拥有一口洁白、健康的牙齿.会让你更加年轻!你还在为没有一口亮白的牙齿而耿耿于怀,不肯一展倾城一笑吗?想要洁白的牙齿要因人而异对症抓药哦!牙齿为何变黄?健康因素:牙齿在发育过程中由于营养不良或疾病影响。水质因素:有些地区,特别是有些山区,由于水中含氟量高,在牙齿发育阶段过多地摄入氟的牙齿会发黄。 Have a white, healthy teeth. Will make you younger! You are still not a bright white teeth to heart, refused to show off Allure smile? Want white teeth should be symptomatic medication from person to person Oh! Why the yellowing of teeth? Health factors: teeth in the development process due to malnutrition or disease. Water quality factors: In some areas, especially in some mountainous regions, teeth with excessive fluorine intake during the tooth development stage will yellow due to the high fluoride content in the water.