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Related Experiment Videos

Wrist stability after experimental traumatic triangular fibrocartilage complex lesions.

Bo Munk1, Steen Lund Jensen, Bo Sanderhoff Olsen

  • 1Hand Section, Aarhus Amtssygehus, University Hospital of Aarhus, 8000 Aarhus C, Denmark.

The Journal of Hand Surgery
|February 1, 2005
PubMed
Summary

Traumatic triangular fibrocartilage complex lesions significantly impact wrist stability, particularly the 1C type. Understanding these effects is crucial for effective treatment and clinical assessment of wrist injuries.

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Area of Science:

  • Orthopedic surgery
  • Biomechanics
  • Anatomy

Background:

  • The triangular fibrocartilage complex (TFCC) is vital for wrist stability.
  • Traumatic TFCC lesions can lead to wrist instability and pain.
  • Current understanding of how specific TFCC lesions affect wrist biomechanics is incomplete.

Purpose of the Study:

  • To evaluate changes in wrist stability following experimental traumatic triangular fibrocartilage complex lesions.
  • To determine the impact of different TFCC lesion types (Palmer classification 1A-1D) on wrist biomechanics.
  • To assess the influence of forearm rotation on wrist stability after TFCC injury.

Main Methods:

  • Utilized 16 cadaver wrist specimens.
  • Tested intact specimens, followed by dorsal arthrotomy and experimental TFCC lesions (1A-1D).

Related Experiment Videos

  • Measured radioulnar deviation and internal/external rotation under a 0.75 Nm load across a -60 to +60 degree flexion range.

    • Main Results:

    • A 1C TFCC lesion significantly altered wrist stability.
    • Significant changes in radioulnar deviation and internal/external rotation occurred at 35 degrees of wrist extension for 1C lesions.
    • TFCC lesions 1A, 1B, and 1D did not significantly affect wrist stability.
    • Forearm rotation (pronation/supination) did not influence the outcome.

    Conclusions:

    • TFCC lesion 1A does not significantly impact wrist stability, suggesting current treatments like partial disc excision are safe.
    • TFCC lesion 1C significantly compromises wrist stability, with specific alterations in motion at 35 degrees of wrist extension.
    • These findings may inform the development of clinical tests for diagnosing 1C TFCC lesions.