Brush in small circular motions along the gums and in up-and-down motions along the teeth and in the spaces between. Do not brush horizontally. Brush the upper teeth in a downward motion, and the lower teeth in an upward motion.
二、牙刷在牙齦溝做小圓周刷動、牙齒與牙齒的縫則上下刷；不要左右橫刷，上排牙齒，牙刷往下刷；下排牙齒則朝上刷。