"Yellow teeth are stronger", is this true?

On TV, we often see whitening advertisements of toothpaste. The characters in the advertisement have white teeth and are very beautiful. Indeed, everyone wants to have white and bright teeth, but some people's teeth are yellow, as if they have never brushed their teeth, and they will not turn white no matter how they are brushed. Although the whiter the teeth, the better they look, but the yellow teeth are stronger. Why is this? People always think that white teeth are the best and healthiest, but the latest research proves that yellow teeth are stronger than white teeth, and pale yellow teeth are the healthiest. Human teeth are divided into three parts from the inside out: pulp control, dentin and enamel. Among them, dentin and enamel are the main factors affecting tooth color. The color of teeth is mostly determined by the transparency of enamel. Under normal circumstances, enamel is translucent and milky white. The higher the transparency, the more internal dentin can be exposed. The color of dentin is yellow. If the transparency of enamel is not high, the yellow dentin will not be exposed. However, the transparency of enamel depends on its calcification. The higher the degree of calcification, the higher the hardness and the more transparent it will be. Well-developed enamel should be translucent, so the color of teeth people see should be light yellow that dentin shows through enamel. If the enamel is poorly developed and the degree of calcification is not high, the transparency will be weakened and the teeth will be abnormally white or milky white. Although yellow teeth are strong, they are not as strong as Huang Yue. Some people's yellow teeth are caused by not brushing their teeth for a long time, while others are caused by frequent smoking. In both cases, yellow teeth are unhealthy. In addition, some people's teeth will be black and gray, which may be caused by some drugs taken during their growth.