Background: Dental implant survival is initially dependent on successful osseointegration following placement. Any alteration of this biological process by excessive surgical trauma, infection, or metabolic upset may adversely affect treatment outcomes. Diabetes is a chronic disease that occurs when the pancreas does not produce enough insulin or when the body cannot effectively use the insulin that it produces. The number of people with diabetes increased from 153 million (95% uncertainty interval = 127, 182) in 1980 to 347 million. Aim of the study: To study Prognosis of dental implants in diabetic patients. Materials and methods: The present study was conducted in the Department of Periodontics of the Dental institution. For the study, we selected participants with poorly-controlled type 2 diabetes mellitus that received dental implants as part of a randomized comparative study of implant surfaces. A total of 30 patients were included in the study population. Participants were prescribed antibiotics for one week post-surgically, analgesics given as required and chlorhexidine-digluconate 0.12% oral rinse (Peridex®) for 7–14 days. After a minimum of 16 weeks of healing, the participants received implant-supported fixed dental prostheses. Participants were seen 13 to 16 months after implant placement to evaluate implant complications and HbA1c levels, and were then recalled for a long-term follow up which occurred between 21 and 34 months post-surgery to assess implant survival and success by a single examiner. Results: The number of implants evaluated was 60. Table 1 shows the implant survival rate over a follow up period of 2 years. We observed that diabetic patients have high probability of implant failure. The number of failed implants increased with elevated HbA1c %. The results were found to be statistically significant. Conclusion: Within the limitations of the present study, it can be concluded that poorly controlled diabetes mellitus can lead to poor dental implant health and implant failure within a short period of time. Keywords: Diabetes mellitus, implant, dental implant, HbA1c