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Updated: Jan 25, 2026

Imaging of the Microstructural Failure Mechanism in the Human Hip
Published on: September 29, 2023
New Failure Mechanism of Acetabular Constrained Liner: A Case Report
John Wilkinson1, Paul K Edwards1, Mathew Levine1
1Department of Orthopaedic Surgery, University of Arkansas for Medical Sciences, Little Rock, Arkansas.
Abstract:
Implant dislocation following total hip arthroplasty, particularly revision arthroplasty, remains a common postoperative complication. Constrained acetabular liners provide surgeons with an implant option that provides resistance to dislocation forces. These added forces, however, are transmitted to the implant materials and to the bone\endash implant interface, resulting in unique failure mechanisms. This case report presents two cases highlighting a previously unreported mechanism of failure of the Depuy Pinnacle ES constrained liner encountered during intraoperative implantation of the components (Journal of Surgical Orthopaedic Advances 28(1):68-73, 2019).
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