Clinical surveys suggest around 3 in 10 Australian adults have moderate or severe periodontitis, the advanced form of gum disease, and many do not know it. Gum disease rarely hurts in its early stages, so it often advances quietly until teeth loosen. The good news is that it moves through recognisable stages, and the earliest one is fully reversible.
Key takeaways
- Gum disease has two broad phases: gingivitis (reversible inflammation) and periodontitis (permanent bone and attachment loss).
- Bleeding when you brush or floss is the most common early warning sign, not something to ignore.
- Gingivitis can often be reversed within a few weeks of better cleaning and a professional clean.
- Periodontitis can be controlled and stabilised, but lost bone does not grow back on its own.
- Smoking, diabetes and genetics raise your risk and speed progression.
What causes gum disease
Gum disease starts with dental plaque, a soft film of bacteria that forms on teeth every day. When plaque sits along the gumline, the bacteria irritate the gum tissue and the body responds with inflammation. If plaque is not removed, it hardens into tartar (calculus), a rough deposit that brushing cannot shift and that gives bacteria more places to hide. You can read more about that process in our guide to plaque versus tartar.
Stage 1: Gingivitis
Gingivitis is inflammation of the gums without any loss of the bone that holds teeth in place. Gums may look red or puffy rather than pale pink, and they often bleed during brushing or flossing. There is usually no pain. This stage is important because it is reversible. With thorough daily cleaning and a professional scale and clean, gums can return to health within a few weeks. Persistent bleeding is a red flag worth acting on, as we explain in our guide to bleeding gums.
Stage 2: Early periodontitis
If gingivitis is left untreated, inflammation can spread below the gumline and start to break down the fibres and bone that anchor the tooth. Small pockets form between the gum and tooth, which trap more bacteria. On an X-ray, a dentist may see the first signs of bone loss. At this point the condition has crossed from gingivitis into periodontitis, and the damage that has occurred cannot be fully reversed. It can, however, be halted.
Stage 3: Moderate periodontitis
Pockets deepen, more supporting bone is lost, and gums may begin to recede. You might notice teeth feeling slightly loose, gaps opening up, food packing between teeth, or ongoing bad breath. Treatment usually involves deeper cleaning below the gumline and closer monitoring, sometimes with a dentist and hygienist working together.
Stage 4: Advanced periodontitis
In the advanced stage, substantial bone support is gone. Teeth can become mobile, painful to chew on, or may drift out of position. Some teeth may eventually be lost or need removal. Managing this stage focuses on stabilising what remains, controlling infection, and planning any replacements needed. The cost of gum treatment varies with severity, which is why acting early matters; our overview of gum disease treatment costs explains the general ranges.
How the stages compare
| Stage | What is happening | Reversible? | Common signs |
|---|---|---|---|
| Gingivitis | Gum inflammation only | Yes | Red, puffy gums, bleeding when brushing |
| Early periodontitis | First bone loss, shallow pockets | No, but can be halted | Bleeding, mild pocketing, bad breath |
| Moderate periodontitis | Deeper pockets, gum recession | No | Loose teeth, gaps, food trapping |
| Advanced periodontitis | Major bone loss | No | Mobile or drifting teeth, possible tooth loss |
Why gum disease matters beyond your mouth
Research links moderate to severe gum disease with conditions such as diabetes and heart disease. The relationship runs both ways with diabetes: high blood sugar can worsen gum disease, and gum inflammation can make blood sugar harder to control. Our article on diabetes and gum disease covers this connection in more detail.
Who is most at risk
Anyone can develop gum disease, but the risk is higher for people who smoke, have diabetes, are pregnant, take certain medications that cause dry mouth, or have a family history of gum problems. In my experience, the patients who do best are those who catch it at the gingivitis stage and build a simple daily routine they can actually keep up.
Frequently asked questions
Can gum disease be cured?
Gingivitis can be reversed and effectively cured with good cleaning and a professional clean. Periodontitis cannot be cured in the sense of regrowing lost bone, but it can be controlled and stabilised so it stops getting worse.
Is bleeding when I brush normal?
No. Healthy gums do not routinely bleed. Bleeding is usually the earliest sign of gingivitis and a signal to improve cleaning and see a dentist, not a reason to brush less.
How is the stage of gum disease diagnosed?
A dentist measures the depth of the pockets around each tooth with a small probe and reviews X-rays for bone levels. Together these show whether you have gingivitis or periodontitis and how advanced it is.
Does gum disease always lead to tooth loss?
No. Caught early and managed well, most people keep their teeth. Tooth loss becomes more likely only when advanced periodontitis is left untreated.
What to do next
If your gums bleed, look swollen, or you have noticed teeth shifting, the earlier you have them assessed the more options you have. A checkup can identify which stage you are at and what, if anything, needs doing. You can review current examination and hygiene options on our offers page or book a general checkup to get a clear picture of your gum health.
