Hamadan University of Medical Sciences Avicenna Journal of Dental Research 2423-7582 15 4 2023 12 29 Evaluation of Oral Complications, Oral Health, and Decayed, Missing, and Filled Teeth in Diabetic Patients: A Retrospective Cohort Study 150 155 10.34172/ajdr.1737 EN Shima Fathi https://orcid.org/0000-0001-9290-9315 Shiva Borzooei Fatemeh Abbasi Jalal Poorolajal Fatemeh Ahmadi-Motamayel https://orcid.org/0000-0002-7138-7690 Journal Article 10.34172/ajdr.1737 2023 06 24 2023 09 04 Background: The aim of this study was to determine the presence of oral lesions and complications, caries, and oral hygiene status in patients with diabetes mellitus type 1 and 2, and gestational diabetes (GDM). Methods: The plaque index of each patient was recorded using the Silness-Löe index. Dental health status was observed using the decayed, missing, and filled teeth (DMFT) index. The patient’s mouth was examined clinically for oral lesions and complications. Results: There were significant differences between the study groups with regard to age, duration of diabetes, DMFT index, oral lesions, and hygiene status. Conclusion: According to the result of this study, the rate of dental caries, oral complications such as xerostomia, and burning mouth in patients with diabetes is higher than in healthy people.