Properties of tooth enamel
Very hard (like ceramics) hardest substance of human body .
Very brittle (like ceramics), very stiff (like ceramics) and low tensile strength (like ceramics) .
Cracks are often seen in the enamel of teeth .
Enamel is an anisotropic material (unlike most ceramics that are isotropic).
Enamel requires base of dentin to withstand forces (dentin acts as a support for enamel).
Unsupported enamel is subject to easily fracture or cleave along rod boundaries (organic sheath) This is an important concept in dental preparations which has to do specifically with tooth microstructure.
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