There is low quality evidence that the treatment of periodontal disease by SRP does improve glycaemic control in people with diabetes, with a mean percentage reduction in HbA1c of 0.29% at 3-4 months; however, there is insufficient evidence to demonstrate that this is maintained after 4 months.There was no evidence to support that one periodontal therapy was more effective than another in improving glycaemic control in people with diabetes mellitus.In clinical practice, ongoing professional periodontal treatment will be required to maintain clinical improvements beyond 6 months. Further research is required to determine whether adjunctive drug therapies should be used with periodontal treatment. Future RCTs should evaluate this, provide longer follow-up periods, and consider the inclusion of a third 'no treatment' control arm.Larger, well conducted and clearly reported studies are needed in order to understand the potential of periodontal treatment to improve glycaemic control among people with diabetes mellitus. In addition, it will be important in future studies that the intervention is effective in reducing periodontal inflammation and maintaining it at lowered levels throughout the period of observation.

Analysis 7.1. Comparison 7 Physical barriers vs. placebo, Outcome 1 Symptom relief-short-term (≤3 months).. . Analysis 7.2. Comparison 7 Physical barriers vs. placebo, Outcome 2 Change in QoL-short-term (≤3 months).. . Analysis 8.1. Comparison 8 Psychological therapies vs. placebo, Outcome 1 Symptom relief-long-term (>3-≤6 months

Treatment of periodontitis for glycaemic control in people with diabetes mellitus (Review)