Which type of orthosis is commonly used for medial-lateral stability in the ankle?

The hinged ankle-foot orthosis (AFO) is specifically designed to provide medial-lateral stability while allowing for controlled movement at the ankle. This design is particularly beneficial for individuals who require support without completely immobilizing the joint. By incorporating hinges, this type of orthosis permits dorsiflexion and plantarflexion while maintaining the required stability along the medial-lateral axis, essential for activities such as walking or standing.

In contrast, a solid AFO offers full stability by completely immobilizing the ankle and foot, which is not always desirable for individuals who need some range of motion. A bivalve AFO can also provide support, but its function is primarily geared toward accommodating swelling and easier application, rather than optimizing movement while offering stability. The dynamic AFO, while useful for facilitating mobility, does not focus specifically on medial-lateral stability. Thus, the hinged AFO stands out as the best option for achieving both stability and functional movement at the ankle.