Most people who go to the hospital to whiten their teeth still don't know why they are so yellow or so black, such as tetracycline teeth. Some people only know how to whiten their teeth after going to the hospital, but they don't know what made her grow a tetracycline tooth. What are tetracycline teeth? What caused your tetracycline teeth? The dentist in Wuhan Aicher said that tetracycline teeth caused pigment teeth by tetracycline. Tetracycline teeth are mainly caused by children taking tetracycline drugs during teething, which makes teeth yellow, brown or even gray-black. Tetracycline tooth is one of the most serious pigment teeth, which does great damage to personal external image. According to Dr. aitel, the causes and effects of tetracycline tooth formation are as follows: 1. The color of tetracycline drugs, such as norchlortetracycline is cadmium yellow and oxytetracycline is lemon yellow. Causes of tetracycline teeth II. Color degradation of tetracycline. Because tetracycline is sensitive to light, it will change color under ultraviolet light or sunlight. Causes of tetracycline teeth 3. Tetracycline in dentin has different degrees of dentin staining due to the depth of the binding site. The closer the ribbon is to the enamel dentin boundary, the easier it is to color. Therefore, in the early infancy, when the outer dentin is formed, drug treatment has the greatest influence.