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Related Experiment Videos

The scapholunate ligament

R A Berger, W F Blair, R D Crowninshield

    The Journal of Hand Surgery
    |January 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

    Scapholunate ligament sectioning had minimal impact on scaphoid and lunate bone motion. Three-dimensional carpal kinematics showed that these wrist bones continue to track well after ligament disruption.

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    Area of Science:

    • Orthopedics and Biomechanics
    • Hand and Wrist Surgery
    • Musculoskeletal Research

    Background:

    • The scapholunate ligament is crucial for wrist stability.
    • Injuries to this ligament can lead to significant carpal dysfunction.
    • Understanding kinematic changes after ligament injury is vital for treatment.

    Purpose of the Study:

    • To analyze the three-dimensional kinematics of scaphoid and lunate bones after scapholunate ligament sectioning.
    • To quantify the impact of ligament disruption on carpal bone motion.
    • To assess the relative tracking between the scaphoid and lunate bones.

    Main Methods:

    • Scapholunate ligament sectioning was performed in a cadaveric model.
    • Three-dimensional kinematics of scaphoid and lunate bones were captured using a sonic digitizer.

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  • Carpal bone motion was analyzed using the screw displacement axis concept.

    • Main Results:

    • Few significant kinematic changes were observed in screw displacement axis orientation after ligament sectioning.
    • Carpal bone rotation about the screw displacement axes showed minimal alterations.
    • The relative tracking between the scaphoid and lunate bones remained largely unaffected.

    Conclusions:

    • Sectioning the scapholunate ligament did not result in major disturbances of scaphoid and lunate bone motion.
    • The scaphoid and lunate bones continue to track well relative to each other despite ligament disruption.
    • Further research may explore the functional implications of these kinematic findings.