Prophylaxis is a procedure where a dentist or dental hygienist removes plaque and tartar from the teeth. This will make the gums and teeth healthier. It is not uncommon for patients to note that teeth appear slightly more sensitive after a dental cleaning. The reason for this is that plaque and tartar coat the tooth surface and shield them from substances in the mouth. Once they are removed a transient sensitivity may occur but soon leaves. It is important for one to brush and floss after every meal to prevent build-up of plaque and tartar.