婴儿一般长到6个月左右即开始萌出乳牙,到30个月左右出齐,共20颗。乳牙不仅能用来咀嚼食物,还有一个很重要的功能:就是通过咀嚼不断刺激牙床骨(牙槽骨)的发育和引导恒牙的萌出。有许多家长往往很关心孩子乳牙萌出的迟与早,但对乳牙的保护却不够重视,认为乳牙反正是要换掉的,即 Infants generally grow to 6 months or so that began to sprout teeth, to 30 months or so, a total of 20. Deciduous teeth can not only be used to chew food, there is a very important function: that is, through chewing continue to stimulate the development of bone (alveolar bone) and guide the eruption of permanent teeth. Many parents are often very concerned about the early and late child eruption, but the protection of deciduous teeth is not enough attention that the deciduous teeth is to be replaced anyway, that