Periodontitis cannot be cured in the way most people hope. Unlike its milder precursor, gingivitis, periodontitis causes irreversible bone loss around your teeth. The bone that has already dissolved does not grow back on its own. But with the right treatment, periodontitis can be controlled, the disease can be stopped from progressing, and in many cases you can keep your teeth for the rest of your life.
Why Periodontitis Can’t Be Reversed
Gum disease exists on a spectrum. Gingivitis, the early stage, involves red, swollen, bleeding gums but no permanent damage. At this point, improved brushing and a professional cleaning can return your gums to full health. Once gingivitis progresses to periodontitis, though, the infection has spread below the gumline and begun destroying the bone that holds your teeth in place. That bone loss is permanent. The goal of treatment shifts from reversal to control: stopping further destruction, shrinking the infected pockets around your teeth, and stabilizing what remains.
How Dentists Classify Severity
The American Academy of Periodontology classifies periodontitis into four stages based on how much bone and attachment you’ve already lost. Understanding your stage helps you gauge how aggressive your treatment needs to be.
- Stage I: Early periodontitis. Attachment loss of 1 to 2 mm, bone loss limited to the upper portion of the root, no teeth lost. Pocket depths are 4 mm or less.
- Stage II: Moderate. Attachment loss of 3 to 4 mm, up to about a third of bone around the root affected. Pocket depths up to 5 mm.
- Stage III: Severe. Attachment loss of 5 mm or more, bone loss extending to the middle third of the root or deeper. Pockets 6 mm or greater, possible tooth mobility.
- Stage IV: Advanced. Same level of destruction as Stage III, but now teeth have drifted, your bite has shifted, or you’ve lost enough teeth that chewing is compromised.
Your dentist also assigns a grade (A, B, or C) that reflects how fast the disease is progressing. Grade C, the fastest, is more common in smokers and people with poorly controlled diabetes, specifically those with an HbA1c of 7.0% or higher. Smoking 10 or more cigarettes a day alone can push your case into the highest risk category.
Scaling and Root Planing: The First-Line Treatment
Nearly every periodontitis treatment plan starts with scaling and root planing, often called a “deep cleaning.” Your hygienist or periodontist uses instruments to scrape bacterial deposits (calculus) from below the gumline and smooth the root surfaces so gum tissue can reattach more tightly. It’s typically done one or two quadrants of your mouth at a time under local anesthesia.
The results are meaningful but modest. In a study published in the Journal of Periodontal & Implant Science, patients saw pocket depth reductions of about 1.1 mm in areas with horizontal bone loss and 0.7 mm in areas with vertical bone loss. Attachment gain followed a similar pattern: roughly 1.0 mm and 0.7 mm respectively. That may sound small, but a millimeter of pocket reduction can be the difference between a pocket that traps bacteria and one your body can manage. The cost runs about $175 per quadrant.
When Antibiotics Help
For faster-progressing cases (Grade C), your periodontist may prescribe a short course of antibiotics alongside scaling and root planing. The most studied combination pairs amoxicillin with metronidazole, taken for 7 to 14 days. A meta-analysis in the Journal of Oral & Maxillofacial Research found this regimen produced significant additional pocket depth reduction in severe pockets, about 1.3 mm beyond what deep cleaning alone achieved. Interestingly, extending the course from 7 days to 10 or 14 days did not significantly improve results, suggesting the shorter course is often sufficient.
Antibiotics are not a standalone treatment. They work by reducing the bacterial load in pockets that are difficult to fully clean with instruments alone. Without the mechanical cleaning first, the bacteria simply recolonize.
Surgical Options for Advanced Cases
When pockets remain deep (typically 6 mm or more) after scaling and root planing, surgery becomes necessary. The two most common procedures are flap surgery and bone grafting.
In flap surgery, a periodontist lifts the gum tissue back, cleans the root surfaces directly, then repositions the tissue and sutures it tightly against the tooth. This eliminates deep pockets and makes future cleaning more effective. The cost averages around $559 per quadrant.
Bone grafting aims to rebuild some of the lost bone structure. Grafting materials include tissue harvested from elsewhere in your jaw (autograft), processed donor bone (allograft), or animal-derived materials (xenograft). Xenografts are the most commonly used, accounting for about 40% of cases, followed by allografts at roughly 35%. Bone grafts work best in vertical defects, where bone has been lost in a narrow, wall-like pattern rather than broadly across the jaw. Complete regeneration is rare, but grafting can fill in defects enough to stabilize a tooth that would otherwise be lost.
Laser Treatment: LANAP
Laser-Assisted New Attachment Procedure (LANAP) is a newer alternative that uses a specialized laser to kill bacteria and remove diseased tissue without cutting or suturing. It targets infected tissue while leaving healthy tissue intact, and it promotes clot formation that can help new connective tissue attach to the root surface.
Clinical data shows LANAP reduces pocket depth by an average of about 44%, compared to roughly 40% for scaling and root planing alone. Bleeding on probing dropped by nearly 93% with LANAP versus 88% with deep cleaning. These numbers look promising, but the difference between the two approaches was not statistically significant. LANAP may offer a less invasive experience with similar outcomes, which matters if you’re anxious about traditional surgery, but it’s not a dramatically superior treatment based on current evidence.
Daily Home Care That Actually Works
Treatment in the dental chair only works if you maintain the results at home. The single most impactful change for people with periodontitis is switching from floss to interdental brushes, the small bottle-brush-shaped picks sized to fit between your teeth.
A study comparing the two found that interdental brushes removed significantly more plaque than floss in periodontitis patients. Starting from similar baseline pocket depths (around 5.7 to 5.8 mm), both groups saw pockets shrink to about 5.0 mm over six weeks, but interdental brush sites showed greater pocket reduction. The reason is straightforward: periodontitis creates irregular spaces between teeth and below the gumline that flat floss simply can’t reach. Interdental brushes conform to these spaces and physically sweep out more bacteria.
Your periodontist or hygienist can help you select the right brush sizes for different gaps in your mouth. Most people with periodontitis need two or three different sizes. Use them once daily, ideally before brushing so your toothpaste can reach freshly cleaned surfaces. An electric toothbrush with a pressure sensor is also worth the investment, as it removes more plaque than manual brushing while preventing the aggressive scrubbing that can damage already-compromised gums.
The Maintenance Schedule
After active treatment, periodontitis requires ongoing professional maintenance for the rest of your life. The standard recommendation is every three months, at least initially. The American Academy of Periodontology’s position paper states that three-month intervals result in decreased likelihood of progressive disease compared to less frequent visits. These appointments involve measuring your pocket depths, removing any new calculus buildup, and catching early signs of relapse before they cause further bone loss.
It’s worth noting that the evidence for the three-month interval specifically is not as airtight as most people assume. A systematic review found that no studies have directly compared different maintenance intervals head-to-head. Three months became the standard based on how quickly bacteria repopulate after cleaning, not on randomized trials proving it’s the ideal frequency for every patient. Some people with stable, slow-progressing disease (Grade A) may eventually stretch to four or six months. Others with aggressive disease may need to come in more often. Maintenance visits cost roughly $70 to $118 depending on the number of teeth being cleaned.
Managing the Factors That Fuel It
Two risk factors have an outsized influence on whether periodontitis treatment succeeds or fails: smoking and diabetes.
Smoking restricts blood flow to the gums, impairs your immune response, and slows healing after any procedure. The AAP classification system treats heavy smoking (10 or more cigarettes daily) as a modifier that automatically bumps your disease to the fastest-progressing grade. Quitting smoking is, in practical terms, one of the most effective things you can do for your periodontal health. Even reducing your intake meaningfully improves treatment outcomes.
Diabetes creates a two-way relationship with periodontitis. High blood sugar feeds the bacteria that cause gum disease, while the chronic inflammation of periodontitis makes blood sugar harder to control. Patients with an HbA1c of 7.0% or higher face worse periodontal outcomes. Getting blood sugar under tighter control doesn’t just help your overall health; it directly affects how well your gums respond to treatment and how stable they remain afterward.
Stress, certain medications that cause dry mouth, and genetic susceptibility also play roles, but smoking and diabetes are the two modifiable factors with the strongest evidence behind them. Addressing them isn’t optional if you want long-term stability.