enamel
US /ɪˈnæm.əl/
UK /ɪˈnæm.əl/

1.
2.
the hard, glossy, translucent substance covering the crown of a tooth
:
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Tooth decay can damage the tooth enamel.
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Fluoride helps strengthen tooth enamel.
the hard, glossy, translucent substance covering the crown of a tooth