Background and Purpose: Dental anomalies are one of the human problems caused by disruption of dental structure formation. These defects are evolutionary or acquired. Many epidemiological studies have been conducted to determine the prevalence of various types of the dental anomalies. The aim of the present study was to study the prevalence of dental anomalies on panoramic radiographs in Golestan province, Iran in 2014-2018.

Materials and Methods: In this retrospective descriptive study, 4500 panoramic radiographs belonging to 2897(64%) females and 1603(36%) males were assessed for evaluation of dental anomalies including: Impaction, hypertonia, microdontia, endosmosis, taurodontism, dilacerations and transposition. The One-Sample Poisson Rate, Two-Sample Poisson Rate, Fisher-Exact test were used for statistical analysis of data.

Results: The total prevalence of dental anomalies was 9.6%, most commonly in men. Dilacerations (4.8%) had the highest prevalence, followed by endosmosis (1.9%) and impaction (1.4%). Gender only affected the prevalence of dilacerations. The prevalence of impacted teeth and microdontia was higher in maxilla while endosmosis was more prevalent in mandible.

Conclusion: The dental anomalies occur with different frequencies in various populations. Since, these anomalies may be the cause of various dental problems, it seems that the precise diagnosis of these anomalies is essential in the prevention of the associated problems.