A recent study reported on in the journal Evidence-Based Dentistry, talked about how good oral hygiene and regular dental care might help in controlling blood sugar levels in diabetes generally.
That's what researchers in the Department of Dentistry, Toulouse University Hospital and Toulouse Dental School, Paul Sabatier University in Toulouse, France, found when they put together three earlier studies on treating periodontitis in diabetics.
The three studies taken from the literature were pooled and analysed as if they were one large study.
It was found that diabetics with periodontitis lowered their HbA1c levels over a period of 3 to 4 months when they had regular deep cleanings, followed regular oral hygiene and, in some cases, took antibiotics, compared with control groups of diabetics whose periodontitis was treated only with the usual care for 3 to 4 months.
Most of the participants had Type 2 diabetes.
Although it was concluded more research on treating periodontitis and controlling Type 2 diabetes should be performed before any definite conclusions are reached...
it seems curing peridontitis is a worthy goal in itself.
What is Peridontitis? Periodontitis is the serious and advanced stage of gum disease and can include the loss of bone.
Unfortunately periodontitis:

• is irreversible...
  gum tissue and the bone surrounding your teeth can become seriously damaged and could result in loss of those affected teeth
• occurs when gingivitis, the early stage of periodontal disease, is not treated
• is inflammation of the tissue around the teeth...
  usually there is no pain in the gums.
  Often it is not noticed until you find blood on your toothbrush after cleaning your teeth.
  

Gingivitis:

• about 80% of adults in the United States experience gingivitis, a milder form of inflammation of the gums
• is the initial stage of gum disease and is the easiest to treat
• the cause of gingivitis is plaque which is the film of bacteria that constantly forms on your teeth and gums
• if it is allowed to continue, gingivitis leads to periodontitis when the gums pull away from the teeth and pockets of infection are formed

Periodontal disease occurs more frequently in people who have diabetes, as well as in older people in general:

• about 80% of older adults have it
• the worst cases are treated with oral surgery, followed by regular deep cleanings
• if untreated periodontal disease results in bone erosion and eventually loss of teeth
• makes dealing with diabetes much more difficult

Diabetics are particularly susceptible to all kinds of infection, and the tissue supporting your teeth is no exception.
Infections in your mouth aggravates your blood sugar levels, causing them to rise.
Having periodontal disease treated will help to control gum disease as will maintaining your blood sugar levels in your ideal range.
Brushing your teeth twice daily, plus flossing regularly, and avoiding sugary foods will also help control gum disease.