世界卫生组织把牙病龋齿列为世界重点防治的三大疾病之一。我国口腔疾病率高达90％以上。据牙医专家鉴定,人的牙齿可以保持100年不坏,但是大多数人的牙齿在40年后就开始变坏,其主要原因:传统的横刷对牙齿不能全面清洁反而会造成严重的磨损,另外,不规范的牙刷和不正确的刷牙方式会导致少年儿童牙 WHO lists dental caries as one of the three major diseases in the world. China's oral disease rate as high as 90%. According to the identification of dentists, human teeth can be maintained for 100 years, but most people's teeth begin to deteriorate after 40 years. The main reason is that the traditional horizontal brush can not completely clean the teeth and cause serious wear and tear, In addition, non-standard toothbrush and incorrect way of brushing children will lead to teeth