为什么很多人的牙齿会变黄,甚至变黑呢?根据病因的不同,牙齿变色可以分为内源性着色和外源性着色。内源性着色牙,指的是由于受到病变或药物的影响,牙齿内部结构发生的着色,常伴有牙齿的发育异常;而外源性着色牙,主要指由于药物、食物、饮料(如茶、咖啡等)中的色素沉积在牙齿表面,而牙齿内部结构并不受影响。 Why do many people’s teeth turn yellow, or even darken? According to the different causes, tooth discoloration can be divided into endogenous coloring and exogenous coloring. Endogenous stained teeth, refers to the affected by lesions or drugs, the internal structure of the tooth color, often accompanied by tooth developmental abnormalities; and exogenous colored teeth, mainly refers to the drug, food, beverage (such as tea , Coffee, etc.) is deposited on the tooth surface, while the internal structure of the tooth is not affected.