“马牙”即医学上所称的上皮珠,常发生在新生儿或小婴儿的牙床上,为白色如米粒大.小颗粒,数目不等.“马牙”的形状.大小都不象牙齿,它是由构成牙齿最原始的组织——牙板增生角化而来的,牙板一般从坐胎2个月左右就开始发育了,在发育过程中,牙板发生破碎断裂,一部分被埋藏在上下颌骨里即牙胚,后来慢慢发育 “Horse teeth ” that medically called epithelial beads, often occurs in the gums of newborns or small infants, as white as large grains. Small particles, the number varies. “Horse teeth ” shape. Are not like teeth, which is formed by the teeth of the most primitive tissue - dental plate hyperplasia from the angle, usually from the tire about 2 months after the onset of development, in the development process, the occurrence of broken plate fracture , Part of which is buried in the upper and lower jaw where the tooth germ, and later slowly develop