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Related Experiment Videos

Superior dislocation of the patella with interlocking osteophytes

M G Siegel, S S Mac

    The Journal of Trauma
    |March 1, 1982
    PubMed
    Summary

    Superior patellar dislocation, a rare condition, occurs without tendon rupture, often due to hyperextension. It is easily reduced and allows full post-reduction motion.

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    Area of Science:

    • Orthopedic Surgery
    • Radiology
    • Sports Medicine

    Background:

    • Superior dislocation of the patella is a rare injury.
    • This specific type of dislocation is characterized by interlocking osteophytes.

    Observation:

    • The condition was documented only once radiographically.
    • It occurs without associated tendon rupture.
    • Hyperextension forces are implicated in its etiology.

    Findings:

    • Reduction of the superior patellar dislocation is straightforward via manipulation.
    • No anesthesia is required for the reduction procedure.
    • Patients regain full active motion after reduction.

    Implications:

    • This entity must be differentiated from vertical patellar dislocations.
    • Recognition of this distinct patellar dislocation is important for appropriate management.
    • The ease of reduction and recovery highlights its unique biomechanical profile.

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