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Related Experiment Videos

Dislocated polyethylene inserts in fixed-bearing total knee arthroplasty.

Brent A Lanting1, Richard W McCalden, Douglas D R Naudie

  • 1Division of Orthopedic Surgery, London Health Sciences Center, University of Western Ontario, London, Ontario, Canada.

The Journal of Arthroplasty
|December 21, 2010
PubMed
Summary

Dislocated polyethylene inserts are a rare failure in fixed-bearing total knee arthroplasty. This report details three cases, showing presentation and unique treatment complications of this uncommon orthopedic issue.

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Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering

Background:

  • Total knee arthroplasty (TKA) is a common procedure for end-stage knee arthritis.
  • Fixed-bearing designs are widely used, but implant failure can occur.
  • Polyethylene insert dislocation is a rare but significant complication.

Observation:

  • Presents three cases of dislocated polyethylene inserts in fixed-bearing TKAs.
  • Details the clinical presentation and diagnostic challenges.
  • Highlights the specific surgical scenarios leading to insert displacement.

Findings:

  • Polyethylene insert dislocation represents a rare mode of TKA failure.
  • Treatment involves complex revision strategies due to the nature of the dislocation.
  • Associated complications can impact patient outcomes and surgical complexity.

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Implications:

  • Understanding this rare failure mode is crucial for orthopedic surgeons.
  • Highlights the need for careful surgical technique and implant selection in TKA.
  • Informs strategies for managing and potentially preventing polyethylene insert dislocation.