Coffee is no longer used occasionally to install a [foreign style] prop, but has really become a favorite drink for many people, and its refreshing function also makes many people rely heavily on coffee. If many people don’t come to a big cup of coffee in the morning, the whole person feels wrong. However, many people can’t love coffee now because they drink too much yellow teeth. At lunch time, I won’t give rhubarb teeth pictures. I believe you have all seen them. Why do coffee, tea and red wine dye teeth? First of all, the enamel on the tooth surface is not as smooth and dense as porcelain. The enamel has numerous tiny pores. Coffee, tea and red wine, Read More …