Intramedullary fixation screw, a fixation system, and method of fixation of the subtalar joint

A method for fusing the subtalar joint, comprising:

• providing a lag screw member;
• forming a hole in each of the calcaneus and talus medullary canals;
• reaming an internal surface of the calcaneus and talus medullary canals;
• providing a targeting guide assembly comprising an elongated rod, a circular handle and a alignment guide;
• inserting the elongated rod into the drilled hole at a predetermined depth;
• aligning the alignment guide with the subtalar joint;
• inserting a cutting blade into a percutaneous incision and into the elongated rod;
• reaming a plurality of articulating surfaces of the calcaneus and talus medullary canals;
• inserting the lag screw member into the drilled hole;
• and
• applying torque to the lag screw member causing the lag screw member to compress the subtalar joint.