After middle age, due to periodontal exposure. The hardness of these parts is lower than that of the crown, and the anti-caries ability is poor, and tooth cavities are easy to appear, which is called root caries in clinic. One of the characteristics of root caries is its hidden position. It is not easy to find, so it is most easily overlooked. Therefore, middle-aged and elderly people should check their teeth regularly, find tooth decay as soon as possible, fill their teeth as soon as possible, and reduce pain and loss. After middle age, teeth are prone to allergic diseases due to tooth surface wear and periodontal atrophy and dentin exposure. When it is cold, hot, sour and sweet, I feel my teeth are very weak. This repeated over-cooling and over-heating stimulation will lead to pulpitis and damage the health of teeth. There is a folk saying that "warm teeth, cold water and hot feet". Rinse your mouth and brush your teeth with warm water to avoid the stimulation of supercooling and overheating, which can reduce the occurrence of pulpitis. Life lies in exercise, and teeth also need exercise.

Three meals a day, although the teeth are also exercising, just like the limbs are exercising every day, can not completely replace health care exercise. The chewing action of three meals is not enough, and the teeth need to be exercised by themselves. As early as ancient times, our ancestors created many effective dental care methods, such as knocking teeth, tongue massage, drum washing, gritting your teeth when defecating and so on. Ursolic acid and oleanolic acid contained in jujube can prevent dental caries bacteria from producing enzymes, effectively prevent glycoprotein from precipitating to form ugly plaque, and importantly, ensure the balance of oral flora without affecting other bacteria. Many middle-aged and elderly friends' digestion and absorption function of spleen and stomach is getting worse and worse. They often eat some dates, which can not only strengthen the spleen and nourish the stomach, but also effectively protect their teeth. Lycium barbarum has the function of nourishing liver and kidney. Long-term consumption can strengthen bones and muscles, tonify kidney and strengthen teeth. In addition, Lycium barbarum can also promote the proliferation of periodontal mucosa and fibroblasts. Middle-aged and elderly friends should use 30 grams of medlar every day, chew it up and take it with warm water.