What modification can be made to an AFO for a flexible varus deformity?

For a flexible varus deformity, adding a lateral "tab" just proximal to the malleolus is an effective modification. This approach helps to provide additional support and control of the foot's alignment during gait. The lateral tab works to counteract the varus position by pushing against the foot, aiding in achieving a more neutral alignment while still accommodating the flexibility of the deformity. This feature is crucial for individuals who have a range of motion at the ankle but still require guidance to maintain proper positioning during walking.

Modifications that are not as effective in this scenario, like adding a medial tab or extending the lateral footplate trimline, do not address the fundamental need for control of the lateral aspect of the foot. Similarly, extending heel height primarily serves to enhance stability, but it doesn’t specifically target the varus deformity.