13 March 2009 Implant alignment in total elbow arthroplasty: conventional vs. navigated techniques
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Incorrect selection of the native flexion-extension axis during implant alignment in elbow replacement surgery is likely a significant contributor to failure of the prosthesis. Computer and image-assisted surgery is emerging as a useful surgical tool in terms of improving the accuracy of orthopaedic procedures. This study evaluated the accuracy of implant alignment using an image-based navigation technique compared against a conventional non-navigated approach. Implant alignment error was 0.8 ± 0.3 mm in translation and 1.1 ± 0.4° in rotation for the navigated alignment, compared with 3.1 ± 1.3 mm and 5.0 ± 3.8° for the non-navigated alignment. Five (5) of the 11 non-navigated alignments were malaligned greater than 5° while none of the navigated alignments were placed with an error of greater than 2.0°. It is likely that improved implant positioning will lead to reduced implant loading and wear, resulting in fewer implantrelated complications and revision surgeries.
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Colin P. McDonald, James A. Johnson, Graham J. W. King, and Terry M. Peters "Implant alignment in total elbow arthroplasty: conventional vs. navigated techniques", Proc. SPIE 7261, Medical Imaging 2009: Visualization, Image-Guided Procedures, and Modeling, 726112 (13 March 2009); doi: 10.1117/12.813439; https://doi.org/10.1117/12.813439

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