忽视一个惊人的数据:中国成年人平均每年要掉3千万颗牙按照国际口腔医学界公认的“80-20”原则,80岁时口腔内应有20颗以上牙齿,牙齿自然脱落应在60岁以后。但据不完全统计,我国20-60岁城市居民中,约有2.8%的人在统计年度内有1颗甚至更多牙齿脱落,也就是说我国每年约有3000万颗牙齿“提前下岗”!很多人20多岁就频发口腔问题; Ignoring an astonishing figure: Chinese adults lose an average of 30 million teeth per year. According to the “80-20” principle recognized by the international stomatology community, there should be more than 20 teeth in the oral cavity at the age of 80, After 60 years old. However, according to incomplete statistics, about 2.8% of urban residents aged 20-60 years in China have one or more teeth falling off within the statistical year, which means about 30 million teeth in our country each year. Many people in their 20s frequently have oral problems;