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. 2018 Dec 13;53(2):100–105. doi: 10.1016/j.aott.2018.11.002

Fig. 1.

Fig. 1

Four zones were determined on both the medial and lateral sides of the knee. Zones were labeled 1, 2, 3, and 4, corresponding to the severity of the deformity. Deviation between 0% and 50% falls into zone 1; 51%–100% into zone 2; 101%–200% into zone 3; and >200% into zone 4. Deviations were expressed as a percentage to one half of the width of the tibial plateau.