Human tooth fractured enamel, SEM

Human tooth fractured enamel, SEM

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Credit: DENNIS KUNKEL MICROSCOPY/SCIENCE PHOTO LIBRARY

Caption: Human tooth fractured enamel, coloured scanning electron micrograph (SEM). Fracture in a tooth revealing the enamel rod morphology. Tooth enamel is the highly mineralized covering of the crown of a tooth. It is the hardest and most highly mineralized substance of the body. Ninety-six percent of enamel consists of mineral, with water and organic material composing the rest. Enamel is a translucent substance composed of parallel rods (or prisms) of highly calcified material cemented together by a hard, calcified substance. The basic unit of enamel is called an enamel rod or enamel prism which is a tightly packed mass of hydroxyapatite crystals (also called hydroxyapatite crystals) in an organized pattern. The rods are arranged perpendicular to the surface of the enamel. Hydroxylapatite is a crystalline calcium phosphate. Also enamel has two unique classes of proteins called amelogenins and enamelins. Magnification: x400 when shortest axis printed at 25

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Keywords: 22288d, amelogenin, amelogenins, calcium phosphate, colored, coloured, cracked tooth, crown enamel, dental enamel, enamel prism, enamel prisms, enamel rod, enamel rods, enamel surface, enamelin, enamelins, false-colored, false-coloured, fractured tooth, human body, human teeth, human tooth, hydroxyapatite crystal, hydroxyapatite crystals, mineral, scanning electron micrograph, sem, teeth, teeth enamel, tooth enamel, tooth surface

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