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Knee Ligament Injuries

Classification of knee joint instability resulting from ligament injury:

  • I. One-plane instability (simple or straight) 

    • A.One plane medial 

    • B.One plane lateral 

    • C.One plan posterior 

    • D.One plane anterior

  • II. Rotary instability 

    • A.Anteromedial 

    • B.Anterolateral 

      • 1.In flexion 

      • 2.Approaching extension

    • C.Posterolateral 

    • D.Posteromedial

  • III. Combined instability 

    • A.Anterolateral-anteromedial rotary 

    • B.Anterolateral-posterolateral rotary 

    • C.Anteromedial-posteromedial rotary

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