Abstract

The use of Mechanical Axis Finder (MAF) is reliable in achieving the correct mechanical axis in (93.3%) out of 100 consecutive Axis Knee System Surgeries. Correct mechanical Axis is defined as 0 degrees(- neutral) + - 3 degrees. The rest (6.7%) fell 4-7 degrees of varus or 8-9 degrees valgus. Post-operative scanograms (hip-knee-ankle) were obtained in all 100 knees, 2-3 months after surgery. Patello-femoral tracking based on patella lateral displacements on Laurin patellar x-ray view, eighty nine percent exhibited normal or minimal lateral displacement. There was no patellar dislocation. All bone preparations of both femur and tibia were performed using extramedullary method. The preoperative knee society pain score improved from 49.59 to 88.95 at 2-3 months follow up. The patient satisfaction rate, average score was 87.8%. Complications consisted of 2 infection, 2 aseptic femoral loosening requiring revision and two knee stiffness. With the use of the Axis Knee System, the cost of TKA in the Philippines is markedly reduced by 100-200%.