From our Dental Elf: evidence of improved metabolic control in type 2 diabetes after treating periodontal disease

Dental examination

Clinical question:

In type 2 diabetes, does non-surgical treatment of periodontal disease lead to improved glycaemic control?


An updated systematic review of randomised trials.


The review concluded there was evidence of a small reduction in HbA1c after treatment for gum disease.  However, the studies were of poor quality with some evidence of publication bias, so more research is needed to confirm this benefit.  In particular, we need studies with larger sample populations studied for a longer period.