DR M.A. ANSARY / SCIENCE PHOTO LIBRARY DR M.A. ANSARY / SCIENCE PHOTO LIBRARY
Unerupted foetal tooth, light micrograph. The first set of teeth begin to develop around six weeks after conception. The permanent teeth begin to develop around a month after this. The foetal tooth is capped with a layer of enamel (dark purple), with a layer of dentine beneath this. The pale purple inner layer is the dental papilla, which is responsible for the formation of dentine.
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