Long Term Survival of Focally Constrained Liners in Revision Hip Arthroplasty.

Description

In this presentation, Tomas Zamora discusses the research paper titled "Long-Term Survival of Focally Constrained Liners in Revision Hip Arthroplasty." He highlights the persistent challenge of instability in hip replacements, with up to a 30% dislocation prevalence in revision cases, prompting the use of constrained liners as potential solutions. Zamora notes the emergence of focally constrained liners designed to minimize impingement while providing low dislocation risk.



Despite promising early results, the study aimed to address the gap in long-term durability reports associated with these implants. The research involved a retrospective review of patients who underwent surgeries between 2008 and 2010, focusing on those fitted with the Trilogy Longevity Constrained Liner, with a follow-up period ranging from a minimum of 10 years to the patient's death.



The study evaluated various outcomes, revealing that 55% of patients had previous recurrent instability. The results show a promising 89% survivorship free from dislocation and 80% free from any acetabular construct failure at 10 years post-operation. However, a risk analysis found that younger age was a significant predictor of dislocation, with patterns emerging that suggested higher risks associated with previous instability and smaller femoral heads.



In conclusion, the study indicates that the TLC Focally Constrained Liner may provide durable results, especially for patients at high risk who have not experienced instability before. However, those with previous instability or other risk factors may have increasing chances of new dislocations, even with this advanced implant. The presentation wraps up with a cautious yet optimistic note on the potential of focally constrained liners in hip arthroplasty.

DOI: 10.1302/3114-220799

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