Buy the hy g toothbrush with a set of replacement heads and save 2 hy g is an ionic toothbbrush which attracts plaque like a magnet the hy g ionic is clinically proven by studies at universities in the usa and japan to remove plaque up to 48 more effectively than ordinary manual brushing iontophoretic action improves the effectiveness of fluoride in toothpaste helping to reduce hypersensivity in teeth plaque is difficult to remove because it has a positive polarity while teeth hav