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. 2017 Feb 13;5(2):2325967116688664. doi: 10.1177/2325967116688664

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© The Author(s) 2017

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License (http://www.creativecommons.org/licenses/by-nc-nd/3.0/) which permits non-commercial use, reproduction and distribution of the work as published without adaptation or alteration, without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 2. — Examples of the various knee structural measurements. (A) The posterior tibial slope (PTS) was defined as the difference between 90° and the angle (θ) between the longitudinal axis of the tibia and a line (L1) that connects the superior-anterior and superior-posterior cortices of the proximal tibia. (B) The meniscal bone angle (MBA) was defined as the angle (θ) between L1 and a line (L2) that lies along the superior surface of the wedge-shaped posterior meniscal cartilage. (C) The middle cartilage slope (MCS) was defined as the difference between 90° and the angle (θ) between the longitudinal axis of the tibia and a line (L3) that joins the most superior portions of the anteriorly and posteriorly located prominences of the middle articular cartilage surfaces. (D) The posterior meniscal height (PMH) was defined as the length of a line (L4) parallel to the longitudinal axis of the tibia and connects the top of the posterior meniscal cartilage and the point at which the posterior meniscus intersects the middle articular cartilage.