In 2017, a systematic review and meta-analysis of 47 studies, each following implants for at least three years on average, estimated that peri-implantitis affected 9.25% of implants (95% CI 7.57 to 10.93) and 19.83% of patients (95% CI 15.38 to 24.27). Peri-implant mucositis, the earlier and milder inflammation, was far more common: 29.48% of implants and 46.83% of patients (Lee et al., Journal of Dentistry, 2017).

Those numbers sound alarming until you notice the unit changes the answer. The same studies give about 9% or about 20% depending on whether you count implants or people, and heterogeneity was very high. This guide covers how common implant problems are, what separates mucositis from peri-implantitis, what the research links to early failure and disease, what we know about pain after surgery, and when to call your dentist.

Key Takeaways A 2017 meta-analysis of 47 studies estimated peri-implantitis in 9.25% of implants and 19.83% of patients, with mucositis in 29.48% of implants, and very high heterogeneity. Diabetes was linked to about 46% higher risk of peri-implantitis in a 2017 meta-analysis. In a 2019 meta-analysis of single implants, all failures were early. Pain after surgery is common, and the evidence for a specific pain regimen is insufficient.

How Common Is Peri-Implantitis?

Between about 9% and 20%, depending on what you count. In the 47-study meta-analysis, peri-implantitis affected 9.25% of implants and 19.83% of patients, and its prevalence increased with time in function. Heterogeneity ranged from 94.7% to 99.3%, so the authors cautioned that the figures need careful interpretation (Lee et al., Journal of Dentistry, 2017).

A separate 2018 meta-analysis of 29 articles that used a standard case definition found a similar picture: 18.5% of patients and 12.8% of implants. It also found that moderately rough implant surfaces were associated with lower peri-implantitis prevalence (p = 0.011), and it noted the prevalence remains highly variable even with a clinical definition (Rakic et al., Clinical Oral Investigations, 2018).

Prevalence of Peri-Implant Disease by Unit of Analysis Dot plot with 95 percent confidence intervals on a 0 to 60 percent axis. Peri-implantitis, implant level: 9.25 percent (7.57 to 10.93). Peri-implantitis, patient level: 19.83 percent (15.38 to 24.27). Peri-implant mucositis, implant level: 29.48 percent (22.65 to 36.32). Mucositis, patient level: 46.83 percent (38.30 to 55.36). Heterogeneity was very high, 94.7 to 99.3 percent. Source: Lee et al., Journal of Dentistry, 2017. 0% 10% 20% 30% 40% 50% 60% Peri-implantitis, per implant 9.25% Peri-implantitis, per patient 19.83% Mucositis, per implant 29.48% Mucositis, per patient 46.83% 95% confidence intervals. Heterogeneity between studies was very high (I2 94.7 to 99.3%).
Counting patients roughly doubles the figure compared with counting implants, because one patient with several implants only needs one affected.

[CITATION CAPSULE] A 2017 meta-analysis of 47 studies estimated peri-implantitis in 9.25% of implants (95% CI 7.57 to 10.93) and 19.83% of patients, and peri-implant mucositis in 29.48% of implants and 46.83% of patients, with very high heterogeneity and a prevalence of peri-implantitis that increased over time (Lee et al., Journal of Dentistry, 2017).

[UNIQUE INSIGHT] A single quoted number hides a two-fold spread caused by the unit of analysis alone. A patient with four implants counts once at the patient level, and each of the four counts separately at the implant level. When you read “10% of implants” or “20% of patients,” neither is wrong, and they don’t contradict each other. They answer different questions.

What’s the Difference Between Mucositis and Peri-Implantitis?

Mucositis is inflammation of the gum around an implant, while peri-implantitis involves bone loss as well. This definition comes from general periodontology, not from the studies above, though the studies count them as separate conditions with separate prevalences. Mucositis is more common and, in principle, the stage where intervention can still stop progression.

The 2017 analysis suggests the two may not be closely linked, since different variables influenced them: functional time and the implant-to-subject ratio were associated with patient-level peri-implantitis, but not with mucositis (Lee et al., Journal of Dentistry, 2017). That’s why the checkup frequency guide stresses regular probing and bleeding checks, not just waiting for symptoms.

A dentist pointing to a panoramic dental X-ray held up in front of a patient

What Raises the Risk of Implant Problems?

Several factors have systematic-review support. A 2017 meta-analysis found diabetes or hyperglycaemia was associated with greater risk of peri-implantitis (RR 1.46, 95% CI 1.21 to 1.77), with no significant association for mucositis, and a 3.39-fold higher risk in non-smokers with hyperglycaemia (Monje et al., Journal of Clinical Periodontology, 2017). The authors urged great caution in interpretation. The diabetes and smoking guide covers this in depth.

Excess cement is another. A 2017 systematic review of 26 publications covering 945 subjects found peri-implant disease prevalence ranged from 1.9% to 75% of cemented restorations, with excess cement present in 33% to 100% of those cases, and higher prevalence with cemented than with screw-retained restorations (Staubli et al., Clinical Oral Implants Research, 2017). A history of gum disease also mattered: a 2016 meta-analysis found a history of periodontal disease significantly affected peri-implantitis, and implants under maintenance had slightly better survival (Monje et al., Journal of Dental Research, 2016).

Risk Factors With Systematic Review Support Three-card summary. Diabetes or hyperglycaemia: risk of peri-implantitis higher, relative risk 1.46 with 95 percent confidence interval 1.21 to 1.77, no association for mucositis (Monje 2017). Excess cement: present in 33 to 100 percent of peri-implant disease cases with cemented restorations, 26 publications, 945 subjects (Staubli 2017). Periodontal history: a history of periodontal disease significantly affected peri-implantitis at implant and patient levels (Monje 2016). Diabetes Peri-implantitis RR 1.46 (1.21 to 1.77) No link with mucositis Monje 2017 Excess cement Present in 33 to 100% of disease cases Cemented crowns Staubli 2017 Gum disease history Significantly affected peri-implantitis Maintenance helps survival Monje 2016
Diabetes, cement, and gum history each have systematic-review support, and all three can be managed or checked.

What Causes Early Implant Failure?

Early failure is uncommon and shows up in the first months. In the 2019 meta-analysis of single implants, all failures were early implant failures, with 94.9% survival for immediate placement and 98.9% for delayed (Cosyn et al., Journal of Clinical Periodontology, 2019). That review compared timing protocols, so it isn’t a general failure rate, but it supports the idea that early failure is an early-period event.

The causes in any single case vary and often combine: infection, poor stability, overloading, and patient factors above. The same-day implant guide covers what the placement-timing data show, and the implant lifespan guide covers longer-term outcomes.

Is Pain After an Implant Normal?

Some pain is common, and the evidence on how to manage it is incomplete. A 2021 systematic review on acute pain after implant surgery screened 925 papers and included 38 studies, 8 in the quantitative analysis. It found flapped versus flapless surgery, anxiety, and longer surgical duration were key factors in pain intensity, and strong evidence that location (upper versus lower jaw) is not a risk factor (Lopez-Lopez et al., International Journal of Oral and Maxillofacial Implants, 2021).

On treatment, a 2021 meta-analysis of 9 randomized trials found NSAIDs reduced pain and rescue analgesic use compared with placebo in a pooled analysis of two studies, and suggested pain control may matter most in the first 72 hours. The authors concluded there is insufficient evidence to recommend a specific analgesic regimen (Khouly et al., Clinical Oral Investigations, 2021). The recovery timeline guide walks through the first days.

[PERSONAL EXPERIENCE] Patients tend to worry most about pain that returns after it had settled, or that is out of proportion to the first days. That pattern, more than the pain level on day two, is what we ask people to call about.

When Should You Call Your Dentist?

Promptly if something changes. These are signs worth reporting, drawn from general clinical practice and not from the reviews above:

  • Gums around the implant that bleed, swell, or produce pus
  • An implant or crown that feels loose
  • Pain that worsens after settling, or doesn’t ease over several days
  • A bad taste or persistent bad breath near the implant
  • Visible recession or exposed metal

Isn’t catching mucositis early better than treating bone loss later? Keep regular recalls, because the earlier problems often cause no symptoms. For the habits that can put restorations at risk, see the habits guide.

[ORIGINAL DATA] We’re evaluating recording, in general terms, how often implant maintenance visits in this practice identify early gum inflammation around an implant, without publishing a figure until it’s properly documented across a larger patient base.

Frequently Asked Questions

How common is peri-implantitis?

A 2017 meta-analysis of 47 studies estimated 9.25% of implants and 19.83% of patients, and a 2018 meta-analysis of 29 articles found 12.8% of implants and 18.5% of patients. Heterogeneity was high, so the figures are estimates.

What’s the difference between peri-implant mucositis and peri-implantitis?

Mucositis is inflammation of the gum around an implant, and peri-implantitis includes bone loss. That’s general periodontology. The 2017 analysis found mucositis in 29.48% of implants and peri-implantitis in 9.25%.

Does diabetes increase the risk of implant problems?

It does for peri-implantitis. A 2017 meta-analysis found a relative risk of 1.46 (95% CI 1.21 to 1.77) in diabetes or hyperglycaemia, with no significant association for mucositis, and urged caution in interpretation.

Is pain after dental implant surgery normal?

Some pain is common. A 2021 review found surgical technique, anxiety, and longer surgery affected pain intensity, and a 2021 meta-analysis found insufficient evidence to recommend a specific pain regimen. Call if pain worsens or returns after settling.

When do dental implants usually fail?

Early failures cluster in the first months. In a 2019 meta-analysis of single implants, all failures were early, with 94.9% survival for immediate placement and 98.9% for delayed placement.

Conclusion

Implant problems are well studied and not rare: peri-implantitis affected roughly one in ten implants and one in five patients in pooled data, and mucositis was more common. Diabetes, excess cement, and a history of gum disease have systematic-review support as risks, and early failures cluster in the first months.

The practical step is to keep regular recalls and report changes promptly. For a wider view of how long implants last and what affects them, see How Long Do Dental Implants Last?

Sources