So on the front edge of the teeth there is always a thin cutting edge of hard enamel, a little longer than the rest of the tooth.
因而，在前牙的边缘总有一层薄薄的坚硬的珐琅质刃口，它比牙的其余部分要略微长些，起到咬啮的作用。The fluoride mixes with enamel, the hard surface on teeth, to help prevent holes, or cavities , from forming.
氟化物和牙齿表面坚硬的珐琅质混合，可以帮助预防牙洞的形成。However, preparing the rest seat on the lingual surface of a mandibular canine risks perforating the enamel.
然而，准备其余席位的舌表面的风险射孔犬下颌骨的珐琅质。It's clinically proven to whiten up to 10 shades in just 7 days without compromising tooth enamel or causing sensitivity.
它的临床证明美白不损害牙齿的珐琅质或造成灵敏度至10在短短的7天阴影。While evidence that bleaching erodes enamel is inconclusive, it may increase sensitivity.
虽然漂白侵蚀珐琅质的证据不够充分，但是这也许会增加敏感性。D: Dentists sometimes will fill a cavity by putting in a filling while the decay is still in the enamel.
当珐琅质遭到腐蚀时，医生有的时候会采取补牙的方式进行治疗。But the high sucrose content of orange juice attacks the enamel on your teeth and can increase the risk of Type 2 diabetes.
不过桔子汁高蔗糖含量会损坏牙齿的珐琅质，也能增加患2型糖尿病的风险。Bacteria living on teeth convert sugar into lactic acid, which erodes enamel and causes tooth decay.
牙齿表面的细菌会把糖转变成乳酸，腐蚀珐琅质并导致蛀牙。It has to do with the way light reflects off our enamel, the outermost layer of teeth.
这一点与光反射我们牙齿最外层珐琅质的方式有关系。