“…So hyperdontia is a disorder related to polygenic inheritance and to the hyperactivity of dental lamina. Supernumerary teeth often constitute an element of developmental syndromes and disorders, such as amelogenesis imperfecta, cleft lip and palate, craniosynostosis, cleidocranial dysplasia, Crouzon syndrome, Franceschetti syndrome, Gardner syndrome, Down syndrome, Noonan syndrome, Rubenstein-Taybi syndrome, Zimmermann-Laband syndrome, Fabry syndrome, Ellis-Van Creveld syndrome, Ehlers-Danlos syndrome III and IV type, incontinentia pigmenti syndrome, oro-facio-digital type I, tricho-rhino-phalangeal syndrome, Rothmund-Thomson syndrome, Nance-Horan syndrome, Robinow syndrome, anophthalmia syndrome and Hallerman-Streiff syndrome [9,14,19,22,24,25].…”