Saarland University’s Homburg Medical Campus has announced a new robotic-assisted surgical procedure for joint replacement that eliminates the need for traditional bone pins and external infrared cameras. The innovation, led by Professor Stefan Landgraeber, director of the Department of Orthopaedics and Orthopaedic Surgery, and research associate Philipp Winter, aims to enhance patient safety and reduce the invasiveness of orthopedic procedures.
Historically, robotic systems in orthopedic surgery have relied on bone pins—3.2-millimetre metal pins anchored directly into the bone—to track its position using an external infrared camera system. This method, while effective, has been associated with risks such as bone fractures and damage to surrounding soft tissue. The new approach from the Saarland University team replaces this external tracking system with the robot’s own internal sensors.
The new technology allows the robot to independently scan the surgical field, such as a bone or prosthesis, to determine its exact spatial position and create a precise three-dimensional model. This process is supplemented by two-plane X-ray images, ensuring accurate navigation. “Our robot can independently scan the surgical field and create an accurate 3D model,” Professor Landgraeber explained. “This enables highly precise navigation and permits the exact placement of screws and drill holes without relying on external reference systems.”
The core of the technology is the robot’s internal coordinate system, which establishes its spatial relationship to the surgical area. A patent application for the technology has been filed, with support from the ‘Triathlon—Integrated Ecosystem for Entrepreneurship, Innovation and Transfer at Saarland University.’
Photo credit UKS/Laura Glücklich
