What is the most common long-term cause of failure requiring revision in both total hip and total knee arthroplasty?
- A Periprosthetic joint infection
- B Instability and dislocation
- C Aseptic loosening ✓
- D Periprosthetic fracture
Correct answer: C. Aseptic loosening
Explanation
Aseptic loosening remains the most common long-term cause of failure in both THR and TKR, driven by particulate debris-induced osteolysis. Periprosthetic joint infection is the most common cause of early failure. Instability is more common after THR than TKR. Periprosthetic fractures are increasing in incidence but remain less common than loosening as a cause of revision.
Reference: Insall and Scott Surgery of the Knee, 7th ed.
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Written and medically reviewed by the StethoPrep medical team.