Lecture on Biomechanics of GENU VALGUM & GENU VARUM. Genu valgum exist when the medial tibiofemoral joint angle increases more than 185 degree or 5 degree change of femur from vertical.The normal medial tibiofemoral angle is approximately around 180-185 degree.When this angle decreases it lead on to GENU VARUM,here it decreases less than 175 degree.
Both GENU VALGUM AND GENU VARUM results in biomechanical alterations in joint dynamics, it leads to increase in compressive loads on medial and lateral compartment respectively as well as KNEE OSTEOARTHRITIS,ARTICULAR CARTILAGE DAMAGE and even JOINT LAXITY.Easy way to remember and differentiate between valgum and varum along with changes in unilateral and bilateral changes are also discussed.
The question why THE KNEE OSTEOARTHRITIS IS MORE COMMON IN MEDIAL COMPARTMENT OF KNEE is answered within discussion.
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TONY JOSEPH
ASSISTANT PROFESSOR
KANNUR MEDICAL COLLEGE