The complicated method by using which tooth develop from embryonic cells, grow and erupt into the mouth is the growth of enamel or odontogenesis. All sections of the tooth need to grow for the duration of appropriate phases of fetal improvement in order for human teeth to have a properly oral atmosphere. Primary (baby) tooth begin to structure in the sixth to eighth week of prenatal development, and in the twentieth week permanent tooth begin to form. If tooth do no longer start to develop at or near these moments, they do not develop at all, main to hypodontia or anodontia.
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