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Related Experiment Videos

Stiffness after total knee arthroplasty.

Charles L Nelson1, Jane Kim, Paul A Lotke

  • 1Department of Orthopaedic Surgery, Hospital of the University of Pennsylvania, 2 Silverstein, 3400 Spruce Street, Philadelphia, PA 19104, USA. charles.nelson@uphs.upenn.edu

The Journal of Bone and Joint Surgery. American Volume
|September 6, 2005
PubMed
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Stiffness affects 1.3% of total knee arthroplasty patients. Revision surgery improved range of motion and function, but benefits were modest for this disabling complication.

Area of Science:

  • Orthopedic Surgery
  • Biomedical Engineering
  • Rehabilitation Medicine

Background:

  • Knee stiffness is a disabling complication following total knee arthroplasty (TKA).
  • The prevalence of post-TKA stiffness is not well-established in existing literature.
  • Outcomes of revision surgery for stiff knees after TKA require further evaluation.

Purpose of the Study:

  • To determine the prevalence of stiffness after primary total knee arthroplasty.
  • To evaluate the efficacy of revision surgery for treating knee stiffness post-TKA.

Main Methods:

  • Defined stiff knee as 15° flexion contracture and/or <75° flexion.
  • Reviewed 1000 primary TKAs to assess stiffness prevalence.
  • Evaluated 56 revision surgeries for stiffness, pain, or loosening post-TKA.

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Main Results:

  • Stiffness prevalence was 1.3% in 1000 primary TKAs.
  • Revision surgery improved Knee Society scores (function, pain) and range of motion.
  • 93% of revised knees showed improved arc of motion; 80% improved flexion.

Conclusions:

  • The prevalence of stiffness after primary TKA is 1.3%.
  • Revision surgery offers a satisfactory treatment for TKA stiffness, improving function and motion.
  • While beneficial, the overall improvements from revision surgery for stiffness are modest.