Fig. 5

Morphometry and coordinate system analysis of CT-based 2D reconstruction of sagittal fibular head and posterior tibial plateau map. A Sagittal view illustrating the posterior position of the apex of the fibular head relative to the posterior border of the tibial plateau. B The posterior edge of the tibial plateau was positioned anteriorly to the apex of the fibular head in 46 intact knee. Coordinate system showing corresponding plate positions and the distance of AO and PO which represent superior space of the fibular head. C Sagittal view illustrating the anterior position of the top of the fibular head relative to the posterior border of the tibial plateau. D The posterior border of the tibial plateau was situated posteriorly to the apex of the fibular head in 4 intact knee. Coordinate system showing corresponding plate positions and the distance of AO, PO and TO which represent superior space of the fibular head. Point A, the foremost point of the anterior edge of the fibular head; Point P, the intersection of the plumb line of line O at the posterior edge of lateral tibial plateau with the fibular head; Point T, the apex of the fibular head; Line O, articular surface line; Orange Round, Cases of non-compliance