Taurodontism in premolars.

Taurodontism is not a dental anomaly that affects only the molars. In a review of 379 premolars extracted for different pathologic reasons, three cases of taurodontism were found. The three cases were in upper premolars and were studied anatomically and radiographically. The literature was reviewed, as well as the low incidence of the condition in premolars, which is probably related to a genetic condition. Our observations support this fact, as suggested by the study of our cases from a restricted population nucleus, within a district area of the city of Seville, Spain. Among the diagnostic criteria of taurodontism, those established by Shifman and Chanannel are more objective. Finally, our findings support an embryologic origin as a result of a delay in the apical epithelial diaphragm evagination or by interference in the epitheliomesenchymatose induction.