Toothbrush Experts

By Susan Volk, RDH — Last updated August 20, 2026

Short answer: Gum disease starts as gingivitis — inflammation caused by plaque buildup along the gumline — and is fully reversible with better cleaning and a professional cleaning. Left untreated, it can progress to periodontitis, where the infection spreads below the gumline and starts breaking down the bone and connective tissue that hold your teeth in place. That stage isn’t reversible, only manageable, which is why catching it early matters so much.

Stage 1: Gingivitis

Plaque is a sticky film of bacteria that forms on your teeth every day. When it isn’t removed regularly, the bacteria irritate the gum tissue and cause inflammation — that’s gingivitis. The telltale signs are gums that look red or puffy instead of pale pink and firm, and gums that bleed when you brush or floss. A lot of people assume bleeding gums mean they’re brushing too hard and should back off. In most cases it’s the opposite: the gums are inflamed and need more consistent cleaning, not less.

The good news is that gingivitis doesn’t involve any permanent damage yet. With a professional cleaning to remove hardened plaque (tartar) and a more consistent brushing and flossing routine at home, gum tissue typically heals within one to two weeks.

Stage 2: Early Periodontitis

If gingivitis isn’t addressed, the bacteria and the body’s inflammatory response start to affect the structures that anchor your teeth — the periodontal ligament and the bone underneath. This is where the disease crosses into periodontitis, and it’s a meaningful turning point: the tissue and bone lost at this stage do not grow back on their own.

Your hygienist measures this with a periodontal probe, checking the depth of the “pocket” between your tooth and gum at several points around each tooth. Healthy pockets measure around 1–3mm. Once pockets start reading 4mm or deeper, that’s a sign attachment loss has begun.

Stage 3: Moderate to Advanced Periodontitis

As the disease progresses, pockets deepen further, more bone support is lost, and teeth can start to loosen or shift. You might notice teeth look longer than they used to (the gum has receded), spaces opening up between teeth that used to be tight, or a change in how your bite feels. At this stage, treatment usually moves beyond a standard cleaning to scaling and root planing (a deeper cleaning below the gumline, sometimes done in sections with local anesthetic) and, in more advanced cases, referral to a periodontist for surgical treatment.

What Puts You at Higher Risk

Plaque buildup is the trigger, but several things make gum disease more likely or more severe once it starts: smoking or vaping, uncontrolled diabetes, hormonal changes (puberty, pregnancy, menopause), certain medications that reduce saliva flow, and genetics — some people are simply more prone to inflammation than others, even with decent home care.

Frequently Asked Questions

Can gum disease be reversed?

Gingivitis, yes — fully, with a professional cleaning and consistent home care. Periodontitis, no — the bone and attachment loss are permanent, but the disease can be stopped from progressing further with proper treatment and maintenance.

How often should I get a cleaning if I’ve had gum disease?

Many people move from the standard twice-a-year cleaning to a three- or four-month maintenance schedule once periodontitis is diagnosed, since plaque and tartar tend to rebuild faster below the gumline. Your hygienist will recommend an interval based on how your tissue responds.

Does gum disease affect more than my mouth?

Research has found associations between gum disease and several whole-body conditions, including heart disease and diabetes. We cover what that link actually means in our article on oral health and heart health.