An oral treatment device for treating gingival hyperpigmentation including an applicator configured to accommodate at least one dental arcade and gingival tissue associated therewith, having a plurality of voltage to gingiva RF voltage-applying elements arranged in a matrix on one or more walls of the applicator and configured to apply to the gingiva ablative voltage and deepithelialize the gingival tissue. The voltage to gingiva RF voltage-applying elements are also configured to apply to the gingiva tissue, deep to the epithelium layer, sublative RF voltage configured to stimulate gingiva blood circulation and retard and sometimes even stop progression of gum recession.
