Transposition of mandibular lateral incisor-canine (mn.i2.C) associated with hypodontia: a review and rare clinical case.

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Transposition is a unique and extreme form of ectopic eruption in which a permanent tooth develops and erupts in the position which is normally occupied by other permanent teeth . Tooth transpositions are rare and they can be complete or incomplete . The aetiology of transposition is still obscure . Various populations have been studied , to determine the prevalence of tooth transpositions . 20 % of the transpositions which occur on the maxillary arch involve the canine and the lateral incisor . Although they are rare , transpositions may involve the maxillary lateral and central incisors . Among all transpositions , Mandibular Lateral Incisor-Canine (Mn .I 2 .C ) is the rarest , with a prevalence rate of 0 .03 %. Although various reports have been published on tooth transpositions , very few have noted the agenesis of teeth , particularly Mn .I 2 .C and its management . We are reporting a rare clinical case with associated hypodontia .