Research And Application Demonstration Of Intelligent Orthopedic Reduction Equipment

Part I: design and evaluation of series and parallel configurationsObjective: To improve and upgrade the reduction mechanism based on Stewartplatform and testify the capability of the system, we have made a literature review onfracture treatment theory and technique and investigation on computer assistedorthopedic surgery, associated with former study and prototype of long bone fracturereduction mechanism. Method: After we introduced a new reduction strategy,improved the reduction mechanism and redesigned the reduction configuration withengineering and technology and reprogrammed the corresponding software, wevalidated the entire system using a fracture model of bovine femur for7times.Results: Based on the mirror-registration technique, we introduced a series andparallel configuration and a hybrid-driven system in new reduction configuration andcreated a new fracture classification, preoperative trajectory planning and closed-loopcontrol system. Precision tests were performed seven times on a bovine femur with atransverse fracture. Residual deviation was1.23±0.60mm in axial deflection,1.04±0.47mm in translation,2.34±1.79°in angulation, and2.83±0.96°in rotation.Conclusion: Our new reduction system described here is detachable, flexible, andmore precise in coordinate transformations. The detachable, modular design willallow for more future analogous applications. Part II: design and evaluation of binocular visual navigation onmanipulative reduction of diaphyseal fracturesObjective: To develop a binocular visual navigation on manipulative reduction ofdiaphyseal fracture, we have made a literature review on imagery navigation andinvestigation on computer assisted orthopeadic surgery. Method: We used themirror-registration technique as our reduction strategy and MicronTracker asbinocular visual navigation equipment for diaphyseal fracture manipulative reductionand validated the entire system using a fracture model of PVC femur. Results:Precision tests were performed several times on the PVC femur model with atransverse fracture. Residual translation deviation was within2mm and angulationdeviation was under2°. Conclusion: The binocular visual navigation can providehigh precision for manipulative reduction of diaphyseal fracture and can bepopularised in remote areas.