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http://dx.doi.org/10.3795/KSME-B.2012.36.3.351

Effect of Anteromedial Cortex Oblique Angle on Change of Tibial Posterior Slope Angle in High Tibial Osteotomy Using Computer Assisted Surgery (CAS)  

Lee, Ho-Sang (Dept. of Mechanical Engineering, Hanyang Univ.)
Kim, Jay-Jung (Dept. of Mechanical Engineering, Hanyang Univ.)
Wang, Joon-Ho (Dept. of Orthopedics, Samsung Medical Center Sungkyunkwan Univ. School of Medicine)
Kim, Cheol-Woong (RITE, Korea University / Triple-C Medical Corp.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers B / v.36, no.3, 2012 , pp. 351-361 More about this Journal
Abstract
The leading surgical method for correcting the misalignment of the varus and valgus in the knee joint is the high tibial osteotomy (HTO). In the opening wedge HTO (OWHTO), there is no concern about damaging the peroneal nerve on the lateral tibia of the proximal fibula. OWHTO has been the preferred choice, as the opening of the correction angle can be modulated during the operation. The correction of the varus and valgus on the coronal plane are performed adroitly. Nevertheless, there have been numerous reports of unintended changes in the medial tibial plateau and posterior slope angle (PSA). The authors have developed an HTO method using computer-assisted surgery with the aim of addressing the abovementioned problems from an engineer's perspective. CT images of the high tibia were reconstructed three-dimensionally, and a virtual osteotomy was performed on a computer. In addition, this study recommends a surgical method that does not cause changes in the PSA after OWHTO. The results of the study are expected to suggest a clear relationship between the anteromedial cortex oblique angle of each patient and the PSA, and an optimal PSA selection method for individuals.
Keywords
High Tibial Osteotomy(HTO); CT Image Reconstruction; Posterior Slope Angle; Hinge Axis Angle; Anteromedial Cortex Oblique Angle; Gap Angle; Wedge Angle;
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