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10th Sep 2026 published by: Dr. Patrick Ryan
By Symmetry Dental | Kingston, Canberra
If you have watched a parent or grandparent begin to lose their words, or noticed your own memory feeling slower than it used to, you have probably wondered what is within your control. It is one of the most common worries people raise with us, usually quietly, near the end of an appointment.
Over the past decade, researchers have been taking a serious look at something that sounds unlikely at first: the connection between the health of your gums and the health of your brain. It is an interesting area of science, and one where the headlines tend to run further than the evidence.
At Symmetry Dental in Kingston, our team looks at the mouth as part of the whole person. We pay attention to your gums, your bite, your breathing and your sleep, because these things are connected in ways many people have never had a dentist explain to them. Here is what the research is currently saying, and what it reasonably means for you.
Scientists have found a consistent association between gum disease and Alzheimer's disease, but association is not the same thing as cause. People with long-standing gum infections appear more likely to experience cognitive decline, and greater tooth loss tends to track with poorer memory function. Reviews describe the link as plausible and worth investigating, not as settled fact.
Researchers have proposed two main explanations. One is inflammation: advanced gum disease, known as periodontitis, is a chronic low-grade infection, and the inflammatory signals it produces do not stay politely in the mouth. The other is bacteria. A gum bacterium called Porphyromonas gingivalis has been detected in the brain tissue of people who had Alzheimer's disease, which raised a great deal of interest and a great deal of debate.
The relationship may also run in both directions. As memory and dexterity decline, brushing and flossing become harder to keep up, which allows gum disease to progress. Untangling which came first is one reason this question is taking so long to answer.
Nobody can currently say that treating gum disease prevents Alzheimer's disease, and we would be uncomfortable with any practice that suggested otherwise. What we can say is that healthy gums are worth having for well established reasons, and brain health may turn out to be one more of them.
Gum disease is common and remarkably quiet in its early stages, because it rarely hurts until it is well advanced. That is part of why regular check-ups matter more than they might seem to.
Signs worth mentioning to your clinician include:
Chronic gum inflammation has already been associated with heart disease and with poorer blood sugar control in diabetes, so the idea that it might also matter for the brain fits a pattern researchers have been building for years. Our three oral health therapists spend much of their week on this work.
There is a second thread in this research, and it is the one our patients least expect a dental practice to raise.
Obstructive sleep apnoea is a condition where the airway, meaning the passage you breathe through, narrows or closes repeatedly during sleep. Large reviews of long-term studies have found that people with sleep apnoea are more likely to develop dementia, including Alzheimer's disease, than people without it. Disrupted sleep and repeated dips in oxygen overnight may be part of the reason, though here too the picture is still being worked out.
This matters in a dental practice because the shape and growth of the jaws can influence how much room there is for air to move. Dr Patrick Ryan is a dentist with a Masters in Sleep Medicine from Sydney University, and he provides orthodontic treatment using an airway-first approach: considering how the jaws, the tongue and the airway work together, rather than looking only at how straight the teeth appear. For children, this sits alongside Guided Growth orthodontics, which works with a child's natural jaw development while it is still happening.
Snoring most nights, waking unrefreshed, morning headaches, ongoing clenching or grinding, and a child who habitually breathes through their mouth are all worth mentioning. None of them diagnoses anything on its own. They simply give us somewhere sensible to start looking, and where appropriate we work with sleep physicians and ENT specialists.
The reassuring part of all this research is that the practical advice has not changed. It is the same care that protects your teeth and gums for ordinary reasons, done consistently.
Our clinic on Jardine Street in Kingston uses low dose digital x-rays and intraoral cameras, so changes can be picked up early and shown to you clearly. We care for patients from Kingston, Manuka, Barton, Griffith and Narrabundah, as well as Tuggeranong, Woden, Belconnen, Gungahlin, the broader ACT and Queanbeyan in NSW.
If you are caring for someone living with dementia, daily oral care can become one more difficult task in a long day. Reduced saliva from medications, changed eating habits and difficulty managing dentures are all common, and they can lead to decay quite quickly. Tell us what is happening at home so appointments can be shorter, gentler and planned around the person you are supporting.
Sometimes an issue in the mouth needs a closer look than a routine check-up allows, such as an ulcer that will not heal, an unexplained patch or ongoing oral discomfort. Dr Joseph Ryan is an Oral Medicine Specialist based here in Kingston, which means many people no longer need to travel to Sydney or Melbourne for specialist oral medical care. We welcome referrals from GPs and other dentists across the ACT and Queanbeyan. Alongside him, Dr Robert Waites is a general dentist with a strong focus on restorative dentistry, the work of repairing and protecting teeth.
Can gum disease cause Alzheimer's disease? Current research shows an association, not a proven cause. Scientists are still investigating whether inflammation and oral bacteria contribute to changes in the brain, and more evidence is needed before anyone can answer this confidently.
Does looking after my teeth reduce my risk of dementia? Good oral care is worthwhile for many reasons, but it cannot be presented as a way to prevent dementia. Think of it as one sensible part of looking after yourself rather than a guarantee of anything.
Is snoring something a dentist should know about? Yes. Snoring can be harmless, but it can also be a sign of disrupted breathing during sleep, and the structure of the jaws and airway is something a dentist is well placed to assess and refer on where needed.
If anything here has raised a question about your gums or your sleep, we would be glad to talk it through properly rather than in the last two minutes of an appointment. You can book a consultation at our Kingston clinic through symmetrydental.com.au or by calling our friendly team.
If you are a GP or another dentist, we welcome referrals for Oral Medicine care from across the ACT and Queanbeyan. And if you have been wondering about your child's breathing or sleep, early assessments are available and parents are always welcome to enquire.
