A 68-year-old woman with recurrent anterior dislocation after total hip replacement through an anterolateral approach is best managed with which bearing option during revision?

• A Larger femoral head (36 mm metal-on-polyethylene)
• B Ceramic-on-ceramic bearing
• C Constrained acetabular liner
• D Dual mobility construct ✓

Explanation

Dual mobility constructs provide the largest effective head size and greatest jump distance, making them the preferred option for recurrent instability. They combine a small articulation within a larger bearing surface. Constrained liners are reserved as a last resort because they transfer stress to the bone-cement interface and have limited longevity. Larger heads alone may not suffice in recurrent instability.

Reference: Campbell's Operative Orthopaedics, 14th ed.

High-yield for: NEET PGINI-CETNExTFMGEUSMLEPLABMRCP

Written and medically reviewed by the StethoPrep medical team.