For the purpose of measurement in residual adduction deformity in club foot, MTR angle is originated.
Foot axis is drawn from the center of the second metatarsal head to the center of the talar head.
The axis of the ankle is drawn between anterior margins of tibial and fibral malleolus.
MTR angle is the medial angle produced by the junction of these two lines. Average MTR angle is 95 degrers in normal foot, 98 degrees in planovalgus foot and 75 degrees in club foot treated in our clinics.
MTR angle less than 90 degrees is significant as sign of the adduction deformity.
