Whitening gum in the early days that have many efforts to resolve the pigment the gum. The pigment in the skin that shallow. Such as the use of chemical pigment from gill Ltd, causing a wound superficial.Or use the head to wait, grind out, which will make the gum pain and bleeding. As well as the depth control of the wound can be quite difficult. Another method is used in the gums from other areas and on the gums, headlandBut such methods have disadvantages is a pain in the wound, and the color of the gum, the ceiling is light pink than gum front visualize color harmony while smile
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