Gum disease usually progresses through recognisable stages, starting with gingivitis (inflamed, bleeding gums) and, if it isn’t managed, moving on to periodontitis, where the bone and fibres holding the teeth in place are gradually lost. The key point about the gum disease stages is that gingivitis is generally reversible with good cleaning, while the damage from periodontitis can be controlled but usually not fully undone. Catching it early makes a real difference.
What gum disease is and why it develops
Plaque is a soft, sticky film of bacteria that forms on teeth every day. If it isn’t removed by brushing and cleaning between the teeth, it irritates the gums and triggers inflammation. Over time plaque can harden into calculus (tartar), which you can’t remove with a toothbrush and which gives bacteria a rough surface to cling to.
In some people, the body’s inflammatory response to these bacteria starts to break down the tissues that support the teeth. How quickly this happens varies a great deal from person to person, which is why two people with similar habits can have very different gum health.
Factors that increase the risk
- Smoking or vaping, which is one of the strongest risk factors and can also mask bleeding
- Diabetes, particularly when blood sugar is not well controlled
- A family history of gum disease
- Hormonal changes, such as during pregnancy
- Some medications that cause dry mouth or gum overgrowth
- Stress and conditions that affect the immune system
- Crowded teeth or overhanging fillings that make cleaning difficult
Stage 1: Gingivitis
Gingivitis is inflammation of the gums only. The bone and connective fibres that anchor the teeth are not yet affected. It is very common, and many adults have some gingivitis at some point.
Typical signs
- Gums that bleed when you brush or floss
- Red, puffy or tender gums rather than firm and pale pink
- Bad breath that keeps coming back
Gingivitis often doesn’t hurt, which is why it is easy to ignore. Many people stop flossing because their gums bleed, but the bleeding is usually a sign that the area needs more gentle, regular cleaning rather than less.
Can it be reversed?
Generally, yes. With thorough daily brushing and cleaning between teeth, plus a professional clean to remove calculus, inflamed gums usually settle within a couple of weeks. A professional dental cleaning removes the hardened deposits that home care can’t shift.
Stage 2: Early periodontitis
When inflammation continues, it can spread below the gum line. The attachment between gum and tooth starts to break down and a small gap, called a periodontal pocket, forms. Bacteria collect in the pocket where a toothbrush can’t reach, and the early loss of bone begins.
At this stage you may notice much the same signs as gingivitis, perhaps with slightly more persistent bleeding or bad breath. Some people notice nothing at all. Your dentist detects early periodontitis by gently measuring the depth of the space around each tooth with a fine probe and by checking bone levels on x-rays.
Stage 3: Moderate periodontitis
As pockets deepen and more bone is lost, signs become harder to miss:
- Gums that have shrunk back, making teeth look longer
- Gaps appearing between teeth, especially near the gum line
- Sensitivity on exposed root surfaces
- Pus around the gums or a recurring bad taste
- Food packing between teeth more than it used to
Treatment at this stage aims to stop further loss and keep the teeth healthy for as long as possible. Bone that has been lost generally does not grow back on its own.
Stage 4: Advanced periodontitis
In advanced disease, a large amount of supporting bone has been lost. Teeth may become loose, drift out of position, or change the way your bite fits together. Chewing can become uncomfortable, and some teeth may be lost or need removal. Gum abscesses are more likely at this stage.
Even here, treatment can often help keep remaining teeth functional, although the outlook depends on how much support is left and on risk factors such as smoking and diabetes. Complex cases may be referred to a specialist periodontist.
A note on how dentists classify gum disease
Since 2017, dentists have used an international classification that describes periodontitis in four stages (I to IV) based on severity and complexity, and three grades (A to C) based on how quickly it is likely to progress. You don’t need to know the details, but if your dentist mentions a stage and grade, this is what it refers to. The simpler descriptions above are a good guide to what each level means for you.
How gum disease is treated at each stage
Gingivitis
A professional scale and clean, plus coaching on brushing and cleaning between teeth with floss or interdental brushes. Your dentist may suggest a review to check the gums have settled.
Periodontitis
The core treatment is a deep clean below the gum line, often called scaling and root planing or root surface debridement. This removes plaque and calculus from the root surfaces inside the pockets so the gums can tighten up. It is usually done under local anaesthetic and may be spread over more than one appointment.
Afterwards, gums can feel tender for a few days and teeth may be more sensitive as inflammation settles and the gums shrink slightly. Some people notice small gaps that were previously hidden by swollen gums. These are normal effects of healing, but it is worth knowing about them in advance.
Ongoing maintenance
Periodontitis is a chronic condition. After active treatment, regular maintenance visits, often every three to six months depending on your risk, help keep it stable. Managing risk factors matters too: quitting smoking and keeping diabetes well controlled both make treatment more effective. Results vary, and some sites may need further treatment or referral.
Gum disease and your general health
Research has found associations between periodontitis and conditions such as diabetes and cardiovascular disease. The link with diabetes appears to work both ways: poorly controlled diabetes worsens gum disease, and treating gum disease may modestly help blood sugar control. For heart disease, an association has been observed, but it has not been shown that gum disease directly causes it. Either way, healthy gums are a sensible part of looking after your overall health.
Preventing gum disease
- Brush twice a day for two minutes with a soft brush and fluoride toothpaste, angling the bristles towards the gum line.
- Clean between your teeth once a day with floss or interdental brushes.
- Don’t smoke or vape.
- Have regular check-ups and cleans so early changes are picked up.
- Tell your dentist about medical conditions, medications and pregnancy, as these can affect your gums.
Our page on preventive dentistry covers the everyday habits and regular care that help keep gums healthy over the long term.
When to see a dentist
Make an appointment if your gums bleed regularly, look red or swollen, have pulled back from your teeth, or if you notice loose teeth, a change in your bite, persistent bad breath or pus around the gums. If you have diabetes, smoke, are pregnant or have a family history of gum disease, regular gum checks are especially worthwhile. At North Ryde Dentistry, a check-up includes an assessment of your gums as well as your teeth.
Frequently asked questions
Is gingivitis reversible?
Generally, yes. Gingivitis affects only the gums, and with a professional clean and good daily brushing and cleaning between teeth, inflamed gums usually settle within a couple of weeks.
Can periodontitis be cured?
Periodontitis can usually be controlled but not fully reversed, because lost bone generally does not grow back on its own. With treatment and regular maintenance, many people keep their teeth stable for many years.
Why do my gums bleed when I floss?
Bleeding is usually a sign of gum inflammation caused by plaque. Gentle, regular cleaning often reduces the bleeding within a week or two. If it continues, see your dentist to check for gum disease.
Does gum disease treatment hurt?
Deep cleaning is usually done under local anaesthetic to keep you comfortable. Gums may feel tender and teeth more sensitive for a few days afterwards, which usually settles as the gums heal.
How often should I have my gums checked?
Many people have a check-up and clean every six to twelve months, but people with periodontitis or higher risk often need maintenance visits every three to six months. Your dentist will recommend an interval for you.
If your gums bleed or you have noticed changes, a check-up at our Macquarie Park practice is a good first step. Call North Ryde Dentistry on (02) 8090 1102 or book an appointment.
This article is general information only and is not a substitute for advice from your own dentist. Any treatment carries risks; your dentist will discuss whether it is suitable for you.
Related at North Ryde Dentistry: our North Ryde dental clinic