It is estimated that up to 20 million people have diabetes, but only two-thirds of these individuals are diagnosed. Studies have shown that diabetics are more susceptible to the development of oral infections and periodontal (gum) disease than those who do not have diabetes. Oral infections tend to be more severe in diabetic patients than non-diabetic patients. And, diabetics who do not have good control over their blood sugar levels tend to have more oral health problems. These infections occur more often after puberty and in aging patients.

Because diabetes reduces the body's resistance to infection, the gums are at risk for gingivitis, an inflammation usually caused by the presence of bacteria in plaque. Plaque is the sticky film that accumulates on teeth both above and below the gum line. Without regular dental check-ups, gum disease may result if gingivitis is left untreated. It also can cause inflammation and destruction of tissues surrounding and supporting teeth, gums, bone and fibers that hold the gums to the teeth.