02/06/2026
Diabetes and periodontitis can feed each other.
High glucose can change the periodontal battlefield: advanced glycation end products, oxidative stress, impaired neutrophil function, delayed collagen repair, and a stronger inflammatory response.
Then the loop can run in the other direction. A deep inflamed periodontal pocket can add inflammatory mediators to the bloodstream and make glycaemic control harder.
This is why the EFP and International Diabetes Federation describe diabetes and periodontitis as linked chronic diseases. It is also why Cochrane found that periodontal treatment can improve HbA1c in people with diabetes and periodontitis.
But here is the honest truth: periodontal treatment does not cure diabetes. Medication, diet, movement, smoking, body weight, access to care, and medical follow-up still matter.
The best message is collaboration.
If your patient has diabetes, the mouth belongs in metabolic care.
Credit: and for the joint perio-diabetes consensus work.