Generally speaking, about two and a half years old baby 20 milk teeth have all erupted, you can start brushing, the correct method of brushing the baby’s teeth is very important to care for the health of the baby’s teeth, so the mother in the baby’s childhood should be taught to the baby’s correct method of brushing. 1, first brush the outer side of the upper and lower rows of teeth, the toothbrush is placed diagonally on the edge of the gums, to two to three teeth as a group, with moderate force up and down back and forth to move the toothbrush. (Figure 1) 2, brush the outer side of the upper and lower teeth, the horizontal brush, vertical brush to combine the rotating circle brush, that is, the upper teeth painted “M” shape, the lower teeth painted “W” shape. (Figure 2) 3, and then brush the inner side of the teeth, repeat the above actions. (Figure 3) 4, brush the inner incisors, the toothbrush should be placed in an upright position, with moderate force from the gums to the crown of the teeth, the lower teeth, the same reason. (Figure 4) 5. To brush the chewing surface, place the toothbrush on the chewing surface and move it back and forth. (Figure 5)