Teeth that are present at birth are natal teeth , and teeth that emerge through the gingiva during the first month of life are neonatal teeth . 2 Reports about significant differences between males and females are conflicting. Some studies show a higher incidence in females, this might be biased by greater parental concern about affected females. The most commonly affected teeth are mandibular incisors.
Several sources suggest a possible hereditary component.
Careful evaluation of infants with natal or neonatal teeth is recommended. In most cases it is impossible to identify pathogenetic factors. Superior placement of the tooth germ resulting in premature eruption is a common explanation. Histologically the enamel in natal and neonatal teeth is normal for the age of the children, but when the teeth erupt prematurely the uncalcified enamel matrix wears off because mineralization is not complete. The teeth turn yellow-brown and the enamel continuously breaks down.