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Why total knees fail-A modern perspective review.

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  • 1Department of Orthopaedic Surgery, Davis Medical Center, University of California, Sacramento, CA 95817, United States. zacharylum@gmail.com.

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Summary

Total knee arthroplasty (TKA) failures are increasingly driven by infection, though loosening and instability remain primary revision causes. Understanding these failure modes is crucial with rising TKA rates and healthcare costs.

Keywords:
Aseptic loosening total kneePeriprosthetic joint infectionRevision total knee arthroplastyTotal knee arthroplasty failure mechanismTotal knee arthroplasty failure modeTotal knee arthroplasty instability

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Area of Science:

  • Orthopedic surgery
  • Biomaterials science
  • Healthcare analytics

Background:

  • Historically, aseptic loosening, instability, and malalignment were primary causes of total knee arthroplasty (TKA) failure.
  • Advances in polyethylene production reduced failures due to wear and osteolysis.
  • Recent data indicate infection is now the leading acute cause of TKA failure, while loosening and instability persist as major reasons for revision.

Purpose of the Study:

  • To analyze the evolving mechanisms of total knee arthroplasty failure.
  • To highlight the importance of understanding TKA failure modes in the context of increasing procedure volume and value-based healthcare.

Main Methods:

  • Review of clinical databases and worldwide national registries.
  • Analysis of longitudinal studies on TKA failure modes.

Main Results:

  • Infection has emerged as the primary acute cause of TKA failure.
  • Aseptic loosening and instability remain the predominant overall reasons for TKA revision surgery.
  • These findings are corroborated by clinical databases and national registries.

Conclusions:

  • Understanding the changing patterns of TKA failure is essential for improving patient outcomes.
  • The shift towards infection as a primary acute failure mode necessitates focused preventative and treatment strategies.
  • Continued monitoring of TKA failure mechanisms is critical for optimizing orthopedic care and healthcare value.