Changing of normal oral flora and increasing odds of infection are the results of hyperglycemia and disturbances in healing processes of injured mucous membranes due to hyposalivation, changes in salivary chemical composition, decreased immune function and changes in diet. Oral problems of diabetic patients are xerostomia and subsequent problems such as increased accumulation of plaque and calculi, candidiasis, periodontitis, periapical abscess and burning mouth syndrome, which can influence quality of life of these patients