Six teeth at one and a half years of age is generally a late eruption of teeth, but according to the order of eruption of teeth in the mouth, if the normal eruption is also normal phenomenon. Normal time of eruption of milk teeth, from half a year old to about 2 and a half years old, the teeth are fully erupted, in about 1 and a half years old eruption of teeth about 10 to 16 or so, but by the influence of genetic factors and personal growth conditions of different, the teeth eruption time may be advanced or pushed back, but if the teeth erupt in accordance with a certain sequence of eruption, even if the eruption of the period of time is later, is still regarded as a normal situation. During the period of eruption, children can eat a lot of hard foods, such as cookies and apples, to encourage the tooth germ to break through the gums and emerge. If the teeth are affected by trauma or caries during the period of eruption, accidental loss of teeth is not normal. You should go to the regular hospital in time for examination.