We all need to use our teeth to eat every day, and we need to eat with our teeth more than 1000 times a year, so it can be said that as long as people live, everyone cannot live without teeth. This shows that our ancient people were wise enough to recognize the importance of teeth to the age of a person when they created the word. So, how can we make our teeth healthy and long-lived? The best way is to go to the dentist once a year to clean the calculus. We know that the kettle is used to fill the water, after a long time will form scale on the wall of the kettle, the mouth is drinking water, and the parotid glands will secrete a lot of saliva, over time will be formed in the teeth and gums junction as the kettle in the scale of tartar. After the formation of calculus will stimulate inflammation of the gums, which leads to bleeding gums when brushing teeth and eating apples, in the cold, heavy breath, over time will lead to gum recession, teeth more and more long, which we often see the teeth of the elderly, and the total length of the teeth is a certain, outside the long exposed, in the part of the bone is getting shorter and shorter, and finally “head heavy foot “This is what we call “old teeth”, in fact, the teeth are not old, but not clean tartar and disease. Therefore, in order for your teeth to live a long and healthy life, it is recommended to go to the dentist once a year to clean the calculus.