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A Novel Application of Musculoskeletal Ultrasound Imaging
Published on: September 17, 2013
Knee kinematic profiles during drop landings: a biplane fluoroscopy study
Michael R Torry1, Kevin B Shelburne, Daniel S Peterson
1Biomechanics Research Laboratory, Steadman Philippon Research Institute, Vail, CO, USA. mtorry@ilstu.edu
Medicine and Science in Sports and Exercise
|August 7, 2010
Summary
This study reveals direct correlations between knee valgus angle and anterior tibial translation (ATT) and lateral tibial translation (LTT) during drop landings. Understanding these dynamic knee motions is crucial for injury prevention.
Area of Science:
- Biomechanics
- Kinesiology
- Orthopedics
Background:
- The complex six degrees of freedom knee motion during dynamic activities remains poorly understood.
- Dynamic knee joint kinematics are critical for understanding injury mechanisms.
Purpose of the Study:
- To measure three-dimensional knee rotations and translations during stiff drop landings using biplane fluoroscopy.
- To determine the relationships between three-dimensional knee rotations and anterior tibial translation (ATT) and lateral tibial translation (LTT).
Main Methods:
- Six healthy males performed stiff drop landings from a 40 cm height.
- High-speed biplane fluoroscopy captured knee motion, calculating rotations and translations.
- Statistical analysis assessed relationships between kinematic variables.
Main Results:
- Significant correlations were found between ATT and knee valgus angle (r2 = 0.39, P = 0.006).
- Strong relationships were observed between LTT and internal rotation (r2 = 0.96, P < 0.0001).
- LTT also showed a significant quadratic relationship with knee valgus angle (r2 = 0.90, P < 0.0001).
Conclusions:
- This study establishes a direct correlation between knee valgus angle and both ATT and LTT during drop landings.
- Findings enhance understanding of dynamic knee joint mechanics and injury risk factors.
