Gum disease: the signs, the stages, and the treatment that actually works
Gum disease is the most common serious problem in adult mouths, and the least noticed, because it rarely hurts until late. Here's how to recognize it, what your dentist's “Stage III, Grade B” actually means, which treatments the evidence supports, what's an upsell, and what the research really says about diabetes and your heart.
Gum disease starts as gingivitis (red, bleeding gums, reversible with better cleaning) and can progress to periodontitis, where the gums and bone that hold teeth in place break down. It affects 42% of U.S. adults over 30 and 60% of those over 65. Smokers have twice the risk. First-line treatment is scaling and root planing (deep cleaning, about $180–$350 per quadrant in Tennessee), followed by maintenance cleanings every few months. Treating it modestly improves blood sugar in people with diabetes. A heart link exists, but treatment hasn't been shown to prevent heart disease.
How this page handles evidence: clinical claims come from the American Academy of Periodontology's 2017 classification, the ADA's clinical practice guideline, Cochrane reviews, the CDC, and an American Heart Association scientific statement. Where research shows an association but not cause and effect, we say so plainly. Prices are Tennessee estimates from our cost guide.
The warning signs
Gum disease is usually painless until it's advanced, which is why so many people find out at a checkup instead of from symptoms. The CDC lists these warning signs:
Red, puffy, or bleeding gums
Gums that look red or swollen, or that bleed when you brush, floss, or touch them. Bleeding isn't normal, even if it's common.
Receding gums
Gums pulling away from the teeth, making teeth look longer, often with new sensitivity.
Loose or shifting teeth
Teeth that feel loose, spread apart, or change how your bite fits together. This is a late sign, so get seen promptly.
Pain when chewing
Along with persistent bad breath or a bad taste, this can signal an active infection or abscess in the gums.
Your biggest risk factors are ones you can see on your own health history: smoking (the CDC says smokers have twice the risk of nonsmokers, and treatment works less well for them) and diabetes. Age raises risk too: per the National Institute of Dental and Craniofacial Research, periodontitis affects 42.2% of U.S. adults 30 and older and 59.8% of those 65 and older (NHANES 2009–2014).
Gingivitis vs. periodontitis: the line that matters
The difference isn't how bad your gums look. It's whether the tooth's attachment and bone have been lost. That's measured, not guessed: with a probe that records pocket depths and attachment levels, and with X-rays that show the bone.
| Gingivitis | Periodontitis | |
|---|---|---|
| What's happening | Inflammation of the gums only | Gums and the bone supporting the teeth are breaking down |
| Signs | Red, swollen gums that bleed easily | Deeper pockets, attachment loss, bone loss on X-rays, recession, and eventually loose teeth |
| Reversible? | Yes, with a regular cleaning and better daily brushing and flossing | Lost bone generally doesn't grow back on its own. Treatment stops or slows the damage. |
| Typical treatment | Regular cleaning (prophylaxis) | Scaling and root planing, then periodontal maintenance; sometimes surgery |
What “Stage III, Grade B” means
Since the 2017 World Workshop, run by the American Academy of Periodontology and the European Federation of Periodontology, dentists describe periodontitis with a stage and a grade. The old labels “chronic” and “aggressive” periodontitis were retired. If your chart uses the new terms, here's the translation.
STAGE I to IV: how severe, how complex
The stage describes how much damage has been done and how complicated treatment will be. Stage I is early, with minimal attachment loss. Stage IV is the most advanced, with major bone loss, often tooth loss, and complex rebuilding needs. Stages II and III fall in between.
GRADE A to C: how fast it's likely to progress
The grade estimates the risk of further progression, using evidence of how fast it has moved so far and risk factors such as smoking and how well diabetes is controlled. Grade A is low risk, B moderate, C high. Your grade is the part you can most change: quitting smoking and controlling blood sugar both count.
Ask your dentist to show you the chart and X-rays behind your stage and grade. You're entitled to a copy of your records, and they're exactly what a second-opinion dentist will want to see.
The treatment ladder
Treatment goes up a step at a time. Most people's disease is controlled at the first two steps.
- Daily care and risk factors. Brushing twice a day, cleaning between teeth daily (floss, small brushes, or a water flosser), quitting smoking, and managing diabetes. Without this, no in-office treatment lasts.
- Scaling and root planing (“deep cleaning”). Cleaning the root surfaces below the gumline, usually with numbing, one or two quadrants at a time. The ADA's 2015 clinical practice guideline recommends it as the initial treatment for periodontitis, having found a moderate benefit that outweighs potential harms.
- Re-evaluation. Several weeks later, pockets are measured again to see what healed and what didn't. Ask for this appointment; it's how you know whether treatment worked.
- Periodontal maintenance, for life. Cleanings every few months (often every three to four), billed as code D4910. This is what keeps periodontitis from coming back.
- Surgery, for areas that don't respond. A periodontist (a gum specialist with additional years of training) may recommend surgery to clean deep pockets, reshape bone, regenerate lost tissue, or graft gum where it has receded.
- Extraction and replacement, when a tooth has lost too much support to keep. See our extractions guide.
Not sure a deep cleaning is warranted? Our cleanings guide lists the evidence a legitimate recommendation should come with: a measured gum chart, X-rays showing bone loss, and a diagnosis naming which quadrants are affected.
Add-ons and lasers: what the guideline says
Deep cleanings are often sold with extras. The ADA's guideline rated each one, and the ratings are worth knowing before you agree to pay for them.
| Add-on | ADA guideline's rating |
|---|---|
| Low-dose (subantimicrobial) doxycycline pills | Recommended, the strongest rating of the add-ons |
| Systemic antibiotics | Weak recommendation; higher doses carry more side-effect risk |
| Chlorhexidine chips placed in pockets | Weak recommendation |
| Photodynamic therapy with a diode laser | Weak recommendation |
| Doxycycline gel, minocycline microspheres | Expert opinion in favor; limited evidence |
| Other lasers as add-ons | Expert opinion against, because the benefit is uncertain |
None of this makes add-ons wrong. Some patients benefit, and the guideline itself says recommendations should be combined with clinical judgment. But an add-on presented as required, or a laser treatment sold as a replacement for proven care, deserves a direct question: “What would happen if I did scaling and root planing alone?”
Diabetes and your heart: what the evidence shows
You'll see claims that gum disease causes heart attacks, strokes, and more. Some of the connections are real; some are overstated. Here's the honest version.
01 Diabetes: a two-way street, with real evidence
Diabetes raises the risk and speed of gum disease; it's one of the factors in your grade. And treating gum disease appears to help blood sugar. A 2022 Cochrane review (30 studies, 2,443 people) found periodontal treatment lowered HbA1c by about 0.43 percentage points at three to four months compared with no treatment or usual care (moderate-certainty evidence), with benefits also seen at 6 and 12 months. That's a modest but meaningful effect. If you have diabetes, gum care is part of diabetes care.
02 Heart disease: linked, but not proven to be caused
An American Heart Association scientific statement found gum disease is associated with atherosclerotic vascular disease independent of known confounders, but that a causal relationship has not been demonstrated. It also found no evidence that gum treatment prevents heart disease or stroke, and called claims implying otherwise unwarranted. Treat gum disease to keep your teeth, not because someone told you it will prevent a heart attack.
Gum disease around implants
Implants can't get cavities, but they can lose bone. The 2017 classification created the first formal categories for implant gum disease: peri-implant mucositis (bleeding and inflammation without bone loss, which is reversible) and peri-implantitis (inflammation with progressive bone loss around the implant). If you've had periodontitis, you're a higher-risk implant patient. Keep up maintenance visits, and ask the dentist to probe and chart around implants just as for natural teeth.
Cost and coverage
Gum treatment is billed per quadrant (a quarter of the mouth), so the total depends on how many areas are affected.
| Treatment | Estimated cost | Notes |
|---|---|---|
| Scaling and root planing, per quadrant | $180–$350 typical ≈ $250 | Most mouths that need it need 2–4 quadrants: about $360–$1,400 total. |
| Periodontal maintenance | Varies | Usually more than a regular cleaning, often every 3–4 months. We have no reliable Tennessee figure. |
| Gum surgery and grafting | Varies widely | Depends on the procedure and number of teeth. Get a written quote from the periodontist. |
Insurance: scaling and root planing is usually a “basic” or “major” service, and plans often limit how often maintenance cleanings are paid. Ask how your plan handles code D4910 before you start. TennCare covers scaling and root planing and full-mouth debridement for adults and children at no cost (TennCare guide). Original Medicare doesn't cover gum treatment. Dental school clinics at UTHSC, Meharry, and LMU offer gum treatment at reduced fees (low-cost care guide).
Questions people actually ask us
In the words patients use — because the worry behind the question is usually the real question.
Red, puffy gums that bleed when you brush, floss, or touch them. Other signs, per the CDC, include gums pulling away from the teeth, sensitive teeth, pain when chewing, and loose teeth. Gum disease is usually painless early on, so regular checkups with gum measurements are how most people find out.
Gingivitis, inflammation of the gums only, is reversible with a professional cleaning and better daily brushing and flossing. Periodontitis, where the gums and supporting bone have broken down, generally can't be fully reversed because lost bone doesn't grow back on its own, but treatment can stop or slow it and keep your teeth. Some surgical procedures can regenerate part of the lost tissue.
Since the 2017 World Workshop classification, the stage (I to IV) describes how severe the disease is and how complex treatment will be, with Stage IV the most advanced. The grade (A to C) estimates how fast it's likely to progress, based on its history and risk factors such as smoking and diabetes control. Grade A is low risk and Grade C high risk.
Our Tennessee estimate for scaling and root planing (deep cleaning) is $180 to $350 per quadrant, about $250 typical. Most mouths that need it need two to four quadrants, so roughly $360 to $1,400. Ongoing periodontal maintenance cleanings, usually every three to four months, cost more than regular cleanings. TennCare covers deep cleanings at no cost for members.
It hasn't been proven. An American Heart Association scientific statement found gum disease is associated with atherosclerotic vascular disease, but said a causal relationship has not been demonstrated and that gum treatment hasn't been shown to prevent heart disease or stroke. Treat gum disease to protect your teeth and overall oral health.
Probably, modestly. A 2022 Cochrane review of 30 studies found periodontal treatment lowered HbA1c by about 0.43 percentage points at three to four months compared with no treatment or usual care, with benefits also seen at 6 and 12 months. Diabetes also makes gum disease worse, so managing both helps each.
The evidence doesn't show that. The ADA's clinical practice guideline recommends scaling and root planing as the initial treatment. It gave photodynamic therapy with a diode laser only a weak recommendation as an add-on, and expert opinion against other lasers as add-ons because of uncertain benefit. Ask what the expected result would be with scaling and root planing alone.
Usually every three to four months, as periodontal maintenance (code D4910), though your dentist or periodontist sets the interval based on how your gums respond. Maintenance is what keeps periodontitis from returning. Many insurance plans cover these visits differently from regular cleanings, so check before treatment.
Sources & method
- CDC — Smoking, Gum Disease, and Tooth Loss — cdc.gov: warning signs, smokers' twice-higher risk, and reduced treatment effectiveness in smokers.
- NIDCR — Periodontal Disease in Adults — nidcr.nih.gov: 42.2% prevalence at 30+, 59.8% at 65+ (NHANES 2009–2014).
- American Academy of Periodontology — 2017 World Workshop proceedings (press release, June 2018) — perio.org: staging and grading, retirement of “chronic” and “aggressive,” and peri-implant disease definitions.
- ADA — Nonsurgical Treatment of Chronic Periodontitis Clinical Practice Guideline (2015) — ada.org: scaling and root planing as initial treatment; ratings for each adjunct, including expert opinion against other lasers.
- Simpson TC et al., Cochrane — Treatment of periodontitis for glycaemic control in people with diabetes mellitus (2022, CD004714.pub4) — cochranelibrary.com: HbA1c −0.43 points at 3–4 months (30 studies, 2,443 participants; moderate certainty), −0.30 at 6 months, −0.50 at 12 months (one study).
- Lockhart PB et al., American Heart Association scientific statement, Circulation (April 2012) — professional.heart.org: an independent association, but no demonstrated causation and no evidence treatment prevents heart disease or stroke.
- Tennessee Dental Authority — cost guide — scaling and root planing estimate; TennCare covered services — Tenn. Comp. R. & Regs. 1200-13-14-.04.
Method in one line: definitions follow the current professional classification; treatment recommendations follow the ADA's evidence-based guideline with its strength ratings; and every health-link claim is labeled as either demonstrated (diabetes, from a Cochrane review) or associative only (heart disease, per the AHA).