What is the optimal position of lipped acetabular liners to improve THA stability?

Shayna Korol -   Print  |

Placing the lip of the elevated acetabular liner in the posteroinferior quadrant may improve stability in total hip arthroplasty, according to a study in the Journal of Orthopaedic Surgery and Research.

Researchers placed lipped trial liners in 14 hips around the posterior clock-face of the implanted acetabular shell component. The average cup inclination angle was 31 degrees ± 6 degrees. The most common liner position that imparted the greatest stability to posterior subluxation was posteriorly for left hip and inferiorly for right hip.

Study authors observed no association between cup inclination or anteversion angle with the most stable liner position.

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