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. 2024 May 30;13(9):103054. doi: 10.1016/j.eats.2024.103054

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© 2024 The Authors

This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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Fig 1 — Left knee assessment for posterior tibial slope on lateral standing radiographs. Posterior tibial slope (PTS) (yellow lines) is measured using the anatomic axis of the tibia and the lateral tibial plateau. The anatomic axis of the tibia is determined by drawing a line though the center of the tibia at 5 cm distal to the joint line and 5 cm proximal to the ankle joint (not visualized). The measurement (73.8°) should be subtracted from 90° to obtain the measurement for PTS, 16.2° in this case. The size of the correction should aim to restore the patient to about 5-7° of PTS and is calculated by about 1 cm per 1° for the anterior closing wedge proximal tibial osteotomy.