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About

J. Ohnsorge is a pioneer in computer-assisted orthopedic surgery, with a focused expertise in fluoroscopy-based 3D reconstruction for revision total hip replacement. Their major contribution lies in addressing one of the most challenging aspects of revision hip surgery: the safe and efficient removal of distal femoral bone cement. Ohnsorge developed a novel mathematical and imaging approach that reconstructs the three-dimensional volume of the PMMA cement plug using only a limited number of 2D X-ray images, thereby reducing the need for exhaustive intraoperative imaging and minimizing surgical risk. This work, central to the MINARO project (Minimal Invasive Navigation and Robotics), introduced a modular intraoperative planning system that transforms a traditionally time-consuming and risky procedure into a more precise, navigated task. With over 20 citations for their landmark 2005 paper, Ohnsorge’s research has laid the groundwork for integrating computer vision and robotics into revision arthroplasty. Their achievements demonstrate a clear impact on surgical safety and efficiency, offering a tangible path toward minimally invasive, image-guided solutions in complex joint reconstruction.