Abstract: Objective: To investigate the incidence and clinical characteristics of congenital permanent canines agenesis, and to analyze their distribution and clinical feature. Methods: Congenital permanent canines agenesis were collected, as well as the location and number of canines agenesis were recorded. Results: The prevalence of congenital permanent canines agenesis was 0.51% (190/37086). The number of boys (110) was more than that of girls (80), but there was no statistical difference (P＞0.05). One or two permanent canines agenesis accounted for 98.42%(187/190). The number of permanent canines agenesis in maxilla (244) was more than that in mandible (33), and the difference was statistically significant (P＜0.01). The number of teeth in the left jaw (133) was slightly less than that in the right (144), and the difference was not statistically significant (P＞0.05). Conclusion: The congenital permanent canine absence is occasionally happened in clinic. There was no difference between the genders. Most of the cases were 1-2 permanent canines absence, and the maxilla was more often happened than the mandible, however, no difference between the left and right sides.

Key words: congenital permanent canines agenesis, non-syndromic, panoramic radiograph, abnormality of tooth mumber