Preclinical Evaluation of a Novel Image Guidance System for Glenoid Implant Positioning in Total Shoulder Arthroplasty

Description

The presentation is delivered by Adam Hopfgartner who outlines a preclinical evaluation of the Bullseye image guidance system designed for accurate positioning of glenoid implants during total shoulder arthroplasty (TSA). With over 51,000 TSA procedures performed annually in the U.S., precise glenoid implant positioning is crucial for the longevity of prostheses and optimal postoperative function. Hopfgartner highlights the challenges faced with traditional methods reliant on guide pin insertion, which can lead to malpositioning and result in a significant percentage of surgeries potentially requiring revision due to impaired function or implant failure.



The Bullseye system employs a guess-and-check workflow aided by structured light technology to create a 3D optical image of the glenoid fossa, interfacing this data with preoperative imaging to provide surgeons with a visualization of guide pin placement during surgery.



In this study, conducted on four cadaveric models, Hopfgartner emphasizes the aim to assess the visualization accuracy of the Bullseye system in comparison to traditional CT and MRI workflows. The results indicate that the CT-based approach slightly outperformed the MRI method in terms of accuracy, with specified trajectory and offset errors well within clinical safety margins.



Future steps include human testing to examine the system's integration into clinical workflows, with considerations to automate aspects of the image registration process for enhanced usability. The presentation concludes with acknowledgments to collaborators and a call for further research.

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