“Some elderly people have a lot of food residues, especially vegetables and lean meat fibers, embedded in their teeth after eating every day, and their teeth and gums feel painful and uncomfortable. Why is it easy for elderly people to have tooth blockage? This is because the elderly often have missing teeth, such as not timely repair dentures, can be due to the adjacent teeth tilt shift, the gap widened, food is easy to embed in it. Gum recession, gum papillae receding, periodontal disease, tooth loosening and displacement, so that the gap widens. Uneven tooth wear in the elderly causes sharp tips or edges, which will wedge like wedges between the two opposing teeth when the upper and lower collar teeth come together, temporarily separating them and pressing food into the gap. In addition, tooth decay in the elderly easily occurs in the adjacent part of teeth, forming caries stream, food embedded, not easy to take out. Some elderly people are easy to embed food in the gap between their teeth, but they often think that it is not a big problem and do not pay attention to it. In fact, the food embedment not only makes people feel uncomfortable after eating, but also the food residue exists in the gap between teeth for a long time, which will easily cause tooth decay. Embedding stimulates the swelling and inflammation of gums, which will also develop into periodontal disease and cause loosening of teeth, resulting in greater pain. Therefore, Chinese people should properly deal with food embedding to prevent dental caries and periodontal disease. The common treatment methods are, such as filling the cavity on the adjacent surface of the teeth, restoring the normal contact of the crown, timely filling the missing teeth, removing the bad caries filling or dentures, refilling and restoring, extracting the sagging and displaced maxillary wisdom teeth which lose the function of chewing, grinding the high cusps and steep crown edges, adjusting the biting and jaw relationship, etc. In addition to treatment, it is also very important for the elderly to protect themselves by flossing the food debris in the gaps after meals.