POWER AND SYRED / SCIENCE PHOTO LIBRARY POWER AND SYRED / SCIENCE PHOTO LIBRARY
Enamel. Coloured scanning electron micrograph (SEM) of human tooth enamel. Enamel is the highly mineralised material covering the crown of a tooth (the crown is the part of the tooth that projects into the oral cavity). Protoplasmic fibres of epithelial cells can be seen terminating in this section (coloured pink). Enamel is an extremely hard, translucent substance composed of parallel rods (or prisms) of highly calcified material, mostly calcium phosphate and calcium carbonate. The prisms are arranged perpendicular to the surface of the enamel. Magnification: x550 at 6x7cm size.
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