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Related Experiment Videos

Grading the pivot shift. Objective tests with implications for treatment.

R P Jakob, H U Stäubli, J T Deland

    The Journal of Bone and Joint Surgery. British Volume
    |March 1, 1987
    PubMed
    Summary

    A new grading system for the pivot shift test objectively quantifies knee laxity. This reproducible method aids pre-operative planning and improves the comparison of surgical outcomes for anterior cruciate ligament injuries.

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    Area of Science:

    • Orthopedic surgery
    • Biomechanics of the knee

    Background:

    • The pivot shift test is crucial for assessing anterolateral rotatory instability in the knee.
    • Current grading lacks objectivity and reproducibility, hindering clinical decision-making.

    Purpose of the Study:

    • To propose a logical, objective, and reproducible grading system for the pivot shift test.
    • To define and quantify different types and degrees of knee laxity.

    Main Methods:

    • Examination of the pivot shift test in varying rotational positions of the tibia.
    • Assessment of the proposed system against an "unblocked" anterior subluxation test.
    • Validation using radiographic measurements, operative findings, and clinical results.

    Main Results:

    Related Experiment Videos

    • The proposed grading system allows for precise definition and quantification of knee laxities.
    • The system demonstrated reliability when compared to existing methods and clinical outcomes.

    Conclusions:

    • The developed grading system offers a valuable tool for pre-operative assessment and surgical planning.
    • Standardized use of this system will enhance the accuracy of comparing postoperative results across different centers and procedures.