By Kelly Shah, Dental Hygienist at The Dental Clinic Portishead

There’s a belief I meet almost every day in the chair: that dentistry ends at the mouth. Teeth and gums up here; the rest of the body, someone else’s department.

I wish more people knew how wrong that is.

Gum disease is a systemic inflammatory condition. In plain English: when your gums are infected and inflamed, billions of bacteria have a direct route from your mouth into your bloodstream — and once they’re in your bloodstream, they can travel anywhere. This isn’t scaremongering; it’s the reason I look at your medical history before I look at your teeth.

The connections that surprise my patients

Your heart. Bacteria from dental plaque can enter the bloodstream through inflamed gums and are linked with increased cardiovascular risk. If you have a heart condition — or you’ve had a heart attack or stents fitted — your gum health genuinely matters more, not less. When I mention this to heart patients, the response is almost always: “Nobody ever told me that.”

Diabetes. Gum disease and diabetes feed each other. Periodontitis can worsen your body’s insulin control, and poorly controlled diabetes makes gum disease harder to fight. I’ve seen how serious this can get first-hand: a close family member of mine, a type 1 diabetic who’d never taken great care of his teeth, once ended up dangerously ill — very nearly in a coma — when oral bacteria entered his bloodstream at a time he’d stopped taking his insulin. That experience is part of why I take this so personally.

Pregnancy. Hormonal changes can make gum disease flare up during pregnancy, and if oral bacteria enter the bloodstream they can affect the placenta — which is linked with a higher rate of preterm births and can trigger early labour. If you’re pregnant or planning to be, a hygiene check is one of the simplest protective steps you can take.

Your brain. Research has linked the bacteria and toxins involved in gum disease with Alzheimer’s disease. This one I’ve seen up close: before joining the practice, I briefly worked with a clinical trials team at a dental hospital around 2017–18 on research into exactly this connection — how the bacteria in your mouth may play a role in Alzheimer’s.

Your lungs. Oral bacteria can be drawn into the airways, where they can increase the risk of pneumonia — particularly important for older patients and anyone with existing lung conditions.

Your joints. In conditions like rheumatoid arthritis and osteoporosis, oral bacteria can trigger the autoimmune antibodies involved — another pathway we’re only beginning to fully appreciate.

What actually happens when hygiene slips

Everyone has bacteria in their mouth — good and bad — and healthy mouths keep them in balance. When brushing slips, the bad bacteria multiply, and plaque forms faster from the mix of bacteria, saliva and food debris left behind.

Here’s the part that shocks people: skip brushing just once — say, after a late-night sandwich — and within around 24 hours that soft plaque can start hardening like cement into calculus. At that point you cannot brush it off. Only a hygienist can remove it, manually. One skipped brush genuinely can leave a permanent squatter on your teeth.

Left alone, that build-up inflames the gums (gingivitis — reversible, and extremely common), and can progress to periodontitis, where the bone holding your teeth is permanently destroyed. And as we’ve seen, the trouble doesn’t stop at your gum line.

If you have one of these conditions, here’s my advice

You don’t need to panic — you need to be self-aware. If you have a heart condition, diabetes, a lung or joint condition, or you’re pregnant, tell us. It changes how we care for you.

Even if your gum scores look fine, I’ll sometimes recommend more frequent hygiene visits — every three months rather than once a year — because with certain medical conditions, “could be better” oral hygiene carries higher stakes. Many of our patients in this position join one of our dental plans, which makes regular appointments far more affordable.

In my experience, once patients understand the connection, they don’t need convincing. They make the decision themselves.

Your mouth is the front door to your body. Let’s keep it healthy.

Book a hygiene appointment with Kelly at The Dental Clinic Portishead — call the practice or book online.