The enamel is the most mineralized and hardest material of the human body. The enamel is one of the three main parts of the tooth, the other two are the dentin and the cementum.

The enamel is the visible surface of the tooth, which is supported by dentin from the inner part of the tooth. 96% of the enamel is mineral substances, the leftover is water and organic substances. Because the enamel is transparent, the colour of the dentin highly influences the colour of the enamel. The colour of the enamel can range from bright yellow to greyish white. Its thickness differs depending on the surface of the tooth. Usually the enamel is the thickest on the cuspal part of the tooth and it gets thinner towards the gums till it reaches the point where the enamel and the cementum meet.