Knee Alignment Contributions to Anterior Cruciate Ligament (ACL) Injury
This study evaluates the the anatomic factors of the knee that may predispose to ACL injury.
|Study Design:||Observational Model: Case-Only
Time Perspective: Cross-Sectional
|Official Title:||Tibiofemoral Alignment: Contributing Factors to Noncontact Anterior Cruciate Ligament Injury|
- Measurement of anatomy of knee [ Time Frame: 1 hour ] [ Designated as safety issue: No ]
|Study Start Date:||November 2007|
|Estimated Study Completion Date:||October 2009|
|Estimated Primary Completion Date:||October 2009 (Final data collection date for primary outcome measure)|
healthy volunteer athletes and excluded those who had any of the following criteria: 1) counter-indications to magnetic resonance imaging (e.g., pregnancy or postsurgical hardware [plates, screws, aneurysm clip, implanted cardiac pacemaker, etc.]); (2) relevant medical problems (e.g., connective tissue problems, paralyzed hemidiaphragm, morbid obesity, claustrophobia, etc.); (3) clinical signs of an impairment or abnormality in the knee (e.g., abnormal range of motion, muscle weakness, or malalignment); (4) injury to the knee that required medical attention; (5) previous surgery on the knee; or (6) current pain in the knee.
Despite intense study of anterior cruciate ligament injury during the past three decades, the mechanisms of this injury have not been clearly defined. A recent study by the Principle Investigator identified differences in leg alignment when a single leg landing during a sports activity resulted in a torn ACL and when it did not (provocative versus control alignment, respectively).
The purpose of the study is to quantify the tibiofemoral alignment in the lateral compartment of the knee in the provocative landing position and the control landing position. in order to elucidate possible mechanisms of ACL injury Material and Methods: 25 normal controls will be recruited from the greater Washington DC population. Magnetic resonance images in the sagittal plane will be acquired for a single leg of each subject. These images will cover the lateral compartment of the knee and will be acquired with the leg in three positions, one that emulates the injury position, one that exagerrates the injury position, and one that emulates the control landing position. Statistical analysis of the measurements between the provocative, exagerrated provocative, and control positions will then be performed.
These insights could then be applied to improving training focused on reducing the incidences of ACL rupture; improving bracing designs to help athletes most at risk of ACL rupture or those recovering from ACL injury/surgery; and improving ACL replacement surgeries.
|United States, Maryland|
|Open MRI of Washington|
|Rockville, Maryland, United States, 20850|
|Principal Investigator:||Barry P Boden, MD||The Orthopedic Center|