Method: In a sample of 170 upper third molars and 103 lower third molars have been made a descriptive, observational and cross-sectional study of some coronal and root anomalies, They were characterized by the absence or presence criteria of each anomaly. Both maxillary and lower third molars were examined in the search of paramolar tubercles, enamel extensions, enamel pearls and dilacerations. The data was recorded in tables and statistically analyzed.
Result: The prevalence of protostylid was found in 45% of lower third molars, while in the upper was observed distolingual tubercle in 37% of specimens. Root dilaceration prevailed in the upper third molars, with 28% to 15% of the lower. Enamel extensions in the lower group showed an incidence of 48%, and the enamel pearls were observed in 15% of the upper group.
Conclusion: This results reflect the probability of occurrence of anomalies in third molars, with many dental practice implications, and represent a local contribution to the knowledge of dental anthropology.