When casting for orthotics, in what position should the medial and longitudinal axes be held?

When casting for orthotics, in what position should the medial and longitudinal axes be held?

• A. Neutral
• B. Dorsiflexed
• C. Maximally pronated
• D. Maximally supinated

Answer: (C)

Casting for orthotics should capture the foot in the position it will function during stance, so the device can provide the intended correction. For an orthosis designed to control pronation, the medial and longitudinal axes are held in maximal pronation. This places the arch in a fallen, eversion posture in the cast, so the resulting orthosis will include medial arch support and appropriate posting to resist pronation and help align the foot toward a more neutral position during weight-bearing. Casting in neutral, dorsiflexed, or a supinated position would underrepresent the pronation deformity or overcorrect in the opposite direction, leading to less effective control or patient discomfort.

Casting for orthotics should capture the foot in the position it will function during stance, so the device can provide the intended correction. For an orthosis designed to control pronation, the medial and longitudinal axes are held in maximal pronation. This places the arch in a fallen, eversion posture in the cast, so the resulting orthosis will include medial arch support and appropriate posting to resist pronation and help align the foot toward a more neutral position during weight-bearing. Casting in neutral, dorsiflexed, or a supinated position would underrepresent the pronation deformity or overcorrect in the opposite direction, leading to less effective control or patient discomfort.