Teeth are the hardest tissue in the body, but with the increase of age, the elderly will also be short of calcium. Teeth will exchange calcium ions with saliva all their lives. If the body is short of calcium, the calcium in saliva will also decrease. Teeth also lack calcium. "Soften" teeth are hard to resist bacteria in the mouth. So drink more milk and get more sunshine. Drink more bone soup.
It's too soft to brush clean. So you can choose toothbrushes with different hardness, and try the one you feel most comfortable with when brushing your teeth. It can clean your teeth without making your gums uncomfortable, which suits you.
After you find your favorite toothbrush, change it every three months, because a toothbrush that has been used for a long time will contain a lot of bacteria, which will affect people's health. Don't deposit this money.
From Ge Yu's Sanjiu Yangshengtang.