Computerized Navigation: A Useful Tool in Total Knee Replacement.

Use two 3-mm drill pins for fixation of the optical array to the tibia and femur.If pins are placed within the wound (not through separate stab incisions), plan the positioning relative to the implant to avoid obstruction of the trials.In severely osteoporotic patients, use bicortical fixation and handle the tissues and limb gently to avoid bumping or displacing the optical array as this will negatively alter the registration and reduce navigational accuracy.Make sure the reflective beads on the optical array are clean at all times and remove them (if using clip-on beads) when using the saw to avoid blood splatter.Train an assistant to press the screen buttons in the correct order and in accordance with the surgical progress.