A tooth is composed of several layers, each with distinct functions and properties.
1. Enamel: The outermost layer, primarily made of hydroxyapatite nanocrystals, is the hardest and most mineralized tissue in the human body. 2. Dentin: Beneath the enamel lies dentin, a less hard but more flexible tissue containing collagen fibers and hydroxyapatite nanoparticles. 3. Pulp: The innermost part of the tooth, containing nerves, blood vessels, and connective tissue.
