“…As it is a developmental anomaly, its pathogenetic mechanism is not yet well understood; however, the deformation is through to be due to excessive pressure during dental arch formation, internal enamel epithelium growth failure, rapid and aggressive proliferation, alteration of the enamel, tooth germ accidental fusion or infection process, or trauma injuries ( Hülsmann, 1997). In the literature, its incidence ranges from 0.04% to 10% ( Hovland & Block, 1977; Rotstein et al , 1987) and the maxillary lateral incisors are considered the most affected ( Marwah et al , 2009).…”