Abstract
Opening wedge high tibial osteotomy (OWHTO) is widely used to treat unicompartmental osteoarthritis of the knee caused by degenerative deformations of the anatomical axes of the leg. However, since it is difficult to accurately plan the surgical adjustment degrees such as coronal correction angle and tibial posterior slope angle in order to align the axes before the actual procedure, a number of studies have proposed analytical models to solve this problem. While previous analytical models for OWHTO were limited to specific tibial configurations, this study proposes a Generic analytical osteotomy model (GAOM) and a surgical planning system that are applicable for general tibial morphologies and tibia conditions. The validity and generality of the model were verified in a total of 60 OWHTO cases. Results showed that the tibial shape and the slope of the cut plane significantly affect the adjustment degrees. Comparison between the required degrees and the ones estimated from GAOM resulted in the mean error of 0.12°. The surgical planning system, based on GAOM, allows the operating surgeon to easily calculate surgical parameters needed to treat a patient.
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Recommended by Associate Editor Moon Ki Kim
Jay J. Kim is a Full Professor of the school of Mechanical Engineering at the Hanyang University, where he teaches Computer-Aided Geometric Modeling and Computer-Aided Design. He received his B.S. (1981) in Mechanical Engineering from the Hanyang University and M.S. (1983) in Mechanical Engineering from the George Washington University and Ph.D. (1989) in Mechanical Engineering from the Massachusetts Institute of Technology. His research interests include geometric modeling in computer-aided design and manufacturing, product lifecycle management and biomedical engineering, as well as applications of commercial CAD systems.
Eun-Joo Park is currently a Ph.D. student in the Department of Mechanical Engineering at the Hanyang University. She received the B.S. degree in Mechanical Engineering from the Hanyang University in 2013. Currently, her research interests focus on biomechanics, computer graphics and software engineering.
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Choi, DK., Koo, BY., Park, BK. et al. Generic analytical osteotomy model for three-dimensional surgical planning in opening wedge high tibial osteotomy. J Mech Sci Technol 30, 3877–3885 (2016). https://doi.org/10.1007/s12206-016-0753-x
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DOI: https://doi.org/10.1007/s12206-016-0753-x