East China is one of the regions with the fastest economic development in China，accounting for 30% of the total population of the country. The proportion of the elderly population is higher than the national average，and the population aging trend is obvious. The oral health of the elderly in this area is poor，which not only affects the quality of life of the elderly，but also has a great impact on the overall health of the elderly. The elderly have more serious caries，periodontal disease and tooth loss than the young people，and they have higher requirements for oral health care. Having good oral health care habits is an important measure to prevent oral diseases.