It is the dental papilla that determines the shape of the tooth.
Teeth are formed by the development of tooth germ, which consists of enamel forming apparatus, papilla and dental capsule.
1. Enamel-forming apparatus: In the development of tooth germ, enamel-forming apparatus is formed firstly, and the development is divided into three periods, including bud-shaped period, cap-shaped period, and bell-shaped period.
2. Dental papilla: the mesenchymal cells encircling the enamel depressions in the cap-shaped period proliferate, forming the dental papilla. The cells of the papilla proliferate, increase in size and differentiate to form different tooth forms.
3. Dental capsule: The mesenchyme surrounding the enamel and papilla is called the dental capsule, which is constantly proliferating and rich in blood vessels to ensure the nutrients needed for the formation of dental tissues. Tooth germ formation begins to develop when the mother is six to seven weeks pregnant, so it is important to consume nutritious substances during this period to avoid malformation of the teeth.