The Role of Polar Axis Angle in Acetabular Component Positioning: A Case Report on Revision Total Hip Arthroplasty.
Taylor Stauffer, Young Dong Song, Alex Anatone et al.
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Case in brief
A 76-year-old woman with a history of total hip arthroplasty presented with instability necessitating component revision. Seated imaging was utilized to evaluate the functional orientation of the components, which informed a polar axis angle-driven approach for acetabular revision. The procedure successfully improved stability, with follow-up assessments at 1 and 2 years confirming maintained stability through imaging and clinical evaluation.
What made this case unusual
The application of the polar axis angle (PAA) in preoperative planning for acetabular revision is a novel approach that contributed to the successful management of this case.
Diagnostic / clinical pearl
Utilizing seated imaging and the polar axis angle can enhance the assessment of acetabular component positioning, potentially reducing dislocation risk in revision total hip arthroplasty.
Why it matters
This case underscores the importance of innovative imaging techniques and assessment methods in optimizing surgical outcomes for patients with hip instability.