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Journal of Experimental Orthopaedics
Fig. 1 | Journal of Experimental Orthopaedics

Fig. 1

From: The 3-triangle method preserves the posterior tibial slope during high tibial valgus osteotomy: first preliminary data using a mathematical model

Fig. 1

a Axial view of the tibial plateau: The height of the vertical gap at the posteromedial osteotomy site (Y1) is a function based on the law of triangles. Subsequently, the height of the vertical gap at the anteromedial osteotomy site (Y2) is determined based on the distance L between the two gap measurements, the height of the vertical gap measurement at Y2, the tibial width X1 and the angle of the anteromedial tibial cortex α. b Sagittal view of the proximal tibia: In case of equal anterior and posterior vertical gap height an increase of the posterior tibial slope will be observed. To maintain the normal posterior tibial slope the vertical gap height at the posteromedial cortex (Y1) will always be greater than at the anteromedial tibial cortex (Y2). Modified figure. Human Tibia (https://skfb.ly/6ursI) by Eric Bauer is licensed under Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/)

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