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Patellar biomechanics.

H Kaufer

    Clinical Orthopaedics and Related Research
    |October 1, 1979
    PubMed
    Summary
    This summary is machine-generated.

    Removing the patella (kneecap) significantly impairs knee extension strength and function. Patellectomy leads to lasting deficits in knee power, stability, and range of motion.

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    Area of Science:

    • Orthopedic Surgery
    • Biomechanics
    • Knee Joint Anatomy

    Background:

    • The patella is crucial for knee extension, contributing significantly to the extensor mechanism's moment arm.
    • Understanding the patella's role is vital for evaluating the impact of its removal.

    Purpose of the Study:

    • To elucidate the functional consequences of patellectomy on knee biomechanics and performance.
    • To detail the specific deficits resulting from the absence of the patella.

    Main Methods:

    • Analysis of biomechanical data related to knee extension.
    • Review of functional outcomes following patellectomy procedures.

    Main Results:

    • Patellectomy reduces the knee extensors' moment arm by 13-30%.

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  • Key deficits include diminished knee extension power, extension lag, and instability.
  • Altered joint mechanics manifest as chronic effusion, altered flexion centers, and reduced range of motion.

    • Conclusions:

    • The patella is indispensable for optimal knee extensor function.
    • Patellectomy results in a complex pattern of functional and biomechanical impairments affecting knee performance.