Missing teeth in the elderly are recommended to be filled with teeth for the following reasons: 1. Missing teeth will affect the aesthetics, such as missing front teeth, leading to patients’ speech leakage, lack of confidence, anxiety or tension; 2. In addition to affecting the aesthetics, missing front teeth will also affect the pronunciation function. Tooth is an auxiliary organ for pronunciation, when the front teeth are missing or all teeth are missing, it is hard and unclear to speak, which will then affect social interaction and communication to the point of psychological impact; 3, missing teeth will have an impact on function, and missing back teeth will reduce chewing efficiency. Although missing teeth do not necessarily mean reduced chewing function and weakened food intake, teeth are the main tool for chewing, and missing teeth can cause a subsequent reduction in chewing efficiency, or even loss. Salivary glands secrete less saliva and gastrointestinal peristalsis slows down, which not only affects the absorption of nutrients but can also lead to digestive disorders in severe cases. Missing teeth will change the choice of food for the elderly, who cannot eat hard food and often choose soft food, which is not only unpleasant to eat, but also soft food usually contains less fiber and not enough nutrients, when restoration of missing teeth can help improve food intake. Combined with the above points, elderly people need to go to regular medical institutions for restorative treatment after missing teeth.