Everything about Deciduous Teeth totally explained
» See also Deciduous. "Baby teeth" redirects here. For the band of that name, see Baby Teeth (band).
Deciduous teeth, otherwise known as
milk teeth,
baby teeth,
temporary teeth,
primary teeth are the first set of
teeth in the growth development of humans and many other 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.
Deciduous teeth start to form during the embryo phase of
pregnancy. The development of deciduous teeth starts at the sixth week of development as the
dental lamina. This process starts at the midline and then spreads back into the posterior region. By the time the embryo is eight weeks old, there are ten areas on the upper and lower arches that will eventually become the deciduous dentition. These teeth will continue to form until they erupt in the mouth. In the deciduous dentition there are a total of twenty teeth: five per quadrant and ten per arch. The eruption of these teeth begins at the age of six months and continues until twenty-five to thirty-three months of age. The first teeth seen in the mouth are the
mandibular centrals and the last are the
maxillary second molars.
The deciduous dentition is made up of central incisors, lateral incisors,
canines, first
molars, and secondary molars; there's one in each quadrant, making a total of four of each tooth. All of these are replaced with a permanent counterpart except for the first and second molars; they're replaced by
premolars. The deciduous teeth will remain until the age of six. At that time, the permanent teeth start to appear in the mouth resulting in mixed dentition. The erupting permanent teeth causes root resorption, where the permanent teeth push down on the roots of the deciduous teeth causing the roots to be dissolved and become absorbed by the forming permanent teeth. The process of shedding deciduous teeth and the replacement by permanent teeth is called exfoliation. This may last from age six to age twelve. By age twelve there usually are only permanent teeth remaining.
Teething age of deciduous teeth:
Various cultures have customs relating to the loss of deciduous teeth; see
tooth fairy.
Deciduous teeth are considered essential in the development of the oral cavity by dental researchers and dentists. The permanent teeth replacements develop from the same tooth bud as the deciduous teeth; this provides a guide for permanent teeth eruption. Also the
muscles of the
jaw and the formation of the jaw bones depend on the primary teeth in order to maintain the proper space for permanent teeth. The roots of deciduous teeth provide an opening for the permanent teeth to erupt. These teeth are also needed for proper development of a child's speaking and
chewing of food.
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