Dr. Phillips went as far as stating that, “The truth of the matter is that brushing and flossing causes periodontal disease.” As time goes on, Dr. Phillips believed that more brushing and flossing causes more gum disease. This is because the normal motion of tooth brushing concentrates the tooth tartar at the gum line where it is left to fester. The gum line area known as the gingival sulcus is always the dirtiest after brushing.11