Good or bad teeth are closely related to human health. At the early stage of tooth decay, it is difficult to detect it by yourself, and it is often too late to seek medical attention when you have toothache. Annual oral examination can deal with early caries and remove plaque and tartar. We should pay attention to the following points in the aspect of dental cleaning and dental care: 1, adhere to scientific brushing is an important measure to keep the oral cavity clean and prevent dental caries. It is better to choose a small multi-headed soft nylon health care toothbrush and fluoride toothpaste, and take vertical brushing method to brush the inner and outer parts of the teeth in turn. When brushing, the action should be gentle, and the brushing time should be about 3 minutes each time. Due to the gum recession, the root of the tooth is exposed, the gap between the teeth is widened, and the food is easily embedded in the gap when eating, so you can use dental floss to remove the food residue in the gap. In the use of dental floss, do not press down hard into the gums, so as not to cause bleeding, pain and atrophy of the gums. 2, usually drink more water to avoid dry mouth. And to eat more fresh vegetables and fruits, because fresh vegetables and fruits are not only rich in vitamin C, and rich in crude fiber, must be fully chewed to swallow, chewing can stimulate the salivary glands to secrete saliva. 3, adhere to do knocking teeth work, help exercise teeth, promote saliva secretion. The specific practices are as follows: 1 after sitting quietly, knocking 30 times, knocking loudly and forcefully; 2 with the tip of the tongue in the teeth inside and outside each lick 15 times; 3 lips tightly closed, sucking hard and cheeks 15 times each.