Dens invaginatus is a malformation of teeth resulted during development with infolding of dental papilla. The affected teeth radiographically show an in folding of enamel and dentin which may extend in to pulp cavity, root and root apex. Root canal treatment of these teeth is difficult due to complex root anatomy. As such, early identification of a tooth affected by dens invaginatus is important. The aim of the present report is to review the prevalence, aetiology and classification of the anomaly; with two case reports highlight the clinical and radiographic features together with management options