Fig. 3From: Association of osteoporosis and varus inclination of the tibial plateau in postmenopausal women with advanced osteoarthritis of the kneeThe medial tibial plateau angle (MTPA) is measured on the whole-leg weight-bearing radiograph. It is defined as the medial angle between the tibial articular marginal line and the mechanical axis line of the tibia (line from the ankle center to the center of the tibial spines)Back to article page