Background: The prognostic of replanted teeth is related with integrality of cement periodontal ligament and of cement layer. This cement layer is influenced by many factors, principally the extra- alveolar period and storage local. However, there’re doubts if systemic alterations like diabetes can interfere on healing process of tooth replantation too. Objective: The aim of this study was evaluate the healing process of immediate replantation of incisors of non-controlled diabetic rats. Study Design: It were used 32 rats, divided in two groups with 16 animals each group. Group I received citrate buffer intravenously. In animals of Group II was inoculated streptozotocin dissolved in citrate buffer intravenously with intention to induce diabetes. After blood glucose control the teeth were extracted and replanted immediately in their respective alveolus. Systemic antibiotic therapy started in immediate post operatory period. After 10 at 60 days of replantation, it was executed the euthanasia of animals and parts of body were submitted at laboratorial processing to obtain the cuts. These cuts were dyed with hematoxylin-eosin and trichromium of Masson for histological and histometric analysis. Results: Quantitative results at 60th day demonstrated that similar indexes of external root resorption and ankylosis were found in both groups. Conclusion: It was possible to conclude that alveolar healing process of tooth immediate replantation in diabetic rats occurred satisfactorily although connective tissue in periodontal ligament showed itself less organized in diabetic group when compared with animal of control group during all the studied periods.
