Fig. 2

a Two internal anchors were placed at the posterior internal and posterior outer edges of the avulsed fracture fragment with an optimal angle of approximately 45° with the tibial plateau; b One internal anchor was located at the 2 o’clock point of the bony bed rim and the other was at the 10 o’clock point by taking the arthroscopic field as the reference; c Two strands of sutures were mutually crossed and fixed to the anterolateral tibial slope with an external anchor