In addition, the system is provided with a drive mechanism (14), which pivots the saw jig (2) about the horizontal.

The invention relates to a bone sawing jig for facet resection of knee joint femur condyles, comprising two side cheeks (20) detachably connected thereto to fix the femur and having holes (27, 28) to accommodate fixing pins.

An embodiment of the invention discloses a saw jig (22) for supporting a substrate (26) on a compressible support pad (30).

A sawing calliper (40) with the same basic shape as the nail calliper and with identical holes for the fixing nails (28) can be placed on the fixing nails which were left in the femur (10).

A clamp (24) is mountable onto the saw jig (22) for clamping the substrate therebetween without impeding access of a saw blade (68) to the substrate (26).

Precise allocation of boring pairs by both the nail and sawing calliper enables torque to be transferred to the artificial knee joint system at a ratio of 1:1 according to the predetermined size of the part of the femur that is to be implanted.