Effect of periodontal treatment on glycated haemoglobin and metabolic syndrome parameters: A randomized clinical trial.

AIM: To assess the effect of periodontal treatment on HbA1c and diagnostic parameters of patients with metabolic syndrome (MetS). MATERIALS AND METHODS: One hundred and fifty-eight patients with MetS and moderate and severe periodontitis were included. They were randomized into a test group (n = 79), which received non-surgical periodontal treatment, and a control group (n = 79), which received no treatment. Medical treatment was delivered to both groups. Clinical periodontal, anthropometric and serological parameters were assessed at baseline, 3 and 6 months. The main outcome was glycated haemoglobin (HbA1c) levels, and the secondary outcomes were changes in the MetS parameters, C-reactive protein (CRP) and HOMA indexes. RESULTS: Significant reductions in all periodontal parameters were observed in the test group, compared with the control group, at 3 and 6 months (p < .001). HbA1c levels, MetS parameters, CRP and HOMA indexes showed no significant differences between the test group and the control group at 3 and 6 months. CONCLUSIONS: Periodontal treatment led to a substantial reduction in periodontal inflammation, although there was no significant effect on the parameters used for MetS diagnosis in patients with early diagnosed and well-controlled MetS.