Maine Orthopaedic Review Monthly Challenge

Quiz: Test Your Knowledge of Total Hip Arthroplasty

Bruce F. Gomberg, MD; Ira Kirschenbaum, MD

Disclosures

January 11, 2017

Dislocation complicates 1%-3% of primary THAs and 7%-10% of revision procedures. Patient, surgical, and implant factors play an important role in the etiology of dislocation after THA. Important surgical factors leading to dislocation include component malpositioning, failure to restore leg length or offset, preserving the abductor mechanism, or using the posterior surgical approach. If the acetabular or femoral components are malpositioned, then revision of the misplaced component (particularly a retroverted acetabular socket) is the best strategy.[3,4,5]

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