Human tooth development

<p>Tooth development or odontogenesis is the complex process by which <a href="/facts/Tooth/Wc6IqwVf">teeth</a> form from <a href="/facts/Embryonic_cell/xpThgJVq">embryonic cells</a>, <a href="/facts/Cell_growth/wbArMaJU">grow</a>, and erupt into the <a href="/facts/Human_mouth/NJY6GYoA">mouth</a>. For <a href="/facts/Human_tooth/SVkPCLal">human teeth</a> to have a healthy <a href="/facts/Human_mouth/NJY6GYoA">oral</a> environment, all parts of the tooth must develop during appropriate stages of <a href="/facts/Fetal_development/VpV3S4lu">fetal development</a>. <a href="/facts/Deciduous_teeth/CJPbq2se">Primary (baby) teeth</a> start to form between the sixth and eighth week of prenatal development, and <a href="/facts/Permanent_teeth/76MtaDgv">permanent teeth</a> begin to form in the twentieth week. If teeth do not start to develop at or near these times, they will not develop at all, resulting in <a href="/facts/Hypodontia/jDtjUnzr">hypodontia</a> or <a href="/facts/Anodontia/U9qD1VV3">anodontia</a>.
</p><p>A significant amount of research has focused on determining the processes that initiate tooth development. It is widely accepted that there is a factor within the tissues of the first <a href="/facts/Pharyngeal_arch_1/12PBkJEN">pharyngeal arch</a> that is necessary for the development of teeth.
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Human tooth development open-in-new

Human tooth development