牙齿是陪伴人类最久的器官之一。一口健康洁白的牙齿,不仅能够提高人的生活质量,而且对社会交往也有重要的作用。难怪有些人把牙齿当作“门面”工程很重要的一部分。世界卫生组织对口腔保健特别重视,并把“牙齿清洁,无龋洞,无疼痛感,牙龈颜色正常,无出血现象”定为口腔健康标准。 Teeth is one of the longest serving human organs. A healthy and white teeth, not only can improve people's quality of life, but also have an important role in social interaction. No wonder some people think of the teeth as a very important part of the “facade” project. WHO attaches special importance to oral health care and sets “oral hygiene standards” as “clean teeth, no cavities, no pain, normal gum color, and no bleeding.”