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          牙齒發黃總是牙垢使然嗎?亦可能是遺傳

          牙齒發黃總是牙垢使然嗎?亦可能是遺傳

          造成牙齒變黃的原因主要有兩大類:外在的和內在的。這可能是由一系列因素引起的,如藥物使用和清潔不足。外在污漬影響的是牙釉質表面,牙釉質是牙齒表面最堅硬的,是牙齒的最外層。雖然牙釉質很容易被沾上污垢,但這...

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