What modification is most effective to prevent lateral slippage of a foot on an orthotic?

The lateral flange is an effective modification used to prevent lateral slippage of the foot on an orthotic. This feature provides support and stability along the outer aspect of the foot, helping to maintain proper alignment and positioning. By extending upward on the side of the orthotic that corresponds to the lateral aspect of the foot, the lateral flange creates a barrier that helps to secure the foot in place, thereby minimizing any unintended movement.

This modification is particularly advantageous for individuals who may have issues with over-pronation or instability, as it helps anchor the foot and ensure that the forces during walking or running are appropriately managed. This level of stability can enhance comfort and performance by reducing the risk of falling or developing blisters due to excessive movement.

In contrast, while other modifications like higher heels, medial arch pads, and metatarsal pads serve important functions, they primarily focus on aspects like posture, arch support, and distribution of pressure, rather than directly addressing lateral stability. Thus, when it comes to specifically preventing lateral slippage, the lateral flange stands out as the most direct and effective modification.