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Cone beam CT axial planes corresponding to the tibial component tray (a) and the tibial tuberosity (b), both necessary to measure the tibial component rotational angle (black arch). In this case, the plane of the tibial tuberosity corresponds to the lower tibial plane in the assessment of the periprosthetic bone and muscles. PO, popliteus muscle; GM, gastrocnemius medial muscle; GL, gastrocnemius lateral muscle; SO, soleus muscle; TA, tibialis anterior muscle.
