Prevalence and characteristics of impacted maxillary canines in Southern Chinese children and adolescents

J Investig Clin Dent. 2014 Feb;5(1):38-44. doi: 10.1111/jicd.12027. Epub 2013 Jan 25.


Aim: The incidence of impacted maxillary canines in Caucasians reportedly ranges from 1% to 3%. The objectives of this study were to estimate the prevalence and determine the characteristics of impacted maxillary canines in southern Chinese children and adolescents.

Methods: This retrospective audit involved 533 subjects with impacted maxillary canines that had been treated between February 1982 and February 2009. A customized data entry form was prepared to record and evaluate the status of impacted canines.

Results: The 533 subjects (327 females and 206 males) with impacted maxillary canines, who were identified from the population of 26 039 subjects, represented a prevalence of 2.1%. Four hundred and forty-two (82.9%) of these subjects had unilaterally impacted canines, while 91 (17.1%) of them had bilateral impactions. In 442 subjects with unilateral canine impactions, 220 (49.8%) were buccally placed, 194 (43.9%) were palatally placed, and 28 (6.3%) of the canines were found to lie within the arch.

Conclusions: The overall prevalence of impacted maxillary canines in this study of 2.1% was similar to the figures quoted for Caucasian populations. In subjects with unilateral impactions, buccally impacted canines demonstrated a slightly higher incidence (49.8%) compared to palatally impacted canines (43.9%).

Keywords: ectopic tooth; impacted canine; maxillary canine; prevalence.

Publication types

  • Comparative Study

MeSH terms

  • Adolescent
  • Adult
  • Child
  • China / ethnology
  • Cuspid / pathology*
  • Dental Audit
  • Female
  • Hong Kong / epidemiology
  • Humans
  • Male
  • Maxilla / pathology*
  • Palate / pathology
  • Prevalence
  • Retrospective Studies
  • Tooth Eruption, Ectopic / epidemiology
  • Tooth, Impacted / epidemiology*
  • Young Adult