The malformed lingual groove of left maxillary central incisor with two root canals:A case report / 实用口腔医学杂志

Dens invaganatus is a type of abnormal morphological differentiation because of the involution in crown surface before tooth calci-fication,it is mostly found in maxillary lateral incisor teeth and rare in incisor.A case of a malformed lingual groove of left maxillary central incisor with 2 root canals is reported in the paper.

A right mandibular canine with two root canals:A case report of a Hui nationality patient / 实用口腔医学杂志

The mandibular canine usually has a single-root with a single canal.A case of a Hui nationality patient who has a mandibular ca-nine with two root canals is reported in this paper.