Lateral capsualr ligament complex: anatomical and surgical considerations

Area of Science:

• Orthopedic Surgery
• Biomechanics
• Sports Medicine

Background:

• Acute avulsion of the lateral capsular ligament's bony attachment is a recognized injury.
• Understanding the biomechanical contribution of the lateral capsular complex to knee stability is crucial for effective treatment.

Purpose of the Study:

• To identify the anatomical components of the lateral capsular complex.
• To determine the role of these structures in causing lateral rotary instability.
• To evaluate a novel surgical technique for reconstructing the lateral capsular ligament and iliotibial tract.

Main Methods:

• Dissection of six amputation specimens to identify lateral capsular complex components.
• Dynamic studies on amputation specimens to assess structures contributing to lateral instability.
• Surgical reconstruction in 30 patients involving anterior and inferior advancement of the lateral capsular ligament and iliotibial tract.

Main Results:

• Dissection revealed distinct vertical and horizontal components of the lateral capsular ligament complex.
• Lateral pivot shift was induced by releasing the lateral capsular ligament, anterior cruciate ligament, and tibial collateral ligament.
• Surgical reconstruction involving advancement of the lateral capsular ligament and iliotibial tract successfully restored stability in 30 patients.

Conclusions:

• The lateral capsular ligament and iliotibial tract play significant roles in maintaining knee stability.
• Advancing both the lateral capsular ligament and iliotibial tract with intact anatomical connections is an effective reconstructive strategy for lateral rotational instability.