Peri-Implant Diseases and Maintenance: A Practical Guide

Implants cannot get cavities, which tempts patients to believe they need no care. But the gum and bone around an implant can become infected just like tissues around a natural tooth — and with no periodontal ligament to wall off infection, the disease can destroy bone faster. Peri-implant diseases are the main reason implants fail years after successful placement.

The good news: these diseases are largely preventable and, caught early, treatable. The battle uses the same weapons as against gum disease: daily plaque removal plus regular professional maintenance. Knowing the two stages tells the patient exactly what to watch for.

Key Concepts

• Peri-implant mucositis: gum inflammation with bleeding on probing but no bone loss. Reversible with better cleaning — the warning stage.
• Peri-implantitis: inflammation plus progressive bone loss, deepening pockets, sometimes pus. Can cost the implant if untreated.
• Bleeding on probing: the earliest clinical sign; healthy implant gums never bleed on gentle probing.
• Probing depth: measured in millimetres; increasing depth over time signals disease.
• Risk factors: poor hygiene, smoking, history of gum disease, diabetes, excess cement under the gum.
• Maintenance interval: professional review and cleaning every 3 to 6 months, set by individual risk.

How It Works

Disease starts with plaque at the implant-gum junction, especially under a poorly shaped crown or around excess cement. Bacteria trigger inflammation: the gum swells and bleeds — mucositis. If plaque remains, inflammation reaches the bone, which resorbs away from the threads — peri-implantitis. With no ligament barrier, bone loss can accelerate quickly once started.

Treatment follows the stage. Mucositis reverses fully with professional cleaning and better home care. Early peri-implantitis gets deep cleaning with non-scratching instruments plus antiseptics. Advanced cases need surgical surface cleaning, grafting, or — when hopeless — implant removal. Prevention is vastly easier than any of these.

Worked Example

A patient returns one year after implant placement. Findings:

1. Probing depth 6 mm on the cheek side — was 3 mm at crown fitting, an increase of 3 mm.
2. Bleeding on probing, with slight pus.
3. X-ray: 2 mm of bone loss around the threads versus the baseline X-ray.
4. Diagnosis: peri-implantitis (bone loss + deepened pocket + bleeding), not mere mucositis.
5. Plan: deep cleaning with titanium-safe instruments, antiseptic irrigation, 3-month recalls instead of 6-month, plus smoking-cessation counselling. If bone loss progresses, surgery is discussed.

Baseline records make the diagnosis: without the original 3 mm depth and X-ray, the 6 mm pocket could pass as normal variation.

Common Misconceptions

• "Bleeding around the implant is normal." Bleeding on gentle probing is never normal — it is the earliest sign of disease and the best moment to intervene.
• "Metal instruments clean implants like teeth." Steel scalers scratch titanium, and scratches collect more plaque. Implants need plastic, carbon or titanium instruments.
• "Yearly checkups are enough." High-risk patients need 3-month recalls — 4 cleanings a year. Skipping them is how mucositis silently becomes peri-implantitis.

Real-World Applications

• Every implant patient joins a maintenance programme with scheduled recalls, like orthodontic or gum-disease patients.
• Hygienists use implant-safe kits and teach interdental brushes and water flossers around crowns.
• Baseline X-rays and probing charts at crown fitting give every future visit a comparison point.
• Smoking-cessation advice is part of aftercare, since smokers develop peri-implantitis at markedly higher rates.

An implant is a lifelong commitment, not a one-time purchase. Brush it, floss around it, show it to the dentist on schedule — and the bone that gripped the titanium in those first quiet weeks will hold it for decades.