put colour on
It often occurs outside the teeth near the gingival margin, showing dark brown bands or discontinuous black spots. Often eat dark food, such as cola, chocolate and so on. And if you don't brush your teeth and rinse your mouth in time, it will easily lead to pigment adhering to the tooth surface.
decayed tooth
Tooth decay (dental caries) is due to the decomposition of food by saliva and bacteria in the mouth, which produces a layer of acidic substances and dental plaque attached to the tooth surface and corrodes the outermost enamel of the tooth for a long time.
Enamel dysplasia
In this case, both deciduous teeth and permanent teeth are possible, showing that the enamel is incomplete and not smooth, and there are stripes or holes on it, which may lead to discoloration and coloring of the teeth.