Fig. 2

Schematic illustrations of bone cutting (thin lines represent the mechanical axis of the tibia and bold lines represent the surface of bone cutting).

Tibial bone resection perpendicular to the mechanical axis with the standard insert (a). Tibial bone resection with 10 degrees of the posterior slope with the standard insert (b). Tibial bone resection perpendicular to the mechanical axis with the specially-made insert sloped posteriorly by 10 degrees (c). Note that the resulting articular surface geometry and the thickness of the thinnest point of the insert are identical between the two inserts (d)