How Does a Complex Knee Injury Occur?
A complex knee injury occurs due to a traumatic incident. This often involves a high-speed motor vehicle accident, severe athletic injury, or a bad twisting fall. The high energy injury can dislocate the knee, in which the bottom of the thigh bone (femur) which normally creates a hinge joint with the top of the shin bone (tibia) disengages. The two bones can suffer a partial or complete separation from one another.
The mechanics of a knee dislocation typically occurs when the knee is bent slightly and a force causes the lower leg to rotate outward. In a knee dislocation, the ACL and/or PCL tear. In addition, the MCL and/or LCL also tear. are injured. A knee dislocation is an orthopedic emergency, that requires immediate medical attention.