Unit 1. Enamel

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Enamel= It is.. Composition= Structure=

- hardest tissue in the body derived from ectodermal cells and covers the anatomical crown - non vital, semi permeable, semi transluscent, and variable thickness (0.05mm CEJ and 2.5mm molar cusps) - 96% inorganic calcium hydroxyapatite crystals (calcium and phosphate) and 4% organic (2% water and 2% proteins) - calcium hydroxyapatite crystals arranged in series of hexagonal rods called prisms, which are embedded into an organic matrix in different directions to form dense structure by interlocking





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