Squeaking in ceramic-on-ceramic total hip arthroplasty is primarily attributed to:
- A Acetabular component loosening causing micromotion
- B Edge loading due to component malposition or microseparation ✓
- C Oxidation of the ceramic surface
- D Polyethylene liner deformation
Correct answer: B. Edge loading due to component malposition or microseparation
Explanation
Squeaking in ceramic-on-ceramic (CoC) hip arthroplasty occurs in 1–10% of cases and results from edge loading when the femoral head contacts the rim of the acetabular cup due to component malposition (cup inclination >45°, anteversion errors) or dynamic microseparation during activity. This creates stripe wear and stick-slip vibrations at acoustic frequencies. Acetabular loosening causes different symptoms, and ceramic surfaces are oxidation-resistant.
Reference: Maheshwari Essential Orthopaedics, 6th ed.
High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP
Written and medically reviewed by the StethoPrep medical team.