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Related Experiment Videos

Contrary view: wear is not an issue.

Lawrence D Dorr1

  • 1The Arthritis Institute, Inglewood, CA 90301, USA. Patricia.Paul@TenetHealth.com

Clinical Orthopaedics and Related Research
|November 20, 2002
PubMed
Summary
This summary is machine-generated.

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Total knee replacements with round-on-round designs do not present wear issues. Avoiding normal kinematics in implant design prevents wear complications in total knee arthroplasty.

Area of Science:

  • Orthopedic surgery
  • Biomedical engineering
  • Materials science

Background:

  • Wear is a significant concern in total knee replacements (TKRs), potentially leading to complications and revision surgeries.
  • Understanding the relationship between implant design and wear is crucial for improving long-term TKR outcomes.

Purpose of the Study:

  • To evaluate the role of implant design, specifically round-on-round configurations, in mitigating wear complications in total knee replacements.
  • To determine if mobile-bearing designs offer advantages over fixed designs regarding wear.

Main Methods:

  • Analysis of wear performance in total knee replacements with round-on-round designs (e.g., Total Condylar, Insall-Burstein prostheses).
  • Review of existing data on mobile-bearing versus fixed-bearing knee replacements concerning wear complications.

Related Experiment Videos

  • Assessment of specific component materials and fixation methods (cobalt chrome femoral component, monoblock tibial component, all-polyethylene patella, cemented fixation).

    • Main Results:

    • Total knee replacements utilizing round-on-round designs, such as the Total Condylar and Insall-Burstein prostheses, did not exhibit wear as a significant issue.
    • Designs that do not aim to replicate normal joint kinematics appear to avoid wear complications.
    • Currently, no data suggest that mobile-bearing knee replacements reduce wear complications compared to round-on-round fixed designs.

    Conclusions:

    • Wear is not an issue in total knee replacements when employing a round-on-round design, particularly with specific material and fixation choices.
    • Implant designs that deviate from replicating normal kinematics are less prone to wear-related problems.
    • Further research is needed to validate any potential wear benefits of mobile-bearing designs over established round-on-round fixed designs.