In managing flexible pes planus, what type of orthosis is typically recommended?

In the management of flexible pes planus, a UCBL (University of California Biomechanics Laboratory) orthosis is particularly effective as it provides both support and alignment to the foot's arch. This type of orthosis works by controlling the foot's position within the shoe, addressing overpronation and providing a more stable base during ambulation. The UCBL design cups the heel and supports the medial arch, which helps redistribute forces during walking and reduces discomfort that may arise from the lack of arch support.

Custom foot orthoses also offer support and cushioning, but they may not provide the same level of control as a UCBL orthosis, especially in more severe cases of flexible pes planus. Rigid AFOs, while beneficial for significant foot drop or controlling more severe gait deviations, are generally not indicated for flexible pes planus since they can limit necessary dorsiflexion and have a different functional focus. A patellar stabilizer is unrelated to foot mechanics and is used for knee support rather than addressing conditions of the foot.

Therefore, the UCBL orthosis stands out as the best option for effectively managing flexible pes planus due to its specific design and intended function.