Methods for Locating the Tibio-Femoral Contact Pathway in Total Knee Replacements Using Marker-Based Gait Analysis and Standard Radiography

摘要: INTRODUCTION The purpose of this study was to develop and test techniques for tracking the path contact between tibial femoral total knee replacement components during level over-ground walking. tibio-femoral could be an indicator in vivo performance a as estimator areas implant components. A longer path, indicative more sliding walking, indicate at risk increased wear. In addition, determines position length muscle ligament lever arms about knee, can subsequently influence force calculations. METHODS Two methods were developed predict pathways devices. Both used patient-specific kinematics obtained gait analysis, standard radiographs clinical follow-ups, point-clouds bearing surfaces. validity evaluated with wear simulator tests comparisons scars on postmortem retrieved RESULTS average anterior-posterior distance covered by ten patients implanted 29.01 mm lateral side, 21.80 medial side. predicting tibiofemoral yielded similar results, fell within simulator-tested implants. CONCLUSIONS pathway using marker-based analysis are computationally simple, reliably characteristics against from