Many epidemiological studies have been performed around the world in order to determine the frequency of different types of dental anomalies. There are regional and ethnic variations in the prevalence of dental anomalies.

To determine the prevalence of developmental and acquired dental anomalies in Iran, study was done from 2011 to 2012.

A total of 1,000 digital panoramic radiographs of patient were evaluated which consisted of 424 (42/4%) male and 576 (57/6%) female. Data were analyzed by Chi-square and Fisher exact tests.

Wisdom tooth impaction was the most prevalent anomaly (41.4% in females and 36% in males) followed by missing (8.7% male, 7/3% female), microdontia (3.2%), dilacerations (2.2%), macrodontia (1%), supernumerary teeth (0.8%), fusion and taurodontism (0.2%). A case of bilateral second mandibular molar impaction was observed. Germination, transposition and concrescence were not observed. Among the acquired anomalies, hypercementosis (0.6%) and internal resorption (0.4%) were the most prevalent respectively. External resorption was not observed.

Comparison of these results with those of other studies, showed that the frequency of these disorders were different in countries and communities around the world. Knowledge about these anomalies may facilitate the endodontic, prosthodontics, periodontics and surgical management of such teeth.

Tofangchiha M, Azimi S, Neirizi M. Frequency and Distribution of Dental Anomalies in Iran: A Radiographic Survey. Int J Experiment Dent Sci 2013;2(1): 14-17.