Peri-Implantitis Treatment: How an Infected Implant Is Cleaned, Rebuilt or Replaced, and What Each Step Achieves

Patients usually describe the problem in plain words: the gum around my implant bleeds, it is swollen, there is a bad taste, or my dentist said I am losing bone. Clinically, those complaints fall into two conditions with very different outlooks. Peri-implant mucositis is inflammation of the gum around an implant — redness, swelling, bleeding when the area is gently probed — without loss of the bone that holds the implant. Peri-implantitis is the same inflammation plus bone loss beyond the normal settling that follows placement, usually with deepening pockets around the implant.

The 2017 World Workshop case definitions, which most research now uses, add a practical rule for patients who have no earlier X-rays to compare against: bone sitting 3 mm or more below where it should be, combined with bleeding on probing and pockets of 6 mm or more, indicates peri-implantitis. The distinction matters because mucositis is reversible. A review prepared for the 2017 World Workshop of the American Academy of Periodontology and the European Federation of Periodontology found that inflammation caused by bacterial buildup reverses once cleaning is restored, although the visible signs can take longer than three weeks to settle. Peri-implantitis does not reverse on its own; the lost bone does not grow back without treatment, and often not fully even with it.

Both conditions are common. A systematic review of the epidemiology estimated mucositis in about 43% and peri-implantitis in about 22% of implant patients, with wide variation between studies. Our research review on peri-implantitis goes into those numbers and their causes. This article is about what happens once the problem is already there.

Every implant sees a small amount of bone remodeling in the months after it is placed and loaded. That is healing, not disease. What matters is bone loss that continues after that initial period, which is why the most useful single record an implant patient can own is a clear X-ray taken when the final teeth were delivered. With it, a later X-ray shows whether the bone has moved. Without it, a clinician has to judge from the pattern and depth of the defect alone.

Timing is not what most people expect. In a Swedish study that followed implant patients for nine years and modeled the bone levels of the 105 implants that developed moderate or severe peri-implantitis, the disease usually began early: 52% of those implants already showed more than 0.5 mm of bone loss by the second year in function, and 66% by the third. The loss followed a non-linear, accelerating pattern. In other words, peri-implantitis is often a problem of the first few years that becomes obvious later, and the speed at which it progresses tends to increase rather than hold steady.

That is the strongest argument for regular checks with probing and periodic X-rays, and for treating early. A shallow bone defect around an implant with good remaining support is a very different case from an implant with half its length exposed.

The European Federation of Periodontology's 2023 clinical practice guideline on peri-implant diseases, built on thirteen commissioned systematic reviews, frames treatment as a sequence: establish the diagnosis, control the causes, treat, and then keep the patient in a structured supportive-care program with periodic assessment. Treatment that skips the first part tends to disappoint, because whatever allowed the infection to take hold is still there.

Bacterial biofilm is the driver, but something usually helps it along. Excess cement left under a cemented crown is a well-documented one: in an endoscopic study of implants with peri-implant disease, residual cement was found in 81% of the diseased cases, and signs of disease resolved in 74% once it was removed. Other contributors are a crown shaped so that floss or a brush cannot reach the implant collar, parts that do not fit precisely, smoking, poorly controlled diabetes, heavy grinding, and a history of gum disease. A treatment plan that cleans the implant but leaves an uncleanable crown in place is treating the symptom.

This is one reason we generally prefer screw-retained restorations. A systematic review comparing the two fastening methods found that screw-retained crowns are more easily retrieved, which makes technical and biological problems easier to treat, and that serious biological complications such as bone loss beyond 2 mm were more frequent around cemented crowns. When the crown can come off, the implant can be cleaned directly and the crown can be reshaped or remade so it can be kept clean afterwards. Because our lab is in the building, that remake does not add weeks of waiting.

For mucositis, and for early peri-implantitis with shallow pockets, treatment starts without surgery. Under local anesthetic, the implant surface below the gum is cleaned with instruments that do not scratch titanium, the crown is removed where that is possible, and home care is reset — often with a different brush, interdental brushes or a water flosser chosen for how that particular implant is shaped. This is usually enough to resolve mucositis. A 2021 systematic review and meta-analysis found that adding antiseptics or other adjunctive measures did not improve the resolution of mucositis beyond thorough mechanical cleaning and good home care.

Peri-implantitis is harder. The threads of an implant, once exposed, trap bacteria in ways a smooth root surface does not, and a curette cannot reach every turn of a thread inside a deep pocket. The same review found that alternative biofilm-removal methods and systemic antibiotics reduced bleeding more than conventional cleaning in non-surgical treatment. A 2024 meta-analysis of antibiotics reported an additional pocket-depth reduction of about 1.3 mm at one year when antibiotics were added to non-surgical treatment, but no difference in the proportion of cases that met the definition of clinical success, and its authors cautioned that the benefit may not justify the resistance risk in less severe cases.

So antibiotics alone are not a treatment for peri-implantitis, and a course of pills without mechanical cleaning is mostly delay. Non-surgical treatment is re-evaluated after healing. When deep pockets, bleeding or pus persist, the next step is usually surgical access.

Surgical treatment lifts the gum so the implant surface and the bone defect can be seen directly and cleaned thoroughly. The largest randomized trial of the approach, published in 2022, treated 138 patients with 147 affected implants. At one year, pocket depth had fallen by 3.7 mm and bleeding by about half, with roughly 1 mm of bone gained on X-rays, and patient satisfaction was high. The same trial is a lesson in honest reporting: under a strict composite definition — no bleeding or pus at any point around the implant, no pocket deeper than 5 mm and no more than 1 mm of gum recession — only 13.5% to 16.4% of implants met every criterion. Most treated implants were much healthier; few were perfect.

The implant surface itself affects the result. In a 2016 randomized trial of 100 patients with severe peri-implantitis, surgical treatment succeeded at 79% of implants with a non-modified surface but only 34% of implants with a modern modified surface. Rinsing the surface with chlorhexidine made no difference, and systemic antibiotics helped only at the roughened implants. A 2024 meta-analysis found antibiotics added to surgery improved bone gain by just under 1 mm at one year. We use antibiotics when the case calls for them, not by default.

Where exposed threads sit above the bone and cannot be kept clean, the surgeon may smooth and polish them — a step called implantoplasty. The 2021 meta-analysis found it reduced pocket depth by about 1.1 mm more than surgery without it. The trade-off, seen in a 2026 trial that compared more and less extensive smoothing, is more gum recession, which matters in the front of the mouth, so it is a decision made site by site.

Some bone defects around implants are shaped like a crater, with bony walls around the implant. Those can be filled with a bone graft during surgery, sometimes covered with a membrane, with the aim of regaining support. The pooled evidence says regeneration does help in specific ways: more of the defect fills in on X-rays and there is less gum recession. It also says, just as clearly, that grafting did not improve how often inflammation resolved. In the 2022 trial, the bone-substitute group had less buccal recession — 0.7 mm compared with 1.1 mm — but similar pocket and bleeding results.

The long-term picture is sobering and worth hearing before treatment rather than after. A prospective study that treated crater-like defects with a bovine bone graft and followed patients for ten years kept 80% of implants with one widely used roughened surface in function, but only 55% of an older, rougher surface design, and fewer than half of the treated implants met every success criterion at ten years. Several patients needed further treatment along the way. A 2026 randomized trial found that adding a collagen membrane to the graft gave no additional benefit at three years.

In our practice, grafting is considered when the shape of the defect can hold a graft and the implant is worth keeping for the long term. Where it helps, we add platelet-rich fibrin made from the patient's own blood. And when a graft is unlikely to change the outcome, we say so, because a regenerative procedure that does not change the prognosis only adds cost.

Treatment is the beginning of a maintenance program, not the end of the problem. In a five-year study of 24 patients whose peri-implantitis was treated surgically and then followed with regular supportive care, 79% had a successful outcome at one year, 75% at three years and 63% at five years. Complete resolution, defined as no bleeding at any site, was achieved at 42% of implants at five years. Some patients had recurrence and a few lost implants. The conditions established by surgery were maintained in most patients — as long as they kept coming back.

A meta-analysis of maintenance studies suggested recall visits about every five to six months, and in a five-year study of patients with mucositis, peri-implantitis developed in 43.9% of those without preventive maintenance compared with 18.0% of those who had it. After treatment we set the interval by how the site responds, which may be closer than that for the first year. Maintenance visits with the doctors who treated you are part of how we look after implants for life.

Sometimes the most responsible treatment is removal. An implant that moves has lost its bond with the bone and cannot be saved; the International Congress of Oral Implantologists' health scale classifies a mobile implant as a failure. Removal is also usually the better choice when most of the supporting bone has already been lost, when the disease keeps returning despite well-performed treatment, when the implant is fractured, or when it sits in a position that can never be cleaned or restored well.

Removing an implant is not the brutal procedure many people imagine. In a series of 749 non-mobile implants removed with a counter-torque technique — essentially unscrewing the implant with controlled force rather than drilling it out — 98.4% came out successfully, with complications in 1.3%. A 2023 study of implants removed because of persistent peri-implantitis found that the part of the socket that had never been affected by the disease healed completely, with limited further loss at the bone crest. Grafting at the time of removal can prepare the site for a new implant; our article on implant removal and replacement explains how that works and what the success rates look like.

Removing a failing implant early can preserve the bone a replacement will need. Keeping it too long, in the hope that one more round of antibiotics will work, is how a single-implant problem becomes a bone-grafting problem.

It starts with a diagnosis rather than a treatment. At a free consultation we take a 3D CBCT scan, probe the implant, check the crown and bite, and identify the implant system, which matters when parts have to be ordered for an implant placed at another office. Many of the infected implants we see were placed elsewhere, sometimes years ago, and helping with them is a regular part of our work. You leave with a plain-language diagnosis, the options with their realistic odds — including removal when that is the honest answer — and the costs itemized in writing.

Dr. Sam Jain and Dr. Arpana Gupta carry out the treatment themselves, with IV sedation available for surgical steps. If the crown needs to be reshaped or remade so the implant can be kept clean, our in-house lab handles it. And because peri-implantitis can return, the plan includes the maintenance schedule afterwards. If an implant of yours is bleeding, swollen or tender, our implant complications page explains what to bring, and you can book a free consultation and 3D scan here.