The embryological formation of teeth starts by the cooperative action of two types of tissue. The dental lamina tucks downwards from the surface epithelium of the mouth to meet a dental papilla growing towards the surface. Enamel is formed by the ameloblast cells of an enamel organ formed from the dental lamina. Dentine is formed by the outer cells of the dental papilla.
Pulp is formed by the inner cells of the dental papilla.
Cementum is a type of modified bone that develops around the roots of a tooth. Brachydont teeth have a simple structure and do not grow very tall. The crown of a brachydont tooth is made of enamel, the inner core is made of dentine, and the root is covered by cementum. All the teeth of humans and pigs, and the incisor teeth of cattle and sheep are of this type. Bunodont teeth may be used for grinding and crushing a variety of feeds.