Peri-Implantitis Treatment: What to Do When Gum Disease Develops Around Dental Implants product guide

Peri-Implantitis Treatment: What to Do When Gum Disease Develops Around Dental Implants

Dental implants are one of modern dentistry's most transformative achievements - but they are not immune to infection. A growing and clinically urgent problem, peri-implant disease is the biological complication that no implant patient wants to hear about, yet one that a significant proportion will face. Based on the 2017 World Workshop criteria, peri-implant diseases represent a significant and growing public health challenge, with approximately two in three adults with dental implants having peri-implant mucositis, and one in four having peri-implantitis.

These are not minor inconveniences. Left untreated, peri-implantitis destroys the bone that holds an implant in place - silently, rapidly, and with far less predictable outcomes than equivalent disease around natural teeth. For patients who have invested significantly in implant treatment, the stakes are high. For clinicians, the complexity of managing infection around an implant surface is substantially greater than treating periodontitis around a natural tooth root.

This guide explains exactly what peri-implant mucositis and peri-implantitis are, how they are diagnosed, what treatment involves, and why specialist periodontist involvement is not optional - it is essential.

What Are Peri-Implant Diseases? Definitions and the Critical Distinction

Peri-implant diseases exist on a spectrum, and understanding the distinction between the two main conditions is clinically critical.

Peri-Implant Mucositis: The Reversible Warning Stage

Peri-implant mucositis is characterised by clinical signs of inflammation - specifically bleeding on probing - without loss of supporting bone. In this respect, it is the implant equivalent of gingivitis: a soft-tissue inflammatory response that, if caught and treated promptly, is entirely reversible.

Peri-implant mucositis is considered the precursor to peri-implantitis, a condition which may progress rapidly, leading to advanced bone loss and resulting in loss of an implant. Because it is considered a precursor and risk factor for peri-implantitis, clinicians are advised to promptly treat peri-implant mucositis and re-evaluate the outcome of treatment as a preventative measure.

Peri-Implantitis: Bone-Destructive Infection

Peri-implantitis is characterised by clinical signs of inflammation (bleeding on probing) in addition to progressive bone loss. The 2017 World Workshop on Periodontal and Peri-Implant Diseases defined it as a plaque-associated pathological condition occurring in tissues around dental implants, characterised by inflammation in the peri-implant mucosa and subsequent progressive loss of supporting bone.

The clinical definition of peri-implantitis is based on the following criteria: (1) presence of peri-implant signs of inflammation, (2) radiographic evidence of bone loss following initial healing, and (3) increasing probing depth as compared to probing depth values collected after placement of the prosthetic reconstruction.

Clinically, peri-implantitis sites may also exhibit suppuration (pus), mucosal swelling and redness, and in advanced cases, a draining sinus. Pain is thought to be a rare symptom and is usually linked to an acute infection

which means patients cannot rely on pain as an early warning signal.

How Common Is Peri-Implantitis? The Scale of the Problem

The prevalence data are striking and should be mandatory reading for any patient considering or already carrying dental implants.

The weighted mean prevalence of peri-implant mucositis is 63.0% at the patient level and 59.2% at the implant level. Peri-implantitis is observed in 25.0% of patients and 18.0% of implants. These figures are drawn from a 2025 systematic review and meta-analysis applying the standardised 2017 World Workshop criteria across 20 studies.

The risk escalates dramatically in patients who do not attend regular maintenance. In a cohort of 213 implants in 88 patients who did not receive regular peri-implant supportive therapy, the patient-level prevalence of peri-implantitis was 26.1% and peri-implant mucositis was 44.3%.

Prior periodontal disease history is among the most powerful risk amplifiers. The 10-year incidence of peri-implantitis in patients without a history of periodontitis was 6% at the implant level, compared to 29% in subjects with a history of periodontitis. This is a nearly fivefold difference - and it directly explains why patients who have previously been treated for gum disease require specialist-level monitoring of their implants, not routine dental check-ups alone.

Two associations - the presence of periodontitis (OR = 3.84) and cigarette smoking (RR = 2.07) - have been graded as highly suggestive risk factors for peri-implantitis. Additional suggestive risk factors include uncontrolled diabetes, poor biofilm control, and implant malposition (see our guide on Gum Disease Causes and Risk Factors for a full discussion of modifiable and non-modifiable risk factors).

Why Peri-Implantitis Is Harder to Treat Than Periodontitis

This is a point that is frequently underestimated by both patients and general dental practitioners - and it is the core reason why specialist periodontist involvement is so important.

The Implant Surface Problem

Natural tooth roots are covered in cementum, to which collagen fibres of the periodontal ligament attach perpendicularly. In natural teeth, collagen fibres in the connective tissue area are embedded perpendicularly to the cementum and provide robust mucosal sealing, which operates as a biological barrier. In dental implants, however, collagen fibres around the transmucosal area run parallel to the implant surface

meaning the soft tissue seal around an implant is inherently less resistant to bacterial invasion than around a natural tooth.

Furthermore, modern implants are deliberately manufactured with roughened, micro-textured surfaces to promote osseointegration. This same surface architecture that helps bone bond to the implant also creates an ideal substrate for bacterial biofilm accumulation - and makes complete decontamination extraordinarily difficult. Despite numerous attempts to treat peri-implantitis through non-surgical means, clinicians have observed limited improvements in clinical parameters; the challenge lies in gaining proper access to implant surfaces for thorough decontamination and biofilm removal, particularly in cases with deep peri-implant pockets and diverse implant surface designs.

Faster, Less Predictable Disease Progression

Peri-implantitis tends to progress more rapidly and unpredictably than periodontitis, and its treatment outcome is less predictable.

The biological reason for this accelerated destruction is well-documented. Animal studies evaluating experimental peri-implantitis have shown that the inflammatory cell infiltrate may be found in close proximity to the bone marrow spaces. Hence, the lesion may progress without the presence of a healthy connective tissue fibre compartment walling off the lesion from the alveolar bone - in contrast to the periodontitis lesion at teeth, where the inflammatory lesion is separated by an intact, supracrestal connective tissue fibre compartment.

In plain terms: around a natural tooth, the body has a structural defence mechanism that partially contains the infection. Around an implant, that containment mechanism is absent, and bone destruction can proceed directly and rapidly.

Owing to implant surface characteristics and limited access to the microbial habitats, surgical access may be required more frequently, and at an earlier stage, in peri-implantitis treatment than in periodontal therapy.

Diagnosing Peri-Implant Disease: What a Specialist Periodontist Assesses

Accurate diagnosis of peri-implant disease requires a combination of clinical probing, radiographic bone-level assessment, and comparison with baseline records. This is not a diagnosis that can be made from a visual inspection alone.

The Diagnostic Protocol

A specialist periodontist's assessment of implant health will include:

Peri-implant probing - Peri-implant probing is essential to assess the peri-implant health status and should be done at each recall visit. Unlike natural teeth, healthy implants can have a wider range of normal pocket depths, so diagnosis depends on change from baseline rather than absolute numbers alone.
Bleeding on probing (BoP) - The presence of bleeding on gentle probing is a key diagnostic indicator of active inflammation. Sites with peri-implantitis have clinical signs of inflammation (BoP), increased probing depths and/or peri-implant mucosal recession compared to baseline recordings.
Radiographic bone-level assessment - Intraoral radiography is routinely performed both immediately and at follow-up appointments after implant placement and is used to assess for peri-implantitis most reliably. The exact measurement of bone loss used to diagnose peri-implantitis has varied between studies, but less than 2 mm has frequently been reported as a threshold. Cone beam CT (CBCT) may be used in complex cases for three-dimensional bone defect mapping.
Suppuration and mucosal assessment - Visual inspection for redness, swelling, suppuration, and sinus tracts provides additional diagnostic information about disease severity.
Baseline record comparison - Critically, diagnosis of progressive peri-implantitis requires comparison with records taken at the time of implant loading. This is why implant placement records and post-loading radiographs should always be retained and transferred to treating clinicians.

Bone loss around implants can have a number of non-bacterial causes including surgical technique, implant design, implant position, crestal thickness of bone, loose prosthesis/abutment, and excessive occlusal force

which is why a specialist periodontist's capacity to differentially diagnose the aetiology of bone loss is critical before committing to a treatment pathway.

Treatment of Peri-Implant Mucositis: The Non-Surgical Priority

Peri-implant mucositis may be effectively managed with nonsurgical debridement and control of risk factors. This is the clinical consensus from the 2024 Academy of Osseointegration/American Academy of Periodontology (AO/AAP) consensus conference.

Treatment at this stage mirrors the approach for gingivitis around natural teeth (see our guide on Non-Surgical Gum Disease Treatment), but with instrument selection adapted to avoid damaging the implant surface. To prevent roughening and damaging of the implant surface, ultrasonic scalers with a non-metallic tip or resin/carbon fibre curettes are used for calculus removal. Conventional steel curettes or ultrasonic instruments with metal tips should be avoided, as any residual marks increase implant susceptibility to plaque accumulation in the future.

Patient-delivered home care and risk factor modification - including smoking cessation, glycaemic control in diabetic patients, and optimised oral hygiene technique - are integral components of mucositis management, not optional additions.

Treatment of Peri-Implantitis: A Staged, Escalating Protocol

Peri-implantitis treatment should be based on the phased treatment protocol for periodontitis, which is a continuous flow of decisions for extraction, nonsurgical and surgical treatments with step-by-step re-evaluation. The 2023 European Federation of Periodontology (EFP) S3-level Clinical Practice Guideline - the highest level of evidence-based clinical guidance available - provides the current international framework for management.

Step 1: Non-Surgical Anti-Infective Therapy

The EFP S3 clinical guidelines recommend using non-surgical protocols to establish healthier peri-implant soft tissue conditions before considering adjunctive surgical therapy.

Non-surgical treatment includes:

Professional mechanical debridement using implant-compatible instruments
Adjunctive antimicrobial therapy (local or systemic) where indicated
Prosthetic review - it is important that the clinician checks for any deposits of cement from when the crowns were cemented to the implants beneath the gums and around the implant, as this factor is often associated with the development of peri-implantitis.
Re-evaluation at approximately six weeks to assess treatment response

Recent studies have found that the adjunctive use of antibiotics to nonsurgical debridement increased the success of nonsurgical treatment for peri-implantitis. However, antibiotic selection and dosing requires clinical judgement, and the growing concern about antimicrobial resistance means this should never be a default first-line measure without specialist assessment.

Step 2: Surgical Intervention

When non-surgical therapy fails to resolve the infection - which, for established peri-implantitis with significant bone loss, is frequently the case - surgical access becomes necessary. Surgical treatments can be classified into resective, access, and reconstructive surgeries. The technique should be selected according to the patient's bone defect configuration, which relates to regenerative potential. Various combinations of decontamination methods - mechanical, chemical, and pharmacological - are required to achieve complete surface decontamination.

The three primary surgical approaches are:

Access (Open-Flap) Surgery

Access surgery overcomes the limitations of nonsurgical treatment through flap elevation, which facilitates more meticulous surface debridement with direct access, and is widely accepted as being effective for periodontitis. Likewise, its use in peri-implantitis has also been widespread and its long-term efficacy has been determined.

Resective Surgery with Implantoplasty

Resective surgery is performed in areas where regeneration is not expected, such as in non-contained defects and supracrestal defects, and it includes procedures such as bone recontouring, apically positioned flap, and implantoplasty. The difference between resective surgery for peri-implantitis and periodontitis is that implantoplasty is often considered in the former. Implantoplasty - mechanically smoothing the exposed implant threads - reduces the surface roughness available for future biofilm accumulation.

Reconstructive (Regenerative) Surgery

Reconstructive surgery induces bone regeneration in the bony defect, supports re-osseointegration of the decontaminated fixture, and minimises soft tissue recession in bone defects expected to be capable of regenerative potential, such as circumferential bone defects and 2- or 3-wall defects.

Access flap debridement, with or without resective procedures, has shown to be effective in a large number of cases. These surgical treatments, however, may be linked to post-operative recession of the mucosal margin

a trade-off that must be discussed with patients prior to treatment, particularly in aesthetically sensitive areas.

Step 3: Implant Removal

When disease is too advanced for salvage - typically when the implant has lost significant bone support and is mobile - implant removal becomes the appropriate course of action. Fixtures with peri-implantitis can initially be classified as failed or failing. A failed implant needs to be removed. In contrast, nonsurgical and surgical treatments can be applied to a failing implant.

The Role of Laser Therapy in Peri-Implantitis Treatment

Laser-assisted decontamination has emerged as an adjunctive tool in peri-implantitis management. Laser treatment may result in a short-term decrease in peri-implant pocket depth, while air powder abrasive is effective in cleaning a previously contaminated implant surface. Smile Solutions' specialist periodontists have extensive experience with all-tissue laser systems in both non-surgical and surgical peri-implantitis protocols (see our guide on Laser Periodontal Treatment at Smile Solutions for a detailed discussion of the evidence base and clinical applications).

The Importance of Ongoing Implant Maintenance

Prevention of peri-implant diseases should commence when dental implants are planned, surgically placed, and prosthetically loaded. Once the implants are loaded and in function, a supportive peri-implant care programme should be structured, including periodical assessment of peri-implant tissue health.

The 2024 AO/AAP consensus is unequivocal: supportive peri-implant maintenance is essential for long-term peri-implant tissue stability and health.

Maintenance intervals for implant patients should be individualised based on risk profile - patients with a history of periodontitis, smokers, and those with a prior episode of peri-implant disease typically require more frequent recall (every three to four months) than low-risk implant patients. Smile Solutions' specialist periodontists and hygienists work together to deliver structured supportive peri-implant therapy as part of the long-term management plan (see our guide on Periodontal Maintenance).

Key Takeaways

Approximately two in three adults with dental implants have peri-implant mucositis, and one in four have peri-implantitis
making this the most common complication in implant dentistry.
Peri-implant mucositis is reversible; peri-implantitis is not. Peri-implant mucositis is considered a precursor to peri-implantitis, a condition which may progress rapidly, leading to advanced bone loss and resulting in loss of an implant.
Peri-implantitis is biologically more aggressive than periodontitis. It tends to progress more rapidly and unpredictably than periodontitis, and its treatment outcome is less predictable.
History of periodontitis is a major risk amplifier. The 10-year incidence of peri-implantitis was 6% in patients without a history of periodontitis, compared to 29% in subjects with a history of periodontitis.
Surgical treatment is frequently required. Non-surgical treatment of peri-implantitis through mechanical debridement - often coupled with antibiotics or laser therapy - yields limited improvements in clinical parameters , and surgical access is commonly necessary for established disease.
Regular specialist maintenance is not optional. Supportive peri-implant maintenance is essential for long-term peri-implant tissue stability and health.

Why Specialist Periodontist Care Is Essential for Peri-Implantitis

The clinical complexity of peri-implantitis management - encompassing differential diagnosis of bone loss aetiology, implant-specific instrumentation, surgical decision-making across resective and regenerative modalities, surface decontamination protocols, and long-term maintenance - places it firmly in the domain of specialist periodontal care.

A survey of registered specialists in periodontology in Australia and the United Kingdom found no consensus on treatment standards for the management of peri-implant diseases, and an American survey of periodontists revealed the absence of a standard therapeutic protocol and significant variation in the empirical use of therapeutic modalities. This variability underscores why patients require access to clinicians with deep, current specialist training - not a generalised approach.

At Smile Solutions, our board-registered specialist periodontists bring the postgraduate Masters-level training and clinical experience required to navigate every stage of peri-implant disease management: from early detection through to complex surgical reconstruction. Our in-house collaboration with prosthodontists ensures that prosthetic factors contributing to peri-implantitis - including cement remnants, crown contour, and access for hygiene - are addressed as part of a genuinely integrated treatment plan (see our guide on Why Choose Smile Solutions for Periodontal Treatment for a full account of our specialist capabilities).

If you have dental implants and have noticed bleeding around them, changes in the way they feel, or have not had a specialist implant review, do not delay. The window for reversible treatment is narrow - and the cost of inaction is the implant itself.

Smile Solutions has been providing specialist periodontal care from Melbourne's CBD since 1993. Located at the Manchester Unity Building, Level 12 and Tower, 220 Collins Street, Smile Solutions brings together 60+ clinicians - including 25+ board-registered specialists - who have cared for over 250,000 patients. No referral is required to book a specialist appointment. Call 13 13 96 or visit smilesolutions.com.au to arrange your specialist periodontal consultation.

References

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