43 were males and 8 were females, with a male-to-female ratio of 5.38∶1; aged 6-16 years, with an average age of (11.51±2.93) years. 29 cases (56.86%) had one supernumerary tooth; 17 cases (33.33%) had two supernumerary teeth, and 4 cases (7.84%) and 1 case (1.96%) had three or more supernumerary teeth, respectively. Among the 81 supernumerary teeth, 82.72% were located in maxillary, 88.89% in the anterior region, 41.96% in the left side and 45.68% in the right side. Seventy-six (93.83%) supernumerary teeth did not erupt, of which 33 (40.74%) were vertically impacted. Among the 51 children, there were 57 cysts, of which 80.70% were located in the maxillary and 91.23% were located in the anterior region. There was no significant difference between whether the supernumerary tooth was in the cyst and whether it was accompanied by the impacted permanent tooth and the direction of cyst expansion (P>0.05). Conclusion Supernumerary tooth with dentigerous cyst are more common in males, and most of them are impacted teeth. Both supernumerary tooth and dentigerous cyst are common in the maxillary anterior teeth, and there is no obvious correlation between whether the supernumerary teeth are in the cyst and whether they are accompanied by impacted permanent teeth and cyst bulging direction.