What is Malalignment of the Lower Extremity?
Legs that are described as being “bow legged” (varus) or “knock kneed” (valgus) fall into the category of malalignment of the lower extremity. These conditions can be related to a congenital deformity or could be the result of prior injury or meniscus deficiency. These alignment abnormalities can predispose an individual to pain, knee instability, or even ligament injuries. Orthopedic knee specialist in the Austin, Round Rock, and Cedar Park, Texas communities, Dr. Jeff Padalecki specializes in treating patients’ malalignment of the lower extremity.
In a “balanced” knee, the weight is transferred through the middle of the joint in an even way. This situation allows the body weight to be divided across both the inside (medial) and outside (lateral) knee compartments. This scenario allows the joints to bear weight more effectively and the entire knee can “share the burden.” When the leg is not perfectly straight, the weight-bearing axis of the leg is not balanced, leading to overload on one side that can be associated with ligament, cartilage and meniscus problems.
In the “bow-legged” or varus knee, the majority of the bodyweight passes through the inside (medial) of the knee and can predispose this area to injury. This situation can be worsened by obesity, overuse or concurrent joint problem such as a meniscus tear.
In a “knock-kneed” or valgus patient, the outside (lateral) of the knee can be overloaded in the same manner. This can lead to pain of structural abnormalities that are worsened by other knee pathologies.
The improper distribution of force that results from malalignment can cause a multitude of problems in the knee, such as a meniscus tear, cartilage or even ligament damage. These conditions can cause progressive deterioration of the joint cartilage or osteoarthritis. If left untreated, the patient could potentially suffer from a loss of the articular cartilage surface, degenerative arthritis and the possibility of a knee replacement.