亲爱的家长:您认识我吗?我是你孩子口中的一颗六龄牙。我们一共四兄弟,都住在你孩子的口腔上下颌(见右图)。悄悄诞生,不为人知你的孩子长牙了,你多高兴啊!你可能不知道,开始长出的都是乳牙,大约两岁半时乳牙可以长齐,而到孩子五六岁的时候,在上下四颗乳磨牙的后方, Dear Parents: Do You Know Me? I am a six-year-old tooth in your child's mouth. We have a total of four brothers, all living in your child's mouth jaw (see right). Quietly born, do not know your children have long teeth, how happy you are! You may not know, are beginning to grow out of deciduous teeth, about two and a half years old teeth can be long Qi, and the child five or six years old, In the rear of the four molars,