Pyorrhea is an older term for what dentists now call periodontitis, a chronic infection of the gums and bone that support your teeth. It’s the leading cause of tooth loss in adults alongside cavities, and it affects roughly 42% of American adults over age 30. About 8% of those cases are severe. The word “pyorrhea” literally refers to a discharge of pus, which describes one of the disease’s hallmark signs, but the term has fallen out of clinical use in favor of “periodontitis.”
What Happens in Your Gums
Periodontitis starts with bacterial buildup along and below the gumline. When plaque and tartar aren’t removed, the bacteria trigger chronic inflammation in the soft tissue surrounding your teeth. Over time, this inflammation destroys the ligament that anchors each tooth to the jawbone, and the bone itself begins to erode. Deep pockets form between the gums and teeth, which fill with more bacteria and accelerate the cycle.
Three bacterial species are the primary drivers of this destruction. The most studied is one that produces enzymes capable of breaking down antibodies your immune system sends to fight it, essentially disarming your body’s own defenses. These bacteria don’t work alone. They colonize in coordinated waves: a first group of moderately harmful species settles in, creating conditions that allow the more destructive bacteria to take hold afterward. Some of these organisms can even invade the cells of your gum tissue directly, making them harder to eliminate.
Signs You May Have It
Early gum disease, called gingivitis, causes red, swollen gums that bleed when you brush or floss. At this stage the damage is fully reversible. Periodontitis develops when that inflammation goes unchecked and starts destroying bone. The key warning signs include:
- Pus between teeth and gums: this is the “pyorrhea” that gives the condition its old name
- Receding gums: your teeth look longer than they used to because the gum tissue is pulling away
- Deepening pockets: the gaps between gums and teeth widen and trap more debris
- Loose teeth: as bone support erodes, teeth shift or feel unstable
- Persistent bad breath: the bacterial colonies produce sulfur compounds
One important distinction: once periodontitis develops, you remain a periodontitis patient even after successful treatment. Gingivitis can be fully reversed, but periodontitis causes permanent structural changes. The bone and ligament that are lost don’t grow back on their own, which is why ongoing maintenance matters so much.
Who Is Most at Risk
Smoking is the single most significant modifiable risk factor. It damages gum tissue through multiple pathways at once: it impairs blood flow to the gums, weakens the immune response, disrupts connective tissue repair, and alters bone metabolism. The damage is even worse for people who carry certain genetic variations. Smokers with specific gene patterns related to inflammatory signaling showed more severe attachment loss and a higher risk of tooth loss than smokers without those patterns, while the same genetic variations made little difference in nonsmokers. In other words, smoking can activate genetic vulnerabilities that would otherwise stay quiet.
Beyond tobacco, other factors that increase your risk include uncontrolled diabetes, hormonal changes during pregnancy or menopause, certain medications that reduce saliva flow, and a family history of gum disease. Age, sex, and race also play a role in how the disease progresses.
How It Affects the Rest of Your Body
Periodontitis isn’t just a mouth problem. The bacteria that colonize deep gum pockets can enter the bloodstream, a process called bacteremia, spreading inflammation to distant organs. Researchers have identified two main pathways for this: direct bacterial translocation through the bloodstream, and a subtler mechanism where chronic gum inflammation reprograms immune cell production in the bone marrow, making your body produce more aggressive inflammatory cells overall. This systemic inflammatory state has been linked to cardiovascular disease, poorly controlled diabetes, and respiratory conditions.
Stages of Severity
Dentists classify periodontitis into four stages (I through IV) based on the most severely affected area in your mouth. The staging considers how much bone has been lost, how deep the pockets are, and whether teeth have already been lost to the disease. Stage I represents early periodontitis with modest bone loss. Stage IV means extensive destruction, often with multiple missing teeth and a compromised ability to chew. The old categories of “chronic” and “aggressive” periodontitis were eliminated in 2017 because severity and speed of progression exist on a spectrum rather than as separate diseases.
Treatment for Early to Moderate Cases
The standard first-line treatment is a deep cleaning procedure called scaling and root planing. Your dental provider uses instruments to remove tartar deposits from below the gumline and smooth the root surfaces of your teeth so the gum tissue can reattach more closely. This is typically done in sections over two or more visits, often with local anesthesia to keep you comfortable.
Scaling and root planing is effective at reducing pocket depth, bleeding, and bacterial load. Studies show measurable improvements within three months. For most patients without complicating factors like tobacco use, this nonsurgical approach is sufficient to stabilize the disease, though it won’t regenerate bone that has already been lost.
Treatment for Advanced Cases
When pockets are too deep to clean effectively with instruments alone, surgical options come into play. In a regenerative procedure, a periodontist folds back the gum tissue, removes bacteria and damaged tissue, and then places materials to encourage your body to rebuild lost bone. These materials can include bone grafts, membranes that act as filters to guide tissue growth, or proteins that stimulate regeneration. The goal is to partially reverse structural damage that nonsurgical treatment can’t address.
In the most severe cases, teeth that have lost too much support may need to be extracted and replaced with implants or other prosthetics.
Long-Term Maintenance
After active treatment, periodontitis requires lifelong follow-up. The American Academy of Periodontology recommends that most patients start with professional maintenance visits every three months, which is more frequent than the typical six-month cleaning schedule for healthy patients. These visits involve re-evaluating pocket depths, removing new bacterial buildup from below the gumline, and checking that you’re keeping plaque under control at home.
The evidence favors more frequent visits over less frequent ones, though the ideal interval varies by person. Some patients eventually extend to every four or six months based on how stable their condition remains. Others with aggressive disease patterns or risk factors like smoking may need to stay on a three-month schedule indefinitely. The maintenance visits aren’t optional extras. Without them, the bacterial colonies re-establish, pockets deepen again, and bone loss resumes where it left off.
At home, thorough daily brushing and interdental cleaning (floss, interdental brushes, or water flossers) are the foundation. Your provider will evaluate your plaque control at each visit and adjust recommendations if certain areas are consistently accumulating buildup.