![shutterstock_138231533](https://www.nationalelfservice.net/cms/wp-content/uploads/2014/08/shutterstock_138231533-150x150.jpg)
This update of a 2010 Cochrane review found low quality evidence that periodontal treatment involving scaling and root planing does improve glycaemic control in people with diabetes, with a mean percentage reduction in HbA1c of 0.29% at 3-4 months, but there is insufficient evidence to demonstrate that this is maintained after 4 months.
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