Fig. 2

Brief introduction of the fracture models and the FE models. a SALF + ALP. b SPLF + ALP. c SPLF + PLP. d The FE model of SALF + ALP after meshing. e The FE model of SPLF + PLP with axial stress and constrain. f The location of axial stress. g A section of FE model after assigning the materials, the distribution of CT value, and the scale of materials. FLA: the green line connects the middle point of the posterior cruciate ligament’s insertion on the tibial plateau, and the medial 1/3 point of the tibial tuberosity was acted as a neutral axis; the blue line connects the two sides of fracture line