Bone cut guide apparatus and method

A bone cut guide includes a stem 630 having a stem longitudinal axis and an anchoring portion 602 proximal to the stem 630 and connected to the stem 630 by a cut body 600. The anchoring portion 602 includes an anchoring opening configured to receive a wire 2400 therethrough to connect the anchoring portion 602 to a bone. The cut body 600 includes a cut slot 650 configured to receive a saw to cut the bone. The slot 650 may be perpendicular to the stem axis. The anchoring opening may be at an angle to the stem axis. Also disclosed is a method of joining bone pieces while allowing adjustment of the angle of flexion between the pieces.