The Prevalence of Ectopically Maxillary Canine and Related Factors in an Iranian Population: A Retrospective Study

Introduction: Maxillary canines commonly have an ectopic eruption. This study aimed to assess the factors related to the ectopic maxillary permanent canines. Materials and Methods: This was a descriptive cross-sectional study of 1357 panoramic radiographs from patients 8 to 13 years old. The radiography was excluded if the patient had any developmental disease or if the panoramic image had poor quality. The ectopic canine was determined. It was also detected whether the ectopic canine was unilateral or bilateral. The quadrant of the ectopic canine, the presence of missing teeth, supernumerary teeth and other teeth with ectopic eruption were also reported. Data was analyzed using SPSS version 24 applying the Chi-square test at 0.05 significance level. Results: Among the 1126 panoramic radiographs, 11.4% (128) had at least one canine with ectopic eruption. 64.1% (82) of patients with at least one ectopic canine were female and 35.9% (46) were male. (P=0.027) 69.5% (89) had unilateral ectopic canine and 30.5% (39) had bilateral ectopic canines. (P=0.001) 10.9% (14) of participants had missing teeth. 34.4% (44) of cases had other teeth with ectopic eruption and 3.1% (4) of cases had supernumerary teeth. The accompaniment of ectopic canine with other ectopic teeth was statistically significant. (P=0.022) Conclusion:Ectopic maxillary canines with the prevalence of 11.4% were more common in females; were mostly located unilaterally, and were found with other teeth with ectopic eruptions.