Fig. 2
From: Can medial stability be preserved after open wedge high tibial osteotomy?
The joint line convergence angle was measured using radiographs. The angle between two lines is joint line convergence angle. a A valgus force of 40 N was exerted at extension before plate removal. b A valgus force of 40 N was exerted at a flexion position of 20° before plate removal. c A valgus force of 40 N was exerted at extension after plate removal. d A valgus force of 40 N was exerted at a flexion position of 20° after plate removal