One of the ten criteria for good health proposed by the World Health Organization is that you can still retain 20 teeth at the age of 80! So, how can we protect our teeth? It is important to have a healthy set of teeth. If too many teeth are missing, the health will be affected by the reduction of chewing and digestive functions. At the same time, the loss of lip and cheek support and sunken, will make a person’s face look old and affect the beauty. Love your health, start from loving your teeth.