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Enamel crystals are needle‐like structures that elongate for hundreds of micrometres. These crystals are formed by accumulation of Ca2+ and phosphate. Thousands of these crystals are bundled forming a prism, which is the basic microstructural unit of mineralized enamel. The proper development of crystals and prisms are modulated by ameloblasts and their products. Field‐width is approximately 12 microns.
