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a) Line 1 represents the longest medial-lateral dimension in the distal tibia. b) Introduction of line 2 as collinear, parallel, and 20 mm proximal to line 1. c) Definition of the coronal reference axis (CRA) after identifying the midpoints of lines 1 and 2. d) Sectioned tibia showing measurement of the coronal tibial slope based on the methods outlined by Hashemi et al. [11].
