A few days ago, a toothpaste manufacturer of a well-known brand was fined 6.03 million by the industrial and commercial department for an exaggerated advertisement. One of the reasons for accusing it of being a “false advertisement” was that it used post-image processing, which excessively highlighted its “magical effect” of whitening and brightening teeth within [one day]. Why do teeth change color? We often hear that smoking, drinking tea, coffee, cola, etc. will cause yellowing of teeth. This kind of tooth coloring mainly caused by pigment adhering to the tooth surface in food, beverages and mouthwash is called [exogenous coloring]; Correspondingly, the internal structure of teeth is colored due to congenital or acquired lesions of teeth and the influence of Read More …