Non-Surgical Periodontal Treatment (NSPT) is the first recommended approach to prevent periodontal infections. This study aimed to compare the HbA1c level in non-diabetic people with chronic periodontitis with people with healthy periodontium tissue. Also, in this study, the impact of NSPT on the blood sugar control of non-diabetic patients with chronic periodontitis was investigated. In this clinical trial study, patients were divided into two control and intervention groups. The intervention group included 20 non-diabetic patients with chronic periodontitis, and the control group contained 20 non-diabetic patients with healthy periodontitis. Periodontal clinical parameters included: Clinical attachment loss (CAL), Gingival index (GI), Probing pocket depth (PPD), and HbA1c. NSPT was performed for the intervention group. After three months, periodontal clinical parameters and HbA1c were measured and compared with the initial results. Before non-surgical periodontal treatment, the level of HbA1c in the intervention group was higher than in the control group (P < 0.001). In the group of intervention, there was a significant difference in HbA1c levels before and after treatment of non-surgical periodontal (P < 0.001). While in the control group, the HbA1c level before and after does not show a significant difference (P > 0.001). This study found that chronic periodontitis can affect blood sugar control in healthy individuals. Non-surgical periodontal treatment improves periodontal tissue health and lowers HbA1c levels.
