Word: cementum
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Dates: during 1930-1939
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...normal human tooth consists of a very hard outer casing, enamel where it projects beyond the gum, cementum (bone) inside the gum line; a less hard inner body of dentin (ivory); and at the core a soft pulp which contains an exquisitely sensitive nerve. Practically all dentists treat the hard enamel and dentin as though they are dead substances...
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