宋代苏轼在《东坡杂记》中,谈到养生之道时曾指出:“吾有一法,常自珍之。每食已,辄以浓茶漱口,烦腻即去而脾胃不知。凡肉之在齿间者,得茶浸漱之,乃消缩,不觉脱去,不烦刺挑也,而齿便漱濯,缘此渐坚密,蠹病自已,然卒用中下茶。”这段文字,是苏东坡自己的经验实录,不但翔实可靠,而且说明了很多问题。一是挑牙不是好习惯,弊病甚多;二是饮茶可以坚齿,防龋(蠹);三是“中下茶”(即低档茶)的防龋作用较强。这都是符合科学道理的。 茶叶为什么有防龋作用呢?这主要是茶叶中氟的作用。由于氟离子具有取代牙齿中羟磷灰石的羟基的能力,形成牙齿组织的基本成分氟磷灰石,使牙齿光滑 Su Shi in the Song Dynasty in the “Dongpo Miscellaneous Notes”, talked about the health of the road had pointed out: “I have a law, often since Jane .Every food has been, no tears to tea, tired to go that stomach and I do not know. Between the teeth, who dip tea, is constricted, do not feel off, do not bother to pick the spine, and tooth rinse, thus gradually getting stronger, beet disease themselves, but the stroke with the next tea. This passage is Su Dongpo's own experience record, not only informative and reliable, but also illustrates many problems. First, pick the teeth is not a good habit, many drawbacks; Second, tea can be stomatal, anti-caries (beetles); Third, ”in the tea" (ie, low-grade tea) strong anti-caries. This is in line with scientific truth. Why tea has anti-caries effect? ​​This is mainly the role of fluorine in tea. Fluoride ions have the ability to replace the hydroxyl groups of hydroxyapatite in teeth and form the basic component of tooth tissue, fluorapatite, to make the teeth smooth