ArticleThe international journal of medical robotics + computer assisted surgery : MRCAS2026
Global Workflow of a Comanipulation-Based Robotic System for Cervical Spine Surgery.
Article in The international journal of medical robotics + computer assisted surgery : MRCAS, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundCervical arthrodesis requires precise pedicle screw placement to ensure safety and effectiveness. Traditional planning and execution are time-consuming and prone to variability.
methodsWe developed a robot-assisted system integrating three components: an AI-based preoperative planning module, adapted from previous work, to generate patient-specific screw trajectory from 3D CT point-clouds; an intraoperative registration and motion compensation system with optical tracking to align the trajectory with patient anatomy in real time; and a comanipulation control strategy enforcing virtual fixtures and depth limits to guide the robotic arm safely. The system was tested on 3D-printed models and cadaveric specimens.
resultsRobotic assistance significantly improved the geometric accuracy of drilling, reducing transverse positional deviations by a factor of two and orientation deviations by a factor of eight compared with freehand procedures. In addition, the average drilling depth overshoot was reduced by 50%. Perforation rates were found to be of the same order as those observed with freehand techniques.
conclusionThe proposed workflow improves trajectory-following accuracy and depth control while preserving intuitive surgeon interaction. These results demonstrate the feasibility of integrating AI-based planning, intraoperative tracking, and collaborative robotics for cervical spine surgery.
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