Abstract: Objective: To investigate the radiographic properties of supernumerary teeth(ST)in maxillary anterior region among children without syndrome. Methods: Pediatric patients (1-14 years old) with periapical or panoramic radiograph who visited our institution from 2016/9/1 to 2021/8/31 were included. The number, morphology, and orientation of ST were compared between different genders. Results: (1) 286 subjects were included, among which 219 were male (76.6%) and 67 were female (23.4%). (2) Of 203 single ST cases, the most common shape was conical, followed by supplemental and tuberculate type (89.7%, 9.9%, and 0.5%, respectively). Most of ST were in normal orientation, followed by inverted and horizontal orientation regarding the tooth axis (63.4%, 27.2%, and 9.4%, respectively). (3) Of 82 patients with double ST, 21 patients (25.61%) presented different morphology, 61 patients presented the same morphology, among which 42 were conical-shaped ST and 19 were supplemental shape. Forty-two patients presented different orientation of ST and 40 patients presented the same orientation for the double ST patients. Conclusion: Males were more affected with ST than females. Most patients presented a single ST in maxillary anterior region. The most commonly shape was conical and the most commonly orientation was normal. For patients who have double ST, there were a significant proportion of inconsistent shapes and orientations. There were no significant differences in morphology and orientation between gender.

Key words: supernumerary teeth, mesiodens, odontoma, radiograph