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Related Experiment Videos

"V" shaped predens space.

S P Bohrer, A Klein, W Martin

    Skeletal Radiology
    |January 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

    The "V" shaped widening of the predens space in flexion may not indicate transverse ligament injury. This finding in trauma patients is often due to ligament laxity, not tears.

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    Area of Science:

    • Radiology
    • Orthopedics
    • Anatomy

    Background:

    • Widening of the predens space (PDS) in flexion is a concerning radiographic finding in trauma patients.
    • This widening has been traditionally associated with transverse ligament injury at the atlantoaxial joint.
    • Associated findings may include widening of the C-1/C-2 interspinous distance.

    Purpose of the Study:

    • To evaluate the significance of "V" shaped PDS widening in flexion.
    • To determine if this finding reliably indicates transverse ligament injury.
    • To explore alternative explanations for "V" shaped PDS widening.

    Main Methods:

    • Review of radiographic findings in trauma patients presenting with "V" shaped PDS widening.
    • Correlation of imaging findings with clinical evaluations.

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  • Analysis of the biomechanics of the upper cervical spine during flexion.

    • Main Results:

    • The "V" shaped PDS widening is often attributed to increased rotational mobility at the atlantoaxial joint.
    • Developmental elongation or laxity of the cranial transverse ligament or posterior ligamentous complex is a common cause.
    • Isolated tearing of the cranial transverse ligament appears to be extremely rare, with no definitively proven cases reported.

    Conclusions:

    • "V" shaped PDS widening in flexion may not necessarily indicate acute transverse ligament injury.
    • Increased ligamentous laxity or developmental factors are more likely explanations.
    • Clinical evaluation is crucial for assessing potential posterior ligamentous complex injuries in these patients.