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- Talk
- 15/09/2021
- Canada
Quantification of Trunnion Damage in a Series of Intact Total Hip Arthroplasty Femoral Stems Previously Identified To Be at Risk of Catastrophic Failure
Description
In this presentation by Mark Heidenreich from the London Health Sciences Center, the focus is on the complication known as trunnionosis in total hip arthroplasty. Mark introduces the topic by acknowledging the contributions of his co-authors and the Canadian Orthopaedic Association, clarifying that he has no disclosures. He explains how corrosion of the femoral trunnion has been recognized as an increasing concern, which can result in various degrees of failure, from subtle wear to complete implant failure. Notably, certain designs of femoral components from a specific manufacturer have shown a higher risk of catastrophic failure.
The presentation details the investigative methods used to study trunnionosis, highlighting the evaluation of femoral components retrieved from non-trunnionosis failures, rather than just focusing on failed components. A total of 24 cementless Stryker Accolade One femoral stems were retrieved and analyzed, with roughly 80% showing some degree of corrosion. Notably, fretting was observed in all cases, particularly pronounced in the inferior quadrants of the trunnions.
Material loss was primarily concentrated in the inferior quadrants, suggesting a correlation with previously reported patterns linked to implant failures. He emphasized the necessity for continued research due to the small sample size and potential subjective nature of their corrosion assessment methods.
Mark concludes by stressing the importance of long-term clinical follow-up for patients with these femoral components, advocating for a proactive approach to diagnostics when problems are noted, especially regarding suboptimal hip performance.