Fig 3.

Guide pins for planned anterior corticotomy in a right knee. (A) With the aid of fluoroscopy, a single 0.062-in C-wire is passed from anterior to posterior in the medial third of proximal tibia. This pin is placed to be perpendicular to the shaft of the tibia and parallel to the tibial joint surface. This step is repeated at the same level into the lateral third of the proximal tibia at the same level. A total of 4 pins are used to outline the desired anterior corticotomy area. (B) Fluoroscopic images are obtained to ensure pins are even and parallel to one another as they will serve as a guide for the initial corticotomy site.