Abstract Background: Diabetes Mellitus (DM) is a serious meta-bolic syndrome with its two basic types resulting in abnormal fat, carbohydrate, and protein metabolism. Periodontal disease is considered as the sixth leading complication for individuals suffering from diabetes mellitus. Periodontal disease can be initiated, developed and progressed because of metabolic imbalances in the tissues which lower the diabetic patients resistance of diabetics to infection. Aim of Study: The aim of this study was tostudy periodontal disease experience in a group of diabetic children and the unmet treatment needs. 3 to 12 years old suffering from type 1 diabetes mellitus. Material and Methods: 91children with type 1 diabetes mellites, their ages range from 3 to 12 participated in the study with the mean time since the onset of diabetes was 5.41±3.13 years in boys and 4.88±2.29 years in girls. Results: There was a significant differencecorrelation between HbA1c and periodontitis and diabetic ketoacidosis attacks. Conclusion: Elevated blood glucose levels in patients with diabetes mellitus patients is prominently associated with periodontal disease in the form of periodontitis and xerostomia leading to high risk of ketoacidosis attacks.