What Is a Dental Implant Infection?
A dental implant infection is a bacterial infection in the gum and bone tissue surrounding an implant. It ranges from mild gum inflammation to severe bone destruction.
Dentists classify implant infections into two stages. The first stage is called peri-implant mucositis. This means inflammation is limited to the soft gum tissue around the implant. At this stage, no bone loss has occurred. Peri-implant mucositis is typically reversible with prompt treatment. [1]
The second, more serious stage is called peri-implantitis. This is when bacteria have spread deeper, causing the jawbone around the implant to break down. As bone support weakens, the implant can loosen and eventually fail. Prevalence estimates for peri-implantitis vary depending on study design and how the condition is defined. A 2022 systematic review and meta-analysis by Atieh et al. published in the Journal of Dentistry found a patient-level prevalence of approximately 22%. [3] An earlier systematic review by Lee et al. (2017) reported a lower patient-level prevalence of about 12.8%. [5] Derks and Tomasi reported a similar figure to Atieh et al. in their systematic review in Clinical Oral Implants Research. [4] These varying estimates highlight both the significance of the problem and the importance of ongoing monitoring for anyone with a dental implant.
The key difference between the two stages is bone loss. Once bone begins to deteriorate, treatment becomes more complex. That is why early detection matters so much. Knowing what to look for can help you act before an early, treatable problem becomes a serious one.
What Causes Infection Around a Dental Implant?
Bacterial buildup on and around the implant is the primary cause of infection. Several factors raise your risk.
Bacterial Plaque Buildup
The most common cause of implant infection is plaque. Plaque is a sticky film of bacteria that forms on teeth and implants every day. If plaque is not removed through brushing and flossing, it hardens into tartar (also called calculus). Tartar cannot be removed at home. It requires professional cleaning.
Bacteria in plaque and tartar release toxins that irritate the gum tissue. Over time, this irritation can progress from surface-level inflammation to deeper infection affecting the bone. The process is similar to how gum disease (periodontitis) develops around natural teeth. [1]
Smoking and Systemic Health Conditions
Smoking is one of the strongest risk factors for implant infection. Tobacco reduces blood flow to the gums, slows healing, and weakens the immune response. Smokers are significantly more likely to develop peri-implantitis compared to nonsmokers. [1]
Certain health conditions also raise your risk. Uncontrolled diabetes impairs the body's ability to fight infection and heal tissue. A history of gum disease around natural teeth is another strong predictor. If you have lost teeth due to periodontal disease, the same bacteria can target your implants. [1]
Other Contributing Factors
Poor oral hygiene is a controllable risk factor. Skipping daily cleaning around the implant allows bacteria to accumulate. Missing regular dental checkups means early signs may go unnoticed.
Surgical factors can also play a role. Excess cement left around a crown attached to an implant can trap bacteria. Implant placement in an area with insufficient bone or gum tissue may create pockets where bacteria collect. Teeth grinding (bruxism) places excessive force on the implant, which can stress the surrounding bone and make it more vulnerable to infection.
When to Call Your Dentist or Periodontist
Contact your dentist promptly if you notice gum changes, pain, or any discharge around your implant. Early intervention typically leads to better outcomes.
Early Warning Signs (Peri-Implant Mucositis)
These signs suggest that infection is in its earliest, most treatable stage. You should schedule an appointment within a few days if you notice any of the following.
- Redness or darkening of the gum tissue directly around the implant
- Swelling or puffiness of the gums near the implant site
- Bleeding when you brush, floss, or gently press on the gum around the implant
- A persistent bad taste or unpleasant odor coming from the implant area
- Mild tenderness or sensitivity when chewing on the implant
Advanced Warning Signs (Peri-Implantitis)
These signs indicate the infection has likely spread deeper. Contact your dentist or a periodontist as soon as possible, ideally within one to two days.
- Pus or a white/yellowish discharge oozing from the gum around the implant
- Throbbing or constant pain at the implant site that does not resolve
- A feeling that the implant is loose or shifting when you bite down
- Gum recession around the implant, exposing the metal post or abutment
- Deepening pockets between the gum and the implant, which your dentist can measure
- Fever, facial swelling, or swollen lymph nodes, which may indicate a spreading infection requiring urgent care
How Quickly Should You Act?
Mild redness or occasional bleeding warrants a scheduled dental visit. These early signs are concerning but typically not emergencies. Pus, increasing pain, looseness, or facial swelling are more urgent. These signs suggest bone loss may already be happening.
If you experience facial swelling combined with fever, seek care the same day. A spreading infection can become a medical emergency. Call your dentist's emergency line or visit an urgent care facility if your dentist is unavailable.
How a Dental Implant Infection Is Diagnosed
Your dentist or periodontist will use a combination of visual examination, probing, and X-rays to assess the infection's severity.
Clinical Examination and Probing
The first step is a visual inspection of the gum tissue around the implant. Your dentist will look for redness, swelling, and pus. They will gently press on the tissue to check for bleeding or discharge.
Next, they will use a periodontal probe. This is a thin, blunt instrument marked with millimeter measurements. The probe is gently inserted into the space between the gum and the implant. Healthy implants typically have a pocket depth of about 3 millimeters or less. Deeper pockets suggest tissue breakdown and possible bone loss. Bleeding during probing is also a key indicator of active inflammation. [1]
X-Rays and Advanced Imaging
Dental X-rays (radiographs) reveal bone levels around the implant. Your dentist will compare current images to earlier ones taken after the implant was placed. A loss of bone height around the implant threads is a hallmark sign of peri-implantitis.
In some cases, a cone beam computed tomography (CBCT) scan may be used. This 3D imaging technology provides a more detailed view of bone loss patterns around the implant. It helps the periodontist plan surgical treatment if bone grafting is needed.
Additional Assessments
Your dentist may also test the implant's stability. They might tap on it gently or use a specialized device that measures how rigidly the implant is integrated with the bone. A mobile implant is a serious finding, as it means significant bone support has been lost.
If pus is present, a bacterial culture may be taken to identify the specific organisms causing the infection. This information can guide antibiotic selection. Your dentist may also review your medical history for conditions like diabetes that could be contributing to the problem.
How Dental Implant Infections Are Treated
Treatment depends on the severity of the infection. Early-stage disease responds well to nonsurgical methods. Advanced disease may require surgery.
Nonsurgical Treatment for Early Infection
When caught early, peri-implant mucositis is typically treated with a professional cleaning called mechanical debridement. Your dentist or hygienist uses specialized instruments to remove plaque and tartar from the implant surface. These instruments are often made from plastic, titanium, or carbon fiber to avoid scratching the implant.
Your dentist may also prescribe an antimicrobial mouth rinse containing chlorhexidine. In some cases, a locally applied antibiotic gel is placed directly into the pocket around the implant. You will receive detailed instructions on improving your home care routine. With consistent cleaning at home and regular follow-up visits, early-stage inflammation is typically reversible. [1] [2]
Surgical Treatment for Advanced Infection
When bone loss has occurred, surgical intervention is often necessary. A periodontist, a dentist who specializes in the supporting structures of teeth and implants, performs these procedures. You can learn more about what this specialist does on the periodontics page.
One common approach is called open flap debridement. The periodontist lifts the gum tissue back to access the implant surface and damaged bone. The implant is thoroughly cleaned, and the infected tissue is removed. If bone loss has created a specific type of defect, a bone graft may be placed to encourage new bone growth. A membrane may be positioned over the graft to protect it during healing. [1]
In severe cases where too much bone has been lost, the implant may need to be removed entirely. After the infection is resolved and the site has healed, it may be possible to place a new implant. This process takes several months and sometimes requires a separate bone grafting procedure before a new implant can be placed.
Antibiotics and Supportive Therapies
Oral antibiotics may be prescribed alongside mechanical treatment, especially if the infection is severe or spreading. Common antibiotics used for implant infections include amoxicillin, metronidazole, or a combination of both. Your dentist will choose the appropriate antibiotic based on your medical history and the severity of the infection.
Laser therapy and photodynamic therapy are newer approaches being studied for implant surface decontamination. Early research suggests these methods may help reduce bacteria on implant surfaces, but they are typically used as supplements to mechanical debridement rather than replacements.
Cost Factors for Diagnosis and Treatment
Treatment costs for dental implant infections vary widely based on the severity of disease and the procedures required. Costs vary by location, provider, and case complexity.
A diagnostic visit including X-rays and a clinical examination typically ranges from $100 to $300. Nonsurgical treatment such as professional debridement and localized antibiotics may cost between $200 and $600 per session. Multiple sessions are sometimes needed.
Surgical treatment costs more. Open flap debridement with implant surface decontamination may range from $500 to $2,000 per site. If bone grafting is added, costs can increase to $1,500 to $4,000 or more depending on the extent of the graft material needed. Implant removal, when necessary, typically ranges from $300 to $1,000.
Dental insurance coverage for implant-related treatments varies by plan. Some plans cover portions of the diagnostic and surgical fees, while others consider implant complications outside of standard coverage. Ask your insurance provider about your specific benefits before treatment begins.
Find a Periodontist Near You
A periodontist is the specialist best trained to diagnose and treat infections around dental implants. If you are experiencing any of the signs described above, use our directory to find a qualified periodontist in your area. Visit the periodontics page to search by location and schedule a consultation.
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