The so-called "horse teeth" are medically called keratinized epithelial beads. During the 5~6 weeks of human embryo development, a group of cells proliferate downward at the position equivalent to the maxilla and mandible, forming the upper zone, which is called "dental plate".

After the newborn baby or baby is born 1 to 2 months, some white balls the size of millet or rice grow on the gums in the mouth. The numbers are different. They look like little teeth.

In fact, this is not a tooth, but in the process of tooth development, the epithelial cells of oral mucosa proliferate and thicken, forming a plate shape, which is bent into a horseshoe shape according to the shape of mandibular gums. This is the dental plate. After the dental plate is formed, the deep cells proliferate rapidly, and 20 deciduous teeth embryos are formed at a certain position, which is the beginning of deciduous teeth development.

Extended data:

In the future, more than a dozen spherical "tooth buds" will gradually appear on each dental plate. When the fetus is 4 to 5 months old, the "tooth germ" develops into deciduous teeth. At this point, the dental plate breaks and breaks into tissue. Part of the broken dental plate is absorbed and disappeared, and the other part is angled to form epithelial beads. This epithelial bead quickly fell off and ran away.

Infants with malnutrition or congenital deficiency are less likely to shed epithelial beads. The local thickening of oral epithelium forms dental plate, which is the starting point of tooth germ. Sometimes the dental plate remains in the jaw or gum in the form of keratinized epithelial beads. Shortly after the baby is born, there will be keratinized epithelial beads on the gums, forming several white keratinized protrusions the size of needle caps, commonly known as "horse teeth".

Baidu encyclopedia-Maya zi