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Fig. 2 | BMC Musculoskeletal Disorders

Fig. 2

From: Total knee arthroplasty in femoral bowing: does patient specific instrumentation have something to add? A randomized controlled trial

Fig. 2

Planning for lateralization of the IM guide with lateral femoral bowing. Mechanical axis of the femur and potential IM guide axis from the apex of the intercondylar notches is marked with red lines. A yellow dotted line is drawn traversing the lateral cortex that represents the most capable path of passing through the IM canal. The lateralized entry point is in a position equivalent to half the diameter of the guide (orange arrow) (a). A perpendicular line to the mechanical axis is drawn (blue line), representing the distal femoral cut. The cutting angle is the product of 90° subtracted from angle “a” (b)

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