In an era where a perfect smile is pursued, a set of white teeth has become an important symbol of modern people’s social confidence. However, daily diets such as coffee, tea, and red wine, as well as habits like smoking, can gradually make teeth lose their luster. This article systematically explains the scientific principles of teeth whitening, a comparison of mainstream methods, and long-term care plans to help you achieve a bright smile safely and effectively. I. Underlying Causes of Teeth Yellowing II. Comparison of Mainstream Teeth Whitening Methods Method Principle Effect Duration Suitable For Laser Teeth Whitening Hydrogen peroxide...
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