During revision total hip arthroplasty, the Paprosky type IIIB acetabular defect is encountered. This classification primarily guides which aspect of the reconstruction?

• A Choice of femoral stem length and fixation method
• B Risk of sciatic nerve injury during exposure
• C Degree of acetabular bone loss requiring augmentation or reinforcement ring ✓
• D Need for modular femoral head size selection

Explanation

The Paprosky classification of acetabular bone defects specifically categorises the severity and location of acetabular rim and column losses to guide reconstruction strategy. Type IIIB represents severe deficiency involving the anterior and posterior columns with pelvic discontinuity, requiring structural allograft, reinforcement cages (Burch-Schneider), or cup-cage constructs. The classification does not primarily address femoral-side decisions or nerve risk.

Reference: Maheshwari Essential Orthopaedics, 6th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.