3 March 2017 Micro-stereotactic frame utilizing bone cement for individual fabrication: an initial investigation of its accuracy
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A new method for template-guided cochlear implantation surgery is proposed which has been developed to create a minimally invasive access to the inner ear. A first design of the surgical template was drafted, built, and finally tested regarding its accuracy. For individual finalization of the micro-stereotactic frame bone cement is utilized as this well-known and well-established material suggests ease of use as well as high clinical acceptance and enables both sterile and rapid handling. The new concept includes an alignment device, based on a passive hexapod with manually adjustable legs for temporary fixation of the separate parts in the patient-specific pose until the bone cement is spread and finally cured. Additionally, a corresponding evaluation method was developed to determine the accuracy of the microstereotactic frame in some initial experiments. In total 18 samples of the surgical template were fabricated based on previously planned trajectories. The mean positioning error at the target point was 0.30 mm with a standard deviation of 0.25 mm.
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Thomas S. Rau, Thomas S. Rau, G. Jakob Lexow, G. Jakob Lexow, Denise Blume, Denise Blume, Marcel Kluge, Marcel Kluge, Thomas Lenarz, Thomas Lenarz, Omid Majdani, Omid Majdani, } "Micro-stereotactic frame utilizing bone cement for individual fabrication: an initial investigation of its accuracy", Proc. SPIE 10135, Medical Imaging 2017: Image-Guided Procedures, Robotic Interventions, and Modeling, 101350P (3 March 2017); doi: 10.1117/12.2254304; https://doi.org/10.1117/12.2254304

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