Truth: Scientific research shows that the strongest teeth are natural and healthy yellow teeth. They don't look as white as paper or piano keys, but both colors are darker.
The outer layer of the tooth is translucent enamel, and the dentin color of the inner layer of the enamel is yellowish instead of white, and its color will partially penetrate the enamel, making the tooth appear yellow. The healthier the enamel, the higher the degree of calcification and the higher the hardness, so that the enamel is more transparent and the yellow dentin inside is easier to show.
On the contrary, if enamel A is poorly developed and the degree of calcification is not high, the transparency will become weak, the dentin color will not penetrate, and the teeth will appear abnormal white or milky white. For example, in patients with early dental caries, chalk spots will be formed on the tooth surface due to demineralization.