Implant Complications & Failures
Timing of Failure
- Early failure — before/around loading: failure to osseointegrate (infection, surgical overheating, poor primary stability).
- Late failure — after successful integration: usually peri-implantitis or occlusal overload.
Peri-implant Diseases
- Peri-implant mucositis — reversible soft-tissue inflammation, no bone loss.
- Peri-implantitis — inflammation with progressive bone loss (irreversible without intervention).
Prevention
Atraumatic surgery (avoid overheating), control of occlusion, good hygiene/maintenance, and avoiding residual cement.
Exam Tips ⭐
Early failure = no osseointegration; late = peri-implantitis/overload; mucositis = reversible soft tissue; peri-implantitis = bone loss.
📝 Practice MCQs — Implant Complications & Failures
Q1. Peri-implant mucositis is characterised by:
A. Bone loss
B. Reversible soft-tissue inflammation only
C. Implant fracture
D. Nerve injury
Show Answer
✅ Answer: B
Mucositis is reversible soft-tissue inflammation without bone loss.
Q2. Late implant failure is most commonly due to:
A. Surgical overheating
B. Peri-implantitis/occlusal overload
C. Poor primary stability
D. Anesthesia failure
Show Answer
✅ Answer: B
Late failures stem from peri-implantitis or overload.
Q3. Peri-implantitis differs from mucositis by the presence of:
A. Bleeding
B. Progressive bone loss
C. Plaque
D. Pain only
Show Answer
✅ Answer: B
Peri-implantitis involves progressive bone loss.
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