<Tr> <Th> FMA </Th> <Td> 55629 </Td> </Tr> <Tr> <Td_colspan="2"> Anatomical terminology (edit on Wikidata) </Td> </Tr> <P> Tooth enamel is one of the four major tissues that make up the tooth in humans and many other animals, including some species of fish . It makes up the normally visible part of the tooth, covering the crown . The other major tissues are dentin, cementum, and dental pulp . It is a very hard, white to off - white, highly mineralised substance that acts as a barrier to protect the tooth but can become susceptible to degradation, especially by acids from food and drink . </P> <P> Enamel is the hardest substance in the human body and contains the highest percentage of minerals, 96%, with water and organic material composing the rest . The primary mineral is hydroxyapatite, which is a crystalline calcium phosphate . Enamel is formed on the tooth while the tooth is developing within the gum, before it erupts into the mouth . Once fully formed, it does not contain blood vessels or nerves . Remineralisation of teeth can repair damage to the tooth to a certain degree but damage beyond that cannot be repaired by the body . The maintenance and repair of human tooth enamel is one of the primary concerns of dentistry . </P>

Where is enamel located on the mature tooth
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