Deciduous teeth, otherwise known as
baby teeth,
temporary teeth,
milk teeth, and now more commonly
primary teeth, are the first set of
teeth in the growth development of humans and other
diphyodont mammals. They
develop during the
embryonic stage of development and erupt—that is, they become visible in the
mouth—during
infancy. They are usually lost and replaced by
permanent teeth, but in the absence of permanent replacements, they can remain functional for many years.