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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
on the protected cervical regions of some teeth, especially the permanent maxillary central incisors, canines, and first premolars, and may be confused as dental calculus. [ ] darker than the other incremental lines, the neonatal line is an incremental line that separates enamel formed before and after...
https://en.wikipedia.org/wiki/Tooth_enamel