What Is Periodontitis?
Periodontitis is a serious gum infection that damages the soft tissue and destroys the bone supporting your teeth. It develops when untreated gingivitis progresses into deeper structures.[4]
The disease starts with bacteria in dental plaque. These bacteria trigger an inflammatory response that, over time, breaks down the periodontal ligament and alveolar bone holding teeth in their sockets. As bone is lost, gums pull away from teeth, creating pockets that fill with more bacteria. The cycle continues until teeth loosen or fall out.[4][9]
Periodontitis affects roughly half of adults over age 30, making it one of the most common chronic conditions worldwide[9]. Severity ranges from mild to severe. The 2017 international classification system grades cases by both stage (I through IV, based on bone loss and complexity) and grade (A through C, based on rate of progression)[3].
Most patients experience chronic periodontitis, which advances slowly over years. A smaller group develops aggressive forms that destroy bone rapidly, sometimes in young adults with otherwise healthy mouths[3]. A rare and severe variant called necrotizing periodontal disease causes painful tissue death and typically appears in patients with weakened immune systems[1][8].
Causes and Risk Factors
Periodontitis is caused by bacterial plaque, but several risk factors determine who develops the disease and how quickly it progresses. Genetics, lifestyle, and systemic health all play roles.[4]
The Primary Cause: Bacterial Plaque
Plaque is a sticky film of bacteria that forms on teeth daily. When plaque is not removed by brushing and flossing, it hardens into tartar (calculus), which can only be removed by a dental professional. Tartar harbors bacteria that release toxins, triggering chronic inflammation in the gums.[4][9]
Over time, this inflammation breaks down the connective tissue and bone around teeth. Specific bacteria, including Porphyromonas gingivalis and Aggregatibacter actinomycetemcomitans, are strongly associated with disease progression[3].
Lifestyle and Behavioral Factors
Smoking is one of the strongest modifiable risk factors. Smokers are several times more likely to develop periodontitis and respond poorly to treatment[4]. Tobacco reduces blood flow to the gums, masking bleeding (an early warning sign) and impairing healing.
Poor oral hygiene, infrequent dental visits, high stress, and diets low in vitamin C also raise risk. Necrotizing forms of the disease are linked to severe stress, malnutrition, and immune suppression[1][8].
Medical Conditions and Medications
Diabetes, especially when poorly controlled, increases both risk and severity. The relationship is bidirectional: periodontitis also makes blood sugar harder to manage.[4]
Other contributing conditions include cardiovascular disease, chronic kidney disease, HIV, osteoporosis, and pregnancy[5][7]. Certain medications, including some calcium channel blockers, immunosuppressants like cyclosporine, and anticonvulsants like phenytoin, can cause gingival enlargement that traps plaque and worsens disease[2].
Genetic Susceptibility
Genetics influences how the immune system responds to plaque bacteria. Some patients with excellent home care still develop disease, while others with poor habits do not. Aggressive periodontitis often runs in families and can affect adolescents and young adults[3].
Symptoms and Diagnosis
Periodontitis symptoms are often subtle until the disease is advanced. Diagnosis requires a clinical exam with measurements and X-rays to assess bone loss.[4][9]
Warning Signs Patients Notice
Early symptoms include red, swollen, or tender gums; bleeding when brushing or flossing; persistent bad breath; and a bad taste that does not go away. As the disease advances, gums recede, exposing tooth roots and making teeth look longer.[9]
Later signs include loose or shifting teeth, changes in bite, pus between gums and teeth, and pain when chewing. Necrotizing forms cause sudden severe gum pain, ulcers, and tissue death with a characteristic foul odor.[1][8]
- Bleeding gums during brushing or flossing
- Persistent bad breath or bad taste
- Receding gums or longer-looking teeth
- Loose or shifting teeth
- Pain when chewing
- Pus between gums and teeth
How Periodontists Diagnose the Disease
A periodontal exam includes probing each tooth at six points to measure pocket depth. Healthy pockets are 1-3 millimeters. Pockets of 4 millimeters or more, especially with bleeding, indicate disease.[9]
Dental X-rays show bone loss between teeth, which confirms periodontitis and helps stage severity. The provider also evaluates tooth mobility, gum recession, and the amount of attached tissue. Stage I shows mild bone loss; Stage IV involves severe bone loss with tooth loss likely without intensive treatment.[3][9]
Treatment Options
Treatment depends on disease severity and ranges from professional cleaning to surgical reconstruction. The goal is to control infection, reduce pocket depth, and preserve remaining bone and teeth.[9]
Nonsurgical Treatment: Scaling and Root Planing
Scaling and root planing (SRP), often called a deep cleaning, is the first-line treatment for most cases. The provider removes plaque and tartar from above and below the gumline, then smooths root surfaces so gum tissue can reattach.[9]
SRP is typically done over one or two visits with local anesthesia. Many patients see improvement in pocket depth and bleeding within weeks. For some, SRP alone resolves moderate disease; others need additional treatment.
Antibiotics and Adjunctive Therapies
Some patients benefit from antimicrobial therapy alongside SRP. Options include locally delivered antibiotics placed directly in pockets, oral antibiotics for aggressive or necrotizing forms, and antimicrobial mouth rinses such as chlorhexidine.[1][9]
Necrotizing periodontal disease typically requires immediate debridement, systemic antibiotics like metronidazole, and treatment of underlying immune issues[1][8].
Surgical Treatment for Advanced Cases
When pockets remain deep after nonsurgical care, surgery may be needed. Common procedures include flap (pocket reduction) surgery, which lifts gums to clean root surfaces and reshape bone, and regenerative procedures using bone grafts, tissue grafts, or growth factors to rebuild lost support.[9]
Soft tissue grafts can cover exposed roots and reduce sensitivity. Guided tissue regeneration uses a barrier membrane to encourage bone and ligament regrowth. Outcomes vary based on defect type, smoking status, and patient compliance with maintenance.
When Teeth Cannot Be Saved
Teeth with severe bone loss, mobility, or hopeless prognosis may need extraction. Replacement options include dental implants, bridges, or removable dentures. Implants placed in patients with a history of periodontitis carry a higher risk of peri-implant infection, so disease must be controlled first and maintenance is essential.[6]
Recovery and Long-Term Care
Recovery time depends on the procedure. Most patients return to normal activities within days, but full tissue healing and lifelong maintenance are key to preventing relapse.[9]
After scaling and root planing, gums may be tender for a few days. Mild bleeding and sensitivity to hot and cold are common and usually fade within a week. After surgery, expect swelling, mild discomfort, and dietary restrictions for one to two weeks. Healing of soft tissue takes 4-6 weeks; bone regeneration after grafting can take 6-9 months.
Periodontitis is a chronic disease, not a one-time problem. Once active treatment is complete, patients enter periodontal maintenance: professional cleanings every 3-4 months instead of twice yearly. These visits remove tartar from below the gumline before it can restart the disease cycle.[9]
Daily home care matters as much as professional visits. Brush twice daily with a soft brush, clean between teeth with floss or interdental brushes, and avoid smoking. Patients with diabetes should keep blood sugar well-controlled, as this directly affects gum health.[4]
Cost and Insurance Considerations
Periodontal treatment costs vary widely based on disease severity, location, and the procedures needed. Most dental insurance plans cover at least part of nonsurgical care.
Scaling and root planing typically ranges from $200 to $400 per quadrant of the mouth, with most patients needing all four quadrants treated. Periodontal maintenance visits generally run $150 to $300 each. Surgical procedures range from $1,000 to $3,000 per area for pocket reduction, and bone or tissue grafting can range from $600 to $3,200 per site. Costs vary by location, provider, and case complexity.
Dental insurance often covers 50-80% of nonsurgical periodontal care after deductibles. Coverage for surgery and grafting varies more widely, and annual maximums may limit benefits. Patients should ask for a written treatment plan and an insurance pre-authorization before starting major procedures.
Many practices offer payment plans or work with third-party dental financing. Health savings accounts (HSAs) and flexible spending accounts (FSAs) can also be used for periodontal treatment.
Periodontist vs. General Dentist
A general dentist can manage gingivitis and mild periodontitis. A periodontist, who has 3 additional years of specialty training after dental school, treats moderate to severe cases and performs surgical procedures.[9]
Consider seeing a periodontist if pockets are 5 millimeters or deeper, X-rays show significant bone loss, scaling and root planing has not resolved the disease, you have aggressive or rapidly progressing forms, or you need bone grafting, gum grafting, or dental implants. Patients with diabetes, autoimmune conditions, or a family history of early tooth loss also benefit from specialist evaluation.[3][6]
Many general dentists co-manage cases with periodontists: the specialist handles surgery and complex therapy, while the general dentist provides routine care between maintenance visits. Learn more on the periodontics page.
Find a Periodontist Near You
Periodontitis does not heal on its own, and early treatment protects the bone and teeth you still have. A board-certified periodontist can stage your disease accurately, build a treatment plan that fits your case, and guide long-term maintenance. Use our directory to find a periodontist in your area and schedule an evaluation.
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