**3.4 Enamel hypoplasia**

A high incidence of enamel hypoplasia is found to occur more frequently in CLP patients compared with non-cleft populations, especially involving the maxillary incisors [1, 52, 62].

Dixon suggested that lip repair could cause enamel hypoplasia in deciduous incisors and tips of permanent incisor crowns related to the surgical area; whereas the palatal repair could cause some defects in the crowns of the permanent incisors [1].
