Objective: To evaluate the metabolic control and compare the clinical effects between non-surgical and surgical therapies on periodontal treatment of residual pockets of type 2 diabetic patients. Material and Methods: 352 periodontal sites in 16 type 2 diabetic subjects with residual pockets of similar depths were randomly selected, whose contralateral quadrants were divided into G1 and G2 undergoing surgical and nonsurgical therapy, respectively, and evaluated 3 and 6 months after the first intervention. The data were analyzed by Statistical Package of Social Science (SPSS) version 20.0, using descriptive and inferential statistical methods. Fisher's exact test was used to verify differences between means obtained in the clinical parameters between G1 and G2. The significance level adopted was 5%. Results: The mean Hb1Ac values of patients were significantly reduced and the mean PD and CIL values were reduced in G1 with no significant difference when compared to G2. Conclusion: Periodontal treatment was effective in metabolic control of type 2 diabetic patients and that both therapies, surgical and non-surgical, behaved similarly when compared.

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