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Purpose: There are numerous studies available with different findings on the prognosis of implant therapy in individuals with periodontal disease. The aim of this study is to detect the success of the implant in the average 29 months of follow-up in patients with periodontal disease history and in periodontal-healthy individuals and to compare the loss of the bone tissue around the implant according to the patient-related parameters such as smoking, age, gender and diabetes mellitus (DM). In this study, a total of 139 implants were placed on 14 periodontally healthy individuals and 12 patients with periodontal history of disease. All implants were charged after 8-10 weeks of healing process. Marginal bone loss around the implants was measured after the beginning and an average of 29 months. Implant success was assessed in patients with a periodontal history of disease and in periodontally healthy individuals. The loss of bone tissue between the two patient groups was compared according to the patient-related parameters. Results: Smoking use and DM; implant environment has statistically significantly affected marginal bone loss in both patients groups (p≤ 0,05). In the group of individuals with periodontal disease, the marginal bone loss values in female patients are lower than in male patients. In the group of healthy individuals, the average bone loss during the follow-up period is higher than the average bone loss during the follow-up period. However, this difference in both groups was not statistically significant (p≥ 0.05). The average bone loss values during the tracking period were less found in young individuals in both groups, compared to middle and older individuals. However, this difference has not been statistically meaningful (p≥ 0.05). The 29-month average success rate in the study was found in all implants, in individuals with Periodontal disease and in groups of healthy individuals, respectively; 95, 93,8% and 96,6% respectively. The effect of diabetes and smoking on marginal bone loss during the follow-up period of the implants is obvious. Environmental marginal bone loss has shown a statistically significant increase in individuals with periodontal disease history, compared to periodontally healthy individuals. In this regard, in individuals with periodontal disease history, the secondary failure factors in implant therapy should be carefully evaluated. Keywords: Periodontitis, Dental Implant, Diabetes THE SUCCESS RATES OF IMPLANTS IN PERIODONTALLY COMPROMISED AND PERIODONTALLY HEALTHY PATIENTS- A 29 MONTHS RETROSPECTIVE EVALUATION ABSTRACT Aim: The aim of this study is the evaluation of the success rate of implants in periodontally compromised and periodontally healthy patients in average 29 months follow-up time. And comparison of the marginal bone loss around implants according to patient related parameters as smoking, age, gender and diabetes mellitus. Materials and Methods: One hundred and thirty nine implants were placed in 14 periodontally healthy and 12 periodontally compromised patients and loaded with final restorations 8-10 weeks of healing time. Marginal bone loss around implants was determined radiographically at initial and after an average observation time average of 29 months. The smoking habit, Diabetes Mellitus, age and gender on the marginal bone loss was evaluated. Results: Marginal bone loss was affected statistically significantly by smoking and DM, in both groups (p≤ 0,05). In the PHB group marginal bone loss was found higher for men, in the PSB group marginal bone loss was found higher for women but for both of the groups these differences were not statistically significant (p≥ 0.05). Also in both of the groups age was not the decisive factor for marginal bone loss. The overall cumulative survival rate for 29 months was 95 % and for PHB and PSB groups consecutive, 93.8, 96.6 %. The impact of smoking and DM is obvious for the marginal bone loss for both of the groups. And for periodontally compromised patients bone loss increases statistically significantly higher in comparison to healthy patients. During the implant treatment, for periodontally compromised patients secondary factors must be followed carefully. Key words: Diabetes mellitus, Dental implant, Diabetes mellitus

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