Bilateral Fusion of Permanent Mandibular Incisors: A Rare Developmental Anomaly.

ABSTRACT

Fusion is a rare developmental anomaly. Th e prevalence ranges from 0.5% to 5% based on geographic, racial, or genetic factors, which occur as a result of physical force or pressure leading to prolonged contact of the adjacent tooth follicles thus resulting in the fusion of tooth buds. Bilateral fusion of teeth has been reported to be very rare as compared to unilateral fusion which is around 0.05%. Although asymptomatic, they can be a predisposing factor for caries and cause periodontal problems due to malalignment in the arch. Th e aim of this article is to present a rare case of bilateral fusion of mandibular anterior teeth and discuss the possible histogenetic mechanism and future treatment prospectives.